JPS602921A - Multiprogram controller of camera - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-program control device for a camera having a program mode suitable for self-timer photography.

In recent years, with the rapid development of electronic devices, electronic cameras have been developed, and multi-program automatic exposure cameras incorporating a wide variety of program diagrams have been devised.

Multi-program automatic wJ exposure control cameras are programmed with camera shake and image effects in mind, and those that take image effects into consideration include those that give priority to open aperture, those that give priority to small aperture υ, and those that give priority to high shutter speeds. priority,
There are also low-speed shutters and time-prioritized ones. Also, self-timers are widely used, even by beginners, and in particular, regular self-timers (excluding 2-second self-timers used for copying, etc.) should be used to take commemorative photos of 2 to 10 people in consideration of the size of the pack. Most of the time, it is used by squeezing it tightly. But a multi-program automatic exposure system with a conventional self-timer device? When performing self-timer shooting with a III camera, exposure control is performed using the exposure control mode set before the self-timer is set, and when performing self-timer shooting with image effects taken into consideration, a small aperture is used. It was not favorable except for.

The present invention has been made in view of the above-mentioned circumstances, and is provided with a program mode circuit dedicated to the self-timer in consideration of image effects in a multi-gram control camera that can be switched to each FFI exposure control mode, and a program mode circuit dedicated to the self-timer that takes image effects into consideration. It is an object of the present invention to provide a multi-program control device for a camera that performs photography in a program mode dedicated to the self-timer based on a signal from a wand and a mode switching circuit when photography is set.

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows a multi-mode automatic exposure camera from above. 1 is the camera body, 2 is a lens body that can be attached to and detached from the camera body 1, 3 is a release button, and 4 is an electrically transparent control panel such as a liquid crystal. 5 is an exposure control mode selection button which is a switch for changing the exposure control mode, and 6 is a photometry button used when photometry is desired.

Figure 2 shows the program line of the multi-mode automatic exposure camera shown in Figure 1, and the vertical axis represents the aperture value (FN).
O), horizontal axis is shutter time (T), diagonal axis is F
iV value (ASA 100 K OK 7y LV (i6
．． ) Show. A and B are program lines dedicated to self-timer photography, which make it possible to widen the range of slow shutter speeds compared to normal shutter speeds by fixing the camera on a tripod or the like.

A indicates a normally used 10-second self-time mode (hereinafter referred to as 10-second self-time mode). For EV 20 to 8, shutter time T = 4, aperture value F-2 and shutter time 'I' = 5j@, aperture value F = 2.8 (7)
A straight line connecting two points, KV = 8 to 12 takes into account the blur caused by subject movement, shutter speed is T-54, pattern value F = = 2.8 to 11, and EV = 12 to 19 is an image effect. Taking into account the following, a straight line is programmed to connect the two points of shutter time T = cloudy, fog value F = 11, and shutter time T = '%ouo, and fog value F = 22.

B is used as a substitute for a cable release for copying etc. 2
This shows the second self mode (hereinafter referred to as 2 second self mode). BV == From Q to 5, shutter time T = 4, aperture υ value? :=2~11, gv=s~17
``!, then, considering the image effect, the shutter speed T = 4~
Nameooo' Aperture value F=11. FiV=17-19-
1, shutter time T - A + oo, print value F = 1
It is programmed as 1-22. C indicates a standard program mode (hereinafter referred to as normal program mode) in which the frequently used shutter speed and aperture value are adjusted. my = o to 5, shutter time T = 4 to 3A %k value F = 2, EV, =
5 to 191, shutter speed T-c, aperture value F==2
It is programmed as a line ii'f connecting two points: , shutter time T -Aooo , and fringe value F-22. D
uses gv = o to 13 as aperture priority mode (hereinafter referred to as gradient mode) in which the depth of focus is shallow using the aperture on the open side, and F! From V==il to 19, shutter speed priority mode using high-speed shutter speed (
(hereinafter referred to as stop motion mode),
In this example, EV=0 to 12 is the aperture value? ==2, shutter time T=4~'Ao mouth o, correction=1
3 to 19, shutter time T = 'Aooo,
N Jl value? It is programmed as ==2-22. E is shutter speed priority mode (EV = 5 to 14) used for panning shots 9 etc. using low shutter speeds.
(hereinafter referred to as panning shot mode),
BV: In this example, the aperture priority mode (hereinafter referred to as pan focus mode) in which the aperture of the L lens is stopped down to deepen the depth of focus from 12 to 19 and L7 is used, and in this example, HV == 0 to 6.
Up to aperture value F = 2, shutter speed T = 4 to 3
4, KV = = IS ~ 15, shutter time T = brother, teaching value F - 2 ~ 22, gv = 15 ~ 19, M value F =
22, Shutter time T2~Zoooo is programmed as 2.

FIG. 3 specifically shows the exposure control mode display section 4 shown in FIG.
Second set/I/7 mode, 4c is normal program mode, 4d is gradient mode, 4a2tf stop motion mode, 4e1 is panning shot mode, 4
e2 is a pictograph and a symbol each representing a pan focus mode.

Below, the camera programmed as above shows the opening pattern F.
= 2, minimum number F = 22 lens attached and AHA sensitivity 1
The case where a 00 film is inserted and photographed will be explained. Note that the focal length of the lens is approximately 50 mm.

When the main switch (not shown) is turned on, a 4C pictograph appears on the exposure control mode display section 4.

When the exposure control mode selection button 5 is pressed once, 482 appears on the exposure control mode display section 4 and 4C disappears, indicating that the exposure control mode has been switched from the normal program mode to the pan focus mode. Next, when you press the exposure control mode selection button 5 again, 4e2 disappears and aa2
A pictograph will appear, indicating that the pan focus mode has been switched to stop motion mode. Similarly, when the exposure control mode selection button 5 is pressed in sequence, the exposure control mode is sequentially switched to panning shot mode, gradient mode, 2 second self mode, 10 second self mode, and normal program mode, and the exposure control mode display section 4 pictographs are also sequentially 4e1, 4d1, 4b,
4a and 4c appear to display the exposure control mode. Further, when the exposure control button is pressed all the time, the exposure control mode and the exposure control mode display are sequentially switched in correspondence with each other.

