JPH01235929A - Multidivided photometric device - Google Patents

Abstract

PURPOSE:To exactly recognize the luminance distribution of a subject by providing plural photometric means which determine the luminance information of the photometric regions corresponding respectively to plural regions for focus detection thereby discriminating the main subject and exactly measuring the luminance thereof and the background luminance as well. CONSTITUTION:A 1st photometric means obtains the luminance information of the region 1-3 corresponding to the position of the main subject in order to obtain the main subject luminance and the 2nd photometric means obtains the luminance information of the 2nd photometric regions 4, 5 existing around the 1st photometric regions 1-3 in order to obtain the main subject luminance or the background luminance. The 3rd photometric means obtains the luminance information of the 3rd photometric region 6 existing on the outside of the 2nd photometric regions 4, 5 in order to obtain the background luminance. The main subject luminance is thereby always exactly measured even if the position of the main subject and the ratio at which the main subject occupies on the photographing image plane change variously. In addition, the background luminance is exactly measured as well. The conditions of the luminance distribution of the subject are thus exactly recognized.

Description

[Detailed description of the invention]

FIELD OF THE INVENTION The present invention relates to a multi-segment photometry device that divides a field into a plurality of regions and measures luminance information of the plurality of regions. A variety of multi-segment photometry devices have been proposed that divide a field into a plurality of regions and measure luminance information of the plurality of regions. For example, Japanese Patent Application Laid-Open No. 59-31933 discloses that a main subject is detected from among subjects existing in one or more different parts of the scene, and the luminance of the area where the main subject exists and other areas is A photometric device has been proposed that measures . This device uses the brightness of the area where the main subject is present and the brightness of other areas to determine the brightness distribution situation (backlight condition) of the subject and determines the exposure control value to properly expose the main subject. I'm looking for it. On the other hand, Japanese Patent Application Laid-Open No. 61-279829 discloses that the field of view is divided into a plurality of concentric areas centered on the center of the angle of view and surrounding areas of the concentric areas, and each area is A photometric device has been proposed that calculates an exposure control value using a photometric value of . This device detects the size of the subject (main subject) image existing in the center of the field, selects five desired areas from the photometric areas of the front concentric circles according to the size, This allows the main subject brightness to be accurately measured. At the same time, based on the main subject's brightness and the photometric values of the surrounding area of the concentric area, the situation of the brightness distribution of the subject is judged, and the exposure control value that will give the main subject an appropriate □ exposure is determined. . Furthermore, Japanese Patent Application Laid-open No. 61-215834 discloses that the field of view is divided into at least three areas: a central area, a first area outside the central area, and a second area further outside the first area. A photometric device has been proposed that further divides at least the outermost region into a plurality of small regions and measures luminance information of these regions and small regions. This device assumes that the main subject exists in the center of the field, and calculates the size of the main subject and the brightness distribution of the field based on the brightness information of multiple areas and small areas. The photometric calculation is selected according to the determination result □. At the same time, for the brightness information of the outermost area of the field where inappropriate elements are likely to be added, the brightness information of the inappropriate elements is removed to obtain the brightness information. Thereby, this device enables appropriate photometric value calculation for the main subject. Problems to be Solved by the Invention However, in order to obtain proper exposure for the main subject, it is necessary to accurately measure the main subject's brightness and to accurately understand the situation of the brightness distribution of the subject. . In order to accurately measure the main subject brightness, it is necessary to accurately determine not only the position of the main subject but also its large %z. Furthermore, in order to accurately grasp the situation of the luminance distribution of the subject, it is necessary to accurately measure not only the luminance of the main subject but also the luminance of the background (sub-subject). However, among the photometering devices that have been proposed to date, the first type does not only determine the position of the main subject, but also grasps the brightness distribution situation of the subject, and does not know about the size of the main subject image. , etc., the main subject cannot be accurately determined, and if the size of the main subject image changes, the main subject brightness cannot be accurately measured. Therefore, this device is not always able to determine an exposure control value that will properly expose the main subject. On the other hand, in the second and third types, the size of the main subject image or the position of the main subject is not determined, so the main subject cannot be accurately determined. Once the position changed, it was necessary to accurately measure the brightness of the main subject. Furthermore, since the second type uses the brightness of a predetermined area as the background brightness, it is not necessary to accurately measure the background brightness to accurately grasp the situation of the brightness distribution of the subject. I couldn't. Therefore, these devices are not necessarily
It was not always possible to determine the exposure control value that would properly expose the main subject. When the position of the subject and the proportion of the shooting screen changes,
It has not been possible to accurately measure the main subject brightness or 9-zoom brightness, and it has not always been possible to determine an exposure control value that will properly expose the main subject. Therefore, the present invention is capable of always accurately determining the main subject and accurately measuring the brightness of the main subject, even if the position of the main subject and the proportion of the main subject in the photographic screen vary.
It is an object of the present invention to provide a multi-segment photometry device that can accurately measure background brightness and thereby accurately grasp the situation of brightness distribution in a photographic field. In order to achieve the above-mentioned object, the multi-segment photometry device of the present invention obtains luminance information of a plurality of first photometry regions corresponding to each of a plurality of detection target regions. a plurality of first photometric devices; a second photometric device that obtains luminance information of a second photometric region located around the first photometric region; and a second photometric device that obtains luminance information of a third photometric region located outside the second photometric region. and a third photometric means. In the multi-segment photometry device of the present invention equipped with each of the above-mentioned means, the first photometry means obtains brightness information of an area corresponding to the position of the main subject in order to obtain the main subject brightness, and the second photometry means obtains luminance information of an area corresponding to the position of the main subject. In order to determine the main subject brightness or background brightness, the third photometric means determines the brightness information of a second photometric area located around the first photometric area, and the third photometric means determines the brightness information of a second photometric area located outside the second photometric area in order to determine the background brightness. 3. Obtain the brightness information of the photometric area. Therefore, as shown below, by using this photometry device, even if the position of the main subject and its proportion in the shooting screen vary, it is possible to always accurately measure the main subject's brightness, and also to accurately measure the background brightness. Through measurements, it is possible to accurately grasp the brightness distribution situation in the field. For example, when the main subject image is large, the main subject image is selected based on the luminance information selected according to the position of the main subject from among the plurality of luminance information obtained by the first photometric means and the luminance information obtained by the second photometric means. The brightness is determined, and the background brightness is determined from the brightness information determined by the third photometric means. When the main subject image is small, the main subject brightness is determined from the luminance information selected according to the position of the main subject from among the plurality of luminance information determined by the first photometric means, and the second photometric means determines the brightness of the main subject. Background brightness is determined from the brightness information and the brightness information determined by the third photometric means. Dog 111 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Hardware description]

[Whole System] FIG. 1 is a block diagram showing an electric circuit of a camera system embodying the present invention. The camera system of this embodiment has four exposure control modes: program (P), shutter speed priority (S), fringe priority (A), and manual (M). In the figure, MCB is a microcomputer (hereinafter referred to as
(abbreviated as microcomputer), which is built into the camera body and controls the entire system. Microcomputer M
A photometric interface LIF is connected to the CB via a serial data bus SDB. A seven runcill circuit FLC, a display circuit DSP, and a lens circuit LEC are connected. Also, the microcomputer MCB
is connected to an AF interface AIF via another data bus ADB, and further connected to a drive circuit DDR via another data bus DDB. A photometric circuit LMA is connected to the photometric interface LIF, and six 7-I diodes PDo-PD are connected to the photometric circuit LMA. The seven optical diodes PDo-PD are arranged so as to receive light incident on different parts of the photographic screen, respectively. The photometric range of the receiver is shown in Figure 2. In other words, 7 Otodiodes PDoIj: Shooting screen FL
It is arranged so as to receive the light incident on the circular part 1 located at the center of M. And 7 Otoguiode PD
, receives the light incident on the C-shaped portion 2 located on the left of the circular portion 1, and similarly, the 7-otodiode PD2 receives the light incident on the C-shaped portion 3 located on the right of the circular portion 1. The photodiode PD3 receives 1. so as to receive the light incident on the C-shaped portion 4 located above the circular portion 1.
The photodiode PD is located under the circular part 1
It is arranged so as to receive the light incident on the character-shaped portion 5. Further, the 7-otodiode I) D is arranged so as to receive light incident on a portion 6 excluding the above-mentioned portion of the rectangular photometry range LMR. When the photometry area is determined in this way, it is possible to place emphasis on the center and smoothly change the spot diameter according to the size of the subject image. Furthermore, it is possible to perform exposure control that emphasizes dark areas by utilizing the luminance difference between the relatively upper portion 4 and lower portion 5 of the photometric region LMR. In other words, if the brightness of area 4 is much brighter than the brightness of area 5, such as when shooting under clear skies, the weight of the photometric value of area 4 may be reduced to make the main subject more suitable. can. Note that, as is clear from FIG. 1, the anodes of all seven otodiodes PDo-PD5 are commonly grounded. In addition, the photometric ink face LIF is equipped with an A-D converter, and converts the photometric output from the photometric circuit LMA into an A-D converter.
Convert and output to microcomputer MCB. Further, the photometry interface LIF includes a DA converter, converts data corresponding to the amount of flash light control from the data bus SDB from D to A, and outputs the data as an FSI- signal to the flash light measurement circuit LMF. The flash light measurement circuit LMF is a circuit that measures flash light and outputs a dimming signal FSTP for stopping flash light emission when proper exposure is obtained. This circuit LMF receives the flash light reflected from the film surface with a 7-oteg diode PDF, logarithmically compresses the current corresponding to the received light intensity, and converts it into a voltage. Then, the circuit LMF adds this logarithmically compressed voltage and the FSL signal, logarithmically expands it, and converts it into a current. Then, the LMF integrates the current, and when the integrated amount reaches a proper value, it outputs a dimming signal F S T P to stop the 7/s light emission. The 7-push 1-circuit FLC will be described in detail later. The display circuit DSP displays various photographic information (aperture value, shutter speed, exposure control mode, etc.), reads the ISO sensitivity of the film from the cartridge through a contact CAS, and transmits it to the microcomputer MCBL. The display circuit DSP is
It is equipped with its own control microcomputer, and Xl is the reference clock generation circuit for the microcomputer. The lens circuit LEC is provided in each photographic lens, and outputs information specific to each photographic lens (focal length, open aperture value, etc.). The AF interface AIF receives a control signal from the microcomputer MCB via the data bus ADB. And A
Based on its control signal, the F interface AIF:
The operation of a focus detection light receiving circuit AFD including a CCD line sensor is controlled through a signal line AFS. moreover,
AP Ink 7 Ace AIF inputs analog data of each pixel of CCD line sensor via line AFS,
After converting those data from A to D, the data bus AD
It is output to the microcomputer MCB via B. The focus detection light receiving circuit AFD consists of three CCD line sensors IS'Lo and I.
SL, , 15L2, and each CCD line sensor is used to detect the in-focus state of a subject located in the range shown by the broken line in FIG. That is, C
The CD line sensor l5L0 is located at the center of the shooting screen FLM (
! This is used to detect the in-focus state of a subject in the horizontal direction located in the IRO zone. And the CCD line sensor I SL is slightly to the left of the center (first zone)
It is used to detect the in-focus state of a vertical subject located at . Further, the CCD line sensor ISL is used to detect the in-focus state of a subject in the vertical direction located slightly to the right of the center (!m2 zone). AP
The interface AIF has three CCD line sensors l
When the CCD integration of 5Lo, ISL, , 15L2 is completed, an "L" level integration completion signal AFFN is output, and an interrupt INT is applied to the microcomputer MCB. VG is a voltage conversion circuit that boosts the voltage of a DC power supply battery BA and supplies two types of voltages HV and LV (HV>LV) to each circuit. The high voltage HV is supplied to the AF interface AIF and the focus detection light receiving circuit AFD, and the low voltage LV is supplied to the photometry interface LIF and the photometry circuit LMA.
, seven-lens light measurement circuit LMF, lens circuit LEC, drive circuit DDR, and encoders ENAP and ENLE. Note that the microcomputer MC8, display circuit DSP, and motor control circuit MOD are connected via a power supply line VDD.
Power is supplied directly from the electric ABA. Next, the switch will be explained. Sl is a photometry switch, which is turned ON when a release button (not shown) is pressed to the first stroke. By turning on this switch S1, the microcomputer MCB:
Starts photometry and focus state detection. ALS is an AE lock switch, and the photometric value at the moment the switch ALS is turned on is locked. SR8 is a reset switch, and when this switch SR3 is turned on, the entire system is initialized. MOS is an exposure control mode selector switch, and this switch MO3
Each time the is turned on from OFF, the exposure control mode changes to p-
It changes as s→A→M→P... IJS and DS are data setting switches, and each time the switch US is turned from OFF to ON, the shutter speed increases by IEv and the aperture value increases by 1/2Ev. Similarly, each time the switch DS is turned from OFF to ON, the shutter speed decreases by IEv, and the aperture value decreases by 1.
/ 2 E v decreases. S2 is a release switch, which is turned ON when the release button (not shown) is pressed to the second stroke, which is longer than the vJ1 stroke. Therefore, when the release switch S2 is turned on, the photometry switch S1 is also turned on.
It is N. By turning on this switch S2,
The microcomputer MCB starts the exposure control operation. S is a photographing completion detection switch, which is turned ON when the mirror is lowered, the aperture is opened, and the shutter trailing curtain has completed running after exposure is completed. Thereafter, when film winding and charging of the shutter, mirror, and aperture mechanisms are completed, the switch is turned off. ASS is a changeover switch, and when the exposure control mode is M mode, switch ASS is set to O.
If you operate the data setting switches US and DS while in NL mode, the aperture value will change. Then, when the data setting switches US and DS are operated while the switch ASS is turned OFF, the shutter speed changes. As shown in the figure, one end of these switches is grounded, and the photometric switch S, AE lock switch ALS,
Reset switch SR8, mode selector switch MO3
, data setting switches US and DS are AND circuits ANo.
It is connected to the interrupt terminal INTo via. Therefore, the photometry switch S1, the AE lock switch ALS,
Reset switch SR8, mode selector switch MO
3. When either the data setting switch US or DS is turned ON, the microcomputer MCB starts an interrupt operation. Although not shown, the terminals of these switches on the non-grounded/grounded sides are pulled up to the power supply voltage VDD via pull-up resistors, and needless to say, chattering countermeasures are taken. ing. The drive circuit DDR receives control data from the microcomputer MCB via the data bus DDB. Then, the control data is decoded to control the four magnets RLMSAPM, ICM, and 2CM, and the motor control data is output to the motor control circuit MOD. Magnet) RLM is a release magnet, and when this magnet) RLM separates, the lock between the narrowing member and the mirror is released, the narrowing member starts narrowing down, and the mirror moves up. The magnet APM is an aperture magnet, and when the magnet APM separates, the narrowing member stops squeezing. Magnen) ICM and 2CM are shank magnets, and by separating these Magnen) ICM and 2CM,
The front and rear curtains of the shutter are respectively unlocked and the shutter curtains run. In addition, these magnet RLM
, APM, ICM, and 2CM are combination magnets made up of a permanent magnet, a coil, and an attraction piece, and the attraction pieces are separated when a current flows through the coil. The motor control circuit MOD controls forward/reverse rotation and stopping of the film feeding motor MOFI and the lens driving motor MOL based on data from the drive circuit DDR. The encoder ENAP detects the position of the crest blade, and the encoder ENLE detects the amount of rotation of the lens drive motor MOL, that is, the amount of drive of the lens. The output pulses of these encoders E'NAP and ENLE are sent to two AND circuits AN3, AN and an OR circuit OR2.
The microcomputer MCB
It is input to the count terminal CNT of. XB is a reference clock generation circuit, which is composed of a crystal oscillator and a capacitor. Further, the reference clock 5TCK output from the reference clock output terminal 5TCK of the microcomputer MCB is given to the photometry interface LIF and the A and F interfaces AIF. [Flash Circuit] FIG. 3 shows the flash circuit FL in FIG. 1. 2 is a block diagram showing a specific circuit of C. FIG. This circuit FL
C is provided in a flash device that can be attached to the camera body, and has nine contacts J. - Connected to the camera body via J8. Note that the contacts J0 to J form a data bus SDB in FIG. In FIG. 3, MCF is a microcomputer, and independently of the microcomputer MCB in FIG.
Controls C. ATS is a dimming mode selector switch, from OFF to O.
Each time it reaches N, the flash dimming mode switches from automatic to manual to automatic... In the =19- automatic light control mode, the flash light emission is stopped in response to the light control signal FSTP inputted from the flash light measurement circuit LMF via the terminal J6. VO8 is the irradiation range selection switch, and this switch ■
Every time C8 turns from OFF to ON, auto → 28+
nm → 3 5 tnrn → S Otnrn
→ 70 man → auto ・The panel in front of the light emitting unit moves and the irradiation range changes so that the 7 lashes of light cover the angle of view of the photographing lens having a focal length of 9 gin. Note that "auto" here means a mode that is automatically set to the focal length of the photographic lens used. For example, if the focal length of the photographic lens used is 35 man, each time the switch VC8 is turned on, the distance changes from 35 mm to 28 lllm-+351LIII.
-150+nm-+Man-+ 35 +a+L1
The irradiation range changes so that the 7 lashes of light cover the angle of view of the photographic lens having a focal length of 0.01°. Also,
When using a zoom lens, if the switch VC8 is operated and set to auto, the irradiation range will automatically change as you zoom. ME6 is a light emission mode changeover switch, and each time this switch MES is turned from OFF to ON, the light emission mode is switched from forced light emission to automatic light emission to non-light emission to forced light emission, and so on. As shown in the figure, these switches ATS, VC8, M
One end of ES is grounded, and the other end is an AND circuit AN.
6 is connected to the interrupt terminal INTAI of the microcomputer MCF. Therefore, these switches ATS,
, VC8, and MES are turned on, the microcomputer MCF performs an interrupt operation. Note that these switches ATSXVC8 and MES are also pulled up like the switch S0 shown in FIG. 1, and chattering countermeasures are taken. FDP is a display circuit and displays flash information. CHD is a charge indicator that indicates that main capacitor MC has been charged to a predetermined voltage (for example, 300V). However, this display is performed only immediately after data is sent from the microcomputer MCB and only when a flash display signal FD IS (described later) indicates the display. The FCD is a light control indicator, which operates for a certain period of time (for example, 3 seconds) after the light control signal FSTP is emitted from the flash light measurement circuit LMF, and displays a message to the photographer.
Informs that the flash has been fired properly. Note that the indicators CHD and FCD each include one LED that emits light of a different color. MDR is a motor control circuit that controls the drive of the motor MOF1. The motor MOFL moves a panel in front of the light emitting section in order to change the irradiation range. ZCP is a position detection circuit, which includes an encoder that outputs a signal according to the rotation of the motor MOFL, and detects the position of the panel moved by the motor MOFL. XF is a reference clock generation circuit, which is composed of a crystal oscillator and a capacitor. FCC is a 7-lansy control circuit, which is a signal ST for starting and stopping flash light emission by the flash light emitting unit XE.
A. Output 5TOP. CVG is a voltage stabilizing circuit, and is a battery BAF for DC power supply.
The voltage supplied to the microcomputer MCF is made stable even if the voltage of the microcomputer MCF changes slightly. Boost circuit D'D, l-flow diode I)I, main capacitor M C1 charge detection means NE, flash light emitting section XE
, the light emission control circuit XCC constitutes a well-known flash circuit. The light emission control circuit XCC is composed of a thyristor, a trigger circuit, a commutating capacitor, etc., and operates the trigger circuit in response to the light emission start signal STA from the Lancier control circuit FCC, and outputs a trigger signal from the terminal TR. output and excite the flash light emitting section XE. At the same time,
The thyristor is turned on to cause the flash light emitting section XE to emit light. In addition, the light emission control circuit XCC discharges the commutating capacitor in response to the light emission stop signal 5TOP from the 7 lash control circuit FCC, thereby turning off the cyrisk.
