JPS60225834A - Dynamic type flat light emitting strobe device - Google Patents

Abstract

PURPOSE:To vary easily and accurately the substantial guide number of flat light emission by making at least one of both a level and a time variable. CONSTITUTION:A main switching element connected in series with a flash discharge tube 14 is opened on the basis of a light emission stop signal generated when the quantity of light of the discharge tube 14 attains to a specific level and closed on the basis of a light emission restart signal generated a specific time after the generation of the light emission stop signal. Further, at least either of said specific level and specific time is made variable. Consequently, the light emission stop signal and light emission restart signal are generated repeatedly to emit impulsive light by the discharge tube 14 repeatedly during the shutter exposing operation of a camera.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a strobe memory for taking strobe photography in synchronization with a shutter release, and more specifically, to a flash discharge tube that repeatedly emits pulsed light. The present invention relates to a dynamic flat light emitting strobe device in which light emission has a substantially constant intensity.

(Prior art) In general, the light emission intensity of the flash discharge tube in the f2tK strobe is peak-like and rapidly increases from the time the light emission starts, and the light emission ends in an extremely short period of several milliJ seconds. (See characteristic S0 in Figure 1).

Therefore, in a camera that employs a focal play shutter, there is a problem that the strobe may emit synchronized light at a high shutter speed that is higher than the strobe synchronization time, and normal strobe photography cannot be performed. In other words, the focal plane shutter does not fully open when the shutter speed is higher than the strobe synchronization time.

The slit formed by the leading and trailing curtains runs in front of the film surface, but in such a case, no matter at what point the strobe device fires the flash, only part of the film surface will be exposed to the strobe light. It was not possible to take photographs with uniform exposure.

Therefore, in order to eliminate the above-mentioned problems, K.

A flat light emitting strobe device k (hereinafter referred to as a static type flat light emitting strobe device) that continues to emit flash light at a substantially constant intensity while a slit travels in front of the film surface has already been provided ( (See characteristic S1 in FIG. 1). This static type flat light emitting strobe has an amount of 1. For example, as described in Japanese Patent Application Laid-open No. 129527/1982, a series circuit consisting of a flash discharge tube, an inductor, and a switching element is connected to both ends of a main capacitor in which light emission energy is stored. The basic circuit configuration is that a diode is connected in parallel to a series circuit formed by a flash discharge tube and an inductor. Then, the amount of light emitted from the flash discharge tube is monitored, and when the amount of light emitted from the flash discharge tube falls below a predetermined value, the switching element is turned on, and conversely, when the amount of light exceeds a predetermined value, the switching element is turned off. It is designed to emit flat light with a constant light intensity.

In conventional static flat flash flash memory, the amount of light emitted by the flash discharge tube or a monitor value approximately equivalent to this amount of light is compared with a preset reference value, and if the monitor value exceeds the reference value, the Turn off the above switching element,
Conversely, when the monitored value falls below the reference value, the switching element is turned on. Therefore, since the switching element is controlled to be on/off between the upper and lower limit values that are very close to each other with the reference value as the boundary, an extremely high-precision circuit configuration is required and the circuit configuration is complicated. At the same time,
There is a problem in that malfunctions are likely to occur due to variations in circuit components.

In addition, the conventional static type flat emitting strobe f2
At this point, an impedance element such as a resistor is inserted in series with the flash discharge tube, and the discharge current of the flash discharge tube flowing through this impedance element is detected, and on/off control of the switching element is performed based on this. If the impedance element is overloaded, the light emission loss due to the impedance element increases, and there is also a fear that the relationship between the change in the light emission intensity and the change in the discharge current will not match, making it impossible to perform accurate light emission control.

Furthermore, if the terminal voltage of the flash discharge tube is detected and the switching element is controlled on/off based on this, the transient voltage generated by turning on/off the switching element may There is also a possibility that the on/off control of the switching element may malfunction.

On the other hand, K, which varies the amount of light emitted by a static flat flash flash device, is designed to change the voltage between the terminals of the flash discharge tube as described in Japanese Patent Publication No. 48-40421. There is a problem in that a complicated adjustment circuit is required because the change in emission intensity is nonlinear.

(Objective) The present invention has been made in view of the above-mentioned circumstances, and its object is to control the flash discharge tube so that it repeatedly emits nozzle-like light, thereby eliminating the need for conventional static type discharge tubes. A flat light emitting strobe device (hereinafter referred to as "flat light emitting strobe device") that can obtain light emitting characteristics substantially equivalent to those of a flat light emitting strobe device.

The object of the present invention is to provide a dynamic flat light emitting strobe device (referred to as a dynamic flat light emitting strobe device), and in particular, it is possible to easily and accurately vary a substantial guide number for flat light emitting.

(Summary) The dynabar type flat light emitting strobe device of the present invention has the following features:
An opening operation of the main switching element connected in series with the flash discharge tube is performed based on a light emission stop signal generated when the light amount of the flash discharge tube reaches a predetermined level, and a closing operation of the main switching element is performed. is carried out based on a light emission restart signal generated when a predetermined time has elapsed since the generation of the light emission stop signal, and at least one of the above predetermined level and the above predetermined time is variable, and the above-mentioned The present invention is characterized in that by repeatedly generating the light emission stop signal and the light emission restart signal, pulsed light emission by the flashlight tube is repeatedly generated during the shutter exposure operation of the camera.

(Example) Next, before explaining the present invention, it will be explained to what extent the light emission interval of continuous pulsed light emission according to the present invention can be made coarser in practice in relation to the light time.

When P is a light emission interval of t1 which is 31 light hours, the number of light emissions n during time t is given by the following equation.

・=t/P ・・・■ To simplify the theoretical formula, if the emission time of each pulse emission is treated as "0", rnJ will be an integer value, so if 1/ is an integer value: n = ['/P] ...■t/
When P is not an integer value: n=[t/] or n=['/pco+1...■. Here, the Gaussian symbol [a] represents the largest integer that does not exceed the real number a.

To explain the above formulas ① and ② based on Fig. 2, the touching part of the exposure time in the figure is [t/P] ±1 (=4), and the white part is [t/p] ( =5), it can be seen that mft is achieved. Also, as mentioned above, during the light emission time,
0'', one of the front and rear intersections in the exposure diagonal line in FIG. 2 is not calculated.

As can be seen from Fig. 2, if we consider ideal slit illumination that is uniform over the entire screen, a uniform illumination effect can be obtained by selecting rPJ as a common divisor of rtJ, and the maximum value of rPJ is rtJ. This means that it can be done as follows. However, as is well known, an actual focal plane shutter has variations in exposure time for each screen portion due to differences in running characteristics between the front and rear curtains. Now ±ds the back mountain unevenness
Consider a shutter with a nominal exposure time T guaranteed to tep. The actual no-light time in this shutter ranges from a maximum of 2×T (shortest side) to 2d×dT (longest side) depending on the screen portion. Therefore, the emission interval is rPJ
As explained above, the number of times of light emission included in each limit time is . Considering the difference from the standard value [T/P] under the worst conditions, the value will be small on the shortest side and large on the longest side, so the step difference formula with the standard value on the longest side will be For simplification, if we take the emission interval P as a common divisor of rTJ, then P will always be an integer.''/p = n (IlE number)
Therefore, the formulas ■ and ■ are different. Furthermore, by subtracting the inherent shutter exposure time unevenness, that is, ±dstep, from this value, we can calculate the exposure value unevenness ΔE increased by the strobe light.
V1(n) and ΔEV 2 (n) can be calculated.

4.1(.)=. . ,,"2dx・co-(-d)
----Eigenvalue d for each U shutter is 0 and 2, respectively.
When calculating the above formula 〇 as 0.3, it becomes as shown in Tables 1 to 6, and the characteristics when graphed are as shown in Figure 3 1
It becomes as shown in . As can be seen from Figure 3, if the allowable increase in unevenness when using a strobe is 0.1, then r
rP which makes nJ 10, that is, "/p = n = 10
All you have to do is choose J, and if the above tolerance is 0.2, then T/
It is sufficient to select rPJ such that = n = 4. Since the change in rTJ decreases as the number of included pulses increases, it goes without saying that rTJ should be set to the nominal maximum seconds.