Next, when photographing in each mode, when the desired exposure cannot be obtained in the setting mode depending on the brightness of the subject, each exposure control mode display section 4 blinks to notify the photographer.

Figure 4 shows the control circuit of the camera shown in Figure 1.
SW is a switch that is opened and closed by the selection button 5 shown in FIG. 11 is a selection signal generation circuit that sequentially outputs signals IN1 to N7 each time the switch sw1 is opened and closed;
12 is a normal program display drive circuit operated by signal 1N1; 15 is a pan focus program display drive circuit operated by signal 1N2; 14 is a stop motion program display drive circuit operated by signal INS; 15 is a stop motion program display drive circuit operated by signal INS; 16 is a gradient mode program display drive circuit operated by signal IN4; 17 is a vanning shot mode program display drive circuit operated by signal 1N5;
18 is a 10-second self-mode program display circuit that is activated by the signal IN, 19 is a photometry circuit, and the output of this side light circuit 19 is an arithmetic amplification circuit. gv via vessel OF, o
Outputs a value signal. This gv value signal is applied to the normal program display drive circuit 12. 20 is a normal program line selection circuit operated by signal crab N1; 21 is a pan focus program line and panning shot program line selection circuit operated by signal crab N2 or IN5; 22 is a circuit operated by signal IN or IN5.
23 is a 2-second self-mode program line selection circuit activated by signal N6, and 24 is a 10-second self-mode program line selection circuit activated by signal 1N7. It appears. 25 is a limiter circuit to which each output of the selection circuits 20 to 24 is applied; this limiter circuit 25
The output of the FF and FI value AY signals are outputted through the output multiplier 0P28 and are also applied to the aperture control circuit 26. The AV signal is applied to display drive circuits 13 and 15. 27 is a subtraction circuit in which the output of the photometry circuit 19 is subtracted from the output of the limiter circuit 25; 28 is a limiter circuit to which the output of the subtraction circuit 27 is added; this limiter circuit 2;
The output of 8 is transmitted through the operational amplifier 0P29 to the output of n4 seconds TV.
It outputs a signal and is applied to the shutter control circuit 29. The TV signal is applied to display drive circuits 14 and 16. 50 is a timer circuit to which Shinkani N6 and IN are added, 31 is a switch 8W2 or a timer circuit 50 and Shinkani N6. The output of this release drive circuit 31 is driven by the transistor TR.
1 to pivotally control the electromagnet Mf1.

Thus, each time the switch 8W is closed, the selection signal generation circuit 11 sequentially outputs the signals IN, .about.IN. For example, when the signal 1N1 is output, the normal program line:11 selection circuit 20 is activated, and the photometry circuit 19 is activated.
The output is applied to the 2-1 selection circuit 20, and an AV value calculation signal along the program line of the normalization program is output. This calculated signal is limited by a limiter circuit 25 so that the aperture value falls within a set range.
This output is sent to the edge control circuit 2 via the operational amplifier 0P28.
Added to 6.

On the other hand, 1: In the circuit 27, the soft υ value from the limiter circuit 25 is subtracted from the output of the photometric circuit 19 to output the TV value, and the limiter circuit is used to adjust the TV value multiplication signal so that the HD value falls within the set range. A limiter is applied, and this output is 1λ
The signal is applied to the shutter control circuit 29 via an amplifier 0P29.

When the switch sw2 is closed by operating the release button 6, the release control circuit 31 is activated, the transistor TR is turned on, the 1jJ magnet Mfj is excited, and the release operation is started.

Figures 5 and 6 specifically show Section 4 I.
In the photometric circuit 11 shown in Fig. 5, CLKl is an oscillator that outputs a signal repeating a NO level and a low level in one fixed period, and osl is an oscillator that applies nine high-level rising signals to the S input terminal according to switch SW1. This is a one-shot multi-noise ibrator that outputs one pulse of no-level signal every time the signal is turned on. AND 1 is an and gate, OR
1 is the or gate. FFI to FF7 are D-type flip-flops, and PUC is a power-up clear circuit, which outputs one pulse when the 'ii TJ'A pitcher switch (not shown) is turned on from OFF. Power up clear circuit P
The output of UC is applied to the set input terminal S of the flip-flop FF1 and the reset input terminal R of the flip-flops 1rF2 to FF7.

In the normal program drive display circuit 12, NF2
is a display circuit for lighting the display of pictograph 4C in FIG. AND2 and AND3 are AND gates, OR2 is an OR gate, and OMPI.

CMP2 is a comparator. Comparator OMP1
A voltage corresponding to the exposure amount EV value is applied to the inverting input terminal of the comparator 0) and the non-inverting input terminal of the comparator 0) AP2.

In addition, the output voltage from the constant voltage source Vi9 is applied to the non-inverting input terminal of the comparator (!MP1), and the comparator O
The output voltage from the constant voltage source vO is applied to the inverting input terminal of MP2. The constant voltage source V19 outputs a voltage corresponding to the FfV value 19, and the constant voltage source vO outputs a voltage corresponding to KVVO2. 0LK2 is an oscillator that outputs a high-level and low-level fAD return signal at one fixed period, and its output is input to one of the input terminals of OR2.

In the pan focus program 2 Bb display circuit 16, PN2 is a display circuit for lighting the display of the pictograph 4e2 in FIG. AND4 and AND
5 is an AND gate, and OR3 is an OR gate. OMP
3 is a comparator, and this comparator OMF! A voltage corresponding to the aperture υAV value is applied to the non-inverting input terminal of i. The constant voltage αV16 is a constant voltage source that outputs a voltage corresponding to the AV value of F16, and the output voltage is output from the comparator O.
Input to the inverting input terminal of MP3. CLK3 is an oscillator that outputs a no-y level and a low level in one fixed cycle, and its output is input to one of the input terminals of the OR game FOR5.