￥, and the flash light emitting section XE stops emitting light. The switching transistors TRo and TR control the operations of the external pressure circuit DD and the charge detection hand ViNE, respectively, by signals from the microcomputer MCF. In this embodiment, a neon tube is used as the charge detection means NE, and a xenon tube is used as the flash light emitting section XE. [Microcomputer Terminals] Finally, Tables 1 and 2 summarize the roles of each terminal of the microcomputer MCB and MCF (input/output signals, data, and operation of Hiiragi's system).

[Software Description 1] Next, control of the camera system of this embodiment will be explained. [Flags] Table 3 shows the flags used in this system and their 7
This is a table showing what the lags mean. In the same table,
The upper row shows the state where the flag is set, and the lower row shows the state where the flag is set.
The row represents the state in which the flag is reset. In addition, 7 lag AMF and STF are flash circuit FLC.
Used by the internal microcomputer MCF. And 7 lug ST
F is a dedicated
Attached to the camera body and transmitted from the camera body side.
It is set that the issue has been sent, and then the camera body side
The signal from the machine and the signal from manual operation are
If it is not input to the icon MCF, it will be reset. say
In other words, the flash device is part of the camera system.
The 7-lag STF is set and the flag is
The lash device is operating independently from the camera system.
When the 7-lag STF is reset, the 7-lag STF is reset. [Data] Table 4-1 shows the display data sent to the display circuit DSP.
, is a table showing the display contents of the data. Display circuit I
) The SP receives these data from the microcontroller MCE3.
Take it and find the memory inside the circuit DSP (RA-M)
and display those data using LCD display, LED, etc.
Display the information indicated by the data. For example, if the content of the data AFD is "101", the table
The microphone in the display circuit DSP is not provided in the viewfinder.
The LED lights up, allowing the photographer to obtain focus.
Let me know what happened. On the other hand, the content of the data AFD is “10
”, the microcomputer in the display circuit DSP
Blinks D to notify the photographer that focus/point detection is not possible.
Warning. In addition, data AVD indicating the control aperture value Avs
and the number of shots taken, CND, etc., are provided on the top of the camera body.
It is displayed numerically on the LCD screen. In addition,
In the display data AFD, ALD, AV
Information indicated by DXFLD, , FLD2, MOD, and TVD
Display is performed, and the display data A is displayed on the top of the camera body.
Table of information indicated by VD, CND, MODSSVD, and TVD
A demonstration will be made.゛Table 4-2 shows the display circuit FD in the flash device.
Indicates the display data sent to P and the display contents of that data.
This is a table. The display circuit FDP is located inside the camera body.
Similar to the display circuit DSP, these data are sent to the microcomputer MC.
When the receiver is taken from F, the memory (RAM) in the circuit FDP is
), and the data is displayed on the LCD display.
Display information. For example, this display may
located on the back of the device. In addition, display data FN
D and ■SD are the films sent from the camera body.
Shows sensitivity and control aperture. In addition, display data FD
D is the aperture value and film sensitivity from the camera body, and
Calculated from the maximum and minimum luminous intensity determined by the irradiation range when
The interlocking range is shown based on the calculated interlocking distance. and display
The top focus of Data FZD has an auto irradiation range.
Time is 1, manual (2'8+nm, 35+n+n,
50mm, 70mm), 0 is stored and the lower
Data indicating the irradiation range is stored in 3 bits. Table 5 shows the relationship between the microcomputer MCB and the flash circuit FLC.
What data is transferred between and what does that data mean?
This is the table shown. As shown in the same table, these data
, are all 8 bits. Data CFR, ~CFR, is sent from the microcomputer MCB.
This is the data sent to the flash circuit FLC, and the data FC
Ro, FCR, from the flash circuit FLC to the microcomputer M
This is data sent to the CB. Data CFR, top 2
Bin) CF R07 and CFR06 are exposure control mode controls.
It is compatible with the register MOR, and its contents include display data.
Same as MOD (see Table 2). Data CFR3
Top Pitch) CFR. 7 (SYS) at system reset, i.e. reset
It is set only when the switch SR8 is pressed, and other
It is reset when . 7th bin of data CFR3
)CFRse corresponds to the display signal FDIS, and
Display circuit FDP and display CHD in rush circuit FLC
Set to prohibit display by
It is reset when 6th bit of data CFR3
C.F.R. 5 (FNS) is when the flash is allowed.
is reset and set when disabling flash firing.
will be played. Upper 2 bits of data FCRo FCRO2,
08 (FMR) indicates the flash emission mode.
This is the same as the display data FMD shown in Table 4-2.
, "00" is forced flash mode, "01" is automatic flash mode.
"10" represents OFF. Data FCRo 6th
The digit bit FCR, 5 (RDY) is the flash circuit FL.
The charging voltage of the main capacitor MC in C is a predetermined voltage (
It is set when the voltage reaches 300V) and the battery is fully charged.
Ru. 5th bit FCR of data CFR0, (OK)
flashes in response to the dimming signal FSTP in automatic dimming mode.
It is set only for a certain period of time after the flash light emission stops.
and reset at other times. Data FCRo 4th
The digit bit FCRo, (FON) is created by the flash device.
If the camera is running, the flash device may be attached.
, and if the power is turned on, it will not be set.
Ru. The lower 6 bits of f-9CF Ro are the ISO of the film.
It represents the sensitivity Sv, and the data CFR, , CFR2 are
, respectively, the focal length of the photographic lens used Fv1 aperture
It represents the value Av. And the lower part of data CFR3
The 5 bits represent a light emission amount correction amount α (described later). Ma
In addition, the data FCR, is the maximum light emission amount of the flash device.
It represents IV. Note that the lower 3 bits of data FCR,
bits are unused bits (indicated by “trees” in the table).
). [Flowchart] 1 [Microcomputer MCB] Figures 4 to 29 show the main body of the camera system of this embodiment.
70-chi which shows the operation of the disk side (the operation of the microcomputer MCB)
It is a chart. [Interrupt INTol Photometric switch S1, AE locks inch ALS, reset
switch SR3, mode selector switch MO3, data
Press either the setting switch US or DS.
When turned ON, the interrupt pin INT0 falls;
4, follow the flowchart shown in Figure 4.
Then, the microcomputer MCB starts operating. First, the microcomputer MCB uses the reference clock generation circuit XB.
Activate it and connect the reference clock output terminal 5TCK to the reference clock output terminal 5TCK.
N$ 1) outputs 5TCK. After that, the microcomputer MCB connects the power control terminal P
, to L" and activate the voltage conversion circuit VG (#2)
. Next, the microcomputer MCB+*, this interrupt INT,
, identify which switch was activated
(#3, #10, #13, #15). In #3, the edge
If child P6 is “L”, the microcomputer MCB sets the photometry switch.
It is determined that an interrupt INTo has been placed by the operation of CH Sl.
Then, proceed to #4, and if terminal P6 is “H”, proceed to #10.
nothing. In #10, if the terminal P7 is “L”l, the master
The icon MCB is activated by operating the AE lock switch ALS.
It is determined that the interrupt INTo has been issued and proceeds to #11.
, if terminal P7 is “l]”, proceed to #13.Proceed to #13
Then, if the terminal P8 is “H-++”, the microcomputer MCB
interrupt INT by operating reset switch SR8.
It is determined that o has been applied, and I14 (subroutine “system
If the i child p8 is H++,
Proceed to Well 15. #15 (here, terminal P is “L”
If so, microcomputer MCB11, mode selector switch M
It is determined that interrupt INT0 has been issued by O3 operation.
Then, proceed to #16 (subroutine "mode conversion"). #1
5, if the terminal P is “H”, the interrupt INT is
, by operating the data setting switch US or DS.
The microcomputer MCB was forced to #17 (sub
Proceed to routine "Data conversion"). #14, #16, #
If you proceed to each of the 17 subroutines, from the subroutine
When it returns, it advances to the 5TOP routine and the microcomputer MCB restarts.
and waits until the interrupt INTo is issued. The interrupt INTo is interrupted by operating the photometry switch S1.
In #4, the microcomputer MCB
Determine whether the switch ALS is turned on or not.
Ru. If terminal P7 is “L”, the microcomputer MCB
is determined that the AE lock switch ALS is turned on.
Cut off and proceed to #5 to set the AE lock flag ALF.
Ru. #41 If terminal P7 is “H”, the microcontroller
In the MCB, the AE lock switch ALS is OFF.
So I decided to skip to Well 6. In #6, microcontroller M
CB is the COD light in the focus detection light receiving circuit AFD.
Initialize the sensor. And the microcomputer MCB
, start CCD integration (#7), and complete CCD integration.
(#8). After that, the microcomputer MCB connects the terminal P. to 'L'
Outputs the photometry start signal LSTA and connects the photometry interface L.
Activates the A-D converter in the IF and performs A-D conversion
Start the operation (#9) and proceed to the AE screen. Interrupt INTo by operating the AE lock switch ALS
is applied, the microcomputer MCB will activate the AE lock flag.
Set ALF #11), focus and point detection prohibited 7 lag
After setting F I HF (#12), set the AE seal.
Proceed to [AE routine] Figure 5 is a flowchart showing control in the AE screen.
It is. When entering this routine, the microcomputer MCB
Lens circuit LEC via real data bus SDB
Enter lens information 1 = (#21), then flash
7 runtime data FCRo, FC from the circuit FLC
R, #22), and from the display circuit DSP
Enter the TSO sensitivity of the film (#23>. Then,
The microcontroller MCB has a photometry interface LIF and a
Through the real data bus SDB, the photometric circuit 1-M
From A, measurements are made by each photodiode PD, -PD5.
Input the specified photometric data ('#24). and,
The microcomputer M'CB uses these data to
C# 25) that performs the operations. In addition, #24 (sub blue
Chin ``photometric data manual'') and #25 (subroutine
"Exposure calculation") will be explained in detail later (12th to 2nd
(See Figure 4). When the exposure calculation is completed, the microcomputer MCl3
Via the data bus SDB, the display data shown in Table 4-1 is
output the data to the display circuit (DSI) and display various photographic data.
Display ('#26). And similarly, Maiko
The MCB receives data via the serial data bus SDB.
CFRo-CF'R3 to 7 lash circuit FLC
Output (#27). Then, the microcomputer MCB
Set the output calculation completion flag AEF (28), #29
Proceed to. In #29, the microcomputer MCB performs a focus adjustment operation (hereinafter referred to as
AF operation) is completed. If the AF operation incomplete flag FDP is set, the camera
The icon MCB determines that the AF operation is incomplete, and
Proceed to P routine. Then set the flag FDP
If so, the microcontroller MCB will display A
Determine that there is, and proceed to #30. Regarding the AF routine,
The details will be explained later (see Figure 9). In #30, the microcomputer MCB is either shank release or prohibited.
'I'll determine whether it is stopped or not. Release prohibited
Stop flag RI I (If F is sent, the microcomputer
MCB determines that chanterelles are prohibited;
Proceed to the switch determination routine (Fig. 7). And 7
If the lug RI I-I F is reset, the microphone
The MCB determines that shirt release is permitted.
, proceed to #31. In #31, the microcomputer MCB performs focusing as described later.
Whether or not the AE lock was established as a result of the state being obtained.
Separate by tq. Flag B L FF hC set
If the microcomputer MCB has
(Therefore, I judged that AE Ronk was done and went to #32.
If not, switch judgment routine ■ (Fig. 6)
). In #32, the microcomputer MCB allows the photographer to operate the release.
Determine whether the Terminal P12 is “L”
If there is a microcomputer M CB, the user can press the release button.
I pressed it to the second stroke and the release operation became 91.
(Switch S2 was turned ON) and the subroutine
"Proceed to Exposure Control J (#33, see Figure 24) 1.
After that, when the shooting is completed, the switch discrimination routine ■ (Fig. 7)
). In #32, if terminal P12 is “■1”
For example, the microcomputer MCB allows the photographer to still perform the release operation.
It is determined that the switch is not turned on (switch S2 is OFF).
, proceed to the switch discrimination routine I (1\! Figure 6). −36= [Switch Discrimination Routine I] FIG. 6 is a flowchart showing the switch discrimination routine I.
It is. When entering this routine, the microcomputer MCB will
First, check the ON-OFF state of the photometry switch S1.
t41). If terminal P6 is “L”, the microcomputer MCB
determines that the switch S1 is ON and proceeds to #42. If terminal P6 is “11”, the microcomputer MCB will switch
It is determined that the switch S1 is OFF, and the process proceeds to #53. In #42, the microcomputer MCB prohibits focus detection operation.
Determine whether the Focus detection prohibition flag F
If the engineering HF is set, the microcontroller MC'B is the focal point.
It is determined that the detection operation is prohibited. And Maiko
M CBli:, 7 lug F ■ HF shunt) L (#4
3), Start CCD integration (#'44), CCD integration
Interrupt by completion I N'T. (#4'5). 'In #42, 7 lag F
If IHF is reset, microcontroller MCB is #4
Skip to 6. In #46, the microcontroller MCB is AE Rocks Inch A
Determine the ON-OFF state of LS. Terminal P7 is “L”
If so, the switch ALS of the microcomputer MCB is ON.
Judging that, proceed to R47, and if terminal P7 is “H”
, the microcomputer MC-B has the switch ALS turned off.
Make a decision and proceed to R51. In R47, the microcomputer MCB sets the AE lock flag AL
Determine the state of F. And 7 lug AL F is cent
If so, R50 is skipped and the flag ALF is reset.
It is set and proceeds to Orebo R48. The microcomputer MCB is
After setting 7 lugs A L and F on R48, set AE Lo.
This indicates that the AE lock by the lock switch ALS has been completed.
Reset the flag BLAF that indicates) to L (R49) and R50.
move on. At step 50, the microcomputer MCB resets the timer.
start and return to the AE screen (Fig. 5). In addition
, this timer starts when switch S1 or ALS is ON.
Measure the time after turning OFF, and set that time to the specified value.
The photometry operation continues until the time (for example, 10 seconds) is reached.
Exposure calculation, data input/output, and display continue. In R46, if terminal P7 is “H”, the microcomputer
The MCB determines that the switch ALS is OFF.
7-lug ALP and 7-lug BLAF
Reset (R51, #52). Then, reset and start the timer (R50),
, return to the E routine (FIG. 5). When photometry switch Sl is OFF in R41
, the microcomputer MCB sets the focus sick completion flag F1
Reset F (4$53). After that, Ma, Ikon M
The CB uses data to erase the display indicating the focus state.
100" is stored in the AFD (R54). And Len
Stop the motors MO and J- for driving the motors 1f ($55
), interrupts due to completion of CCD integration (NT) are prohibited (R
56). Therefore, even if the photometry switch S1 is OFF,
For example, no focus detection operation is performed. After that, microcontroller M
CB performs the processing below R57. In R57, the microcontroller MqB is the AIE lock switch.
Determine the ON-FF state of ALS. . Terminal P7 is
If “L”, the microcontroller MCB switches ALS to O.
,N, and sets focus detection prohibition 7-lag FIHF.
After hitting (R58), proceed to R59. In R59, the microcomputer MCB is AE lock 7 lug AL
Determine the state of F. AE lock flag ALF is reset.
If the microcomputer M CB is
After setting ALF (R60), set the AE lock switch.
7 lights indicating that AE lock by ALS has been completed.
Please reset the BLAF # 61 >, reset the timer.
(R50) AE seal (Fig. 5)
Return to On the other hand, AE lock 7 lug ALF is set in R59.
If the microcontroller MCB has been installed, the microcontroller MCB will
Kip and reset the timer to star 1, AE sill
- Return to (!@Figure 5). In R57, if terminal P7 is H”, microcomputer M
CB is A E Oy switch A L S y>r
OFF, i.e. switches S1 and A L
It is determined that both S are OFF, and the process proceeds to R62. In the R62, the microcomputer MCB has a focus detection prohibition of 7 lag F.
Reset the IF and switch S,, AL S
. Interruption due to operation of SR3, MOS, t, Is, D, S
After allowing INTo (#63), proceed to R64.
. In the well 64, the microcomputer MCB, as mentioned earlier,
Determine whether or not the current time has clocked a predetermined time (approximately 10 seconds)
If the specified time has not been counted, the AE sill will be displayed again.
– Return to main page for photometry operation, exposure calculation, data input/output, and
and display. The timer counts the specified time.
For example, the microcomputer MCB goes to the 5TOP routine (Figure 8).
advances, stops operation, and interrupt INTo is applied again.
Wait until [Switch Discrimination Routine■] Figure 7 is a flowchart showing the switch discrimination routine■.
It is. It is clear from the AE silhouette shown in the vJS diagram.
, the photographer presses the release button until the second stroke.
When exposure control is performed by pressing (#32→
#33) or if release is prohibited (
R30), the microcontroller MCB
Perform routine processing. First, the microcomputer MCB completes 7 orac locks with 7 lags.
F L Reset F and 7 lag BLFF, L ($7
1. $72), photometry switch S, 0N-OFF state
Determine (#73). If terminal P6 is “L”, the microphone
The MCB determines that the switch S1 is ON, and #74
Proceed to. #74 sets the release prohibition 7-lag RIHF.
and prohibits further releases. This allows shooting
Even if someone accidentally presses the release button and then releases it, the camera will not take a picture.
No shadow motion is performed and no film is wasted. Proceeding to #75, the microcomputer M CB will switch to the AE lock switch.
Determine the O'N-OF state of the ALS. Miko'> M CB is switched if terminal P7 is L''.
It is determined that the switch ALS is ON, and the process proceeds to #76, where the terminal
If P7 is H'“, the switch ALS is OFF.
Make a decision and proceed to #79. In #76, the microcomputer MCB is AE Ronc 7 Lug AL
Determine the state of F. Make sure the flag ALF is set.
Then, the process returns to the AE routine (FIG. 5). - direction, flag ALF
is reset, the microcomputer MCB sets flag A.
After setting LF (#77), reset 7 lag BLAF
(#78) and return to the AE routine (Fig. 5). In #75, the microcomputer MCB is the AF port, Kusuinochi.
If you decide that ALS is OFF and proceed to #79
AE long 7 lug A L F and 7 lug BLAF
After resetting ($79.80), the AE routine
Return to (Figure 5). In #73, if terminal P6 is “H”, the microcomputer
MCB determines that photometry switch S1 is OFF.
and data AF'D to erase the display indicating the focus status.
"00" is stored in (#81). And reset the release prohibition 7 lag RI HF.
#82), allow future chanterelles and go to #83
move on. Proceeding to #83, the microcomputer MCB selects the AE Ronx switch.
The ON-OFF state of CH AL S is determined. The microcomputer MCB switches switch A if terminal P7 is “L”.
Determines that LS is ON and prohibits focus detection with 7 lag FI
After setting HF (#84), proceed to #85. on the other hand
, if terminal P7 is “H”, the microcomputer MCB
It is determined that the latch ALS is OFF, and the 7-lag FIHF is
Reset (#88) and go to STOP routine (Figure 8)
move on. In #85, the microcomputer MCB sets the AE lock flag ALF.
Determine the state of. If flag ALF is set
Return to the AE routine (Figure 5). - On the other hand, the flag ALF is
If it has been reset, flag ALF is set (#
86) After 7 lags, reset B xl AF #87
), return to the AE routine (Fig. 5). By the way, the AE routine, switch discrimination routine ■,
The AE lock switch is
When ALS is turned on, or when AE locks
Switch ALS to OFF on -day to cancel AE block.
Then, turn on the AE lock switch again and
E-flock may be performed. On the other hand, AE Frock is A.
Photometry at the moment the E-lock switch ALS is turned on
Values need to be locked. Camera system of this example
Now, when the microcomputer MCB detects the above two cases (
#47. #58. #76, #85), AE Ronxin
7 Indicates that the AF operation has been completed.
Rear BLAF lug (#49, #[30, $78
．． [7), the photometric value obtained immediately after that is locked.