In other words, the exposure unevenness can be reduced to a guaranteed maximum of 0.2 EV.
/1000 seconds, the increment is 0. If you want to keep it to IEV, '/1000 x 1/p = 10, P =
'/1ooo.

The rPJ set as is the minimum pulse width allowed, and 0
．． If up to 2 EV can be tolerated, rPJ can be up to /4000. This is a value that can be achieved with sufficient margin using the technique of the present invention.

No. 111 Table 2 Table 3 In general, regarding the amount of light of artificial lighting for photography,
The guide number (GN) when the film sensitivity is A8A (I80) 1000 is treated as the most common value. There are various theories on how to correct the coefficient between the guide number and the amount of light emitted L (CD-8), but in principle, with K as the correction coefficient, the following relational expression holds true: . It is known that if the amount of light is expressed by the guide number ON, then the aperture value that provides the appropriate exposure can be calculated using the extremely simple calculation GN=(aperture value) x (distance).

Therefore, the embodiments of the present invention also adopt the idea of displaying the light amount using guide numbers, but when performing slit exposure, only a part of the emitted light amount contributes to the actual film surface exposure, so the total light emitted amount value is GN display is not appropriate. Therefore, in the embodiment of the present invention Ql, only the amount of light that passes through the slit and actually contributes to the exposure of the film surface out of the amount of emitted light is treated as the effective guide number Oi at I80100. Since this effective guide number GNe naturally changes if the slit interval, that is, the exposure time changes, it is necessary to specify the exposure time. In other words, the effective guide number is 〇Ne(t) when the slit exposure time is t. In other words, the amount of light emitted once during the slit exposure time t (ms)! When pulse emission of 0 is performed n6 times, the effective guide number is GN e (t) = K J"; 55 crowns from the above ■ formula.
・It can be expressed as ■. Therefore, by changing this effective guide number GNe(t), it is possible to photograph objects at the same distance using different aperture values, and it is also possible to shoot objects at a relatively close distance with a small effective guide number. This means that you can take pictures with the guide number GNe(t), and this has the same advantages as switching the guide number of a general strobe, such as reducing the power consumption of the strobe. .

In the embodiment described later, the shutter speed name. . . (i.e., the effective guide number at an exposure time of 1 mB) is 5.45,
An example of 8.11 that can be switched in three stages is set.

When the photographer switches the effective guide number 〇Ne using a manual switching ring installed outside the strobe, the switching ring works in conjunction with the pulse emission amount control means inside the circuit, thereby changing the pulse emission amount. Now, if the effective guide number〇Ne(1) is 8 when pulsed light emission with a light emission amount of 6 is emitted n1 times during the slit exposure time of 1 m5 (/';.0.), then the above From equation (9), GNe (1) = 8 = KJ "F * mam, @) Therefore, without changing the light emission interval, that is, without changing the number of light emission n1, the effective guide number GNe (1) Considering changing to 5.6, the amount of pulsed light emitting j1 in the above [phase] formula can be changed to 5.6=Kqma possible e@e...... Therefore, it is sufficient to change the pulsed light emitting element jK that satisfies 0. , Solving the above formula, 5.61! = ノ, X (-) = 0,5 right... The amount of pulsed light emission 71 may be increased by 0.5 times, or conversely, when the effective guide number GNe(1) is set to 11, it may be increased to 2 times.

As a means of changing the above-mentioned effective guide number GNe, in addition to changing the pulse light emission amount to, as is clear from the above equation 0, the light emission amount during time is changed by a number no (i.e., one light emission interval of 4 degrees). You may also do so. In other words, in this case, the effective guide number, -G
When Ne(t) is changed from 8 to 5.6, the number of light emissions n of the above formula 0 increases by 0.5 times, and 11. To do this, the interval between each light emission should be adjusted to 2.0 times, that is, the light emission timing of the pulsed light emission should be adjusted to double or halve. or,
By using both in combination, it is also possible to accurately change the effective guide number GNe over a wider range.

From the above explanation, if the emission interval of continuous pulsed emission is appropriately selected, exposure unevenness will substantially occur! It can be seen that the effective guide number can be changed by changing the light emission interval or the intensity of each pulse light emission.

Next, a first embodiment of the dynamic type flat light emitting device will be described with reference to FIGS. 4 to 11.

The dynamic flat light emitting strobe p-type flash device according to this embodiment is configured to have two functions: a "dynamic flat light emitting mode" and a "flash light emitting mode". First, the configuration of the main circuit 100 will be explained. This main circuit 1
00 is provided with a boost power supply circuit 1 consisting of a well-known DC-DC converter, and the negative output terminal of this circuit 1 is connected to the negative voltage supply line! 0 (hereinafter abbreviated as line-no.) K is connected and grounded. The positive output terminal of the circuit 1 is connected to the positive voltage supply twin 11 via a rectifying diode 2.
(hereinafter abbreviated as Twin!) K-connected.

Both twins! A main capacitor 3, which is the main power source for strobe light emission, is connected between ・ and 6, and a voltage divider circuit consisting of a series circuit of 4.5 resistors is connected, and the monitor voltage is output from the connection point of the resistors 4 and 5. Signal M is sent out at 5#/c. Also, both lines! o.

A charging completion detection circuit consisting of a series circuit of a resistor 6 and a neon lamp 7 is connected between 71, and a trigger capacitor 8 and a primary coil of a trigger transformer 9 are connected in sequence to the connection point between the resistor 6 and the neon lamp 7. It is connected to line 10 via. The connection point between the trigger capacitor 8 and the resistor 6 is connected to the anode of the trigger thyristor 10, and the cathode is connected to the line! .

The gate is connected to line 16 through resistor 11. A resistor 1 is connected to the gate of the thyristor 10.
2 and a capacitor 15, a light emission trigger signal is supplied. trigger transformer 9-2
One end of the next coil is connected to LINE NO., and the other end is connected to the trigger electrode of a flash discharge tube 14 such as a xenon discharge tube, and one electrode of the flash discharge tube 14 is connected to LINE NO. ,It is connected to the. Both lines! . .

A series circuit including a resistor 15, a commutating capacitor 16, and a resistor 17 is connected between the resistors 6 and 6 in this order. Further, a thyristor 18 is provided for rapidly charging the commutating capacitor 16, and the anode of the thyristor 18 is connected to the line! , its cathode is connected to the connection point between the resistor 15 and the commutating capacitor 16, and its gate is connected to its own cathode via the resistor 19. Further, a rapid charging signal is supplied to the gate of the thyristor 18 via a resistor 20 and a capacitor 21 in sequence.

The cathode of the same thyristor 18 is the thyristor 22 for commutation.
The thyristor 22 is connected to the anode of the thyristor 22.
0 cathode is line! . It is connected to the. The gate of the thyristor 22 is connected to the line node via a resistor 23, and the gate is connected to the output terminal of an OR gate 26 via a resistor 24 and a capacitor 25. Two systems of stop signals C
,,C, are supplied.

The other discharge electrode of the flash discharge tube 14 is connected to the connection point between the commutating capacitor 16 and the resistor 17, and is also connected to the anode of the main thyristor 27. The cathode of the main thyristor 270 is connected to the twin node, and the gate is connected to the line node through the resistor 28. The gate of the thyristor 27 is connected to the output terminal of the OR gate 31 via a resistor 29 and a capacitor 30 in sequence, and the two input terminals of the OR gate 31 receive a light emission start signal B1 and a light emission restart signal B, respectively. is being supplied.

A control circuit 200 described below is connected to the main circuit 100 configured in this manner.