Stop motion mode program drive display circuit 14
8M2 is a display circuit for lighting the display of pictograph 4 (12) in FIG. 6. A, ND6 and AND7 are AND gates, and OR4 is an OR gate. OMP4 is a comparator, and this comparator
A voltage corresponding to the TV value of the shutter speed is applied to the non-inverting input terminal No. 4.

v500 is shutter speed%. Outputs the voltage corresponding to the TV value at 0 seconds. It is a constant voltage circuit, and its output voltage is applied to the inverting input terminal of comparator OMP4. 0LK4
is an oscillator that outputs a high level and a low level in one fixed period, and its output is input to one end of the input terminal of the OR gate OR4.

Gladito mode program! In the fA@ display circuit 15, 0M2 is a display circuit for lighting up the display of the pictograph 4d in FIG. AND13 and AN
D9 is an AND gate, and OR5 is an OR gate. OM
P5 is a comparator, and a 'td voltage corresponding to the soft AV value is applied to the inverting input terminal of this comparator OMP50. 2.8 is a constant pressure circuit 11 that outputs a voltage corresponding to the AV value of the pattern JF2.8, and its output pressure is input to the non-inverting input terminal of the comparator at and ζP5. C
LK5 is an oscillator that outputs a low level at a constant period, and its output is input to one of the input terminals of the OR gate OR5.

Panning shot mode program drive display circuit 16
, ps2 is a display circuit for lighting up the display of the pictograph 4θ1 in FIG. ANDlo and ANDll are AND gates, and OR6 is an OR gate. OMPf5 and OMP7 are comparators.

Compare Lake C! The shutter speed T is connected to the inverting input terminal of MP6 and the non-inverting input terminal of comparator OMP7.
A pressure corresponding to the V value is applied. V2O is a constant voltage circuit that outputs a voltage corresponding to the TV value of the shutter speed button V30, and its output voltage is input to the non-inverting input terminal of the comparator CjMP6. Further, v8 is a constant voltage circuit that outputs a voltage corresponding to the TV value of shutter speed %, and its output voltage is input to the inverting input terminal of the comparator OMP7. CLK6 is an oscillator that outputs low level and low level at a constant period, and its output is input to one of the input terminals of OR gate OR6.

In the 2-second self-mode program drive display circuit 17, 821 is a display circuit for lighting the display of the pictograph 4b in FIG. 3, and ANDl2 is an AND gate, OR
7 is the or gate. 0LK7 is an oscillator that outputs low level and low level at a constant period, and its output is input to one of the OR gate OR and 70 input terminals.

In the 10-second self-mode program 2 motion display circuit 18, 5101 is a display circuit for lighting the display of the pictograph 4a in FIG. 3, ANDl3 is an AND gate,
0R13 is an OR gate. 0LK8 is an oscillator that outputs a low level and a low level at a constant cycle, and its output is input to one of the input terminals of an OR gate OR8.

In the type circuit 30 and the release drive circuit 51,
7kND14.

ANDl5, ANDl6 are AND gates, OR9 and OR10 are OR gates, N0RI is Noah gate, 8
w2 is a release switch. 0LK9 is an oscillator,
Outputs a square wave with an oscillation frequency IKH2 (period IMEKO).

The output of the oscillator aLK9 is input to one of the input terminals of AND14. CLKIO is an oscillator that outputs a square wave with an oscillation frequency of 5 KHz (period 0.2 yasEc) (7), and the output of the oscillator 0LK10 is input to one end of the input terminal of the AND gate AND15. C0tlNT1 is a counter that performs a count-up operation every time the OLK input terminal changes from low level to high level.
When the count reaches 0, the Q output is switched from low level to high level for a short time. 082 is a one-shot multivibrator that outputs a high-level Hals from the Q output for a short time when a rising signal is applied to the 8 inputs. T.R.
I is a transistor, and MPj is a 14-magnetic magnet that locks the camera's release operation.It is a rotten structure with a permanent magnet at the center and a coil wound around the outside. Conduction 'f (when i, the shutter locking member (not shown) is attracted by the holding force of the permanent magnet, or the transistor TRI ii ON state J
When the coils il and il are in a conductive state, a current flows in the direction l without changing the magnetic flux of the permanent magnet, attracting the locking member)
A series of release operations will begin.

Next, we will briefly discuss the operation of the circuit described above. When the power switch shown in the small diagram is turned on and a power supply is input, a signal at H level is output for a short time from the power up clear circuit f'Uo, setting the flip 70 knob FFI and resetting the flip flops FF2 to FF7.

Therefore, from the Q output terminal of flip-flop FF1,
The level is output and the flip-flops FF2 to FF7
A low level is output from the Q output j"R1'.Hereafter, press the mode selection button 5 in FIG.
This state is maintained for as long as N.

When the switch +3Wl is turned 011, a rising signal of 4 is applied to the 8 input terminal of the one-shot multivibrator OS1. One shot multivibrator 081 outputs a high level signal for a short time.

This output is input to the (jLK input terminals of flip-flops FF1 to FF7 via OR gate OR1.

Therefore, the output of the flip-flop FF2 whose D input terminal is applied with an H level is switched from low level to high level. Also, the output of the flip-flop FF2 whose D input terminal is applied with a low level FF
A low level is output from the output terminals Q of FF1 and FF3 to FF7.

Furthermore, when the switch SW1 is turned on from OFF, the flip 70 knob F to which the H level is applied to the input terminal J]
The output of F3's output bmQ switches from low level to high level. In addition, the flip-flop FF1. to which the b level is applied to the D input terminal. Output of FF2 and FF4~7! : Low level is output from 4Q. That is, each time the switch SW1 is switched from OFF to ON, the flip-flop that outputs an H level changes from il'F1→FF2→F.
It will shift to F5. Similarly, every time the switch sw1 is changed from OFF to ON, the Noritsu flop that outputs the H level changes from FF3 to FF4 to FF5 to F.
F6 → FF7 → FF1 →... It will change repeatedly.