. Therefore, in the above two cases, especially the latter case,
AE flocking is performed accurately. [5TOP Routine] Figure 8 is a flowchart showing the 5TOP routine.
Ru. When entering this routine, the microcomputer MCB first
Data FCRo, FCR, from flash circuit FLC
Enter (#91). Next, the microcomputer MCB controls the exposure control of this camera system.
Determine the control mode. First of all, exposure control mode is set to M.
It is determined whether the mode is set (#92). exposure control
If the content of Renostar MOR is "11", the microcomputer M
CB determines that it is in M mode and skips to #97.
. In #92, the microcomputer MCB switches to exposure control mode.
is determined to be not in M mode, then the exposure control mode is set.
It is determined whether the mode is S mode (#93). Re
If the content of START MOR is “01”, the microcomputer
The MCB determines that it is in S mode and skips to #96.
Ru. At #93, the microcomputer MCB controls the exposure.
mode is not S mode (i.e. M mode, S mode
control exposure time Tv.
To erase the display, blank the display data TVD.
The display data BLD is stored (#94). And dew
Determine whether the output control mode is A mode (#
95). If the content of Renostar MOR is "10",
Ikon MCB was determined to be in A mode and #97 Hesuki
Tup. In #95, the microcomputer MCB sets the exposure control mode to A.
mode, that is, exposure control mode.
When it is determined that the mode is P mode, the control aperture value Av is
To erase the display, display a blank on the display data AVD.
Store data BLD. Thereafter, the microcomputer MCB proceeds to #97. To summarize the processing of #92 to #96 above, it is as follows.
Ru. In other words, if the exposure control mode is P mode, the control
The display of the aperture value Av and control exposure time Tv is erased. If the exposure control mode is S mode, the control aperture value
The display of Av is turned off and the control exposure time T is set in A mode.
The display of v is erased. Also, the exposure control mode is M mode.
If so, display of control aperture value Av and control exposure time Tv
are not deleted. Therefore, manually set
Only aperture value A vs S exposure time T vs is displayed and calculated.
The calculated frit value Av and exposure time Tv are not displayed.
Become. Proceeding to #97, the microcomputer MCB
In order to erase the display indicating that
Store “0” in D, and then display the focus status.
To erase it, store "100" in the display data AFD.
(#98). In #99, the microcomputer MCB is a flash circuit FLC.
Determine whether the dimming signal FSTP is output from
do. Data FCRo from flash circuit FLC
If the 5-bit FCRo is “1”, the microcomputer MCB
determines that the dimming signal FSTP is being output, and #10
Go to 0. In #100, the microcontroller MOB uses flash
Display data is displayed to indicate that dimming has been performed.
Store “10” in FLD1, and then store “10” in other flash memory.
In order to erase the display showing the
"00" is stored in (#101). And the microcomputer
The MCB is connected to the display circuit via the serial data bus 5l)B.
Display data is output to the optical DSP (#102). Display times
When the display data is input, the DSP displays the display data.
Display the information indicated by the data. Then, the microcomputer MCB again performs the processing from #91.
Let's do it. At #99, the data from the flash circuit FLC is
5th bit of FCRo y) If FORRo4 is “0”, the master
If the dimming signal FSTP is not output for the icon MCB,
Judgment mouth, make all 7 rash information display disappear
In order to display data FLD1 and FLD2, respectively,
Store “00” (#-48=103). And display 1 circuit in the flash device
To stop the display on FDP and display CHD
, 7th bit of data CFR3) Set CFR36
(#104). After that, the microcomputer MCB uses the serial data bus SDB.
Output the display data to the display circuit DSP via #10
5), Flash data CFR. ~CFR, is output to the flash circuit FLC (#10
6). This allows the display circuit DSP to display the data indicated by the display data.
Display circuit FDP that displays information and is located in the flash device
and the operation of the display CHD stops. Next, the microcomputer MCB has terminal P. Outputs H from
to turn off the A-D conversion start signal LSTA and turn off the photometric ink cartridge.
The operation of the A-D converter in the base LIF is stopped.
($107). And the microcomputer MCB is all
After re-centing 7 lugs (#1011), power controller
Control terminal P5 outputs “H” and converts the voltage.
Stop the operation of the road\'G ($109). This results in
, AF interface AIF, focus detection light receiving circuit AF
D, photometric interface LIF1 photometric circuit LMA, flash
Flash light measurement circuit LMF, lens circuit LEC, drive
, the operation of circuit DDR, encoder ENAP, ENLE is
Stop. Then, the microcomputer MCB interrupts INTo
#110), output of reference clock 5TCK
At the same time, the operation of the reference clock generator circuit XB is stopped.
The motion is stopped (#111). And the microcomputer MCB
is again, Sui Nchi S, ALS, SR3, MO8,
Until the interrupt INTo is applied by tJS, DS operation.
Wait there. [Interrupt INT,] Figure 9 shows the CCD lamp in the focus detection light receiving circuit AFD.
Insensor I SLo, I SL,, I SL2 CO
An interrupt INT was issued due to the completion of D-integration.
It is a flowchart which shows subsequent processing. As mentioned earlier, the CCD line sensor l5Lo. When the CCD integration of ISL, , l5L2 is completed, the AF input
The interface, MF is the terminal I of the microcomputer M CB.
Outputs “L” level integration completion signal AFFN to T.
. From this point, the microcomputer MCB follows the flow shown in Figure 9.
Works according to chart. First, the microcomputer MCB checks whether the exposure calculation has been completed.
Distinguish the squid (I1ooi). Exposure calculation completion flag A
EF is set and the microcontroller MOB is exposed.
After determining that the calculation is complete, the AF routine (#121
>, and if the flag AEF is reset, Russia appears.
It is determined that the calculation has not been completed and the process proceeds to $1002. $1
In 00.2, the microcomputer MCB sets the AF operation incomplete flag.
Set FDP and process when interrupt INT is issued
Return to the previous step. This is - degrees, for exposure control.
This is the corner for performing calculation operations and displaying data.
. Then, perform photometry, calculation, and display operations as described above.
After that, immediately return to the AF routine (Figure 5 #2
9). [AF Routine 1 Explain the AF routine to the dog. The mass, microcomputer MC'B sets the AF operation incomplete flag F.
Reset DP ($121). Next, CCD la
Each screen of insensor I SLo, I SL, I SL2
Input the raw data (SL22), and from those data,
Zone 0! Focusing on 81 zone and 2nd zone
Detection of state and defocus direction, amount of defocus
Perform calculations (#123, 1124, #125). that
From this, it is checked whether focus detection is possible (I 126). As a result, focus detection is possible even in one of the three zones.
If it is possible, proceed to #133 and perform focus detection in all zones.
If this is not possible, proceed to #127. In #127, the microcomputer MCB is already a low concert
Determine whether a check has been performed. Low con search completed
If the completion flag DDEF has been reset, the microcontroller M
The CB determined that no low-conference search was conducted, and #
Proceed to step 132 and perform a low con search. On the other hand, the flag
If DDEF is installed, the microcontroller MCB will
Determined that a low-conference search has already been carried out, #129
Proceed to. At #129, the microcomputer MCB again starts the COD product.
INT is started (#130). Then warn the photographer that focus detection is not possible.
"10" should be stored in the display data AFD in order to
), proceed to the AE routine (Fig. 5). I want to do it, - degrees
, after the low-con search has been carried out, the low-con search
is not carried out. Note that the microcomputer MCB is a low-conserver.
The rQ field + ($F 132) that conducts the search is also low
When the concert is completed, the program proceeds to the AE routine. In #126, there is a focus detectable zone and #1
Proceeding to step 33, the microcomputer MCB is performing a low contrast search.
Determine whether the Low control 7 lag LCF is reset.
If it is, the microcontroller MCB is searching for low-contrast information.
It is determined that there is no focus, and the process proceeds to the focus detection routine (FIG. 10). On the other hand, at $133, a 7-lag LCF is set.
If so, it is determined that the microcomputer MCB is performing a low control search.
Cut off and proceed to #134. In #134, the microcomputer MCB is the lens drive motor.
Stop the MOL and reset the low-contact plug LCF.
Set ($13.5). As described below, loco
During the search, the lens is always moving, so #134
When the lens drive motor MOI- is stopped at
CCD line sensor ■SLo, I SL,, I SL2
Focus state and defocus determined from each pixel data of
The direction and defocus amount correspond to the actual lens position.
It is not reliable and has poor reliability. Therefore, microcontroller M
CB performs COD integration again while keeping the lens position fixed.
Start ($136) and enable interrupt INT.
($137), proceed to the AE routine, and read the CCD light again.
I'm trying to get pixel data from an in-sensor. So
A warning that focus detection is not possible is displayed.
If so, the microcomputer MCB changes the display to make the display visible.
Store “00” in the display data AFD (9,138), AE
Proceed to the routine (Figure 5). [Focus detection and interrupt CN, T] FIG. 10 shows the focus detection routine and counter interrupt CN.
It is a flowchart showing processing when T is applied.
. In the focus detection routine, microcontrollers M and CB perform focus detection.
Performs focus movement and focus judgment movement. When proceeding to the focus detection routine, the microcomputer MCB first
Zone where focus adjustment should be performed (hereinafter referred to as main zone)
is selected from zones 0 to 2 (#141). Maiko
As a general rule, MCB is set at the zone where the closest subject is located.
zone (the zone in the rearmost bin) as the main zone.
Ru. Also, needless to say, there is no focus detectable zone.
If there is only one zone, adopt that zone as the main zone.
Ru. Regarding the method of zone selection, the applicant shall first apply.
This is shown in Japanese Patent Application No. 125489/1989. Next, the microcomputer MCB has zones other than the main zone.
It is detected whether or not it is a proximity zone (#142). sand
In other words, the main zone selected in #1 and 41 is in that zone.
The subject (hereinafter referred to as the main subject) within the
whether there is a subject (hereinafter referred to as a close subject)
Detect. Note that the close-up subject here refers to the original
1 means the same subject as the main subject;
The defocus amount for the body is a predetermined value (8 in this example).
If it is less than 0μl11), the microcomputer MCB
The subject is determined to be a close subject. Specifically, a portrait (with a face that fills the entire screen)
At imaging magnification β = 1/10), 2c + n (at the height of the nose)
If the distance difference is less than (equivalent), the subject is a close subject.
It is determined that Also, waist shot in horizontal position
For the portrait (β=1/40), 14c+11(
(equivalent to the length from the tip of the nose to the ears) if the distance difference is
, the subject is determined to be a close subject, and a group of several people are photographed.
In the photograph (magnification β = 1/100), it is 95cm (before photography).
(equivalent to the length from the face of the person in the row to the face of the person in the last row)
If the distance difference is as follows, the subject is a close subject.
It is determined that The presence of the main zone and nearby objects detected in this way
data corresponding to the zone (hereinafter referred to as the proximity zone)
The microcomputer MCB memorizes the data, and as described later,
Microcontrollers M and CB perform photometry calculations based on this data.
select. Next, the microcomputer MCB selects the main zone selected in #141.
Determine whether the subject image within is in focus.
(, $143). If it is not in focus,
Ikon MCB calculates the lens drive amount from the defocus amount.
(#144). Next, the microcomputers MC and B
Calculate the distance to the subject and the shooting magnification β ($1
45. , $L4[3]. Here, calculate the distance to the main subject and the shooting magnification β.
The method will be described. If the lens drive amount is N and the defocus amount is DF, then the relationship of N=KXDF' (1)
A relationship is established. Here, K is called the conversion coefficient (i′,
It is a constant that is specific to the lens. And my
The converter MCB converts this conversion coefficient K into the lens circuit LEC.
Enter. For details on this conversion coefficient, for example,
, as shown in Japanese Patent Application Laid-Open No. 59-142528. So
Then, shoot distance. As is well known, Do=ni/no (2) k=
n4” (3) 11o:Re
Lens drive amount r from the infinity position of the lens: focal point of the lens
Distance a: Represented by a constant. In addition, the constant and the focal length f of the lens are
It is input from the lens circuit LEC. The one power I have is focus
The shooting distance at the position where the detection was performed2, its apex
The value is Dvl (input from the lens circuit LEC power),
If the amount of lens drive from the lens's infinity position is 111, then
, Dvl=21og2D+
(4) D,=ni/n,
The relationship (5) holds true. On the other hand, the focus adjustment
Since the lens drive amount for
Lens drive in2 from position to focus position is ++ 2
= 11, ±N (6) and
Become. However, for double numbered persons, + when in the front bin and when in the back bin.
It is key. Therefore, from equation (2), shooting at the in-focus position
The distance D, that is, the distance to the main subject, is D=/n2 (7)
. Then, the apex value Dv is calculated as in equation (4).
, Dv=2101?2D (8
). Also, the photographing magnification β is calculated from β=f/D (9).
Melt. Next, the microcomputer MCB calculates the lens movement obtained in #144.
Set the number of pulses N corresponding to the amount of movement in the event force counter.
#147L Enable counter interrupt CNT ($1
48). As will be described later, normally, terminal P15 is
“L” is output from the encoder ENLE.
These pulses can be input to terminal CNT.
. The microcomputer MCB sends data to the drive circuit DDR.
The lens drive motor MOL is activated to drive the lens.
(#149). And the microcomputer MCB
, the step being processed when the interrupt INTo was called
Return to In addition, the AE routine (Fig. 5) $29
The microcomputer MCB determines that the AF operation is incomplete.
If you proceed to the AF routine, return to the AE routine.
, performs the processing from #21. In addition, input only the constant from the lens circuit LEC, and set the focal point.
Camera system that does not input the distance Dv of the detected position
If it is
The amount of lens drive from infinity is always monitored.
A counter is provided to monitor, and based on the current count value n1,
Lens drive amount I+ from infinity position to focus position
2-++ 1±N is calculated, and the distance of the focus position is calculated from the driving amount n2.
You may also do so. In #143, if the microcomputer MCB is in the main zone
When it is determined that the subject image is in focus,
In other words, the subject image within the main zone selected in #141
If the defocus amount is less than a certain value (for example, 30μ+n)
If the microcomputer MCB determines that the
The microcomputer MCB will display that it is in focus.
Therefore, "01" is stored in the display data ΔFD. So
After that, the microcomputer MCB adjusts the lens position where focus detection was performed.
distance information D from the lens circuit LEC at the
The amount of lens drive from the infinity position when
From the distance information (r) and focal length information (r) obtained from
Calculate the shadow magnification β (#151). And the microcomputer MCB has 7 orcus locks and 7 lag F.
Set LF #152), AE routine (Figure 5)
Proceed to. Therefore, once the in-focus state is obtained, the microcomputer
After that, MCB does not perform COD integration and
will proceed to the AE routine without allowing INT.
. Next, the counter interrupt CNT will be explained. The event counter built into the microcomputer MCB is connected to terminal C.
Count the pulses input to the NT and set the number of pulses.
When the specified number is reached, the event counter will
Apply the included CNT. As a result, the microcomputer M CB #
161. First, the microcomputer MCB is
The interrupt CNT of
It is determined whether it is applied at a deviation. sand
That is, the microcomputer MCB receives the pulse input to the terminal CNT.
The signal can be emitted from either encoder ENAP or ENLE.
Determine whether the If terminal PI5 is “I4”, the pulse is encoded.
emitted from the reader ENAP, i.e.
The microcomputer MCB determines that the loading operation is in progress, and #16
Proceed to step 6 to send data to the drive circuit DDR and set the aperture control.
Gunen) to alienate APM. This allows filtering behavior.
The production will be stopped. Then, when the interrupt CNT is turned off, the microcomputer MCB
Return to the step that was being processed. On the other hand, if the terminal P I5 is “L II”, the pulse
is emitted from encoder ENLE,
In other words, the microcomputer MCB determines that the AF is in operation,
Proceed to #162' and send data to the drive circuit DDR.
and stops the lens drive motor MOL. and
, proceed to #163. In #163, the microcomputer MCB determines the lens movement amount N.
Fixed value N. Determine whether it is larger or smaller than. lens
If the movement amount N is large, the defocus amount must be calculated.
Then, u (#144) has a large amount of defocus, and the image
This means that the entire image is blurred. Therefore, two
There is a large error in the defocus amount in the case of
High probability and low reliability. Therefore, in this example,
In the above case, the lens movement ff1N is larger than the predetermined value N0.
If it floats, start CCD integration again (#164)
Enable the interrupt INT (#165), and the in-focus state can be obtained.
I am checking to see if it is correct. This improves AF accuracy.
go up Microcomputer M CB allowed interrupt INT.
After (#165), process when interrupt CNT is applied.
Return to the previous step. In #163, the lens movement amount N is less than or equal to the predetermined value No.
If the microcomputer MCB determines that
The focus amount has little error and is considered reliable.
Proceed to #150 without checking the state of focus, and proceed as described above.
($150~#152), and then apply the AE seal (
Proceed to Figure 5). As mentioned earlier, once the in-focus state is obtained, the CCD integral can be
AE Silence without allowing interrupt INT.
- After that, the AP routine (the
It does not proceed to Figure 9). In other words, -d, the in-focus state is
Once obtained, turn off the photometry switch S1 and turn it on again.
and turn ON and apply interrupt INTo, thereby causing the CCD
Integration is started (#7) and interrupt INT is enabled.
AF axis operation will not be performed until (#8). paraphrase
If the photometric switch S1 is kept in the ON state, the so-called
7 Orcus lock is performed. i.e.
, the camera of this embodiment performs one-shot AF operation.
. “Low con search” Figure 11 is a diagram showing the subroutine “Low con search”.
It is a low chart. In this subroutine, the microcomputer
First of all, is the MCB conducting a low-conference search?
('#'17'1). low contrast 7ra
The LCF has been reset and the microcontroller MCB is
I decided that I was not in a low-conference search and proceeded to $172.
After setting the 7-lag LCF, connect it to the drive circuit DDR.
Output the data and operate the lens drive motor MOL.
and start the low core search operation ($173). one
On the other hand, $1711 was set aside and the flag L'CF was sent.
If so, the microcomputer MCE3 is running low-con search.
It is determined that there is, and skips to #174. When proceeding to $174, the microcomputer MCB starts CCD integration.
and interrupt I due to completion of CdD integration.
NT ($175). Next, the microcomputer MCB has the lens at the end of its movable range.
($176). This judgment is made if a pulse is input to terminal CNT within a certain period of time.
This is done by determining whether the Len
When the lens reaches the end of its range of motion, the lens cannot move any further.
Therefore, the pulse from the encoder ENLE is
The sound cannot be emitted. Therefore, for a certain period of time, terminal dNT
If no pulse is input to
It can be determined that the movement has reached the end of its movable range. In addition, Len
ON or OFF when the lever reaches the end of its movable range.
A switch is provided, and the ON-〇FF status of the switch is set.
The lens has reached the end of its movable range by detecting
). At $176, the lens has reached the end of its range of motion.
If the microcomputer MCB determines that there is no
Check the ON-OFF state of the optical switch S1. My
If "L" is input to the terminal P6, the controller MCB will switch.
It is determined that switch S1 is ON, and the value returns to $176, and the end
If H++ is input to child P6, switch S1 or OFF
Determine that it is F' and proceed to $180. At $176, the lens has reached the end of its movable range.
When the microcomputer MCB determines that, the process advances to $177. $
In 177, the lens reached the end of its movable range once.
Determine whether it is the first time or the second time. If this is the first time the lens has reached the end of its range of motion.
, for the microcomputer MCB, proceed to $182 and install the drive circuit D.
Output data to DH and reverse lens drive motor MOL
make it turn Then, it returns to $176, and the low contrast in the opposite direction
Perform a search. For $177, the lens has a movable range.
The microcomputer MCB determines that this is the second time that the terminal has been reached.
When the data is set, the data is output to the drive circuit DDR and the lens is
Stop the engine drive motor MOL ($178). This operation can be briefly explained as follows. The microcomputer MCB moves the lens in one direction from its current position.
(for example, in the direction of the nearest neighbor) and perform a low consonance search.