That is, as shown in FIG. 5, the control circuit 200 includes a light emission interval setting circuit section 201, a monitor circuit section 202, and a photometry circuit section 20.
3. One input terminal of the AND gate 40 is supplied with a flat light emission restart signal from a camera body (not shown), and the output terminal of the AND gate 40 is supplied with an input signal at a low level (hereinafter referred to as L level). ) to high level (hereinafter referred to as H level 5) K
Outputs an H level pulse with a predetermined width when rising.
It is connected to the input terminal of the pulse generation circuit 41. The output end of the pulse generating circuit 41 is connected to one input end of an OR gate 42, and a trigger signal and a light emission start signal B are sent out from the output end of the OR gate 42. The other input end of the OR gate 40 is connected to an input end of an inverter 43 and a movable contact terminal of a mode changeover switch 44. Same mode changeover switch 44
The first fixed contact terminal 44 is connected to the terminal to which the positive power source B is applied, and the second fixed contact terminal 44B is grounded.

One input terminal of the AND gate 45 is supplied with a flash light emission start signal from a camera body (not shown), and the other input terminal is connected to the output terminal of the inverter 43. The output terminal of the AND gate 45 is connected to the input terminal of a pulse generation circuit 46 similar to the pulse generation circuit 41, and the output terminal of the pulse generation circuit 46 is connected to the other input terminal of the OR gate 42. It is also connected to a 470-set input terminal of an R8 type 7-lip 70-tube circuit (hereinafter abbreviated as FF circuit). Same FF
The output terminal of the circuit 47 is connected to the base of the NPN switching transistor 5o via an inverter 48 and a resistor 49 in sequence! It is connected.

A resistor 5 is connected between the terminal to which the positive power supply element B is applied and the ground terminal.
1 and a variable resistor 52 that is set based on the I80 sensitivity, aperture, etc. are connected, and the collector emitter of an NPN phototransistor 53 and the resistor 5 are connected.
4 and an integrating capacitor 55 are connected in series. The connection point between the resistor 51 and the variable resistor 52 is connected to the non-inverting input terminal of an operational amplifier 56 forming a voltage comparison circuit, and the inverting input terminal of the operational amplifier 560 is connected to the
A connection point between the resistor 54 and the capacitor 55 is connected. Further, the collector and emitter of the transistor 50 are connected to both ends of the capacitor 550, respectively. The output end of the operational amplifier 56 is connected via an inverter 57 to the input end of a pulse generation circuit 58 similar to the pulse generation circuit 41, and the output end of the circuit 5B is connected to the reset input end of the FF circuit 47. A light emission stop signal C8 is sent from the output end of the pulse generating circuit 58.

The output terminal of the pulse generating circuit 41 is connected to one input terminal of an OR gate 59, and the output terminal of the OR gate 59 is F
The FF circuit 600 is connected to the input terminal of the FF circuit 600.
The output terminal of is connected to the inverter 610 input terminal.

Further, the output terminal of the pulse generating circuit 41 is connected to the FF circuit 62.
The output terminal of the FF circuit 62 is connected to one input terminal of an AND gate 63. The output terminal of the AND gate 63 is connected to the count input terminal of the preset counter 64.
The count output terminal of is connected to the set input terminal of the FF circuit 65, and the output terminal of this FF circuit 65 is connected to one input terminal of an AND gate 66. The output terminal of the AND gate 66 is connected to the respective reset input terminals of the FF circuits 62 and 65 and the preset counter 64.

Further, from the output terminal of this AND gate 66, the control circuit 2
Reset signal RE8E to reset all 00
T is now sent.

The preset counter 64 is preset with data X based on the total emission time Ul during dynamic flat emission, and this time U is the time after the leading curtain starts running and starts exposing the film. The setting is longer than the time required for the curtain to complete travel and film exposure to end.

The other input terminal of the AND gate 66 is connected to the reset input terminal of the FF circuit ω, and the FF circuit 67
is connected to the set input end. Above and gate 6
The other input terminal of 3 is connected to the output terminal of the oscillation circuit 68. A resistor 69 and a capacitor 70 for setting the oscillation frequency are connected between the oscillation circuit 68 and the electric atom B application terminal. The output terminal of the oscillation circuit 68 is connected to the AND gate 7
1, and the other input terminal of the AND gate 71 is connected to the output terminal of the FF circuit 67.

The output terminal of the AND gate 71 is the preset force Kuntahu 20.
Connected to the count input terminal. The output terminal of the preset counter 72 is connected to the input terminal of a pulse generation circuit 730 similar to the pulse generation circuit 41 described above. The output terminal of the pulse generating circuit 73 is connected to the reset input terminal of the FF circuit 67 and the preset counter 72, and is also connected to the other input terminal of the OR gate 59.

Further, from the output terminal of the pulse generating circuit 73, a quick charge signal and a light emission restart signal B are sent out.

The preset counter 72 is configured to preset data x4 based on the light emission interval time U from when the pulsed light emission stops to when the next pulsed light emission restarts during dynamic flat light emission. , this time U is set based on the shutter speed, etc.

On the other hand, the resistor 75 to which the monitor voltage signal M is supplied from the main circuit 100 is connected to the operational amplifier 7 forming a non-inverting amplifier circuit.
The inverting input terminal of the operational amplifier 76 is grounded via a resistor 7B, and a resistor 77 is connected between the inverting input terminal and its own output terminal. The output terminal of the operational amplifier 76 is connected to an integrating circuit consisting of a series circuit of a resistor 79 and a capacitor 80, and the connection point between the resistor 79 and the capacitor 80 is connected to the inverting input terminal of an operational amplifier 81 forming a voltage comparison circuit. It's been a long time. A resistor 82 and a resistor 1 are connected between the terminal to which the electric atom B is applied and the ground terminal.
A series circuit with the switching circuit 85 is connected. This resistance switching circuit 83 includes resistors 83A, 85B, and 83C, each of which has one end connected to the resistor 82, and these three resistors 83.
It consists of a changeover switch 85D in which each fixed contact terminal is connected to the other end of each of A, 85B, and 85C, and the movable contact terminal of the switch 83D is grounded. The resistance values of the resistors 83A to 83C of this resistance switching circuit 83 are set to three levels of effective guide numbers Ne5. <S, 8.11. The output terminal of the operational amplifier 81 is connected to the other input terminal of the AND gate 66 via an inverter 84 and a pulse generating circuit 85 in sequence.

The pulse generation circuit 85 is arranged so that a light emission stop signal C1 is sent out. The above resistor 79 and capacitor 8
The collector of an NPN switching transistor 86 is connected to the connection point with 0, the terminal of the transistor 86 is grounded, and the base is connected to the output terminal of the inverter 61 via a resistor 87.

Next, an explanation will be given of the operation of the 7-point light emitting device of the present embodiment constructed as shown in FIG.

First, the operation of the "dynamic flat light emission mode" will be explained using FIGS. 6 to 9. In this case, the movable contact terminal of the mode changeover switch 44 is switched to the first fixed contact terminal 44A@. Therefore, the positive atom B is supplied to the input end of the AND gate 40 and the AND gate 40 is opened, and the output of L Bell is supplied to the input end of the AND gate 450 via the inverter 43, so the AND gate 45 is opened. becomes closed. Therefore, the camera body is allowed to input the flat light emission start signal g from ゎ, but is not allowed to input the flash light emission start signal s. When it rises to the H level, the output terminal of the ANDGOOTH) 40 becomes H level, and the pulse generating circuit 41 outputs an H level hit pulse. This H level pulse is passed through the OR gate 42 as a light emission trigger signal to the capacitor 1! I
is applied to the gate of the trigger thyristor 10 through the resistor 12 and the trigger thyristor 10, thereby making the trigger thyristor 10 conductive. When the trigger thyristor 10 is made conductive, both ends of the trigger capacitor 8 are short-circuited via the primary coil of the trigger transformer 90, and the discharge current of the charge charged in the trigger capacitor 8 is transferred to the primary coil of the trigger transformer 9 kKltt, tL.
A high voltage is generated in the c secondary fill, and this high voltage is applied to the trigger electrode of the flash discharge tube 14, so that the flash discharge tube 14 is brought into an excited state. At the same time, the pulse generation circuit 4
The H-level pulse outputted from OR gate 31. Capacitor 30. The main thyristor 27 is made conductive via the resistor 29. When the main thyristor 27 is made conductive, the charge that was stored in the main capacitor 5fC is
The flash discharge tube 14 and the main thyristor 2 in the excited state
Discharge through the anode and cathode of 7, flash discharge tube 1
4 starts flashing. Furthermore, at the same time, the H level one-shot pulse output from the pulse generating circuit 41 also sets the FF circuit 60 via the OR gate 59, and the output of the FF circuit 60 becomes H level. This H-level output is inverted to L-level by the inverter 61, so the transistor 86 is turned off, and the FF M62 is set by the H-level one-shot pulse output from the pulse generating circuit 41. Therefore, the output of the FF circuit 62 is inverted to H level, and accordingly, the AND gate 63 is opened and the output pulse of the 1 oscillation circuit 68 is input to the preset counter 64, and counting is started.