Also, switch sw1 was turned from OFF to ON and then turned ON. Since a high level signal continues to be applied to one of the input terminals of ANDl, the output signal of the AND gate ANDi becomes 0LKI.
The high-level and low-level repetitive signals are directly output from the trench. The output of the AND gate ANDI is also sent to the flip 70 tubes FF1 to FF via the OR gate OR1.
If the input is not input to the OLK input terminal of 7, switch S
Even when W1 is turned ON, the Noritsu flop still outputs H level at the cycle of oscillator 0LK1, F]Fj → FF2 → FF3 → FF4 → FF5 → F
The IiM order will be shifted from F6 to FF7 to FF1.

Now, going back to the time when 'i(j + Ili< The normal program line selection circuit 20 to which output N1 is applied is selected, and the AV value and TV value are calculated and output on the program line shown in FIG. 2C.However, at this time, as shown in FIG. The voltage (hereinafter referred to as vgv) corresponding to the EV value output from the photometry circuit, which will be described later, is v17.
When <V+9, that is, when the subject light amount is fiV19, the output of the comparator OMP1 becomes no-irrepel.

Further, when Vm>Vn, that is, when the amount of light from the subject becomes larger than BvO, the output of the controller citp2 becomes high level. Since the Ryokawa forces of the controllers OMP1 and OMP2 are logically ANDed by the AND gate AND2, the output of the AND gate AND2 becomes NOIREPEL only when VW is V19 > VEV > vo. On the other hand, VgV is Vll! When V>V19, the output of comparator CMP1 becomes low level, and VW<V. In this case, the output of the converter CMP2 becomes low level, so that Vr; v>Vlv or VRT<v. In this case, the AND gate AND2
The output becomes low level. As can be seen from the above explanation, the output of the AND gate AND2 is at a high level when the subject brightness allows appropriate exposure control from KVo to BV19, but when it is brighter (too bright) than IV19, it is also darker than lo. (too dark), a low level is output.

Well, now Vr;v dt V1? ＞Viv＞
To explain the operation of the circuit in the case of Vo, the output of the AND gate AND2 becomes high level, but the output of the AND gate AND2 becomes high level.
Since the output of ND2 is input to one of the input terminals of OR2, the output of OR gate OR2 also becomes high level. The output of OR gate OR2 is input to one end of the input terminal of AND3, but the other end of AND5 is applied with a high level signal similar to the Q output of flip 70 tube FF1.
The output of the AND gate AND3 becomes high level. Therefore, the display circuit MP2 is activated and the pictograph 4c in FIG. 3 is displayed by lighting. As a result, the photographer can determine that the currently selected program mode is the normal program.

When the next KVyv deviates from v19>VEV)Vg, the output of AND2 is at a low level, and a low level is applied to one of the input terminals of the OR gate OR2. However, since a repetitive high-level and low-level signal is applied from CLK2 to the other OR gate OR2, the output of OR2 is the oscillator C! The same waveform as the output of LK2 is input to AND3.

Therefore, the output of the AND gate AND5 is also the oscillator 0LK2.
The display circuit NP2 has the same waveform as the output of the oscillator 0LK.
Repeats operation and non-operation at the same cycle as 2. As a result, the pictograph 4C in Fig. 5 becomes a blinking display, and it is determined that although the photographer is currently selecting the program mode or normal program mode, proper VH light cannot be obtained due to an inappropriate light amount. can.

Now, next, turn switch SW1 from OFF to ON, and switch the 7-ribbon flop that is outputting high level from FF1 to F.
When shifting to F2, flip-flop FF2
The selection circuit 21 that selects the pan focus program line to which the N2 signal, which is the Q output of
The value is calculated and output. At this time, the calculated AV value (hereinafter referred to as WAY) is output from the photometry circuit, which will be described later in FIG.
If vAv>v16, then the function n' AV value 1
When the AV value of j''1' is greater than the AV value of j''1', the output of the comparator C!MP3 becomes high level.

Conversely, when the calculated jLAV value becomes smaller than F16, the output of the comparator OMP3 becomes low level. The input terminal of AND is the output from the above-mentioned AND gate AND2 and the comparator OMP3.
Since the output of ``Antogame'' is input, from the output of AND4, the AV value is 0 to 19 and the calculated ηAY value is F.
The high level is output only when the AV value of 16 is also larger. Now, if we consider the case where the AV value and the calculated AV value satisfy the above conditions,
Since D4 outputs the NO level, the AND gate AN
The output of the OR gate OR5 to which the output of D4 is applied also becomes high level. Therefore, high level A and No. 1 are applied to both AND50 input terminals, so
AND gate AND5 outputs a high level. Therefore, the display circuit PF2 becomes operational, and the display of the pictograph 4e2 in FIG. 6 is turned on. As a result, the photographer can determine that the currently selected mode is the pan focus program.

Next, when the AV value and the calculated AV value deviate from the above conditions, the AND gate ANI)4 outputs a low level.

Therefore, a low level is applied to one end of the input terminal of OR3. On the other hand, the output of OR5 has the same waveform as the output of oscillator OL8. Become. The output of OR gate OR5 is AND5)
, the output of the AND gate AND5 also has the same waveform as the output of the oscillator 0LK3. Therefore, display circuit PF
2 repeats operation and non-operation at the same cycle as the oscillator 0LK5, and as a result, the display of the pictograph 4e2 in FIG. 3 becomes a blinking display. #) Photographer: The currently selected mode is Pan 7 Orcus mode, but the brightness of the subject is such that the pan focus effect cannot be obtained, or the brightness is such that proper exposure is impossible. can be determined.

Now, consider the case where the switch sw1 is turned on from OFF and the flip-flop F11'3 is outputting a high level. The following circuit operation description is based on the previous We flip 7
0 Tsubu FF1. Since it is almost the same as when PF2 outputs a high level, a detailed explanation will be omitted, but when the flip-flop FF3 outputs a high level, the selection circuit 22 that selects the stop motion program line is selected.
AV value, TV on the program line shown in the second diagram.
Once the value is calculated, it will be output. At this time, the subject brightness is gvo~KV19 and the calculated TV value is equal to or higher than the shutter speed. . When the value becomes larger than the TV value at 0 seconds, the display circuit 8M2 becomes active, and the display of the pictograph 4a2 in FIG. 5 lights up.