. Then, the in-focus point cannot be detected and the lens is turned off.
When the end of the moving range (for example, the closest position) is reached, the
Con MCB moves the lens in the opposite direction (for example, towards infinity)
8 - Search from the first position to the other end (e.g.
Low-contrast search of the area up to the infinity point (focusing position)
Do this. This allows for low-contrast search throughout the entire range of motion.
It is done. As a result of low contrast search, focus detection is possible.
position is not found and the lens is placed in another end position (e.g. null).
When the lens reaches the maximum focusing position), the lens stops driving.
and exit Lawcon Search. If you stop the lens drive motor at $178
, the microcontroller MCB has undergone a low-contrast search.
The low contrast search completion flag DDEF is used to remember the
The set price is $179), and a low con search is being conducted.
Reset the low control 7 lag LCF to indicate that there is no
($180) and return to the AF routine (Fig. 9). [Subroutine 1 in the AE routine Next, the subroutine in the AE routine (Figures 12 to 2)
Figure 4) will be explained next. ``Photometric data input'' Figure 12 shows the subroutine in the AE routine (Figure 5) [
70-Chart showing photometric data human power J ($24)
It is. In this subroutine, the microcomputer MCB
Measurement of light incident on Otodai Auto PD, -PD5
value, photometric interface LIF, serial data bus
Input data from input/output terminal 5IOo via SDB.
Three registers depending on the state at the time of input (AE Ronc, etc.)
Store photometric data in FLR, NMR, and ALR. Mass, microcomputer MCB is AE lock switch/AL
It is determined whether S has been turned O or N (I2.1). A
If the E-lock flag ALF is set, the microcomputer
The MCB determines that the AE lock switch ALS has been turned on.
Cut off and proceed to #2o7, flag ALF is reset.
Here I am, the AE port/link switch ALS is turned on.
I judge that there is no one there and proceed to well 202. Flag ALF is set.
Even if the 7 lug B L A F is set in #207
It has been installed and there is already one AE long switch ALS.
When the AE lock is completed, the microcomputer MCl3
If the judgment is I, proceed to #202. At $202, the microcomputer MCB has 7 Orcusroncs completed.
Determine whether it has been completed. Focus Ro 7 Khufu
If the lag FLF is set, the microcomputer MCB will
Determining that focus lock is complete, proceed to I203
If the 7-lag FLF has been reset, the focus
It is determined that the lock has not been completed and the process proceeds to #206. Proceeding to #203, the AE rotor due to the focus state
Determine whether the check is complete. If 7-lag BLFF is set, microcontroller M (1
1. AE lock is completed due to focus state on B.
Judging that it is, advance to I206-3 and 7 lag BLFF
If has been reset, AE lock has not been completed.
Judging that this is the case, proceed to #204. In #204, the microcomputer MCB confirms that the in-focus state has been reached.
7 lags to indicate that the AE lock is complete.
Set BLFF and send photometric data to 7 orcus AE lot.
Store it in the Crenostar FLR and execute the AE routine (#2 in Figure 5).
Return to 5). In #206, the microcomputer MCB sets the photometry data to normal.
Store in register NMR and execute AE routine (#25 in Figure 5).
) Return to In #207, A by the AE lock switch ALS
Microcontrollers MC and B determine that E-lock has not been completed.
Then, proceed to #208 and turn on the AE lock switch ALS.
7 lag BL to indicate that the AE lock has been completed.
Set the AF and transfer the photometric data to the AE Lock Reno Star AL.
Store it in R and return to the AE routine (#25 in Figure 5). As mentioned above, register ALR has A and E lock switches.
The photometric data immediately after the switch is turned on is stored and stored in the register.
The FLR stores the photometry data immediately after the camera is in focus.
All photometric data obtained at other times are stored in register N.
Stored in MR. "Exposure calculation" Figure 13 is a subroutine in the AE routine (Figure 5).
[This is a flowchart showing exposure calculation J ($25). In this subroutine, the microcomputer MCB first
Although the AE lock was activated by the E-lock switch ALS,
(@221) 7 lugs B L A F
If the cent is sent, the microcomputer MCB ji A E
AE mouth and neck are made by ALSi Koyoru
Judging that it was, I proceeded to #222 and moved to AE Rock Reno Star A.
L Ri: The stored photometric data is divided into six photometric data.
The data is stored in the data storages Bvo-Bv5. In addition, Regis
The photodiodes P and BVO and BVS each have a photodiode P
The photometric value obtained by D, -PD5 is stored. On the other hand, in #221, 7 lag BLAF is recent.
If it is, the microcontroller MCB is the AE long switch.
It is determined that AE lock is not performed by ALS, and #
Proceed to 224. In #224, it became in focus.
It is determined whether or not an AE Ronque has been performed. 7 lugs
If BLFF is set to Sera), the microcontroller MCB is A.
Determining that E-lock has been established, proceed to #225 and complete the 7-o
The photometry data stored in the Kass AE Ronklenosta FLR
The data is stored in registers Bvo-Bv5. Also, 7 la
If the BLFF is re-centered, the microcontroller MCB
The AE lock due to the focus state has not been completed.
Determining that the
The photometric data stored in the register BVO-BV
Store in S. Then, the photometric data is stored in registers Bvo-Bv.
When finished, the microcomputer MCB switches the photodiode PDo
-PD5 light receiving area, optical characteristics, open aperture, open photometry
Errors, etc. (open aperture value and open metering error are determined by lens circuit LE)
(input from C) is corrected ($223). As is clear from the above, the camera system of this example
In this case, the AE lock is activated by the AE lock switch ALS.
will be given top priority. After completing the correction of the photometry data Bvo-Bv5, the microcomputer
MCB has AE lock with AE lock switch ALS.
It is determined whether it has been done (#227). 7 lugs BL
AF is set and the AE lock switch ALS
The microcomputer MCB determines that the AE lock is set.
Then, proceed to #228. In #228, the microcomputer MCB controls the light emission of the flash device.
Determine the mode and FOR the upper 2 bits of data FCRo
o7. FORRo6 is not “oo” and the flash device is strong.
If it is determined that the flash control mode is not set, the sub-blue will appear.
Chin: Proceed to Spot Metering J ($259).
It is determined that the AE Ronq is performed by the ALSi.
Or, in #228, if the 7 lash device
If the flash mode is determined to be forced flash mode,
Processing from #230 onwards is performed. Namely, AE Rocks
The AE lock is activated by the switch ALS, and the flash flashes.
Only when the forced flash mode is not the forced flash mode,
The control MCB proceeds to the subroutine "spot photometry". In addition, as described later, in P mode, the forced flash mode is activated.
Therefore, when in P mode, the AE lock switch AL
When you operate S to perform AE lock, it becomes spot metering.
. In #230, the microcomputer MCB calculates the imaging magnification β.
Determine whether the If shooting magnification -75=β has been calculated, the microcomputer MCB goes to #231.
is determined by the photographing magnification β and the focal length f of the photographic lens.
The brightness Bvs and brightness of the main subject are calculated by
and the background brightness Bva. On the other hand, if the imaging magnification β has not been calculated yet, #24
Proceed to step 2 and set the brightness Bvs of the main subject and the brightness Bva of the background.
demand. Note that the photographing magnification β is the focus detection routine (Fig. 10).
Until it is calculated in step #151, the imaging magnification β is 1/
60 and no photographic lens is attached.
Alternatively, the process may proceed from #230 to #242. At this point, the presence or absence of the photographic lens is determined from the lens circuit LEC.
This can be determined using the following data. In #231, the microcomputer MCB sets the imaging magnification β and a predetermined value.
Compare the magnification β2 (for example, 1/40), and if β>β2
If so, proceed to #232 and perform “Bvs performance WI” to
Find the brightness Bvs of the subject. As described later, “Bv
s operation I, the microcomputer MCB calculates five photometric data.
Obtaining the brightness Bvs of the main subject from BVo-Bv4
Therefore, the background brightness Bva can be found from the photometric data Bv5.
(#233). In #231, if β≦β2, the microcomputer MC
B proceeds to #234 and sets the photographing magnification β and the predetermined magnification βj (
βl<β7, for example 1/60), and β>β1
(That is, β1 × β × β2), the process advances to #235. In #235, the microcomputer MCB determines the focal length of the photographic lens.
distance f and a predetermined focal length f1 (for example, 28+n+n)
If f>f, proceed to #236 and select “Bvs
The brightness Bvs of the main subject is determined by performing calculation ``2''. rear
As mentioned above, in "Bvs operation■", the microcomputer MCB
is the brightness of the main subject from the three photometric data BVO-BV2.
Since we are looking for the brightness Bvs, the background brightness Bva is
It is obtained from the data By3 to By5 (#237). Also
, if f≦r1 in #235, the microcomputer M
CB proceeds to #242. If β≦β1 in #234, the microcomputer MCB
Then, proceed to step 238 and set the photographing magnification β and the predetermined photographing magnification β. Compare with (β.〈β1 × β2, r in other words 1/100)
And β〉β. (i.e. β. If <β × β1) then #2
Proceed to 39. In #239, the microcomputer MCB is the camera lens.
The focal length f of the point M and the predetermined focal point,
,,for example, 50vn), and if r>r, then
Proceed to #240, perform l”B vs operation ■], and
Find the brightness Bvs of the subject. As described later, “Bv
s calculation■, the microcomputer MCB calculates the three photometric data.
Find the brightness Bvs of the main subject from B Vo '-B V2.
Therefore, the background brightness Bva is the photometric data Bv3-
It is obtained from Bv5 (#241). In #238, β≦β. or #2
If f≦f in 39, the microcomputer MCB is #
Proceed to 242. In #242, the microcomputer MCB
Calculate the brightness of the main subject from the photometric data Bv+1-Bv5.
Similarly, calculate all the photometric data Bvo-Bvs.
The brightness Bva of the scene is determined (#243). That is, #2
4.2. In #243, so-called average photometry is performed. In addition, "Bvs calculation I", "Bvs calculation ■", "Bvs calculation
In "Operation ■", the microcomputer MCB performs each
Predetermined weights (Tables 7 to 9) are applied to the photometric data BVo-Bv4.
(see table) and performs a weighted average.
I am looking for the brightness of the body Bvs, but the brightness of the background B va,
The brightness Bvs of the main subject found in #242 is calculated using the arithmetic
I'm looking for an average. That is, in #233, B va = B V5, and in #237, B va = (B v3 + B vt + B vs) / 3
, in well 242, Bvs = (Bvo + Bv, +Bv2 + B V3 + B v, 10B vs) / 6, #24
3, by the calculation Bva=(Bvo+Bv1+Bv2 10B V3+B v4+ B vs)/6.
So, the microcomputer MCB controls the brightness of the main subject B vs. the background.
The brightness Bva of . Table 6 shows the photographing magnification β, focal point y1 distance f of the photographic lens, and
Let us summarize the correspondence with the calculation method of subject brightness Bvs.
. In addition, in the same table, “Bvs operation ■” is the same as in #242.
It shows the calculation. Find the brightness Bvs of the main subject and the brightness Bva of the background
Then, the microcomputer MCB proceeds to #251 and sets both brightness B v
s, B va, shutter speed Tv, fringe value AV
, the exposure control value such as the flash light emission amount Iv is calculated by a predetermined calculation.
Ask according to the following. First, the microcomputer MCB switches to the AE lock switch ALS.
Determine whether the AE lock is set (#
251). If 7-lag BLAF is set, my
The controller MCB has an AE lock using the AE lock switch ALS.
The subroutine “Slow Synchronization” determines that the
Proceed to Kuro J ($252). 7 lag BLAF reset
, the microcomputer MCB will set the AE lock switch A.
Determined that AE lock by LS is not done, #2
Proceed to 53. In #253, the microcomputer MCB has an exposure control
It is determined whether the control mode is P mode. Exposure system
If the content of the control mode recorder MOR is “00”, the master
The icon MCB determines that the exposure control mode is P mode.
Turn off and proceed to #254, otherwise go to exposure control mode
It is determined that the mode is not P mode, and the process proceeds to #257. #254
So, is the flash firing mode automatic firing mode?
determine whether That is, the light emission mode register FM
If the content of R is “01”, the microcomputer MCB flashes.
The camera determines that the flash device is set to automatic flash mode.
Proceed to subroutine [Automatic flash J (#255),
If not, proceed to the subroutine "Natural Light"(#256). If you proceed to #257, the flash mode will change to forced mode.
Determine whether the code is That is, the luminous mode
If the contents of register FMR is “00”, microcontroller M
For CB, the flash device is set to forced flash mode.
Then, go to the subroutine “Forced flash J (#258)”.
If not, go to subroutine [Natural Light j (#25
Proceed to 6). Each subroutine "slow synchronization", "natural light" automatic
In light emission, forced light emission, and spot metering, Maiko
The MCB calculates the exposure control value according to each calculation method.
Calculate and return to the AE routine (#27 in Figure 5). Furthermore, as is clear from the following, the microcomputer MCB is
AE lock switch A L S with AE lock switch
sub-routine only when the flash is on and the flash is on
``Slow synchronization''・\Go forward. Also, the microcomputer MCB
is the subroutine when the exposure control mode is P mode.
Go to either "Auto flash" or "Natural light" and select other exposures.
When in control mode, the subroutines “Natural Light” and “High
Proceed to one of the "control lights" options. “B vs operation” Figure 14 is a flowchart showing the subroutine “B vs operation I”.
It is a low chart. In this routine, the microcomputer MC
B is five photometric data B Vo "" B V4,
Based on the weighted average shown in Table 7, the main subject
The brightness BvS of is calculated. When proceeding to this routine, the microcomputer MCB first
- Which zone is the main zone among the second focus detection zones?
Determine if it is. In other words, the microcontrollers MC and B are
, selected in focus detection routine (Fig. 10) #141.
Determine which zone the zone is (#261.$
262). In #261, the Oth zone is the main zone.
If the microcomputer MCB determines that there is, it proceeds to #263 and #
In 262, if the first zone is the main zone, the microcomputer
If the MCB makes a decision, proceed to #264. And the 01th
None of the zones in 1 is the main zone, i.e.
The microcomputer MCB determines that the main zone is within the 2//- zone.
Then, proceed to #265. As mentioned earlier, the photographing magnification β is set to the predetermined magnification β2 (book 83).
In one embodiment, if the buffer is larger than 1/40)
(shot shot) only, microcomputer MCB is jB vs performance jE
Since we will be processing IJ, we will process this routine.
Sometimes the light from the main subject falls within the metering range LMR (second
(see figure) is predicted to be incident on most of the areas. However,
Therefore, in this case, the microcomputer MCB is located near the main zone.
Increase the weight of the photometric value in the neighboring photometric area, and
Weighted average by decreasing the weight of the photometric values in the photometric area of
is calculated, and it is taken as the brightness Bvs of the main subject (just
Then, the photometric value By5 of the outermost frame determines the background brightness Bva.
). Specifically, as shown in Table 7, the main subject is
When located at the center of the shadow screen FLM (Zone 0),
Nawachi! #When the O zone is the main zone, the microcomputer
MCB is one of the photometric areas L M and H shown in FIG.
Photometric value B Vo+ B vlH in area 1.2.3
Weight of B V2 is 2, photometric value B in other areas 4 and 5
By the weighted average with the weight of v3+B V, set to 1,
, the brightness Bvs of the main subject is determined (#263). vinegar
In other words, on the other hand, the main subject is slightly to the left of the center of the shooting screen FLM.
, (first zone), i.e., when located in the first zone
When the zone is the main zone, the microcomputer MCB
, 2, the weight of the photometric value BVo+Bv1 is set to 2, and the weight of the photometric value BVo+Bv1 in
Photometric value Bv2°Bv3 in areas 3 and 4.5. Bv, of
The brightness Bvs of the main subject is determined by a weighted average with a weight of 1.
(#264) In other words, the main subject is slightly to the right of the center of the shooting screen FLM (the second
zone), that is, the second zone is the main zone.
The same is true when it is a turn (#265). In other words, if we calculate the brightness Bvs of the main subject using this method, the microcomputer
MCB is the subroutine "exposure calculation" (Figure 13 $233
) Return to Figure 15 is a diagram showing the subroutine “B vs operation ■”.
It is a low chart. In this routine, microcontroller M
C and B are three photometric data B v o + B v
+ Weighted average of HB v 2 with the weights shown in Table 8
The brightness Bvs of the main subject is determined by the equation. When proceeding to this routine, the microcomputer MCB first
Similarly to "routine j B vs operation 1", the 0th to 2nd
Determine which zone is the primary zone
(#271, #272). In #271, the 0th zo
When the microcomputer MCB determines that the zone is the main zone, #
Proceed to 275, and in #272, the first zone is the main zone
If the microcomputer MCB determines that this is the case, the process advances to #273. And none of the zones in No. 1 and No. 1 are main zones.
In other words, if the second zone is the main zone, the microcomputer
If the MCB makes a decision, proceed to #274. wJ1 zone or 2nd zone is the main zone.
If the icon MCB determines that the
(see focus detection routine (Figure 10) #142)
($27j, $274). and,
The microcomputer MCB determines that the 0th zone is a proximity zone.
Then, proceed to #277 and #278, and the 0th zone is the adjacent zone.
The microcomputer MCB determines that it is not a tone.
3. [Go to 79. As mentioned earlier, the photographing magnification β is set to the predetermined magnification β1 (this implementation
In the example, β for 1/60Lβ2, <β≦β2 (
(for example, a vertical full-body photograph) and the focal length of the photographic lens.
The distance f is from a predetermined value fI (28 mm in this example).
Only if it is long, the microcomputer MCB is l'B vs performance KII.
Process J. In this way, the imaging magnification β is “B v
It is smaller than the sword that performs the processing of s operation I, and my
:l N M CB is smaller than "B vs performance! H"
Same as "Bvs calculation I" using the photometric value of the small area.
, in the metering area near the main zone where the main subject is located.
Find the weighted average by increasing the weight of the photometric values that are
The brightness of the main subject is Bvs. Specifically, as shown in Table 8, one subject
When located in the center of the shadow screen FLM (Zone O),
In other words, when zone O is the main zone, myco
The MCB is located in area 1 of the photometric area shown in Figure 2.
The weight of photometric value Bvo in area 2 and area 3 is set to 2.
Weighted average of light values BV + and B v 2 with weight 1
The brightness Bvs of the main subject is determined by (#27.
5). That is, on the other hand, the main subject is the shooting screen F, LM
If it is located slightly to the left of the center (first zone),
That is, if the first zone is the main zone, the Oth zone
If the area is in the proximity zone, the microcomputer MCB
The weight of the photometric value B VO, B v at 2 is set to 2,
Weighted average of the photometric value Bv2 in area 3 with a weight of 1
Find the brightness Bvs of the main subject by (#277
). In other words, if the second zone is not a proximity zone, the microcomputer
MC"B is the photometric value Bv in area 2, with a weight of 2 and a weight of 1 for the photometric value Bvo in area 1.
The brightness Bvs of the main subject is determined by the weighted average.
($276). In other words, in this case, the microcomputer MCB performs the measurement in area 3.
When calculating the light value Bv, the brightness Bvs of the main subject is
Not used. This is when the main subject is on E/'-n.
, if the 0th zone is not the adjacent zone, that is, the 0th zone
If the subject in the zone is close to the main subject (main subject
If the subject is not the same as the subject), place the 0th /-on in between.
In the second zone, which is on the opposite side of the first zone, there is no longer a
This is because there cannot be a subject that is the same as the main subject. Also, if the subject in the second zone is the same as the main subject,
Even if it is not the main subject, as long as it is somewhat close to the main subject.
, the brightness of this subject greatly contributes to the photometric value Bv2.
As mentioned earlier, the microcomputer MCB uses this photometric value B.
v2 is also not used when determining the background brightness Bva. The main subject is slightly to the right of the center of the shooting screen FLM (second
・/−n), that is, the second zone is the main
The same applies if the zone is a zone, and the 0th zone is a neighboring zone.