On the other hand, main: 0I/capacitor 3 voltage is resistor 4 and resistor 5
The monitor voltage signal M, divided by
It is integrated by a time constant determined from 0. The integrated voltage at this time is applied as a comparison voltage vIN to the inverting input terminal of an operational amplifier 81 forming a voltage comparison circuit, and the positive electric atom B
A comparison is made with a reference voltage VREF which is obtained by dividing the voltage by the resistance values of the resistor 82 and the resistance switching circuit 83. From the relationship of the resistance values of the resistors 83A to 83C of this resistance switching circuit 83, the switch 83D of the switching circuit 8s is connected to the resistance 83A to 83C.
When connected to 5A@, the high reference voltage vRm! as shown in Figure 7! ! Fl, and when switching to the resistor 83B side, the above ■□2, lower reference voltage vRIIF! Therefore, when the resistor is switched to □83C@, the reference tlF2 voltage V□□ is lower than the above-mentioned V. Therefore, the point in time at which the output of the operational amplifier 81 is inverted to L level changes depending on the switching of the switch 83D. That is, when resistor 83A is selected, K takes time tLt', when resistor 15B is selected, K takes time 1M, and when resistor 83C is selected, K takes time t,
The relationship ts<tM<tL holds true. Then, the comparison voltage VIN is the reference voltage v8. .

When the voltage reaches %VIN≧, the output of the operational amplifier 81 becomes L.
become the level. When the L level output of the operational amplifier 81 is inverted to the H level by the inverter 84, an H level pulse is generated at the output of the pulse generating circuit 85, and this H level pulse is sent to the OR gate as the light emission stop signal C8. 26. The commutating thyristor 22 is made conductive through the capacitor 25° resistor 24 in a layered manner. When the commutating thyristor 22 is made conductive, the anode e cathode of the main thyristor 27 is reverse biased by the charged commutating capacitor 16, so that the main thyristor 27 becomes non-conductive. Furthermore, when the light emission stop signal C1 rises to H level, the FF circuit 67 is set, so the AND gate 7
1 is opened, and the output pulse of the oscillation circuit 68 is input to the preset counter 72 to start counting. Furthermore, when the light emission stop signal C1 rises to H level, the FF circuit 6
0 is reset, the output of the FF circuit 60 is inverted to L level, the transistor 86 is turned on, and the inverting input terminal of the FF 1810 is forced to the ground level, and the monitor output is The monitor circuit 202 that detects the voltage signal M substantially stops working.

The time U of the above-mentioned light emission interval is determined by the preset counter 72.
When the count corresponding to 2 is completed, the output of the preset counter 72 becomes H level, and accordingly, an H level pulse is generated at the output terminal of the pulse generating circuit 73. This H level pulse is the light emission restart signal B2.
As or gate 31. Capacitor 30. is applied to the gate of the main thyristor 27 via the resistor 29 sequentially,
The main thyristor 27 is made conductive. At this time, since the deionization time has not elapsed since the flash discharge tube 14 last stopped emitting light, the discharge tube 14 resumes emitting light only when the main thyristor 27 is turned on. At the same time, the FF circuit 67 and preset counter 72 are reset. Further, since the light emission restart signal B2 of the H level pulse sets the FF circuit 60 via the OR gate 59,
The output of the FF circuit 60 is inverted to H level, and accordingly, the output of inverter 61 becomes L level, turning off transistor 86. Therefore, the operation of integrating the monitor output voltage M is restarted by the operational amplifier 79 as before.

Further, the H level pulse output from the pulse generating circuit 76 is used as a quick charge signal to the capacitor 21. The voltage is applied to the gate of the thyristor 18 through the resistor 20 in order, making the thyristor 1B conductive. When the thyristor 18 becomes conductive, the line J1 → the anode/cathode of the thyristor 18 → the commutating capacitor 16 → the anode/cathode of the main thyristor 27 - line! . The commutating capacitor 16 is rapidly charged in an extremely short time through the main path. The same capacitor 16
When charging is completed, the current to the thyristor 1B becomes less than the holding current, and the thyristor 18 becomes non-conductive. Then, when the output voltage of the operational amplifier 79, that is, the comparison voltage ■□ exceeds the reference voltage VREF, the output of the operational amplifier 81 is inverted to L level. When the output of the operational amplifier 81 becomes L level, the output of the inverter 84 becomes H level, and the pulse generation circuit 85 sends out the light emission stop signal CI of the H level pulse in the same manner as before. Similarly, since the light emission restart signal B2+quick charge signal 1 sequentially becomes an H level pulse, the light emission waveform in the flash discharge tube 14 becomes a continuous pulse. The light emission intensity of this continuous pulsed light emission can be adjusted by switching the switch 83D of the resistance switching circuit 83 in the monitor circuit section 202.
Pulse train P1 shown in the figure. P2. It changes like P3.

Then, the preset counter 64 determines the total light emission time U.
When the count corresponding to , is completed, the FF circuit 65 is set and the output of the FF circuit 65 is inverted to H level, so that when the light emission stop signal C1 of the H level pulse is generated thereafter, this The light emission stop signal C8 at this time is obtained as a reset signal RESET through the AND gate 66. When the reset signal RESET is generated, the reset signal RESET is sent to the FF circuit 62. Preset counter 64. The FF circuit 65 is reset, and all other circuits are also reset to complete the series of dynamic flat light emission operations.

In addition, in the above-mentioned "flat emission mode",
The movable contact terminal of the switch 44 is the first fixed terminal 4.
By switching 4A to crocodile, AND gate 4
One input terminal of the AND gate 45 is at L level, and even if the AND gate 45 is closed and the flash light emission start signal 3:2 is inputted to the camera, the pulse generation circuit 4
Circuits after 6 are not affected in any way. Along with this, since the output of the inverter 4 is at H level, the transistor 50 is always turned on, and there is no possibility that the light emission stop signal C2 to stop the light emission is outputted from the photometry circuit section 203.

Next, the operation of the "flash light emission mode" will be explained using FIG. 10.11. When the movable contact terminal of the AND gate 44 is switched to the second fixed terminal 44B and the "flash emission mode" is selected, the strobe device of this embodiment Since the input terminal becomes L level, the AND gate 40 is closed and the flat light emission start signal x1 is no longer accepted, and the other input terminal of the AND gate 45 becomes H level, so the AND gate 45 opens and flashes. The light emission start signal x2 is now accepted.

That is, when the camera is recognized and the flash light emission start signal x2 is input, the output of the AND gate 45 becomes H level, an H level pulse is generated in the pulse generating circuit 46, and this H level pulse is transmitted through the OR gate 42 to emit light. As a trigger signal, the trigger thyristor 10 is made conductive through the capacitor 6 and the resistor 12.

In addition, the OR gate 31.1 is used as the 1 light emission start signal B. Capacitor 30. The main resistor 27 is made conductive via the resistor 29. Therefore, the charge accumulated in the main capacitor 3 is discharged through the flash discharge tube 14 and the main thyristor 27, and the flash discharge tube 14 starts emitting flash light. In addition, the FF
The circuit 47 is set, the output of the FF circuit 47 is inverted to H level, and the transistor 50 whose base is set to L level through the inverter 48 and resistor 40 is turned off. Therefore, the photocurrent generated in the phototransistor 53 is integrated by the capacitor 55, and the photometry circuit section 203 starts photometry.