In addition, when the AV value and the calculated TV value deviate from the above conditions, the display circuit SM2 repeats operation and non-operation at the same cycle as the oscillator CLK4, and the display of the pictograph 4a2 in FIG. 3 blinks, and the stop motion effect is Inform the photographer of the F-4 notice that cannot be obtained.

Furthermore, when the switch swi is turned from OFF to Ok+ and the clip-flop FF4 outputs a high level, the selection circuit that selects the gradient mode 4-gram twin is selected, and the AV value is The TV value is calculated and output. When the subject brightness is EVO
-EVI9, and the operation AVfiJ F = 2.8
TV performance 7? -The AV value and υ are also small”! In the fourth case, the display circuit GM2 lights up the display of the pictograph 4dl in figure u33, regardless of the operating state.

In addition, when the EV value and the calculation AV 1 (α deviate from the above-mentioned
) The display 4a1 flashes to warn the photographer that the gradient effect cannot be obtained.

Also, when the switch sw1 is turned on from OFF and the flip-flop FF5 outputs a NO level, the selection times for selecting the vanning shot program line +7.
', 521 are selected, and the AV value and TV value are calculated and output on the program line shown in FIG. 2E. At this time, if the brightness of the subject is FiVQ~EV19 and the calculated TV value is thicker than the rv value of the shutter speed nose ring and smaller than the TV value of %, the display circuit PS2 enters the operating state, and the pictogram shown in FIG. Graph 4e1's 7 (indicator lights up. P] If the v value and calculated AV value deviate from the above case, it will be displayed. f→return, U↓The display of pictograph 4e1 in Figure 6 flashes, informing the photographer that the banning effect cannot be obtained.

For each program mode except the self mode, the mode selection, the display at the correct time, and the Full light display at the improper IF have been described above.

Next, we will explain the operation when selecting the self-timer mode (1).

When selecting the panning shot mode, switch S
When W1 is turned on from OFF, the Q output of the 7-ribbon flip-flop FF6 goes to the low level, and the signal crab N6 is added to the Q output of FF6.The 2-second self-mode program line selection circuit 23 generates the second Shown in Figure B. The AV value and TV value are calculated and output on the program line. At this time, when the subject brightness is within the range of EVo-EVI9, the AND gate AND2 outputs the level, which is input to one end of the input terminal of the OR7, so the OR gate OR7 outputs the level.

Therefore, a high level is applied to both inputs of the AND gate ANT) 12, and the AND gate Al11) 12 (I
When the i high level is output and the display circuit 821 is in an operating state, the display of Victograph 2) 4b in FIG. 3 is displayed by lighting.

When the subject brightness is outside the range of Bv0 to EV19, a low level is applied to one end of the input terminal of the OR gate OR7, and the output of the OR7 has the same waveform as the output of the oscillator 0LK7, resulting in the output of the AND gate AND12. The output is also an oscillator C! It has the same waveform as LK7. Therefore, the water absorption circuit 821 repeats activation and deactivation at the same cycle as the oscillator 0LK7, and the display of the pictograph 4b in FIG. 3 blinks to notify the photographer of a small appropriate exposure.

Subsequently, when switch SW1 is turned from OFF to 01+, the Q output of flip 70 knob FF7 becomes a no-i level, and the 10-second self-mode program line selection circuit 24
is activated, and on the program line shown in FIG.
The V value and TV value are calculated and output. At this time, when the subject brightness is within the range of ivo to BiV19, as in the 2-second selfie mode, the display circuit 5101 is not in operation and the pictograph 4a in FIG. 6 is lit. When the subject brightness is outside the above range, 5101 has a cycle of 0LIKB and 1
The camera repeats activation and deactivation at the same timing, flashing the pictograph 4a in FIG. 3, and notifying the photographer.

Next, press the release button SW when selecting each program mode.
The operation when 2 is turned ON will be explained.

2 seconds self mode or tri: 10 fJ)
Since a low level is applied to the input terminal of N0Ri, the output of the NOR gate N0R1 becomes a low level.

At this time, release button 3 turns series release switch SW2 to O.
If N, it's an anime game) AND16 i! A high level signal is applied to the fi input terminal, and the AND gate AND
16 outputs a high level, resulting in OR1
The output of 0 also becomes high level. At this time, ORGATE 0R1
The output of Q switches from low level to no-low level, and at this rising edge, one-shot multivibrator O82 is activated L, and a high-level signal is output for a short time. As a result, the transistor TR1 enters the operating state, the IH (magnet MfJ is energized, and the release part (not shown)
'' is released and a series of IJX'' operations are performed thereafter.

Next, an explanation will be given of the operation when the release switch BW2 is turned OFF while the 2-second self-mode or the 10-second self-mode is selected.

If you select either 2 seconds self mode or 10 seconds self mode, flip-flop FF6 or FF7
Since one of them is outputting]・Irepel, the output U of NOR gate 1 (ORi) becomes low level. As a result, the output of AND gate AND16 also becomes low level. Now, when release switch BW2 is turned on from OFF, A rising signal is applied to the F3ET input terminal of counter C!0UIJT1, the contents of the counter are cleared, and counter COυNTi starts counting.2
When the second self mode is selected, the AND gate AND15 is opened and the output of 0LK10, which outputs a square wave with an oscillation frequency of 5 KH2, is input to the CLK input terminal of the counter 00UNT1 via OR9.

The counter 00UNT1 counts 10,000 rising edges and outputs a high level signal for a short time from the Q output after counting. During this time 10,000 x
%x10'=2 seconds.

Also, when the 10 second self mode is selected, AND14 opens and the output of oscillator 0LK9, which outputs a square wave with an oscillation frequency of l KHz, is
It is input to the input terminal of counter COυNT1 via OR9. At this time as well, the counter outputs a high level to the Q output after counting 10,000 shots, but in this case, ld: 1 (3, OOOX % -10 seconds).