If the microcomputer MCB determines that the
The microcomputer MCB calculates the brightness Bvs of the main subject by
($278), zone 0 must be in the adjacent zone.
If the icon MCB judges (I274), the microcomputer MC
B calculates the brightness Bvs of the main subject by (#27
9). In this way, when calculating the brightness Bvs of the main subject, the microcomputer
MCB is the subroutine "exposure calculation"(#237 in Figure 13).
) Return to Figure 16 is a diagram showing the subroutine “B vs operation ■”.
It is a low chart. In this routine, the microcomputer MC
B is three photometric data B VOIBVlllBV2,
Based on the weighted average shown in Table 9, the main subject
We are looking for the brightness Bvs. Proceeding to this routine, the subroutine “B vs operation■
", same as "Bvs operation ■", of the O-2nd zone
Determine which zone is the main zone (#281.
#282). In #281, the 0th zone is the main zone
If the microcomputer MCB determines that there is, it proceeds to #283 and #
282, the microcomputer determines that the first zone is the main zone.
If the MCB makes a decision, proceed to well 286. And the 0th.
None of the first zones is the primary zone, i.e.
The microcomputer MCB determines that zone 2 is the main zone.
and proceed to #288. The microcomputer MCB determines that the Oth zone is the main zone.
If you proceed to #283, check if the first zone is a proximity zone.
determine whether Next, the microcomputer MCB
・Determine whether /- is in the proximity zone (#2
84. I285). Then, the microcomputer MCB operates the first.
2. If it is determined that neither zone is a proximate zone, the well
Proceed to 290, if the first zone is not a proximate zone, and
, if the second zone is determined to be a proximal zone, #291
Proceed to. Also, 1st. 2nd both zones are proximity zones
If it is determined that
zone, and the second zone is not a proximate zone.
If so, proceed to #293. The microcomputer MCB determines that the first zone is the main zone.
If you proceed to #286, check whether the 0th zone is a proximity zone.
determine whether In #286, the 0th zone is near
When the microcomputer MCB determines that it is in the contact zone, I287
Proceed to and determine whether the second zone is a proximal zone.
do. Then, the microcomputer MCB determines that the second zone is the proximity zone.
If it is determined that the zone is not in
If it is determined that it is in the proximity zone, the process proceeds to #294. - way,
In #286, the 0th zone is not a neighboring zone.
If the icon MCB makes a decision, proceed to #295. The microcomputer MCB determines that the second zone is the main zone.
If the first zone is the main zone, the first
0. If the first zone is a proximity zone, proceed to #297.
, the 0th f-c is the proximity zone, and the 1st zone
If it is not a proximal zone, proceed to #288, and the Oth zone is
If it is not a proximity zone, proceed to #296. By the way, as mentioned earlier, the imaging magnification β is the predetermined magnification β
. (1./100 in this example), β with respect to β1. Ku
β≦β1 (for example, a horizontal full-body photograph), and
The focal length f of the photographing lens is a predetermined value f. (501 in this embodiment) only when the microcomputer M
CB performs "BvS operation ■" processing. in this way,
Shooting magnification β is from when processing "BvS calculation■"
Since the microcontroller MCB is also small, the microcontroller MCB is
Only the photometric values in the photometric region where the contact zone contributes are used.
The brightness Bvs of the main subject is determined by performing arithmetic averaging.
Ru. Specifically, as shown in Table 9, the proximity zone
If there is no one, the microcontroller MCB will
The photometric areas (O9 1st and 2nd zones are respectively
Photometry corresponding to photometry areas 1, 2.3 (see Figure 2)
Let the value be the brightness Bvs of the main subject. And for example,
The 0th zone is the main zone, and the 2nd zone is nearby.
If the zones are close to each other, the microcomputer MCB
The photometric value B vo in the photometric areas 1 and 3 that contributes the most
, Bv2, the brightness of the main subject Bvs
I'm looking for. In other words, as well as outside of "Bvs operation ■", the first (2) zone
The 0th zone is the main zone, and the 0th zone is the close zone.
If it is not in the second (1) zone, the microcomputer MCB
The photometric value Bv2 (BV,) of the photometric area where the
, the brightness Bvs of the main subject and the brightness Bva of the background.
It is also not used when asking for something. In this way, when calculating the brightness Bvs of the main subject, the microcomputer
The MCB executes the subroutine “exposure calculation” (#24 in Fig. 13).
Return to step 1) and perform the process. ``Determination of exposure control value'' Figure 17 shows the subroutine U-Synchronization (Figure 13).
252). When entering this subroutine, the microcomputer MCB first
Main capacitor MC in flash circuit FL, C
The charging voltage has reached the specified voltage (300V) or higher.
(#301). 6th bin of data FCR, FC, R, 5 is reset
If so, the microcomputer MCB will connect the main capacitor M
It is determined that the charging voltage of C has not reached the specified voltage.
Proceed to #302, otherwise proceed to #305. #3
When you proceed to 02, the microcomputer MCB will display that it is charging.
In order to indicate this, "11" is stored in the display data FLD2.
. In order to prohibit flash emission in SO L, microcontroller M
CB c, 64th vertical bin of data CFR3), CFR
Set 3s (#303), flash circuit Fl-
In order to display on the display CHD in C, the data
Reset the 7th bit of CFR3, CFR,6.
(#304), proceed to the spot metering routine (Fig. 21).
nothing. In #301, the charging voltage of main capacitor MC is
If it is determined that the specified voltage has been reached and the process proceeds to #305,
In this case, the microcontrollers MC and B are used to calculate exposure control values.
The background brightness Bva is used as the control brightness value Bvc. Na
In slow synchro photography, 11 scenes are properly exposed.
Determine the exposure control value so that the
, adjust the flash so that the appropriate exposure value is achieved using the flash light.
This is because the flash light emission is controlled. continue,
The microcomputer MCB should determine the exposure control mode #306,
#313), exposure control mode is S mode or M mode
If so, go to #307, if it is A mode, go to #314
Then, if you are in P mode, proceed to #316. In #307, the set shutter speed Tvs is
Flash synchronization limit shutter speed Tvx (e.g.
Determine whether it is faster than 1/100sec, )
do. And the set shutter speed Tvs is 7
If it is faster than the shutter speed Tv x the shutter synchronization limit
When the microcomputer MCB judges, control = 96- control shutter speed Tv to 7 latches synchronization limit shutter
Please set the speed Tvx ($ 30.8), that's right.
If the control shutter speed Tv is set to the shank
Set the speed Tvs (#309). And exposure
Determine whether the control mode is S mode or M mode
However, in M mode, the microcontroller M and CB control the aperture.
Please set the value Av to the set aperture value Avs #311)
, if in S mode, perform S mode calculation, Av = Bvc + Sv Tv to find control aperture value Av (#3121° exposure
If the control mode is A mode, the microcomputer MCB
Set the aperture value Av to the set aperture value AvS $3
14), A mode calculation T v = B vc + S v - A
, v to obtain the control shutter speed Tv (#31
5). Also, if the exposure control mode is P mode, the microcomputer M
CB is a controlled shutter based on a predetermined block diagram line.
Find the speed Tv and control aperture value Av ($316). Then, the microcomputer MCB controls the control shutter speed
DeTv and 7 lash synchronization limit Shutter speed Tvx
Compare #3'17), control shutter speed Tv
If it's faster, you won't be able to synchronize the flash, so
The control shutter speed is tuned to 7 latches.
Reset the limit shaft speed to TVX ($318)
, proceed to $312 and reset the control aperture value Av. Then, the control shutter speed Tv, the control aperture value Av
When calculating, ÷ icon MCB is α calculation routine (first
8) is performed. Note that in this embodiment, the memory in the flash circuit FLC is
If the charging of the in-capacitor 1MC is not completed, the
Prohibit flash lighting and use sports that do not involve flash lighting.
I have switched to metering shooting (#30'1 to #3
04), omit steps #301 to #304.
, regardless of the state of charge of the main capacitor MO.
It is also possible to have one flash of light emitted after seven flashes (later).
(mentioned). FIG. 18 is a 70-chart showing the α calculation routine.
Ru. When entering this routine, the microcomputer MCB first
control, control brightness value Bvc (i.e. background brightness Bva) and main
Difference △Ev from subject brightness Bvs, that is, flash
The amount of light exposure that must be compensated by light emission
' △Ev=Bvc-Bvs=Av+Tv 5v-Bvs
Find ($321). Next, the microcomputer MCB is
Based on this value △Ev and photographing magnification β, the flash
The light is emitted only by the amount that will give the correct exposure using only 7 flashes of light.
amount of overexposure when
(or simply called the correction amount) is determined. Microcomputer MCB
First, check whether the brightness difference △Ev is larger than 1 or not.
'll separate ($322). Then, the brightness difference △Ev is 1
Exposure that should be compensated for by flash emission
If the amount is large, the microcomputer MCB changes the correction amount a to the brightness difference △
Calculate from Ev and imaging magnification β ($323). on the other hand,
When the luminance difference △Ev is 1 or less and flash emission
If the amount of exposure to be compensated is small, the microcomputer MCB will
Calculate the positive amount α only from the shooting magnification β = 99- ($ 3'2"4'). The brightness difference △Ev is the brightness between the main subject and the sub-subject (background).
The difference is that the microcomputer M'CB reduces the amount of light emitted,
The correction amount is adjusted to emit light by the amount corresponding to this difference △Ev.
α is calculated and the amount of light emitted is reduced by this correction amount α.
Ru. The reason for this is as follows. Shooting magnification β, that is, the size of the main subject relative to the screen
The light reflected by the main subject changes depending on the
If you do not correct the amount, the main subject may not look right.
be. For example, if the shooting magnification β is small,
Since there is little reflected light, if you do not reduce the amount of light emitted,
The main subject will be overexposed. Something like this
In order to prevent
The quantity correction amount α is calculated. Specifically, if the i-sho magnification β is small
In order to stop emitting light even if the amount of reflected light is very small,
The correction amount α is set to a large value. Note that in the camera system of this example, various conditions are met.
The correction amount α for the case can be calculated in advance from actual photographs and theoretical analysis.
and store it in RO'M in the microcontroller MCB.
The data is read from the ROM when necessary. Next, the microcomputer MCB outputs the dimming signal FSTP.
Please check the data FC ($E325)
5th bit FCRo'4 of R'' is set.
If so, the microcomputer MCB outputs the dimming signal FSTP.
In order to judge that and display that on the display circuit DSP,
Store "10" in display data F'LD (well 326
). On the other hand, data FCRo's 5th place Pi)'FCRo
4 has been reset, the microcontroller M CB will send the dimming signal.
It is determined that the number FS"T'P is not output, and the main control
The display circuit DSP indicates that charging of the capacitor MC is completed.
(In this example, when proceeding to this routine,
, the main capacitor MC is always fully charged.
), “01” is stored in the display data FLD (
$327). Next, the microcomputer MCB has a flash camera system.
Make the display circuit DSP display that it is in the flash mode.
Therefore, “01” is stored in the display data FLD2 ($
3j8). Then, the microcomputer MCB
The 6th bit C of the light emitting data CFR
Please reset FR35 #329), flash circuit F
Allows display circuit FDP and display CHD in LC to operate.
7th position pi of data CFR3) C-F
, reset R36 (#330). Then the data
Proceed to the set routine (Figure 19). Figure 19 is a flowchart showing the data set routine.
It is. In this routine, the microcomputer MCB
The text to be output to the flash circuit FLC and display circuit DSP
゛-Set the evening. However, until you proceed to this routine
Except for data set in (for example, FLD, etc.)
. First, send it from the microcomputer MCB to the flash circuit FLC.
Set data CFR, ~CFR3 (see Table 5)
. That is, the microcomputer MC,B inputs data CFR,
Camera system exposure control mode and film sensitivity S
Please set v#, 331) and record the shooting record in the data CFR.
The focal length Fv of the lens is set (, #332). stop
Then, set the control aperture value Av in the data CFR2 $3
33), Data CI'R. (Lower 5 focus) Set the light emission correction amount α (I 33
4). Next, the microcomputer MCB sends a control shutter to the display data TVD.
Set data speed Tv (336), display data A
Set the control aperture value Av in VD (337), display data
Set the film sensitivity Sv in the data SVD (I338
) 6 And the microcomputer MqB is in the AE block?
AE lock is applied to the display data ALD to display whether or not the
Set the contents of flag ALF ($32!9). When the setting of the data is completed, the "rAE routine" (No.
Return to Figure 5 #26). Figure 20 shows the 70-chip subroutine "forced flash".
It is a chart. Proceeding to this routine, the subroutine “
Similar to "slow synchronization", the microcomputer MCB has a flash
Charging of the main capacitor Me in the circuit FLC is completed.
(#3.41). And the mail
If the charging of the in-capacitor MC is not completed, the
The controller MCB shows the display circuits DS and P that charging is in progress.
To display, store "11" in display data FLD2.
(#342). Then, the microcomputer MCB
6th place in data CFR3 to prohibit flash flash emission.
Bit CF R) S should be set #343), and
Indication by indicator CHD in flash circuit FLC (charging
data to display a message indicating that the line is busy.
Reset the 7th bit CFRs6 of CFR, (#
344). After that, the microcomputer MCB runs the natural light routine (
The process shown in FIG. 22) is performed. At #341, charging of main capacitor MC is completed
If the microcomputer MCB determines that the
Process. The microcomputer MCB first controls the control brightness value.
Adopt background brightness Bva as Bvc (#345)
. Next, the microcomputer MCB controls the exposure of the camera system.
Distinguish control mode, #346, $347), exposure control
If the control mode is M mode, proceed to #348 and proceed to A mode.
If so, proceed to #353, if in S mode, proceed to #356.
move on. As mentioned earlier, in P mode, this support is
It's impossible to get into the blues. On the exposure side, when the control mode is M mode, the microcomputer MC
B is the set shutter speed Tvs and tuning limit series.
The shutter speed Tvx is compared (#348). stop
Therefore, the set shutter speed Tvs is higher than the sync limit.
If the shutter speed is slower than Tvx (i.e., the shutter speed
If rush synchronization is possible), the microcomputer MCB controls
Shutter speed T that is set to shutter speed Tv
vs. #351), if not, the microcomputer
MCB is the tuning limit shunt of the control shutter speed Tv.
and set the speed Tvx (#352). And then
Even in the case of deviation, the microcomputer MCB adjusts the control aperture value AV.
Set to the set aperture value (#3'55). When the exposure control mode is A mode, the microcomputer MCB
is the control shutter speed Tv to the tuning limit shutter speed
#354), and set the control aperture value Av.
The aperture value is set to the specified aperture value Avs (#355). Also, if the exposure control mode is S mode, the microcontroller
The MCB proceeds to the subroutine "flash operation, arithmetic".
Calculate control shutter speed Tv and control aperture value Av
($356). When the exposure control values TV and Av are calculated, the microcomputer MC
B proceeds to the a calculation routine (Fig. 18) and performs the above-mentioned
AE routine (Figure 5 #
Return to 26). Note that in this embodiment, the memory in the flash circuit FLC is
If the charging of the in-capacitor MC is not completed, the flash
Prohibit flash light emission and use natural light without flash light emission
Although it is switched to shooting (see #341 to #344),
Similar to slow synchronization (Fig. 17), #341 to #34
Skip step 4 and charge the main capacitor MC
The flash always fires regardless of the condition.
You can do it like this. Figure 21 is a flowchart showing the subroutine “Flash operation”.
It is a low chart. When proceeding to this subroutine, the microcomputer M CB 1. t
, first, tune the shutter speed to the limit shutter speed
Calculate the fringe value Av assuming that it is set to Tvx (
$361). That is, Av=Bvc+5v-Tvx. Next, the microcomputer MCB has a threshold value of $361.
Av and maximum aperture value (value for minimum aperture) Avon
Compare with $362), the aperture value Av is the maximum aperture value Av
If it is larger than on, that is, the aperture is smaller than the minimum aperture.
When it comes to the diameter of the aperture, the control aperture value Av is changed to the maximum aperture value Avm.
($363). Note that the microcomputer MCB is
input the maximum aperture value Avon from the lens circuit LEC.
Ru. The aperture value Av calculated at $361 is less than the maximum aperture value Avon
, the microcomputer MCB determines the aperture value Av and the aperture value Av.
The aperture value Avo is compared (I 364). This open aperture value Avo is also determined by the microcomputer MCB.
Input from route LEC. And the aperture value Av is the open aperture
If it is greater than or equal to the value Avo, that is, the aperture calculated at $361
If the value Av is within the aperture interlocking range (A vO≦Av≦
Avon), the microcomputer MCB controls the aperture value Av.
It is adopted as the aperture value Av. On the other hand, at $364, the aperture value Av found at $361
is smaller than the open aperture value Avo, the microcomputer MC
For B, set the control aperture value to AVO ($365) and
Calculate the data speed Tv ($366). That is, Tv=Bvs+5v-Av, 0 And the microcomputer MCB is the shutter obtained at $366.
Compare speed Tv and predetermined shutter speed Tvl+
Compare ($367). This predetermined shutter speed Tv
h is the maximum shutter speed that does not cause camera shake.
Yes, the longer the focal length f of the photographic lens, the faster the value (
For example, if f=50+am, Tvl+=6 (1/6
0sec)). Furthermore, this shutter speed Tv
The value of h is set in the ROM in the microcontroller MCB.
The data is read from the ROM when necessary. $36
7, shutter speed T calculated at $366
If v is slower than the predetermined value Tvt+, the microcomputer MCB
is the control shutter speed Tv, which is the camera shake limit value T
vl+ ($368) and return to the original routine. So
Otherwise, the microcomputer MCB calculated at $366.
Set the value Tv to the control shutter speed Tv and return to the original rule.
Return to Chin. -・The aperture value calculated at $361 is the maximum aperture value Av+
If it is larger than n or within the aperture interlocking range
(That is, Av≧Av,), the microcomputer MCB controls
Shutter speed TV tuning limit shank speed Tv
Set it to x ($1369) and return to the original routine. As mentioned above, in the flash operation routine,
Ikon MCB sets the shutter speed Tv to the tuning limit.
Find the fringe value Av assuming the link speed Tvx, and
If the value Av is smaller than the open aperture value Av, ), the aperture value A
Set v to the open aperture value Avo and set the shutter speed Tv.
I'm looking for. Then, set the aperture value Av to the open aperture value Avo
The shank speed Tv determined by setting
If the shank speed is such that there is a risk of this occurring (Tv<T
vh), the microcomputer MCB controls the shutter speed Tv.
To the limit shutter speed Tvh that does not cause camera shake
Settings are being reset. This makes slow synchronization possible.
When accompanied by 7 flashes outdoors (as described later, the automatic flash
mode, the microcomputer MCB also processes this routine.
), there is no risk of camera shake. Figure 22 shows the subroutines “Natural Light” and “Spot
70-chart showing "photometry". When entering the subroutine "Natural Light", the microcomputer MCB
Set the control brightness value Bvc to the brightness Bvs of the main subject.
#371) The subroutine and spot metering were entered.
In this case, set the control brightness value Bvc to the area in the center of the shooting screen.
The photometric value Bvo in region 1 is set. And which
Even in this case, proceed to steps after #373. The microcomputer MCB first controls the exposure control module of the camera system.
(#373 to $375). “00” is stored in the exposure control mode register MOR.
If so, the exposure control mode of the microcomputer MCB is P mode.
#3'73), and the specified program
control aperture value Av, control shutter speed Tv based on
Calculate ($376). “01” is stored in the exposure control mode register MOR.
If so, the exposure control mode of the microcomputer MOB is S mode.
Therefore, S mode calculation 1ii- Av”Bvc+Sv Tvs is performed to calculate the control aperture value Av, and the control system is
Shutter speed Tv set to shutter speed Tv
Set to s ($'377). “10” is stored in the exposure control mode Y Renostar MOR.
If so, the exposure control mode of the microcomputer MCB is A mode.
($375), and calculate the control shutter speed Tv by performing the A-mode calculation Tv=Bvc+5v-Avs.