〒 Then, in the photometry circuit section 206, the capacitor 5
When the integrated voltage of 5 exceeds the reference voltage which is the connection point voltage of resistor 51.52, the output of operational amplifier 56 is inverted to L level, the output of inverter 57 becomes H level, and the output terminal of pulse generating circuit 58 is inverted to L level. A high-level pulse from the OR gate 26, the capacitor 25. The thyristor 22 is made conductive via the resistor 24.

From this K, the main thyristor 27 becomes non-conductive and light emission is stopped in the same way as the operation in the above-described "flat light emission mode" K. Therefore, the strobe device of this embodiment is
Mode selection switch 440 Flexible contact terminal is fixed terminal 44
When switched to B, it functions as a normal auto strobe device.

In this embodiment, the operational amplifier 810 reference voltage Vivr is changed to the effective guide number GNe by the resistance switching circuit 83 to 5. ．． As shown in FIG. 12, the resistance switching circuit 83 is replaced with a fixed resistance 183, and the capacitor 80
It is also possible to replace b0 with the capacitance switching circuit 80'.b0 The same capacitance switching circuit 80' is l5O100, shutter time value i00
A capacitor 80A having a capacitance corresponding to an effective guide number QNe of 11 when the effective guide number QNe is 0, and an effective guide number G
Ne has a capacity corresponding to 8;
Effective guide number〇Ne is 5.6 Connect one end of each capacitor 80C in common with a capacitor 80C having a capacitance corresponding to the IC, and connect each capacitor 80A, 80B, 8
The other end of 0C is connected to each fixed contact terminal of a three-stage changeover switch 80D, and the movable contact terminal of the switch 80D is grounded. Also, capacitor 80A,
The common connection end of each of 80B and 80C is connected to the collector of the same transistor 86 as described above, and the ground end is
It is connected to the emitter of the same transistor 86.

Therefore, when the switch 80D is connected to the capacitor 80A whose effective guide number GNe is 11, the monitor voltage signal M corresponding to the charging voltage of the main capacitor 3 is non-invertingly amplified by the operational amplifier 76 as described above. An integrating operation is performed by an integrating circuit formed by a resistor 79 and a capacitor 80A, and the comparison voltage vXN reaches the reference voltage VRI+F in time 1L as shown in FIG. Similarly, when the capacitor 80B is connected to the switch 80D, the time is 1M, and when the capacitor 80C is connected to the switch 80D, the time is 1s, resulting in 1. <1M<1L. Therefore, capacitor 8
By switching 0A, 80B, and 80C, the light emission time can be changed in the same manner as described above, and the amount of light can be obtained according to the effective guide number GNe.

Further, as a second embodiment of the present invention, as shown in FIG. 14, the control circuit 200' uses a fixed capacitor 80 and a fixed resistor 83' in the monitor circuit section 202', and the light emission interval setting circuit In the section 201', the amount of light emission, that is, the effective guide number QNe may be switched. That is, the light emission interval setting circuit section 20 in FIG.
1', the output terminal of the FF circuit 67 is connected to the inverter 8.
9. It is connected to the base of an NPN switching transistor 910 via a resistor 90 in sequence. A series circuit including a constant current circuit 92 and an integrating capacitor 93 is connected between the end to which the positive power source I+B is supplied and the ground end. A transistor 91 is connected to both ends of the capacitor 93.
The corefter and emitter of are connected to each other. The connection point between the constant current circuit 92 and the capacitor 93 is connected to the inverting input terminal of an operating circuit 1940 forming a voltage comparison circuit. A series circuit of a resistor 95 and a resistance switching circuit 83' is connected between the end to which the positive electric atoms B are supplied and the grounding end, and the connection point between the resistor 95 and the resistance switching circuit 83' is an operational amplifier 94. is connected to the non-inverting input terminal of The output terminal of the operational amplifier 94 is connected to the input terminal of the pulse generation circuit 73 via an inverter 96.

The resistance switching circuit 83' consists of resistors 83A' to 86C' and a changeover switch 83D'.
3 (see FIG. 5).

Therefore, in the dynamic flat light emitting strobe device of the third embodiment using the control circuit 200',
Dynamic flat light emission mode”, switch 83
D' is a resistor 83 corresponding to the effective guide number GNe of 8.
When B'K is connected, the light emission trigger signal 1, the light emission start signal BsA, and the light emission stop signal C0 are sequentially generated as shown in FIG. 15, similar to the operation in the first embodiment. Then, when a pulse of the light emission stop signal C5KH level is generated, the FF circuit 67 is set, the transistor 91 is accordingly turned off, and the constant current circuit 92 starts charging the capacitor 93. The charging voltage at this time is inputted to the inverting input terminal of the operational amplifier 94 as the comparative human power vXN, and the operational amplifier 94 compares it with the voltage divided by the resistor 95 and the resistor 83B/, that is, the reference voltage V□F2°. And time 1 = 1. . Afterwards, the output of the operational amplifier 94 is inverted to the L level, the output of the inverter 96 becomes the H level, and the light emission restart signal B2 and the quick charge signal are sent out from the output terminal of the pulse generation circuit 75, and as in the first embodiment described above, Similarly, a light emission restart operation and a quick charging operation are performed. Thereafter, the above operation is repeated in the same manner.

On the other hand, switch 83D' is set to the effective guide number QNe.
When connected to the resistor 850' corresponding to No. 11, the reference voltage vRJCFIO becomes lower than the previous reference voltages vR1 and F1° as shown in FIG.
The time t from the generation of the 1tlcH level pulse to the generation of the light emission restart signal B, &CH level pulse is the aforementioned time t. Shorter time t□. becomes.

Therefore, when the switch 83D' is connected to the resistor 83C', continuous pulsed light emission with short emission intervals can be obtained.

Also, if the switch 83D' is connected to the resistor 83A'K corresponding to the effective guide number GNe of 5.6K, the reference voltage vR F3° will be higher than the previous reference voltage vRKF2° in the same way as above. Continuous pulsed light emission with intervals having a time t3° longer than the previous time t2° is obtained.

In the control circuit 400 shown in FIG. 14, the circuit between the OFF circuit 67 in the light emission interval setting circuit section 201' and the pulse generation circuit 73 is replaced by the circuit shown in FIG. 17, that is, the circuit shown in FIG. Some of them may be replaced with similar circuits. In this case, the preset data Za input to the preset counter 72 changes according to the effective guide number. As a result, the effective guide number GNe
As a result, the interval of pulsed light emission changes.

Next, a third embodiment of the present invention will be described using FIGS. 18 to 22. Similarly to the first embodiment, this embodiment also has the following:
It is configured to have two functions: a ``dynamic flat light emission mode'' and a ``flash light emission mode.'' First, the configuration of the main circuit 300 will be explained. This main circuit 300 is the same as the main circuit 100 (see FIG. 4) in the first embodiment except for some elements, so similar elements have the same reference numerals as shown in FIG. 4. The detailed explanation will be omitted.

Between the electrode of the flash discharge tube 14 and the line 13o, there is a normally-on silent Ws conductive (SI type) thyristor 3.
The gate of the thyristor 32 is connected to the connection point between the commutating capacitor 16 and the resistor 17. Further, the cathode of a thyristor 33 is connected to the gate of the thyristor 32, the anode of the thyristor 33 is connected to the line-goVC, and a resistor 34 is connected between the gate and the cathode of zero voltage. The gate of the thyristor 33 is a resistor 35 and a capacitor 3.
The light emission restart signal E is sequentially supplied through 6 and 6.

The main circuit 3001c configured in this manner is connected to a control circuit 400 having a circuit configuration as shown in FIG. The control circuit 400 includes a light emission interval setting circuit section 401, a monitor circuit section 402, and a photometry circuit section 403.
In addition, since only some of the elements of the control circuit 200 in the first embodiment are changed and the others are the same, similar elements are given the same reference numerals as those shown in the 51st AJC, and detailed explanation thereof will be omitted. .

Pulse generation circuit 7 forming light emission interval setting circuit section 401
A light emission stop signal E is sent from the output terminal of the pulse generating circuit 73, and the output terminal of the pulse generating circuit 73 receives a delay time τ.
The output terminal of the delay circuit 74 is connected to the input terminal of the delay circuit 74, and a quick charging signal is sent from the output terminal of the delay circuit 74. The monitor circuit section 402 is configured as follows.