In both 2-second self mode and 10-second self mode, the rising edge from the Q output from counter 00UNT1 is applied to the S input terminal of one-shot multivibrator os2 via OR gate 0R10. , the wank yacht multi-pie break 0E12 operates, and the transistor TR1 is energized to ONL and the electromagnet Mf1 as in the modes other than the self mode, and thereafter a series of release operations are performed.

In the photometric circuit 19 of FIG. 6, Vlo is a constant voltage source,
Operational amplifier (hereinafter referred to as operational amplifier) OPl, which will be described later.
A bias voltage is applied to the non-inverting input terminal of 6P3.

V2O is a constant current source, OPI, OF2゜OF2 is an operational amplifier, Dl is a temperature compensation (IT diode), and D2 is a photodiode that outputs a photocurrent proportional to the subject brightness.
3 is a diode for logarithmic compression, Pl is a hojistor, R1 is an Sv information resistor that provides information proportional to 18 degrees of film, and R2 provides information on the aperture f-number of lens 2 attached to the camera body in Figure 1. The Ayo information resistor R3 is a resistor, and the above circuit forms a well-known photometry circuit, and a voltage VEV corresponding to the EV value is output. In the normal loop quadrature line selection circuit 20, a clip 7 is connected to the input terminal 20a.
The Q output from the 0-tube FFl is applied.

Since both the pan focus mode and the panning shot mode use the same 7'0g line, the pan focus program, program line selection circuit, and panning shot program selection circuit 21 also serves as the input terminal for selecting the inner program line. 21a, 21
Q outputs from flip-flops FF2 and FF5 are respectively applied to b.

The stop motion program selection circuit and glad mode program selection circuit 22 also serves to select both program lines since both the stop motion mode and the glad mode use the same program line, and input terminals 22a and 22b are provided with flip-flops. FF
5. The q output from FF4 is applied to each. 2 second self mode program selection circuit 230 input terminal 25a
The Q output from the KFi flip-flop FF6 is applied.

The q output from the clip-flop FF7 is applied to the input terminal 24aIc of the 10-second self-mode program selection circuit 24. In the above circuits 20 to 24, ■101
~v113 is a constant 8 Shobara, OF4~0F22 are operational amplifiers, R4~R57 are resistors, BWl~SWI1 is an analog switch, which becomes conductive when a high level control 11i1 signal is applied, and a low level control m signal. When applied, it becomes non-conductive. OR1 [and 0R12L or gate, N
0R2 and OR3 are Noah Gate, OMF8~C! M.P.
11 is a cosiparator. The circuits 20 to 24 respectively calculate the aperture AV value in accordance with the voltage VW corresponding to the FXV value output from the circuit N519 in accordance with each mode.
Outputs a voltage corresponding to the V value.

In the limiter circuit 25, F22 is F22(7)AV
10 corresponding to the value. Constant voltage source that outputs voltage, v2 is F2
This is a constant voltage source that outputs a voltage corresponding to the AV value of . O
MP12 and OMP15 wire comparators 4-8
W17 is an analog switch, 11 and a two-way inverter. The limiter circuit 25 outputs the output from the circuits 20 to 24 (a limiter is applied to the pressure, and the 'C pressure way is F2).
2 (7) AV or less T F2 (7) AV or more The output is made so that the screw pressure falls within the range corresponding to the AV value.

In the subtraction circuit 27, 0F2511 operational amplifier, R5B
~R61 is a resistor. The reduction 31 circuit 27 is the photometry circuit 1
The vAv output from the limiter circuit 25 is derived from the VΣV output from the limiter circuit 25, and vTV''V!l!V-VAV is calculated and output.

In the limiter circuit 28, ■'Aooo is a constant voltage generator that outputs a voltage corresponding to a TV value corresponding to a shutter speed of 'Aooo seconds, and y41 is a voltage that corresponds to an 'ff value of a shutter speed of 4 seconds. The output constant 'forming pressure d~ is. OMP14 and OMP15 are comparators, 5w16
~8W21 is an analog switch, 3 and 14 wire impark.

The limiter circuit 28 is output from the reduction η1 circuit 27.
Apply a limiter to the TV, and when v'rv is less than the TV value of the shutter speed Mooo seconds, set the shutter speed T of 4 seconds.
It operates so as to fall within the 19 pressure range corresponding to the TV value below the V value. 0P10, 0P2B.

0P29 is an operational amplifier for buffer, operational amplifier 0P
10 provides vgv to the selection circuit 12. Also, calculation increase 1
] The device 0P28 is the vAvtl-select Iul path 15 and 15.
and the operational amplifier 0P2911i and VTV are provided to the selection circuits 14 and 16.

Next, the operation of the circuit described above will be explained. Since the photometry circuit 19 is a well-known photometry circuit, a detailed explanation will be omitted. f
l current flows through the photodiode D2, and the photocurrent is logarithmically compressed by the operational amplifier OP2 and the logarithm compression diode D6. In addition, the output of the temperature compensation circuit consisting of the constant current circuit v10, the diode DI, and the operational amplifier op1 is applied to the non-inverting input of the operational amplifier 2, and the diode D2. D! + reverse saturation current. Therefore, the output of the operational amplifier OF2 logarithmically compresses the subject brightness and becomes a voltage proportional to the absolute temperature. By calculating the 1 liter pressure using the hodister P1, the resistor R3, and the operational amplifier OP5, the output of the operational amplifier op5 becomes a logarithmically compressed value that does not depend on the temperature of the object brightness.

Further, film sensitivity information and lens open F-number information are added by the SV information resistor R1 and the AVO information resistor R12, and the output of the operational amplifier OP3 becomes a voltage corresponding to the exposure 3117. This voltage value (V+v) is supplied to each program selection circuit, and after being buffered by an operational amplifier 0P10, Vff is provided to the aperture control circuit 26.

Next, the normal program line selection circuit 20 will be explained.

A well-known subtraction circuit is constructed by resistors R4, R5, R6, R7 and operational amplifier OP4. R4, R5, R
If the resistors of 6°R7 all have the same value and the output voltage of constant voltage source v101 is VIOl, then the operational amplifier O
The output voltage of P4 becomes VB'V - Vlol.