, set the control aperture value Av to the set aperture value AvS.
(#378). The exposure control mode is P, S, or A.
If it determines that it is not in mode mode, that is, it is in M mode,
The icon MCB is the control aperture value Av, the control shutter speed
d Tv, the set aperture value A vs. the set aperture value, respectively.
($379). As mentioned earlier, in this example, flash emission
"Slow synchronization" or "forced flash" routine with
In this case, the main condenser in the flash circuit FLC
If charging of the microcontroller MC is not completed, the microcontroller MCB
interrupts the processing of those routines and fires a flash.
"Spot metering" or "natural light" processing without
Do this. Therefore, the microcomputer MCB controls the control aperture value Av and the control shutter value.
When you finish setting the data speed Tv, the subroutine “Set
From "low synchro" to "spot metering" or
Proceed from routine “Forced light” to “Natural light” routine
(#380). Subroutine “slow synchronization” or “forced flash”
If you proceed to this routine from
“11” is stored in the data F L and D2 (the
Figure 17 #302, Figure 20 $342), so microcontroller M
CB is based on the data stored in display data FLD2.
to determine that. Subroutine “Slow Sync”
If you proceed to this routine from "B" or "1 Forced Flash"
If so, the microcomputer MCB skips to #382.
Ru. If that's not the case (if it dries up, that is, the photographer will take 7 years)
Set to exposure control mode that does not involve flashing, and use the subroutine.
#254 in "Exposure calculation" (Figure 13). #25
1 to #266, or #228 to #
If you proceed to 2.59, the microcontroller M CB
, to make the display circuit DSP erase the display of the 7-lash information.
Therefore, "Oo" should be stored in the display data FLD2 #381
), proceed to #382. At #382, a dimming signal is output from the flash circuit FtC.
Determine whether power is being applied. Data FORO (7
) If the fifth bit FC'R,, is set, the master
The icon MCB determines that the dimming signal is being output and displays the
In order to display this on the display circuit DSP, the display data
"1o" is stored in FLD (#383). That's right
If so, erase the display of the 7-lash information on the display circuit DSP'.
Microcomputer M CB let, display data FL
Store "oo" in D1 ($384). Continuing,
To set the flash device to non-emission mode,
TaCFR. Please set the 6th bit CFR35 of #385).
Display circuit FDP and display CHD in rush circuit FLC
To enable the data CFR. (#38)
6). After that, the “Dataset” routine described earlier (the
Proceed to Figure 19) and return to the AE routine (#26 in Figure 5)
. Figure 23 is a flowchart showing the subroutine “automatic light emission”.
It is a chart. This subroutine can be roughly divided into four parts.
It is divided into parts. One is to determine the amount of exposure using natural light.
section (#401 to #410 and $4.29.#
430), other - is supplemented to make the main subject appropriate
7. Part that calculates the amount of light emission (#411 to @415)
, and another one determines whether or not to emit 7 lashes.
(#416 to #425), and the last part is the data
Data setting part (#426~#428.$431~#44
0, and the data set routine (Figure 19)).
. Below, we will explain each subroutine shooting condition.
. Note that the shooting conditions referred to here are high-brightness front lighting (hereinafter referred to as
, simply referred to as front lighting), high-intensity backlighting (hereinafter simply referred to as backlighting)
), low-brightness frontlighting, and low-brightness backlighting, depending on each shooting condition.
The light beam conditions used are as shown in FIG. Sunawa
Bvs≧Bvb Gatsu Bva<Bvs
+2 Reverse Light Bvs≧Bvh Gatsu Bva≧
Bvs+2 Low brightness front light Bvs<Bvl+ga Bva<
Bvl++1 Low brightness backlight Bvs<Bvbg Bv
a≧Bvh+1. First, the case of front lighting will be explained. In case of direct sunlight,
Based on the brightness Bvs of the main subject, the exposure control value A v,
Determine T v and take a picture without using a flash.
be called. First, the microcomputer MCB has the brightness Bvh at the camera shake limit.
Find ($401). The brightness Bvh at the camera shake limit is
, set the shutter speed to the camera shake limit value Tvb, and adjust the aperture.
The brightness that becomes appropriate when the aperture value is set to the maximum aperture value Avo.
B vl+= T vh+ A VQ-8v. In addition, if the open aperture value Avo is smaller than 3Ev (F2.8)
In the case, do not use the open aperture value Avo and set Bvh=Tvl
++3-3v may be used. Next, the microcomputer MCB determines the brightness Bvs of the main subject.
It is determined whether the camera is within the camera shake area (#402). now
, it is clear from Fig. 35 that the case of front lighting is assumed.
As shown, the brightness BνS of the main subject is within the camera shake area.
It's not in there. Therefore, the microcomputer M CB costs $4
Proceed to 03 and reset the low brightness 7 lag LLF. The microcomputer MCB then calculates the brightness Bvs of the main subject and
Find the difference ΔBv=Bva−Bvs with the brightness of the scene Bva (
$404), and determine whether it is backlit or not based on the difference ΔBv.
Judgment ($405). We are now assuming the case of direct sunlight.
Therefore, the microcomputer M CB advances from $405 to $426.
The display circuit DSP displays the non-emission mode.
Therefore, "10" is stored in the display data FLD2. Then, the microcomputer MCB sets the control brightness value Bvc to
Set the brightness of the subject Bvs ($429), and use the specified program.
Control aperture value Av and control shutter speed based on the ram line.
Calculate the code TV ($430). After that, the microcontroller MC, B is the flash circuit FLC.
Determine whether the dimming signal FSTP is being output.
($431), if the dimming signal FS'TP is output.
, the microcomputer MCB displays this on the display circuit DSF'.
“10” is stored in the display data FLD1 to display the
, Ru ($432). Also, the dimming signal must not be output.
If so, the microcomputer MCB will turn off the dimming OK display.
, stores “00” in display data FLD1 ($433
). And the microcomputer MCB prohibits flash emission.
6th bit CFR3S of data CFR3
Sera) L ($434), table in flash circuit FLC
To allow operation of indicator FDP and indicator CHD
, reset the 7th place hit CF R36 of data CFR3.
($435). Then, the microcomputer MCB
Proceed to the data set routine (Figure 19) and proceed to the AE routine.
Return to (#26 in Figure 5). Next, the case of backlight will be explained. In case of backlight,
Set the subject appropriately and make the background more interesting than the main subject.
Overexposure by Ev, thereby reducing the backlight condition.
Adjust the exposure so that the trust is maintained and the backlight effect appears in the photo.
An output control value is determined. As in the case of front light, progress from $401 to $405, and then
At 405, the microcomputer MCB determines that there is backlight.
Proceed to $406. Then, the control brightness value Bvc is set to the background brightness.
Set the value to be less than Bva by IEv.
. From this control brightness value Bvc, the control aperture value Av and the control shutter
The background is the main subject.
Only IEv is overexposed. Then, as in the “a operation routine” (Figure 17), the control
The difference between the control brightness value Bvc and the brightness of the main subject, that is, the main
In order to properly capture the subject, use a flash to compensate.
Find the amount of light that should be ΔEv=B vc −B vs
(I 411). Then, the photographing magnification β and the light amount ΔEv are
Based on this, the light emission amount correction amount α is determined. As mentioned earlier, this correction amount α is
Reflected light from the main subject changes depending on the subject ratio β
Considering the amount of light, it is the shortfall ΔEv from the appropriate amount of natural light.
This is the correction amount for emitting light. And this correction amount
α is based on data collected from live shooting under various conditions.
Then, the relationship between the correction amount α, photographing magnification β, and insufficient light amount ΔEv is expressed as follows:
Calculate the correction amount α from the shooting magnification β and insufficient light amount ΔEv.
Alternatively, the photographing magnification β and insufficient light amount may be
Even if you prepare a ROM table for the correction amount a based on △Ev,
good. When the correction amount α is calculated, the microcomputer MCB considers the correction amount α.
Taking into consideration, perform FM calculation Avd=Iv-α+5v-Dv to find the maximum aperture value Avcl that allows dimming ($
416). Note that Iv here is the maximum output of the flash device.
The amount of light, Dv, is the shooting distance. Then, the current correction amount α
Then, determine whether the main subject is appropriate (#4.
17. ). The aperture value Avd found at $416 is the open aperture value.
If it is smaller than Avo, 7 rays of light will reach the main subject.
Even when the aperture is wide open, the amount of light emitted is insufficient, and the main
The subject is not properly photographed. Also, the fringe value Avd is
If the value is greater than or equal to Avo, the aperture becomes Avo≦Av≦Avd.
With the value Av, the main subject becomes appropriate.・The result of the judgment at $417 is that the main subject is correct.
If the microcomputer MCB determines that there is not, the process advances to $418.
Determine whether or not the force/measuring range is within the range. sand
In other words, if the low brightness flag LLF is set, the
Con MCB judges that it is in the camera shake area and #
Proceed to 419 and if the 7 lag LLF has been reset #
Proceed to 426. I'm thinking about the case of backlighting, so the flag LLF
has been reset. Therefore, the main subject is
If not, proceed from #418 to #426 and check the microcontroller
The MCB performs the same processing as in the case of front lighting. On the other hand, in #417, the microcomputer MCB
If it is determined that it is possible to make it appropriate, #421
Proceed to , and the microcomputer MCB found the aperture value using #416.
Sync shutter speed to image value Avd Shutter limit
A brightness value Bvx that becomes appropriate by setting the speed Tvx is determined.Bvx=Tv+AvdSv. Then, the microcomputer MCB controls the control brightness value Bv
c and the brightness value Bvx are compared (#422). In #422, if Bvx≧Bvc, the subroutine
Go to "Flash calculation" and control shutter speed
Determine Tv and control aperture value Av from control brightness value Bvc
($423). At this time, as described above, Bvc=Av+Tvx Sv holds true. On the other hand, according to #421', Bvx=Av
d+Tvx Sv holds true. Therefore, Bvc-Bvx”Av Avd holds true. Therefore, if Bvx<Bye, then Av>
Avd, and the control aperture value Av ensures that the amount of light is not insufficient.
It becomes larger than the maximum aperture limit Avcl,
The main subject is underexposed due to insufficient light output.
cormorant. Conversely, if Bvx≧Bv, Av≧Avd,
With the control aperture value Av, there is no shortage of light emission. that's all
As in #422, the brightness values B vc, B vx
to determine whether the main subject will be underexposed.
do. As a result of the determination, if Bv<Bvc, #4
Proceed to step 24 and set the control brightness value Bvc to the brightness value Bvx.
, repeat the process from #411. This makes the background
Even if the image is overexposed, the main subject will be properly exposed.
. In #422, if Bvx≧Bvc, the microcomputer M
When the CB judges, the subroutine [Flash operation J (
#423. Proceed to Fig. 22) and control shutter speed T.
v, determine the control aperture value Av. Then proceed to #425
nothing. In #425, the main unit in the flash circuit FLC is
The charging voltage of capacitor MC has reached the specified voltage.
Determine whether or not. 6th bit FO of data FCRo
When Ro5 is set, the microcontroller MCB
The charging voltage of capacitor MC has reached the specified voltage.
If so, proceed to #428, otherwise proceed to #42
Proceed to step 7. In #427, the microcomputer MCB connects the main capacitor M
In order to display on the display circuit DSP that C is being charged.
, store “11” in display data FLD2, and then
, similarly to the case of front lighting, the processing from I 429 onwards is performed. death
Therefore, in this case, from the main subject's brightness Bvs,
Control shutter speed Tv and control aperture value Av are determined
be done. In #428, the microcomputer MCB
Display on the display circuit DSP that it is in optical mode.
Therefore, "01" is stored in display data FLD2, and
After that, proceed to #436. In #436, the microcomputer MCB is
, the dimming signal FSTP is output from the flash circuit FLC.
The dimming signal FSTP is output.
If it is determined that the
In order to display the data, "10" is stored in the display data FLD.
error #437), the dimming signal FSTP is not output.
If it is determined that charging of the main capacitor MC has been completed.
In order to display on the display circuit DSP that the
"01" is stored in the data FLD ('#438). So
To enable flash emission, the data CFR,
6th place Pi) CFR. , please reset #439) in the flash circuit FLC.
To allow the operation of the display circuit FDP and display device,
Data CFR, 7th place Pi) CFR. 6 (#440) and execute the data set routine (
Proceed to the AE routine (tlIJ5 diagram #26)
) Return to Next, let's talk about low-brightness forward lighting and low-brightness backlighting.
explain. In these cases, to prevent camera shake,
Set the shutter speed to the camera shake limit value Tvl+ or higher.
In addition to setting it to a high speed, it also reduces the amount of light that is insufficient.
To compensate, the photo was taken with a flash.
Ru. In these cases, if you proceed from #401 to #402, the high brightness
Unlike in the past, the microcomputer MCB was able to capture the main subject in #402.
Judging that the brightness Bvs is within the camera shake area #40
Proceed to step 7 and set the low luminance flag LLF. and,
Based on the background brightness Bva, low brightness forward lighting and low brightness backlighting
It is determined which is the case (I 408). That is, the first
It is determined whether the area is the area marked ■ or the area marked ■ in FIG. 35. My
When the con MCB is in low brightness front light (■ in Figure 35)
area), the process proceeds to #410 and the control brightness is
The value Bvc is IEv from the camera shake limit brightness Bvl+
Set it so that the exposure is angular. That is, B v
c=Bvh+1. This means that the main subject cannot be properly photographed using only constant light.
Make sure that the control shutter speed T~ is the camera shake.
camera shake is set to a high speed higher than the limit value Tvl+.
can be prevented. On the other hand, when the microcomputer MCB is under low brightness backlight (see Figure 35)
If it is determined that the
, as in the case of backlighting, make sure the main subject is appropriate and the background
or control the exposure so that it is overexposed by IEv than the correct exposure.
Set the control brightness value Bvc. That is, Bvc=Bva-1. After that, proceed from #411 to #417 as in the case of backlighting.
, if Avd≧Avo in #417, the microcomputer MCB
Once determined, the same processing as in the case of backlighting is performed. #41
At 7, Avd<Avo and 7 lash light is filled.
The microcomputer MCB determines that the exposure is insufficient.
And since the low brightness flag LLF is set,
1), which is different from the backlighting case, proceed from #418 to #419. #419 sets the control shutter speed Tv to the camera shake limit.
the control aperture value Av.
Set to maximum aperture value Avo ($420). This is from this
, you can minimize the degree of underexposure.
Ru. Then, proceed to #425, and the microcomputer MCB
Perform exactly the same processing as in the case. [Exposure Control] FIG. 24 shows a flowchart showing the subroutine "Exposure Control j".
It is a chart. Press the release button to the second stroke.
When the release switch S2 is turned on, the microcomputer M
CB goes from AE routine (Figure 5) #32 to #33;
That is, the process advances to #451 in FIG. 24 and is processed. First, add the release switch to the drive circuit DDR) RL
Sends data to move M away, and creates a diagonal hole in the photographing optical path.
The lens is removed from the photographing optical path and the aperture 1) is stopped.
It is released and the narrowing down is started (#451). Continued
Therefore, the microcomputer MCB determines that the control aperture value Av is the open aperture value A.
It is determined whether it is equal to vo (#452). and,
If the control aperture value Av is equal to the open aperture value Avo, the
Con MCB. Magnen 1-AP immediately appears on the drive circuit DDR.
Send data to leave M and stop narrowing down (t
F453), proceed to #457. On the other hand, the control aperture value Av is
If it is not equal to the open aperture value Avo, the microcomputer MCB will
, the difference between the control aperture value Av and the open aperture value Av, i.e.
Event counter for information on Av Avo
Sera I/L ($454), “H” from terminal P Is
Outputs the encoder ENAP to the counter terminal CNT.
($455) -0 and my
Con M'CB is $45 to enable counter interrupt CNT.
6), proceed to $457. Event counter or counter interrupt when imprinting is completed
Counter interrupt routine CNT (Fig. 10)
), the microcontroller MCB is dry.
Data to separate the aperture magnet APM to the block circuit DDR
data, and the narrowing down operation is completed. In I457, the microcomputer MCB has the mirror completely photographed.
Wait until you move out of the optical path. In addition, when waiting for this
The time is longer than the time required to stop down to the minimum aperture.
It is set for a long time. Then, the microcomputer M CB uses the corrected 7-Lanschule tone.
The actual reference value Sv1α is sent to the photometry interface LIF.
Output ($458). Then, the interface LI
F converts the reference value Sν0a using the built-in D-A converter.
Converts to FSL signal, which is an analog quantity, and performs flash light measurement.
Output to constant circuit LMF. As mentioned earlier, the 7-runche light measurement circuit LMF receives light.
It is equipped with an element FDP. The photodetector PDF is a photographic lens
The aperture aperture allows the subject light to pass through and reflect on the film surface.
Receive light. 7 Runche light measurement circuit LMF has its light receiving element.
Logarithmically compresses the output current of the child P D F and converts it into voltage.
Ru. Then, information Sv regarding film sensitivity and light emission amount compensation are provided.
Calculate the sum Sv0(r) with the positive quantity α, and calculate the voltage compressed by the number of months.
After adding the voltage corresponding to the sum Sv+α to
Logarithmically expand the added voltage and convert it to current. On the other hand,
When contact S× turns ON, the 7 lash control circuit FCC will
Outputs the light emission start signal STA and also outputs the integration start signal
15TA, terminal, 7 run optical measurement circuit through J7
Output to LMF. In response to this signal l5TA,
7 Runcie light measurement circuit, M P is extended by the number of months.
Start integrating the current. Then, the integral value is
When the light intensity level is reached, the flash light measurement circuit L M
F is the -131,- terminal for the dimming signal FSTP. Output to flash control circuit FC, C via
do. Then, the flash control circuit FCC stops emitting light.
Outputs signal 5TOP to stop flash emission. Therefore, the amount of light emitted decreases by the amount equivalent to the correction amount α.
As planned, the main subject was shot with flash light and natural light.
Proper exposure will be obtained. In addition, the specific configuration of the flash light measurement circuit LMF
is shown, for example, in Japanese Utility Model Application No. 61-121034.
It is. Next, the microcomputer MCB connects the drive circuit DDR to the shirt.
Send the data that will cause the I C"M to defect,
Run the shutter front curtain ($459). And, the microcomputer MCB measures the exposure time and costs $46.
0), when the exposure time is equal to the control exposure time, the dry
The shutter magnet 2CM is separated from the circuit DD'H.
data to run the shutter rear curtain (j 46
1>. After that, the microcomputer MCB outputs “L” from the terminal P Is.
” and outputs the encoder ENLE to the counter terminal CNT.
($4)
62). -132, One by one, the microcomputer MCB has a shooting completion detection switch S.
, waits until ONi occurs (I 463). As mentioned earlier, this switch S lowers the mirror and
When the aperture is opened and the rear shutter curtain has finished moving.
It turns ON when When Switch S is turned on, my
Con M CB adds 1 to display data CHD ($46
4) Output the display data to the display circuit DSP and calculate the number of shots
, exposure information etc. are displayed on the display circuit DSP ($465
). Then, the microcomputer MCB drives the drive circuit DDR.
Film feed motor M to motor control circuit MOD via
Sends data to drive OFI and winds the film.
Let's do it ($467). As a result, Volume J [structure
The churn mechanism is activated, and the shutter, mirror, and crest 8!
The structure is charged. And microcomputer M CB
waits until the shooting completion detection switch S4 turns OFF.
($468). As mentioned earlier, 1, Sinch S, is
, film roll, shutter, mirror, aperture machine
When the structure has finished churning, the OFF-” (Konaru.
When switch S is OFF+, the microcomputer MCB will
Filters to the motor control circuit MOD via Ibuka DDR.
Send data to stop the system feed motor MOFI (#4
69). , After that, the microcomputer MCB executes the switch determination routine.
Proceed to II (Figure 17). In addition, since it is unrelated to the gist of the present invention, 70-char
Although it is not shown in the figure, the film winding mh
During the film, the microcomputer MCB noticed that the film was stretched out.