1. The anode of the light-receiving diode 101 installed in a hole formed in a part of a reflector (not shown) for irradiating the light emitted from the flash discharge tube forward is grounded and forms an integrating circuit. It is connected to the non-inverting input terminal of the operational amplifier 102, and the cathode of the photodiode 1010 is connected to the inverting input terminal of the operational amplifier 102. An integrating capacitor 103 is connected between the inverting input terminal and the output terminal of the operational amplifier 102, and the output terminal of the operational amplifier 102 is connected to the operational amplifier 8.
It is connected to the inverting input terminal of 1.

A series circuit consisting of a resistor 104 and a resistor switching circuit 86' is connected between the supply end of the positive atoms B and the ground end. The connection point between the resistor 104 and the resistance switching circuit 83 is the operational amplifier 8.
The resistance switching circuit 83" is connected to the non-inverting input terminal of 1 and is set to 5 so that the reference voltage VREF supplied to the input terminal is varied.
a resistor 83A' having a resistance value corresponding to 11, a resistor 83B# having a resistance value corresponding to an effective guide number GNe of 8, and a resistor 83C' having a resistance value corresponding to an effective guide number GNe of 54.6. and a switch 85D'' for switching these resistors 83A'', 83B'', and 83C#.

Next, the operation of the dynamic type flat light emitting system of the third embodiment configured as described above will be explained.

First, the operation of the "dynamic 7-rat flash mode" will be explained using FIGS. 20 and 21. In the case of this "flat flash mode", the mode selector switch 4
Since the movable contact terminal No. 4 is switched to the first identification contact terminal 44A side, the positive atom B is supplied to the input end of the AND gate 40, and the AND gate 40 is opened. Since the level output is supplied to the input terminal of the AND gate 45, the AND gate 45 is in a closed state.

Therefore, the input of the 7:7 light emission start signal a:1 is allowed when the camera body is not connected, and the input of the flash light emission start signal x2 is no longer allowed. When the flat light emission start signal x1 is input, the trigger thyristor 10 is made conductive by the light emission trigger signal A from the output terminal of the OR gate 42, as in the case of the previous embodiment, and the flash discharge tube 1
4 becomes excited. Then, the charges stored in the main capacitor 3 are discharged through the excited flash discharge tube 14 and the anode/cathode of the main thyristor 32, and the flash discharge W14 starts to emit flash light. Furthermore, 60 is set at the same time, and the output of the same FFU path 60 becomes H level, so this H level output is sent to the inverter 61.
is inverted to L level, thereby turning off the transistor 94 and entering a state in which the integrating operation of the monitor circuit section 402 is started.

Furthermore, since the FF circuit 62 is cassetted by the H level one-shot pulse output from the pulse generating circuit 41, the output of the PF circuit 62 is inverted to H level, and the AND gate 63 is accordingly opened. , the output pulses of the oscillation circuit 68 are input to the preset counter 64 and counting is started.

In this way, the flash discharge tube 140 is activated by the light emission trigger signal A.
When light emission starts, the light emission is received by the light receiving diode 101, and the capacitor 103 is charged with a current flowing through the light receiving diode 101 according to the intensity of the received light. The output of the operational amplifier 102, that is, the integrated voltage of the capacitor 105, is supplied to the inverting input terminal of the operational amplifier 810 as a comparison voltage viN, and is compared with a reference voltage vR set by the resistor 104 and the resistance switching circuit 83C. ℃, this comparison voltage vXN is the reference voltage v
When the voltage exceeds RICF, the output of the operational amplifier 81 is inverted to L level. When the output of the operational amplifier 81 becomes L level, this L level output is inverted to H level by the inverter 84, and an H level pulse is generated at the output of the pulse generation circuit 85. Orgate 26 as C8. capacitor 25
゜The commutating thyristor 22 is made conductive via the resistor 24 in sequence. When the commutating thyristor 22 becomes conductive, the charged charge of the commutating capacitor 16 is transferred to the commutating capacitor 16.
→ 7-node cathode of commutating thyristor 22 → resistor 17
Discharge occurs along the path of Then, since the gate and cathode of the main thyristor 32 are reverse biased at this time, the main thyristor 32 instantly becomes non-conductive and stops emitting light. It should be noted that since the flash discharge tube 14 has a deionization time, it is necessary to keep the flash discharge tube 14 in a reverse bias state during this deionization time. Therefore, it is necessary to set the time constant determined by the commutating capacitor 16, the resistor 17, and k to be longer than the above deionization time.

Further, when the light emission stop signal C rises to the H level, the FF circuit 67 is set, the AND gate 71 is opened, and the output pulse of the oscillation circuit 68 is input to the preset counter 72 to start counting. In addition, the light emission stop signal CI
Since the FF circuit 60 is reset when k rises to the H level, the output of the FF circuit 60 is inverted to the L level, and accordingly, the transistor 106 is turned on, and the charge charged in the capacitor 103 is is discharged, and the monitor circuit section 402 that detects the amount of light emission substantially stops working.

Preset counter 7211'2: Therefore, when the count corresponding to the time U of the light emission interval is completed, the output of the reset counter 72 becomes H level, and accordingly, the output terminal of the pulse generation circuit 73 An H level pulse is generated. This H level pulse is passed through the capacitor 3 and the resistor 35 in sequence as the light emission restart signal E.
It is applied to the gate of thyristor 63.

Therefore, the thyristor 33 becomes conductive and both ends of the resistor 17 are short-circuited, so that the charge stored in the commutating capacitor 16 is transferred from the anode/cathode of the commutating thyristor 22 to the resistor 1.
Since the discharge path changes from the discharge path No. 7 to the anode/cathode path of the commutating thyristor 22 to the anode/cathode of the thyristor 33, the gate potential of the main thyristor 32 becomes approximately the ground potential, and the main thyristor 32 becomes conductive. do. When the main thyristor 32 becomes conductive in this manner, the flash discharge tube 14, which has not elapsed the deionization time since the previous stop of light emission, resumes light emission. At the same time, the FF circuit 67 and preset counter 72 are reset. In addition, the light emission restart signal E of the H level pulse
sets the FF circuit 60 via the OR gate 59, so the output of the FF circuit 60 is inverted to the H level, and accordingly, the output of the inverter 61 becomes the L level, turning off the transistor 94. Therefore, the integration operation of the monitor output voltage M in this monitor circuit f11402 is restarted.

The light emission restart signal E is delayed by a time τ by a delay circuit 74, and is used as a high-level pulse rapid charging signal for the capacitor 21. The commutating capacitor 16 is rapidly charged in an extremely short time through the main path of the resistor 20 in sequence from 16 to the gate/cathode of the main thyristor 32 to the line type @. When the charging of the capacitor 16 is completed, the current to the thyristor 18 becomes lower than the holding current, and the thyristor 1
8 becomes non-conductive.

Then, when the integrated voltage by the resistor 92 and the capacitor 96, that is, the comparison voltage vXN exceeds the reference voltage vREF, the output of the operational amplifier 81 is inverted to L level. When the output of the operational amplifier 81 becomes L level, the output of the inverter 84 becomes H level, and the pulse generation stop signal C0 of H level pulse is sent from the pulse generating circuit 85 as before. Thereafter, in the same manner, the 1-light emission restart signal E and the quick charge signal become H-level pulses, so that the light emission in the flash discharge tube 14 becomes a continuous pulse.

Then, the preset counter 64 determines the total light emission time U.
When the count corresponding to 2 is completed, the FF circuit 65 is set, and the output of the FF circuit 65 is inverted to H level, and after this, that is, when time U2/ has elapsed from the start of light emission, the FF circuit 65 is set. When the light emission stop signal CI of pulse level is obtained, the signal C1 is passed through the AND gate 66 as a reset signal RESET to the FF circuit 62. Preset counter 64. The FF circuit 65 is reset, all other circuits are reset, and a series of dynamic type 72-bit light emission operations are completed.