Further, a well-known positive phase amplifier circuit is formed by the resistors R8 and R9 and the operational amplifier OP5. The output voltage of the operational amplifier OF5 becomes . However, by replacing with As is clear from this equation, the output 'voltage of operational amplifier OP5 can be changed by the linear equation of VFiV, so vlol and R1, R
By setting 2 to an appropriate value, it becomes possible to calculate and output the AV value along the program line of the normal program. At this time, if the projector has selected the normal program, flip-flop? The Q output from F1 is /
＼Because it becomes an irregularity, an irregularity is applied from the terminal 20a, and the analog switch sw5 is not in a conductive state.
The AV calculation result is transmitted to the limiter circuit 25.

Next, a pan focus mode program, a panning shot program selection circuit 21 and a stop motion program, a gradient %-dobro program selection circuit 22
I will explain about it.

The basic circuit operation is the same as circuit 20, but resistor R1
4, R15 and R20, R21 (7) resistance value and Vl
02.

By changing the output voltage of v105, different calculation outputs can be obtained.

The circuit 21 outputs a voltage value corresponding to the AV value along the program line in the pan focus mode and the banging shot mode. If the photographer selects pan focus mode or line banging shot mode, flip-flop FF2-! Since a high level is output from the Q output of FF5, a high level is applied to the analog switch SW4 via OR11, the switch SW4 becomes conductive, and the AV calculation result is sent to the limiter.
The signal is transmitted to the circuit 25.

From circuit 22, AV along the program line of the stop motion program and the glad mode program
A voltage value corresponding to the value is output, and if the photographer selects stop motion mode or gradient mode f3 at this time, a high level is output from the Q output of flip-flop FF3 or FF4, and the voltage value is output via OR gate 0R12. Since a high level is applied to the analog switch SW5, the switch SW5H becomes conductive and the AM calculation result is transmitted to the limiter circuit 25. The 2-second self-mode programming line selection circuit 25 basically has the same operating principle as the circuit 20, but since the program line is bent at two places along the way, it can be switched using the EV value. There is. Constant KEE source V107 Equivalent to Hxv17 ffh, [E(ifit: constant voltage source 6V1
Reference numeral 08 is a constant 'Kameshobara' which outputs a voltage value equal to lV5. When the voltage output from the photometric circuit 19 is fi% higher than the voltage value equivalent to BV17, the comparator OMP8 outputs an I level. Further, the comparator 9 outputs a low level. For this reason, the comparator OM
NOR gate N0R to which both outputs of P8 and OMP9 are applied
Outputs Z line low level and as a result analog switch S
WS becomes conductive and switches 8W7 and 8W8 become non-conductive. Also, the pressure '4 output from the photometry circuit 19 is y;
If the voltage value corresponding to v17 is also low and the voltage value corresponding to 175 is also low, the comparator cyP8,
The outputs of OMP9 are both low level, and the NOR gate N
The output of 0Rj becomes high level. In this case, only the switch 8W7 becomes conductive, and the switches 8W6, 8W8 become non-conductive. Furthermore, when the voltage output from the photometric circuit 19 becomes lower than EV5, the comparator OMFB
outputs a low level, and comparator OMP9 outputs a high level. Therefore, N0R2 outputs a low level (1), and as a result, only switch sw6 becomes conductive, and both switches BW6 and SW7 become non-conductive. As described above, it becomes possible to perform AV performance along the program line of the 2-second self mode, which bends at FiVl 7 and BV5.

If the photographer selects 2 second selfie mode, 7
Since a high level is output from the flip-flop FF6, a high level is applied from the input terminal 23a, the analog switch 8W9 becomes conductive, and the AV calculation result is transmitted to the limiter circuit 25.

The circuit 24 is also similar to the circuit 23, but ■112 is gv1
'Ttf, which corresponds to 2, is a constant voltage source that outputs the voltage, v1
13 is a constant voltage source that outputs a voltage corresponding to FiV8. Therefore, AV calculation can be performed along the program line that bends at two points, gv12 and EV8. When the photographer selects the 10-second selfie mode, a high level is output from the flip-flop FF7 and a high level is applied from the input terminal 24a, so the analog switch 5W13 becomes conductive and the AV calculation is performed. The result will be transmitted to limiter circuit 25.

Next, the limiter circuit 25 will be explained.

V22 is a constant voltage source that outputs a voltage corresponding to the AV value of the pattern value F22. v2 is a constant voltage source that outputs a voltage corresponding to the AV value of the aperture value F2. Depending on the mode selected from one of the circuits 20 to 24, a voltage corresponding to the calculated gAV value is applied t'J to the non-inverting input terminal of the comparator OMP12, but at this time, the voltage corresponding to the calculated pi AV value When the voltage is lower than the voltage corresponding to the AV value of the aperture value F22, the comparator OMP12 outputs a low level. Therefore, a low level is applied to the analog switch 5W14, and a high level is applied to the analog switch 5W15 via the inverter 11. As a result, switch 8W
14 is not conductive and the switch is 5V (15 is not conductive,
The voltage corresponding to the actual RAY value is directly applied to the comparator OM.
Input to the inverting input terminal of P13.

Conversely, when the calculated AV value exceeds the AV of the aperture value of 22, the switch sw14 becomes conductive and the switch 5w15 becomes non-conductive, so that the voltage corresponding to the AV value of the aperture value of 22 is applied to the inverting input terminal of the comparator OMP15. Emphasis on inputting. Comparator OMPI! , outputs a low level when the voltage input to the inverting input terminal is higher than '1j, which corresponds to the AV value of the fringe value F2. Therefore, the low level is applied to the analog switch 5W17, so it becomes non-conductive, and the low level is applied to the analog switch 5W17 (through the inverter 2), so it becomes conductive, and the voltage is applied to the inverting input terminal of the converter OMP13. The voltage tIj is applied as is. On the other hand, conversely, the controller cMP15
The voltage input to the inverting input terminal of F2 is A of F2.
When the voltage corresponding to the V value and υ also become lower, the comparator (! A voltage corresponding to the AV value of BL5 will be output.