When detected, it is configured to move to film rewind operation.
It is. The above describes the photometry switch of the camera system according to this embodiment.
S6, operation when AE lock switch ALS is turned on
End the explanation. [Stem Reset] Figure 25 shows the subroutine "System Reset".
It is a flowchart. Proceeding to this subroutine, the
The icon MCB sets the exposure control mode of the camera system to P.
mode and set the flash device to automatic firing mode.
In addition to setting automatic light control mode and automatic coverage angle switching mode.
mode (auto). As mentioned earlier, when you turn on switch SR3
, the interrupt terminal INTo falls, and the microcomputer MCB
It operates according to the flowchart shown in FIG. stop
So, the microcomputer MCB is #1 → #2 → #3 → #10 → #
After 13 steps, the subroutine [System Resen N]
(#14), that is, the flowchart shown in FIG.
Processing starts from step #601. First, the microcomputer MCB sets the mode register MOR to 1.
00" and set the exposure control mode to P mode.
#601. ), displays the exposure control mode on the display circuit DSP
In order to
(ie, rooJ) (#602). and
, the microcomputer MCB sends the display circuit DSP the control exposure value and the
Indicates launch data, focus status, and AE lock.
In order to erase the display, enter the display data "LD",
, FLD, "00"(#605.I60
6) Store and display data T, VD, AVD with blank table
Display data BLD (I60-13.5-3, I604), display data FLD, , F
i-1) Add “00” to 2 (I605.$606),
roll ($607) to the display data AFD, and the display data
"0" is stored in the data ALD (well 608). after that,
The microcomputer MCB controls the exposure control mode for the flash device.
In order to inform that the is in P mode, data CF R8
"00" in the second-order 2 bits CF R, 7, CF Ro6
” is stored (#609). In addition, the flash circuit FL
System reset of flash device to microcomputer MCF in C
In order to perform the cut, the microcomputer MCB sends data C,
FR: Set C, FR, 7 (the highest pitch of l), and
Display circuit FDP and display C in the flash circuit FLC
To stop HD operation 1. The first frame of data CFR3
Set the invalid bit CFR,6 to 1 (#610). When the above data settings are completed, the microcomputer MCB
The display data is sent to the display circuit DSP via the data bus SDB.
(#611), flash data CFR,~3 is flashed.
output to the reset switch FLC (#-1.3 [3) The microcomputer MCB outputs the reset switch SR8
Wait until it turns OFF (#61.3). If "H" is input to terminal P8, microcomputer MC,
B has 7/to switch SR3 is determined to be OF or F.
Then proceed to #614. Therefore, the reset switch S
Even if you press and hold R8 once, the system will not be reset.
It is only done once. Reset switches SR and S are OFF
When it reaches F and goes to #614, the microcomputer MCB
A system reset is sent to the microcomputer MCF in the flash circuit FLC.
The most recent data CIR, to signal that the
Reset the upper PIP) CFR3. Then this service
Get out of the routine and use the 5 TOP routine (8th step) mentioned above.
The microcomputer M CB receives the interrupt INTo again.
Wait until called. [Exposure control mode change] Figure 26 is a flowchart showing the subroutine "mode change"
It is a chart. In this subroutine, the microcomputer MC
B changes the exposure control mode of the camera system. In addition
, as mentioned earlier, mode selector switch MO3 is ON.
Each time, the exposure control mode changes to P-3-A-M-, P...
・Changes. As mentioned earlier, turn on the mode selector switch MO3.
Then, the interrupt terminal INTo falls and the microcontrollers M and C
B is step #1 of the flowchart shown in FIG. #
2. #3. $10. $13. Subroutine after $15
"Mode change" (I 16), that is, as shown in Figure 26.
Processing starts from step #701 of the flowchart. First, the microcontroller MCB stores the contents of the mode register MOR.
($701'), and the contents of register MOR are "1".
1”, store “00” in register MOR $7
02), if the contents of register MOR are not “]1”, the register is
Increment register MOR, i.e. register M
Add 1 to the contents of OR. Setting mode register MOH
Once completed, the microcomputer MCB is exposed to the display circuit DSP.
To change the control mode display, register MOH
Transfer the contents to display data MOD ($704). Then, the microcomputer MCB sends a flash to the display circuit DSP.
Display of flash data, focus status, and AE focus status
In order to erase the display data, set the display data to FLD, , FLD2.
"00" ($705), "00" in the display data AFD
(#'706) and store "0" in the display data ALD.
(#Ma07). Next, the microcomputer MCB
Determine whether the mode has been switched to the output control mode (I 708~
$710). Exposure control mode was switched to M mode
In this case, the previously set shirt tasby-1'Tvs
and aperture value Avs on the display circuit.
The controller MCB is connected to the shutter set in the display data TVD.
Store data speed Tvs ($711), display data
Store the aperture value Avs set in ΔVD ($712
). When the exposure control mode is switched to S mode,
Displays only the previously set shank speed Tvs.
In order to display it on the circuit DSP, the microcontroller MCB
The shutter speed Tvs set in the display data TVD
($713), display data A V D is blank.
Store the block display data BLD ($714). When the exposure control mode is switched to A mode, the
Only the previously set aperture value Avs is sent to the display circuit DSP.
In order to display, the microcomputer MCB inputs display data TVD.
Store blank display data BLD in ($715), table
The aperture value Avs set in the display data A V D is stored.
(4$716). Exposure control mode switches to P mode
, the display circuit displays the shutter speed Tv and aperture.
In order not to display the value Av, the microcomputer MCB
, display data TVD, and AVD.
Store link display data BLD ($717.#718
). Setting of display data TVD and AVD is completed.
and transmits the exposure control mode to the flash circuit LFC.
Therefore, the microcomputer MCB has the upper two
Bit CFRo7. Mode register MOH in CFRo6
Transfer the contents of ($719). And flash times
Operation of display circuit FDP and display CHD in circuit FLC
In order to prohibit the data CFR
3, 7th bit CFR: set 16 (I 720
). After setting display data and flash transfer data,
, the microcontroller MCB performs display times via the data bus SDB.
Display data to DSP ($721), flash circuit
Transfer 7 rush transfer data to FLC ($72
2). After that, the microcomputer MCB switches the mode changeover switch MO3
Wait until it turns OFF ($723). Therefore, even if switch MO3 is kept on, the exposure
The output control mode does not change. Switch MO8 is OFF
When this happens, exit from this subroutine.1. The 5T mentioned earlier
Proceeds to the OP routine (Figure 8), and the microcomputer MCB restarts.
and waits until the interrupt INTO is issued. [Data setting] Figure 27 is a flowchart showing the subroutine "data change"
It is a chart. Set either the data setting switch US or DS to O.
When set to N, as mentioned earlier, the interrupt terminal INT. falls, the microcomputer MCB starts the flow shown in Figure 4.
Works according to chart. And #1 → #2 → #3
→ After steps #13 → #15, the subroutine [data
data change J ($17), that is, the flow shown in Figure 27.
Processing starts from step #80, 1 of the chart. First, the microcomputer MCB determines the exposure control mode (
#801 to #803). And the exposure control mode is set to M mode.
If the mode is set, proceed to #804 and set the shutter speed T v
s or aperture value Avs which is about to be changed.
is determined (#804). Selector switch ASS is ON
If “L” is input to terminal P14, my
Con MCB indicates that the aperture value Avs is about to be changed.
After making a judgment, the process proceeds to #805 to change the aperture value Avs. On the other hand, the changeover switch ASS is OFF and the terminal P1
If I(” is input in 4, the microcomputer MCB
It is determined that the shutter speed Tvs is about to be changed.
Then proceed to #806 to change the shutter speed Tvs.
let When the exposure control mode is A mode, the microcomputer MCB
, regardless of the 0N-OFF state of the changeover switch ASS.
, change the aperture value (#807), and set the exposure control mode to S.
mode, the microcomputer MCB controls the switch ASS.
Regardless of the 0N-OFF state, the shutter speed Tv
s is changed (#808). And shutter speed Tvs or aperture value Avs
After changing the shutter speed Tvs.
Or display only the aperture value Avs on the display circuit DSP.
Therefore, the microcomputer MCB outputs the display data TVD or
is the shutter speed Tvs changed to AVD or
Stores data indicating aperture value Avs and displays display data AVD
Or store blank display data BLD in TVD.
($809~#816). Note that when the exposure control mode is P mode, the shutter
Speed T vs and aperture value Avs settings are not performed.
Therefore, even if you proceed to this subroutine, the microcomputer MCB is
, without changing the data and also adding shutter speed to the display circuit.
In order to prevent the display of the mode Tvs and aperture value Avs,
Blank display data BLD for display data TVD and AVD
(I817.8818). Shutter speed Tvs, aperture value Avs changes and table
After setting the display data TVD and AVD, the microcomputer M
CB displays focus status on display circuit DSP, AE lock
To turn off the display and flash information, change the display device.
Store “oo” in the data AFD (#819), display data
taALDl: rOJ (#820), display Q 9 F
L'D, i:ro OJ (#821), display team
9 F LD 2f: ro 0 J all retracted (#
822). And the table in the flash circuit F'LC
To stop the operation of the display circuit FDP and display CHD.
Therefore, the microcomputer MCB inputs the 7th bit of the data CFR.
Set CFR36 (#823). Then, the microcomputer MCB transmits data via the data bus SDB.
Then, output the display data to the display circuit DSP (#824)
, outputs 7-lash transfer data to flash circuit FLC
($825). When the data output is finished, the microcomputer M CB is set.
I waited until both switches US and DS were turned off.
Later ($826.$827), it was extracted from this subroutine.
Then, proceed to the 5TOP routine (Fig. 8) mentioned above, and repeat the process again.
, waits until the interrupt INTo is issued. Figure 28 shows the subroutine "data change" (Figure 27)
Flowchart indicating "subroutine JTv change that appeared in
It is a chart. In this subroutine, 1.
When the setting switch U S #f is ON, B is
Increase the block speed Tvs by IEv and set the setting switch.
When CHDS is ON, the shutter speed Tvs is set to IE.
Decrease by v. First, the setting switch US of the microcomputer MCB is ON.
It is determined whether or not (#831). And terminal PI
When “L” is input to O, the microcomputer MCB
It is determined that the switch US is ON, and the process proceeds to #832.
If not, it is determined that the setting switch DS is ON.
Then proceed to #833. If the setting switch US is ON and you proceed to #832, the master
Icon MCB has shutter speed Tvs only IEv.
increase. And the changed shutter speed Tvs
is the camera body's maximum shutter speed Tv+n (T)
For example, if it is faster than 1/4000 second) (#8.3
4) Set the shutter speed Tvs to the highest shank speed.
The setting is set again to ``Do Tvm''(#836). If the setting switch DS is ON and you proceed to #833, the master
Ikon MCB has a shank speed Tvs of 1. It's EV
decrease. Then, the changed shutter speed Tν
S is the camera body's longest shutter speed Tvo (and
(for example, 30 seconds) ($385), the
Set shank speed Tvs to longest shank speed Tvo
Try again (#837). After changing the shank speed Tvs, the microcomputer M
CB returns to the subroutine "data change" (Figure 27).
Continue processing. Figure 29 shows the subroutine "data change" (Figure 27)
Flowchart showing the subroutine “Av change” that appears in
It is a chart. In this subroutine, the microcomputer MCB
When the setting switch US is ON, the aperture value Avs
Increase it by 1/2Ev and set the setting switch DS to ON.
If so, reduce the aperture value Avs by 1/2 Ev. First, the setting switch US of the microcomputer MCB is ON.
($84.1) And the terminal
If 'L' is input to P10, the microcomputer MCB
determines that the switch US is ON and proceeds to #842.
, otherwise it is determined that the setting switch DS is ON.
Cut and proceed to #843. If the setting switch US is ON and you proceed to #842, the master
Ikon MCB increases the aperture value Avs by 1/2 EV.
let Then, the changed image value Avs is the maximum value of the photographic lens.
From large aperture value Avm (input from lens circuit LEC)
is also large (#844), set the aperture value Avs to the maximum aperture value.
Reset Av cod 2 (#846). If the setting switch DS is ON and you proceed to step 843, the master
Ikon MCB reduces the threshold value Avs by 1/2EV.
let Then, the changed aperture value Avs is the open aperture value Av
If smaller than o (#845), open the aperture value Avs.
Reset the aperture value to Avo (#847). After changing the aperture value Avs, the microcomputer MCB
Return to the routine “Data Change” (Figure 27) and process
Continue. [Microcomputer MCFI Figure 30! @Figure 34 shows the camera system of this example.
The microcomputer in the 7-run system (Figure 3)
70-Chart showing the operation of MCF. [INTA] Dimming mode selector switch ATS, irradiation range selector switch
■Of C8 and light emission mode changeover switch MES,
When one of the switches is turned on, the microcomputer MCF
Interrupt terminal INTA falls, and at the falling edge
In synchronization, according to the flowchart shown in Fig. 30,
The microcomputer MCF starts operating. First, the microcomputer MCF determines which interrupt
Determine whether it is applied by operating the switch (#5
001. $5002). That is, in #5001
, if terminal P20 is “L”, the microcomputer MCF
Interrupted by operating optical mode selector switch A, T S
It is determined that I NTA has been applied and proceeds to $5003.
If the terminal P2o is "H", the process advances to #5002. @5
In 002, if the terminal P21 is “L”, the microcontroller
The MCF can be set by operating the irradiation range selector switch C8.
It is determined that an interrupt I NTA has been issued, and the process goes to I5021.
move on. In #5002, if terminal P21 is “H”
For example, the microcomputer MCF will turn off the light emitting mode for interrupt INTA.
It is determined that it was applied by operating the replacement switch MES.
, proceed to the MES routine (FIG. 31). "Dimming mode switching" Interrupt IN by operating the dimming mode changeover switch ATS
If TA is applied, the microcomputer
The MCF examines the state of the 7-lag STF. To $5003
If 7 lag STF is set, $5004
Proceed to #500 if the 7 lag STF has been reset.
Skip to 5. In #5004, the microcomputer MCF is
, examine the camera system's exposure control mode. exposure control
If the mode is M mode, proceed to #5005 and
If not, proceed to #50'09. At $5005,
The icon MCF checks the flash dimming mode. Self
If the dynamic dimming flag AMF is set to 1, the microcontroller M
The CF determines that it is in automatic light control mode and proceeds to $5006.
and reset the flag AMF to cancel automatic light control mode.
do. And in order to display this on the display circuit FDP.
Therefore, the microcomputer MCF sets “10” to the display data AMD.
Store (#5007). Then, the microcomputer MCF
, outputs ``H'' from terminal P14 and flash control.
A signal is sent from the camera body to the control circuit FCC via terminal J6.
The incoming dimming signal FSTP is ignored (#5008
). After that, the microcomputer MCF executes the DISP routine (first
Proceed to Figure 32) to control the display CHD and display data.
Outputs and waits until the next interrupt is issued. On the other hand, in #5005, flag AMF is reset.
The microcomputer M CF i upper white a dimming mode
It is determined that the code is not correct and advances by $5009-5. #500
9, the microcomputer MCF sets the flag AMF.
Set to automatic dimming mode and indicate this to the display circuit FDP.
Store “01” in the display data AMD to display it.
($501.0). And the microcomputer MCF has a terminal
P3. Outputs “L” and adjusts to the flash control circuit.
Accept the optical signal FSTP (#5011) and
control (Fig. 32) and control and display the display CHD.
Output data. Then, the microcomputer MCF
Waits until the next interrupt is issued. As described above, the camera system used in the camera system of this example
The flash device has flag STF reset, i.e.
, flash device independent from the camera system, can be produced by itself.
Regardless of the exposure control mode, the flash control mode is
The mode is switched, but the 7-lag STF is set and all
i.e. the flash device is part of the camera system.
When activated, the exposure control mode is M mode.
Only when the dimming mode is switched and the exposure control mode is
In P, A, S mode (i.e. automatic call control mode)
In some cases, the dimming mode is forced to auto dimming mode.
determined. This allows the master to ignore the dimming signal FSTP.
Manual light control mode (7-1.52-inch device emits full light) and automatic exposure control mode.
In other words, there is a risk that proper exposure may not be obtained.
No photography will be allowed. "Irradiation range switching" Irradiation range switching switch ■ Interrupt INT by operating C8
If A is applied, the microcomputer MCF will be $E5021
Go to and add 1 to the irradiation range register FZR. The result
As a result, if the content of Renostar FZR is "101" 1 (#
5022), the microcomputer MCF is connected to the Resostar FZR.
Store 0OOJ (#502'3), that is, auto
Set. If the irradiation range is auto, the microcomputer MC
F checks the state of the 7-lag STF (#5024). And if the flag STF is set, i.e.
, the flash device operates as part of the camera system.
If the camera body is equipped with
The angle of view of the lens (focal length Fv (appenx value)) is 7 runs.
The microcomputer MCF focuses the light so that it can cover the light.
Depending on the distance Fv, IQ O1,J (28Lnan),
"010 J (35mm),"011" (50m+n)
, rl OOJ (70+nm)
radiation range detection register (built in the microcontroller MCF)
). Then, move to the position corresponding to that data.
to move the light emitting panel (#5025). On the other hand, at $5024, the 7-lag STF is reset.
i.e. the flash device is connected to the camera system.
When operating independently from the system, the microcontroller
MCF irradiates data of ro 01 J (28mm)
Set in range detection register. And the microcomputer MCF pulled the light emitting panel the most.
Position (angle of view of a photographic lens with a focal length of 28m+n)
to a position that can be covered by 7 lashes of light (#
5026). Also, the contents of register FZR in I50221 are “
101", that is, if it is not auto, the
The MCF inputs the contents of register FZR to the irradiation range detection register.
Transfer to Star. And the value of the microcomputer MCF is
The angle of view of the photographic lens with the focal length shown is 7 lashes of light.
Move the light emitting panel to the position where it is covered (#5
027). #5025. $5026. Light emitting panel in #5027
Please refer to Figure 3 for more details on the movement of the wheel.
Explain clearly. Move the light emitting panel forward from its current position.
For example, register FZR = [011J.
Therefore, the light emitting panel is attached to a camera with a focal length of 35 mm.
From the position (010) that covers the angle of view of the shadow lens,
It has a focal length of 50+n+o which is in front of the position.
Move to position (011) that covers the angle of view of the photographic lens
When the microcomputer MCF
Outputs a forward rotation signal to the motor control circuit MDR and controls the motor.
Circuit MDR rotates motor MOFL in the normal direction. Then, the place
The position detection circuit ZCP outputs a signal according to the position of the light emitting panel.
The microcomputer MCF outputs the signal to terminal P281P2.
Enter from 9. Then, the light emitting panel indicated by that signal
The position matches the position indicated by the irradiation range detection register.
Then, the microcomputer MCF connects the motor from terminal P2G1P27.
A stop signal is output to the control circuit MDR, and the motor control circuit M
DR stops motor MOFL. In addition, the luminous panel
When moving the motor backwards, change the rotation direction of the motor MOFL.
When moving the panel forward, the panel is simply reversed.
It is similar to In addition, to change the irradiation range, use the light source on the front of the light source.
In addition to changing the position of the light panel, it also changes the reflection of the light emitting part.
The shape of the umbrella can be changed, and the Xe tube that is the light source can be changed.
The position may be changed. In addition, the panel on the front of the light emitting section
The transmission characteristics of the channel can be changed by mechanical movement,
Alternatively, the panel may be formed of electro-optic elements and their transmission characteristics
The properties may be changed electro-optically. Returning to FIG. 30, the explanation will be continued. #5025゜#502
6. At $5027, if you move the light emitting panel,
The microcomputer MCF has an angle of view covered by the flash light.
The focal length of the shooting lens and auto/manual mode.