Next, the movable contact terminal of the mode changeover switch 44 is switched to the second fixed terminal 44B to select the "flash light emission mode".
When this is selected, the operation is similar to that of the "flash light emission mode" in the first embodiment, so a description thereof will be omitted. However, in this third embodiment, since a normally-on thyristor 32 is used, the 22nd
Comparing the 70-chart in the figure with the 70-chart in Fig. 11 above, it is clear that the 1 above "flat emission mode"
As in the case of , the light emission start signal B1 is not required.

A specific example of the light amount switching member for manually operating the effective guide number switching switch in each of the above embodiments will be described below with reference to FIGS. 23 to 27.

Main body 301 of dynamic flat light emitting strobe device
A mounting screw hole 302 is drilled in k, and an arc-shaped guide elongated hole 503 is formed around the mounting screw hole 302.
is drilled. Further, a guide number display section 304 displaying a plurality of effective guide numbers is formed on an arc with a diameter larger than the arc of the guide elongated hole 303, and on the even larger arc there are three stages of rsJ, rMJ, and rLJ. A light amount display section 301a is formed to display the amount of light. Above the main body 301, there is an umbrella-shaped operation section 305 that extends across the main body 301.
A disk-shaped operation plate 307 having a protruding instruction section 306 is placed on a part of the screen. The lower surface of this operation plate 307 protrudes downward and includes effective guide number changeover switches 85D, 80D, 85D/ in each of the above embodiments.
A switch drive pin 308 is formed that engages with 83D# or the like. This switch drive bin 308 is guided into the guide elongated hole 303. The film sensitivity is set near the outer periphery of the upper surface of the concave portion of the operation panel 507.
A film sensitivity display section 309 indicating the O value is formed, and an arc-shaped elongated hole 310 corresponding to the guide number display section 304 is further bored. Above operation panel 3
A film sensitivity setting plate 311 is rotatably disposed within the recess on the upper surface of the film 07.

A film sensitivity setting see-through window 312 is formed in a part of the outer edge of the film sensitivity setting plate 511, and a guide number see-through window 313 is formed to see through a part of the guide number display section 304. It is set up. and,
Along this transparent window 313, there are a plurality of shutter time display sections 3.
11a is formed. Attachment holes 514.31 are provided at the center of each of the operation plate 307 and film sensitivity setting plate 311.
5 is drilled. The operation plate 307 and setting plate 611 are attached to the main body 301 with attachment screws 319. That is, the mounting screw 319 has a stepped portion 316 formed under the collar portion 318 that is connected to the mounting hole! 115,31
4 in this order, and the lowermost screw portion 317 is screwed into the screw hole 302, and from this K, the operation plate 307 and film sensitivity setting plate 611 are attached to the main body 301.
It is rotatable to 1.

Therefore, as shown in FIG. 27, the indicator 306 of the operation panel 307 is set to "M" (medium light) on the light amount display section 301a, and the transparent window 312 of the film sensitivity setting plate 511 is set on the film sensitivity display section 309. When r100JIc is combined, that is, when the film sensitivity is IS 0100,
When the shirt time is '/'1ooo, the effective guide number is 〇N! It is clear that (1) is 8.

In this state, the changeover switch B in the circuit of each of the above embodiments is
5D, 850', 85D', and 80D are each resistors 85B.

83B', 83B', and capacitor 80B are selectively connected. Then, when the operation plate 307 is rotated integrally with the film sensitivity setting plate 311 and the indicator 506 is set to rLJ (fire source 1t-)K, the film sensitivity is ISO100 and the shutter speed is 100 seconds. When the time is '/1000, the effective guide t y /< -GNe
(1) 11 You can see that it is true. Furthermore, similarly,
When the indicator 305 is set to rsJ (low light intensity) FC, the film sensitivity I is 80100. Vyari seconds'/
'1ooo, the effective guide number GNe(1) is 5.
6. In addition.

It is clear that the effective guide number GNe varies depending on the film sensitivity or shutter speed.

For example, as is clear from FIG.
/ 1/, 1/Vc are changed by 500=
It can be seen that when 250 and 125, the effective guide number GNe changes to 11, 16, and 22, respectively. Also, by rotating the film sensitivity setting plate 311 one step clockwise with respect to the operation plate 307, the Ij S value of r 200 J is displayed on the transparent window 312.
When the O value is displayed, when the indicator 306 is set to the cabinet, the shutter speed is 1/. . . The effective guide number GNe is 1111C, and the shutter speed is 115 seconds.
When taking the respective values of 00''/250 and '/125, the effective guide numbers are 16, 22, and 3, respectively.
It is clear that the result is 2.

(Effects of the Invention) As described above, according to the present invention, the on/off control of the flash discharge tube is not performed between the extremely small upper and lower limit values, unlike the conventional static type flat light emitting strobe device. Therefore, the circuit configuration is simplified, and there is no need to use an extremely high-precision voltage comparator circuit, so there is an advantage that the cost can be reduced.

Further, since the pulse emission interval and the pulse emission intensity can be controlled simply by switching resistors or capacitors, there is an advantage that the effective guide number can be easily changed.