As can be seen from the above results, the limiter circuit 25 outputs i+shi pressure corresponding to AV as the calculation result;
A limiter is applied so that the pattern value is within the range of 2 or more and the pattern value is 2 or more. The output of the limiter circuit 25 is inputted to the curvature control circuit 26 and the reduction circuit 27 through the 3-volt limiter 0F2B as well as the refrigeration furnace 613.15 to provide VAV.

In the limiter circuit 25, V22. 'V2 was set to a constant voltage, but as shown in Figure 7, a constant voltage source (for example,
v) may be output by dividing the voltage using a resistor. At this time, the output slides over the resistor R62゜R63.
9), adjust R65 to output the AV of the open F value of the lens.
Adjust R62 to N'M so that the pressure corresponding to the value is output.
By outputting a voltage corresponding to the V value, it becomes possible to change the program line when replacing the lens.

At subtraction circuit M27, a well-known subtraction circuit is canceled by resistors R58 to R61 and operational amplifier 0P25, and VEV -vAv is calculated and outputted here, and inputted to limiter-161 path 2B.

Since the operation is basically the same as that of the limiter circuit 2B and the limiter circuit 25, I will omit the "trustworthy explanation 1", but vMooo has a shutter speed! /(A constant voltage source that outputs a voltage corresponding to a TV value of 000 seconds. V4' is a constant voltage source that outputs a voltage that corresponds to a TV value of a shutter speed of 4 seconds. It is manually powered from the reduction nail 1 circuit 27. VKV −vAv is
When v′AOoo becomes larger, comparator OMP
When the output of 14 is high level, the voltage of vHooo is the voltage of comparator C! Input to the non-inverting input terminal of MP15.

Comparator OMP15 outputs a high level when this voltage becomes smaller than V4', and a voltage of va I is output. In other words, the limiter circuit 25 is VKV -VA
A limiter is applied so that T is within the TV value range of 4 seconds or more when the shutter speed is `Aooo seconds or less.

The output from the limiter circuit 2 is output as VTV to the shutter control circuit 29 and the circuit 14 through the buffer operational amplifier 0P29. Provided to IS.

In the above embodiment, the self mode was switched together with other exposure control modes, but as shown in FIG. 8, a self mode switching button 7 (1 to 6 are the same as in FIG. To switch the exposure control mode, press the exposure side (il mode switching button 5) sequentially or by holding down the υ exposure control mode to normal program mode, pan focus mode, stop motion mode, panning shot mode, normal program mode and vice versa. Corresponding to this switching, the exposure control mode display section 4 also changes from 4c to 4+8.
2-') Switch as 442 → 411 → 4d1 → 4c.

Next, when the self mode is desired, the exposure control mode is switched to the 2-second self mode by switching the self mode switching button 7 from A to 2, and 4b is displayed on the exposure control mode display section 4. Next, by switching the self mode switching button 7 from 2 to 10, the exposure control mode is set to 10.
Seconds Switch to self mode υ Exposure control mode display section 4 is 4
a is displayed. This makes it possible to switch the self mode with a single operation (switching the self mode switching button).

FIG. 9 shows another embodiment of the present invention, which is a control circuit for the camera shown in FIG. 8 in which a self-mode selection switch is separately provided, and the same parts as in FIG. A detailed explanation of this will be omitted.

AND17-21 are AND gates, and 5w22 is a changeover switch between normal mode and self mode which is linked to mode changeover button 7 in FIG.

When the switch 22 is set to the A position, a high level is applied to one end of the input terminal of the AND gates AND17 to AND21, so the normal program, pan focus mode, stop motion mode, and normal program mode are switched to the mode switching button 5. Switching is possible by operating nJ.

However, by switching the switch 8W22 from the A digit 1 to the 2 position, υ, ant game) AND17
Since a low level is applied to .about.21, no matter which mode is selected, it will be in a non-select state.

Further, a high level is applied to the 2-second self-program seventh mode selection circuit s2, and photometric calculation is performed in the 2-second self mode. When the switch EIW22 returns from the 2 position to the A position, the AND gates AND17-21 are opened again and the previously selected mode is determined.

When the switch 8W22 is set to the 10 position, a high level is applied on day 10 and the 10 second self mode is selected.

As explained above, according to the present invention, by being equipped with a dedicated program for the selfie mode, it is possible to take selfie pictures in consideration of image effects without disturbing the person taking the picture.

[Brief explanation of drawings]

Fig. 1 is a plan view of a multi-program automatic exposure control camera showing an embodiment of the present invention, Fig. 2 is a program diagram of the camera shown in Fig. 1, and Fig. 3 is a mode display of the camera shown in Fig. 1. FIG. 4 is a detailed diagram of the camera control circuit shown in FIG. 1, FIG. 5 is a detailed diagram of the switching circuit, display drive circuit, and release circuit shown in FIG. 4, and FIG. FIG. 3 is a detailed diagram of the selection circuit and limiter circuit shown in the figure. Figure 7 is w
Figure I6 is a circuit diagram showing a modification of the constant current net of the Mitsuter circuit, Figure 8 is a top view of a multi-program automatic exposure control camera showing another embodiment of the present invention, and Figure 9 is a circuit diagram of the camera shown in Figure 288. It is a control circuit diagram. 1... Camera body 2... Lens body 5... Release button 4... Exposure control mode display section 5... Exposure control mode switching button 6... Metering button 7... Self mode switching button 11...Selection signal generation circuit 12-18...Display drive circuit 19...Photometering circuit 20-24...Selection circuit 25.28...Limiter circuit 26...Aperture control circuit 27...・Subtraction circuit 29...shutter control circuit

Claims (1)

[Claims] In a multi-program control camera that can switch to various exposure control modes, a program mode circuit dedicated to the self-timer is provided in consideration of image effects, and when the mode switching circuit is set to self-timer shooting, the signal from the mode switching circuit is A multi-program control device for a camera, characterized in that a program mode circuit dedicated to the self-timer is activated.