Therefore, it is possible to provide a dynamic-type flat light-emitting device which is extremely convenient to use and eliminates the conventional drawbacks mentioned at the beginning of the specification.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the light emission intensity characteristics of a conventional electronic flash device and the dynamic flat light emitting flash device of the present invention. A diagram showing the relationship between the light emission interval in the strobe device fK and the slit width of the 7-ocal plane shutter. Figure 3 shows the dynamic flat light emitting system of the present invention)
FIG. 4 is a diagram showing the exposure unevenness in a 7-ocal plane shutter when a flash device is used; FIG. 5 is an electric circuit diagram showing a control circuit connected to the main circuit shown in FIG. 4 above, and FIG. 6 is a signal waveform diagram for explaining the operation of the control circuit shown in FIG. 5 above. , FIG. 7 and FIG. 8 are diagrams for explaining the operation of the "flat light emission mode" in the dynamic type flat light emission strobe device of the first embodiment of the present invention shown in FIGS. 4 and 5 above, FIG. 9 is a 7 μm chart showing the operation of the "flat light emitting diode" in the strobe device of the first embodiment, and FIG.
Each signal waveform diagram for explaining the operation of "flash light emission mode". FIG. 11 shows "
FIG. 12 is a flowchart showing the operation of the "flash emission mode"; FIG. 12 is an electric circuit diagram showing another example of the flash interval setting circuit section in the control circuit of the strobe device shown in FIG. 5; FIG. FIG. 12 is a diagram for explaining the operation of the light emission interval setting circuit section; FIG. 14 is an electric circuit diagram of a control circuit of a dynamic flat light emission strobe device showing a second embodiment of the present invention; The figures are signal waveform diagrams for explaining the operation of the control circuit shown in Fig. 14 above, Fig. 16 is a diagram for explaining the operation of the control circuit shown in Fig. 14 above, and Fig. 17 18 is an electric circuit diagram showing a partial modification of the light emission interval setting circuit section in the control circuit shown in FIG. 19 is an electric circuit diagram showing a control circuit connected to the main circuit shown in FIG. 18 above, and FIG. 20 is an electric circuit diagram of the fourth embodiment of the present invention shown in FIGS. 18 and 19 above. Waveform diagrams, FIGS. 21 and 22, for explaining the operation of the "flat light emitting mode" in the dynamic type flat light emitting strobe p-type flash device i, show the "flat light emitting mode" and FIG. 23 is a plan view showing a part of the main body of the strobe device of the present invention; FIG. 24 is a diagram showing the operation plate attached to the main body of the strobe device. FIG. 25 is a plan view showing an example of a film sensitivity setting plate attached to the operation panel shown in FIG. FIG. 27, an assembled perspective view of the switching member, is a plan view of the light amount switching member shown in FIG. 26. 6...φ・Main capacitor 14... Flash discharge tube 16φ・-φ Commutation capacitor 18... Thyristor (switching element for rapid charging) 22... Commutation thyristor (switching for commutation) elements) 27, 52... Main thyristor (main switching element) 80', 83, 85'
, 85'...Switching circuit (variable means) 100.
500... Main circuit 200.400...Control circuit 201.201', 201'', 401...Light emission interval setting circuit section 202.402...Monitor circuit section Patent application Representative 1st Limbus Optical Industry Co., Ltd.; Representative Fujikawa Nanabu r': 'TQ' Ma 6th ward 7th ward LS LM LL 7III Le 8th ward 9th ward 10th ward also 11 prisoners 12 Ku Ru 13 (□ Ei 16 Zu Ma 17 Senma 21 Ku 323 Ku Arakiho Zu Procedures Amendment (spontaneous) 1. Indication of the incident Patent Application No. 82557 of 1982 2.
Title of the invention Dynamic flat light emitting strobe device 6, relationship to the amended person's case Address of patent applicant 2-43-2 Hatagaya, Shibuya-ku, Tokyo Name Title
(037) Olympus Optical Industry Co., Ltd. 4, Agent
Person 5, “Claims” and “Detailed Description of the Invention” of the specification subject to amendment
Contents of each column and drawing 6 amendment Delete the part after ``koto'' written in page 7, line 18 of the same page, and replace it with the following sentence. "The semiconductor switching element is turned off when the output of the monitor circuit reaches a predetermined level, and the semiconductor switching element is turned on from the time the light emission stops until the deionization time in the flash discharge tube has elapsed. and at least one of the predetermined level and the point at which the semiconductor switching element is turned on is made variable.
Next to “each” in the 7th line from the bottom of page 11, r
o, 1. Join J. (4) “■, no” written in the 6th line from the bottom of page 11 of the same
will be changed to “■′,■′”. (5) "This" written in the 5th line from the bottom of page 11 will be changed to "Based on this, calculate the above formula 〇." B. (6) "This" written in the fourth line from the bottom of page 11 will be changed to the following sentence. "In addition, P in Tables 1 to 3 above is 1024°512
, 256.128. −−−− is '/+ of the nominal exposure time T
These are values corresponding to ooo''1500'/, '/, . 250 125 Tables 1 to 5 (7) Next to "was" written in line 5 on page 12 of the same table, "nominal exposure time T" is added. (8) "Minimum pulse width" written in line 8 of page 12 will be changed to "maximum pulse interval". (9) "Or" written in the second line from the bottom of page 18 of the same (10) "Or" written in line 15 of page 27 of the same is changed to "un". (11) Page 28 of the same, second Next to [2J] written in the line, add "and each of FF circuit 67". (12) Delete the text after "Input end" written in the negative second line of No. 27 to before "Connection" written in the third line of No. 27B. (13) "The output terminal is" stated in page 27, line 15 of the same.
Delete the text after ``Or Gate'' on page 27, line 17 of the same page. (14) The word "stop" written from the end of the second line on page 28 to the beginning of the third line on page 28 has been changed to "start." (15) At the end of the 6th line on page 28 of the same, after “Iteru.”, “
When the preset counter 72 counts up to the count number corresponding to the data x4, it outputs a one-shot pulse and starts counting again. ” will be added. (16) Add the following sentence at the end of the 5th line on page 32 of the same document, after "Sareru." [Also, since the FF circuit M67 is set by the H-level one-shot pulse output from the pulse generation circuit 41, the output of the FF circuit 67 is inverted to H-level, and accordingly, the AND gate 71 is opened. He, oscillation circuit 68
The output pulse is input to the preset counter 72, and counting is started. (17) ``Nari'' written in page 33, line 17 of the same.
Delete the words from ``to'' before ``Also'' written in the 54th purchase first line. (18) Delete the text after "Resume" written in line 12 of page 35 of the same page to before "Also" written in line 14 of the same page. (19) ``179'' stated in the last line of page 35 of the same is replaced with ``7
6". (20) "79" written in page 36, line 12 of the same,
Change it to "76". (21) l-85'J described in page 42, line 10 of the same
will be changed to r 185 J. (22) r89 described in page 42, line 15. Next to J, "one input end and output end of OR gate 89A,"
will join. (23) Add "The other input terminal of the OR gate 89A is connected to the output terminal of the pulse generating circuit 73" to the 6th order of J, as stated in page 42, line 17 of the same page. Masu. (24) Delete the words written in the 3rd line of the same page after ``It occurs.'' written in the 44th purchase first line of the same page up to and before J, and substitute the following sentence. In addition, since FF00M67 is set by the H level overturn signal output from the pulse generation circuit 41, the output of the FF circuit 67 is inverted to H level.
” (25) Add the following sentence after “Reru.” at the end of line 15 on page 44 of the same document. "Also, the output of the pulse generation circuit 73 is output from the OR gate 89.
Turn on transistor 91 via A and resistor 90,
Close the capacitor 93. As a result, the charge in the °C capacitor 93 is discharged, and the potential at the inverting input terminal of the operational amplifier 94 becomes higher than the potential at the non-inverting input terminal, so that the output of the operational amplifier 94 is inverted from the L level to the H level. The pulse width of the pulse generating circuit 73 is set to a time width sufficient to discharge the charge in the capacitor 93 through the transistor 91, but when the H level pulse of the pulse generating circuit 73 disappears and becomes the L level, the L level becomes At the output, the transistor 91 is turned off again and charging of the capacitor 93 is started. (26) From the end of the 19th line of page 44 to the beginning of the last line of the same page k
"Light emission stop signal CI" written above is changed to [Light emission restart signal B, J. (27) r 400 written on page 45, line 12 of the same.
J is changed to ``200IJK.'' (28) ``From'' written in line 11 on page 47 of the same is changed to ``is connected to the reset terminals of the FF circuit 67 and preset counter 72, and the main Changed to "Circuit 300". (29) In the same page 47, line 15, next to "I'm here.", there is a statement that says "Also, the input terminal of the FF circuit 67 is connected to the pulse generating circuit 8.
5 is connected to the output terminal of Nζ and the FF circuit 60,
It is connected to the set end. ” will be added. (30) Same 50th! "94" written in the 9th line. It will be changed to "106". (31) Delete the part after “Therefore” written in line 16 of the same page @ line 17 of the same page, and before the “corresponding to ko” written in line 17 of the same page, and [time U, J corresponding to data x4] (32) Replace “94” written in the last line of page 53 with r1
It will be changed to 06J. (33) “Resistance 9” written in line 8 from the bottom of page 54 of the same
2 and capacitor 93" to "light receiving diode 101° capacitor 103. operational amplifier 102". (54) "U2" written in the 4th line of page 55 of the same
Changed to UI J. (55) “U, /co” written in line 7 on page 55 of the same
rtrt'JK will be changed. (36) Figures 5, 6, and 9 in the drawings attached to the application
Figures 14, 15, and 20 have been revised as shown in the attached drawings. Attachment 2 claims connection circuit; manual setting means for varying at least one of the predetermined level of and the time point at which the light emission restart signal is generated;

Claims (1)

[Claims] A main switching element connected in series to a flash discharge tube. A series circuit of switching elements connected to the main capacitor at both ends for quick charging and commutation of the commutating capacitor, a series circuit of the flash discharge tube and the main switching element, and a series circuit of the switching elements for quick charging and commutation of the commutating capacitor; A commutation capacitor is inserted between the switching element and the series circuit of the commutation switching element, a monitor circuit detects the amount of light from the flash discharge tube, and the output voltage of this monitor circuit reaches a predetermined level. Then, a light emission stop signal is generated to close the commutation switching element and open the main switching element, and the operation is started by this light emission stop signal, and the deionization time in the flash discharge tube is increased. a control circuit that generates a light emission restart signal to close the main switching element again after a shorter predetermined time and also generates a quick charge signal to close the quick charge switching element; the predetermined level for generating a light emission stop signal;
and means for varying at least one of the predetermined time period for generating the light emission restart signal, and the light emission stop signal, the light emission restart signal, and the quick charge signal are transmitted during non-light operation of the shutter in the camera. 1. A dynamic flat light emitting strobe device, characterized in that the flash discharge tube is made to repeatedly emit pulsed light by causing the flash discharge tube to repeatedly emit pulsed light.