In order to cause the display circuit FDP to perform display, the display data F
Store data indicating display contents in ZD (#'502
8). Specifically, if the contents of registers F and ZR are "000",
In other words, if the irradiation range is auto, the microcomputer
MCF stores “1” in the most significant bit of data FZD
Then, the lower 3 bits of display data FZD display the camera body.
rOOI J according to the focal length information FV input from the
(28+om), ro 10 J (35+em), IQ
11 J(50+n+n), rl 00 J(70t
n1n) is stored. Also, the cash register
If the contents of Star FZR are not “0OOJ,”
If the irradiation range is manual, the microcomputer MCF
Store “0” in the most significant bit of data FZD, and
Transfer the contents of register FZR to After that, the microcomputer MCF changes according to the change in the irradiation range.
Store the maximum light emission amount Iv in the data FCR, #5
029>, proceed to the DISP (FIG. 32) routine. [Light emission mode switching 1 Figure 31 is a 70-chart showing the MES routine.
Ru. Interrupted by operating the light emission mode selector switch MES
If INTA is applied, #5001 and #5002 are
Then proceed to this routine. First, the microcomputer MCF writes the light emission mode register FMH.
Add 1 (#5031). This register FMR is
Indicates the light mode, and its contents are “00” and “01”
, "10", forced flash mode, automatic flash mode, respectively.
Indicates dynamic light emission mode and non-light emission mode. As a result of adding 1 to register FMR, the contents of register FMR
If the value becomes 111” (#5032), the microcomputer MCF
stores “oo” in register FMR, i.e. forces
Switch to light emission mode (#5゜33). Next, Maiko
The on-MCF checks the state of the 7-lag STF ($5034).
). 7 If the flag STF is set, i.e.
If the lash device is operating as part of the camera system.
Proceed to rebo #5゜35, 7 lag STF is reset
If so, that is, the flash device is a camera system.
#5041 Skip
Click. At $5035, the microcontroller MCF has a camera system.
Check whether the stem exposure control mode is P mode or not.
Ru. If the exposure control mode is P mode, the microcomputer MC
F should store “01” in register FMR #5036
), switch the flash mode to automatic flash mode. $50
35, if the exposure control mode is not P mode, #
Skip to 5041. At $5032, the contents of register FMH is "11"
If not, proceed to $5037 and the microcomputer MCF will check the cash register.
Whether the contents of the star FMR are [01,,l or not, that is,
In other words, whether the flash mode can be switched to automatic flash mode or not.
Find out. And the contents of register FMR is "01"
In other words, the contents of register FMR are "10".
Yes, and the emission mode is set to non-emission mode (if switched to
If so, skip to #5041. At $5037, the flash mode is switched to automatic flash mode.
If the microcomputer MCF determines that it has been replaced, $503
Proceed to step 8 to determine the state of the 7-lag STF. #5038
If the 7-lag STF is set in
If the flash device operates as part of the camera system,
If so, proceed to #5039 and reset the 7-lag STF.
i.e. the flash device is connected to the camera system.
If it is independent from the system and operates independently, it will go to well 5041.
skip. In $ jo 39, the microcomputer MCF is
, Is the exposure control mode of the camera system set to P mode?
Determine whether or not. If the exposure control mode is P mode,
Skip to #5041 and set exposure control mode to P mode.
If not, proceed to #5040, and the microcomputer MCF registers
Data FMR+2 "10" is stored. In other words, the non-emitting mode
switch to mode. The above operations can be summarized as follows. flash
The device is independent from the camera system and operates as a single unit.
If there is a
The flash mode may change from forced flash → automatic flash → non-flash → strong flash.
Switches from flash control →... Flash device is camera
If operating as part of a system, the camera system
If the camera's exposure control mode is P mode, switch ME
Depending on the S operation, the flash mode changes from automatic flash → non-flash →
Automatic flash →... and the exposure control mode changes to P mode.
If it is not in
Switch. i.e. the flash device is connected to the camera system.
When operating as part of a system, the exposure control mode is P.
mode, you can switch between automatic flash mode and non-flash mode.
The exposure control mode is set to A, S, or M.
In either mode, forced flash mode and non-flash mode
(see Table 10.11). The light emission mode is switched according to #5031 to #5040.
When the flash mode is set, the microcontroller inside the camera body
In order to inform the MCB, the microcomputer MCF uses the data FCR
, the upper two bits of FCRo, . Transfer the contents of register FMH to o7 (i5041
). Then, display the light emission mode on the display circuit FDP.
Therefore, the microcomputer MCF registers the display data FMD.
Transfer the contents of FMR (#5042). After that, D.I.
Proceed to the SP routine (Figure 32). "DIsP Routine" Figure 32 is a flowchart showing the DISP routine.
be. When proceeding to this routine, the microcomputer MCF first
, examine the growth of the 7-lag STF (#5051'). 7 la
If the log STF is set, proceed to #5052 and run 7 times.
If the STF has been reset, the process advances to #5068. Na
As described later, if you proceed to #5068, the display time will be
FY3P is distance linked range, film sensitivity Sv, control aperture.
Clear the display of the fill value Av, and display the fullness table using the table thread device c I (D).
The display will be erased. #5052 ii, v A:7 N M CF C, D
Check the status of CFR36. As mentioned earlier, the microcomputer MCB inside the camera body
+-! , display circuit FDPi, 1:(/'display CI-
If you allow display by ID, data CFR3
resets the 7th bit CFR3, and prohibits its display.
Set when stopping. Therefore, data CFR3
If the 7th position pin) CFR, is set, then my
The controller MCF is connected to the display circuit Fl)P and the display CHD.
To make the display disappear, proceed to #5068 and confirm that it is
If it is Z, proceed to #5053. In I5053, the microcomputer MCF is the main capacitor
Check the charging status of MC. And the main capacitor M
When the charging voltage of C reaches a predetermined value (for example, 300V)
If so, go to #5054, otherwise go to #5067
move on. Here, we will explain how to detect the charging voltage of main capacitor MC.
, will be explained with reference to FIG. First, the microcomputer MCF outputs “+(”) from the terminal P, 31.
outputs and makes the transistor TR, conductive.
. If the charging voltage of main capacitor MC is lower than the specified value.
If so, the neon tube NE will not discharge and the transistor TR,
No current flows between collector and emitter. therefore
, no current flows into the charging detection terminal PTh2, and the terminal P
32 is "1.,...". After that, the charging voltage of the main capacitor Me reaches a predetermined value.
When the neon tube NE discharges, the transistors TR,
A collector-emitter current flows. therefore
, a current flows into the charging detection terminal P32, and the terminal P32
is HI+.6 The microcomputer MCF has terminal P32 set to HI+.
1", the main capacitor MC
It is determined that the charging voltage of has reached a predetermined voltage. Returning to FIG. 32, the explanation will be continued. In #5053, the charging voltage of main capacitor MC
has reached a predetermined value, and when proceeding to l$5'054, the master
The icon MCF is attached to the microcomputer MCB inside the camera body.
In order to convey this, data FCRo's 6th place pick
Set/distribute FcRO5. And the microcomputer MCF is
, terminal P7. Outputs “I” from and lights up the display CHD.
turn on the main capacitor MC and the charging voltage of the main capacitor MC reaches the specified value.
Display that it has been reached (#5055). Next, the microcomputer MCF checks the dimming mode ($
5056). Automatic dimming flag AMF has been reset.
In other words, if it is not automatic light control mode, #505
Proceed to step 7 and the microcomputer MCF will set the distance that will give you the proper exposure.
In order to calculate the distance and display the distance on the display circuit FDP.
Therefore, store the distance data in the display data FDD ($
505'8). Note that the microcomputer MCF is set at a distance that provides the most appropriate exposure.
The distance Dv, the maximum light output ■ν, and the information sent from the camera body.
From the obtained aperture value Av and film sensitivity information Sv, Dv=Iv+5v-Av is calculated. On the other hand, at $5056, the flag AMF is sent.
If it is in automatic dimming mode, #50
Proceeding to step 59, the microcomputer MCF determines the dimming distance range.
calculate. First, the microcomputer MCF has a maximum light output of 1v.
, the aperture value Av and the field value sent from the camera body.
From the luminous sensitivity information Sv, calculate Dv = I v + Sv - 'Av to calculate the maximum dimmable shooting distance Dv.
. Next, the microcomputer MCF determines the dimming minimum amount of light Iv.
'From D v''=I v''10'S v A v operation building line
Then, calculate the shortest photographing distance Dv' that can be dimmed. Also,
Microcomputer M CF is used when a flash device is attached to the camera.
When shooting, there is a discrepancy between the shooting angle of view and the irradiation range.
The shortest shooting distance DvI+ that does not occur and the calculated shortest shooting distance y
Compare with II distance Dv' and set the longer shooting distance to the shortest shooting distance.
Used as distance. In this way, the microcomputer MCF has a dimmable distance range Dν
゛(or Dv”) ~ Find Dv. Then,
The distance range Dv' (or Dv') to D
Store v data in display data FDD (#5060)
do. The microcomputer MCF stores data in the display data FDD.
When finished, the film sensitivity information Sv and aperture are displayed on the display circuit FDP.
In order to display the value Av, insert a film into the display data SD.
Store sensitivity information Sv #5061), display data FN
The aperture value Av is stored in D (#5062). after that,
The microcomputer MCF has display data AMD, FI) D, FM.
D, FND, FZ, D. Output ISD to display circuit FDP ($5063). After that, the microcomputer MCF resets the timer counter T.
In other words, when O is stored in the timer counter T,
, start the timer built in the microcomputer MCF.
($5064). And the microcomputer MCF
Timer interrupt by built-in timer and interrupt terminal INT
A, ■Enable interrupts INT, A,,INTB by NTB
#5065. #5066), any interrupt occurs
Special numbers until . On the other hand, in #5053, the main capacitor MC is charged.
The electric voltage did not reach the specified value and proceeded to #5067.
In this case, the microcomputer MCF is the microcomputer M in the camera body.
In order to inform CB of this, data F, CRo's number
Reset 6th bit F, C, Ro5, display circuit F
In order to erase the display by D I) and display CHD,
Proceed to #5.068. Proceeding to #5068, the microcomputer MCF first connects the terminal P.
Output “L” from 21 and turn off the display CHD.
. Next, the microcomputer MCF has a 7-runsch linkage range.
Display, film sensitivity information Sv display, aperture value Av display
In order to erase the display data FI) D, ISD, FND
Store blank display data BLD in (
$E5069. $5070゜#5071). then ahead
Proceed to the steps after step 5063 mentioned above and install the microcomputer MC.
F waits until the next interrupt is issued. In this way, if you proceed to $5068, the display CHD
Display of charging status of main capacitor MC, display times
7. Table and indication of flash interlock range by FDP. IL
The display of the camera sensitivity information Sv and the aperture value Av disappear.
It will be done. [INTB] Figure 33 shows the external microcomputer when the interrupt INTB is issued.
70-Chart showing the operation of MCF. This interrupt I
N and T B are microcontrollers MC in the camera body.
Multiplied by B. In FIG. 1, 7 runci data CFR0 to CFR,
and FCR, ,FCR, are serial data buses SD
In the microcomputer MCB and the 7-rush circuit FLC via B.
When transferred between the microcomputer MCF located in
The pin MCB receives a low level chip select signal from terminal P2.
Outputs the number C3FL. This signal C37L is the contact point, J
microcomputer M CF in the flash device via u.
It is input to the interrupt terminal INTB (see Figure 3). Interrupt terminal INT by chip select signal C3FI-
In synchronization with the falling edge of B, the microcomputer MCF
70 - Begin operating according to the chart shown in the figure. The microcomputer MCF first connects the flash device to the camera body.
Determine whether to transfer dehe data FCRo, FCR,
Check (#5091). Microcomputer MC inside the camera body
'B inputs flash data FCR0, FCR.
When the microcomputer MCB outputs a high level signal via contact J3,
The read signal of the microcomputer MCF is read/write determined.
Output to terminal P28. On the other hand, the microcontroller MCB is 7
When outputting the data CFRo-CFR3,
The controller MCB sends the low-level write signal to the microcontroller MC.
F, is output to terminal P23 (see FIG. 3). Therefore,
Microcontrollers M and CF check the status of terminal P23 and
If °'H'' is input in 23, proceed to #5092.
Output data FCRo and FCR1 to the camera body.
However, if "L11" is input to terminal P23, $
Proceed to 5101 and input data CFR, -CFR3
. Data input/output will be explained with reference to FIG. As mentioned earlier, between the camera body and the 7 lash device
The data CFR, -CFR,,FCR,,FCRl are transferred by
When sent, contact J. Low level from terminal INTB
chip select signal is input. camera body
Data CFRo-CFR3 is transferred from to the 7 lash device.
When the contact point and J3 are connected to the microcomputer as mentioned above,
L is input to the terminal P23 of the MCF. At this time
, the microcomputer MCF has a reference clock input terminal from contact J.
Contact J is synchronized with the reference clock input to child SCK.
Data is input from the serial data input terminal SIN connected to
Input the data CFR, , -CFR3 one pin at a time. 7 Data from runcie device to camera body FCR8,F
When OR, is transferred, as mentioned earlier, contact J3 or
and terminal P2 of the microcomputer MCF. nito(” is
ゝIt has been input. At this time, the microcomputer MCF
In synchronization with the reference clock input to SCK, contact J
From the serial data output terminal SOU'T connected to
Output data FC'Ro, FCR, one pin at a time
. Returning to FIG. 33, the explanation will be continued. Finished outputting data FCRo, FCR, at $5092
Then, the microcomputer MCF sets the timer counter T.
” and start the timer ($509
3), timer interrupt by timer, interrupt terminal INTA, I
Enable interrupts INTA and INTB by NTB (#5
094. #5095). Then, any interrupt
Wait until the # Input data CFRo-CFR3 at 51.01 and finish.
In other words, the microcomputer MCF controls the exposure of the camera system.
Check whether the mode is M mode (#5102)
. 7' -9CF Ro (n top 2 humans cF Ro
7. If the content of CF Ro6 is "11", the microcontroller
MCF determines that the exposure control mode is M mode.
Skip to $5105, otherwise go to #5103
move on. In #5103, the microcomputer M CF automatically adjusts the brightness.
Set flag AMF to set automatic light control mode. Then, the microcomputer MCF automatically controls the display circuit FDP.
In order to display the current mode, the display data A M
Store "01" in D (5104), to $5105
move on. 2, in the camera system of this embodiment, the camera
If the exposure control mode of the camera system is not M mode,
The dimming mode is forcibly set to automatic dimming mode. At $5105, the microcontroller MCF is the camera system's
Check whether the exposure control mode is P mode. day
(Top 2 pits of CFRo) CFR87, CFRos
If the value is “00”, the microcomputer MCF will control the exposure control mode.
It is determined that the code is in P mode and enters #5106,
Otherwise, proceed to #5107. #5106. In #5107, the microcomputer MCF emits light.
Check the mode. At $5106, the microcontroller MCF is
It is determined whether the light emission mode is a forced light emission mode. If the content of the light emission mode register FMR is "00",
The light emission mode of the microcomputer MCF is forced light emission mode.
Then, proceed to #5108 and write “10” in register FMR.
” and switches the emission mode to non-emission mode. On the other hand, in #5107, the microcomputer MCF selects the light emitting mode.
It is determined whether or not the is in automatic light emission mode. Luminous mode
If the contents of register FMR is “01”, microcontroller M
The CF determines that the flash mode is automatic flash mode,
Proceed to $5108 and store "10" in register FMH.
, switch the emission mode to non-emission mode. After the light emitting mode has been switched, the microcomputer MCF
To convey the light emission mode to the microcomputer MCB inside the lab body.
, data FCR, 7, FCRo, second sensor FMR.
Store the contents (#5109). And display circuit FD
In order to display the light emission mode on P, the microcomputer MCF
Set the display data to FMD and store the contents of register FMR.
(#5110). In this way, in the camera system of this embodiment, exposure control
When the mode is P mode, the flash mode is forced flash mode.
mode, the microcomputer MCF will release the forced flash mode.
The light is turned off and switched to non-emission mode. Also, exposure control
If the mode is not P mode, the flash mode is auto flash mode.
mode, the microcomputer MCF will release the automatic flash mode.
(Table 10.11)
reference). When the display data FMD is set in #5110, the microcomputer
The MCF determines whether a system reset has been performed.
(#5111). Data CFR. If CFR3□ is set, my
Con MCF determines that a system reset has been performed,
Proceed to $5112 to #5117 to reset the flash device.
Set, otherwise skip to $5118
do. In #5112, the microcomputer MCF sets the light emission mode control.
Store “01” in register FMH and automatically fire the light emission mode.
Set to light mode. Then attach the light emitting monitor to the camera body.
In order to inform the microcomputer MCB in the microcomputer MC,
F is the upper 2 bits of data FCRo7. F.O.
Store the contents of register FMR in Ro6 (I5113
). At the same time, display the light emission mode on the display circuit FDP.
Therefore, the microcomputer MCF registers the display data FMD.
The contents of the data FMR are stored (#5114). Continuing,
The microcomputer MCF sets the automatic dimming flag and starts the dimming mode.
Set the light to auto dimming mode ($5115) and display times.
To display on the FDP that it is in automatic dimming mode.
, stores “01” in display data AMD ($$511
6). After that, the microcomputer MCF writes the irradiation range register FZR.
Store “000” and set to auto (#5117)
. In this way, when a system reset is performed, the flash
The lighting device is set to automatic flash mode and automatic dimming mode.
, the irradiation range is set to auto. After completing the above operations and proceeding to $5118, the microcomputer MCF
Move the light emitting panel back and forth to achieve the set illumination range.
move it. First, the microcomputer MCF has an irradiation range that is
It is checked whether it is true or not (#5118). Irradiation range register
If the contents of the star FZR are [000J, the microcomputer MC
It is determined that F is auto, and the process proceeds to #5119. and
, as mentioned earlier, the photographic lens used (focal length
7 lashes of light covers the angle of view of Fv)
In order to move the light emitting panel, the motor control circuit MDR
Output a signal. At $51:18, the contents of register FZR are set to [0'00J or higher].
If the microcomputer MCF determines that it is outside, go to #5120.
As mentioned earlier, the signal is sent from terminal P261P27.
Output and drive motor MOFL to motor control circuit MDR
let This causes the light emitting panel to move. and,
The microcomputer MCF connects the position detection circuit zCP to the terminal P28.
The position of the light emitting panel is determined by the signal input to 1P29.
detected, and its position is the focal length indicated by the contents of register FZR.
The 7 rays of light cover the angle of view of the photographic lens, which has a distance of
When the position is reached, the microcomputer MCF connects the terminal P2Gl'P2.
A signal is output from 7 to control the motor M to the motor control circuit MDR.
Stop OFL. After setting the position of the light emitting panel, the microcomputer MCF
The focus of the photographic lens has an angle of view covered by the flash light.
Display circuit FD for point distance and auto/manual display
In order to make P do it, similarly to #5028 (Figure 30)
and set the display data FZD ($51.21)
. The microcomputer MCF then controls the maximum output of the flash device.
Store the light intensity Iv in the data FcR, #5122), #
Proceed to 5123. In #5123, the microcomputer MCF controls the camera system.
Check the lighting mode. Data CFR, 6th place Pi)C
If FR, is set, the microcomputer MCF will not emit light.
Determine that the mode is active and proceed to #5126;
If so, it is determined that the light emitting mode is in effect, and the process proceeds to #5124. At $5124, the microcontroller MCF is the main capacitor
Check the charging voltage of MC and find that current flows into terminal P23.
If the terminal P23 is “H++”, the microcontroller M
CF indicates that the charging voltage of the main capacitor MC is higher than the specified value.
It is determined that the value has been reached and proceeds to #5125.
If so, proceed to #5126. In #5125, microcomputer MC
F outputs "L++" from terminal P35 and flashes.
Allows the control circuit FCC to output the light emission start signal STA.
Allowed. On the other hand, in @51.26, the microcomputer MCF is
Output "'H" from terminal P3S and flash control circuit
Prohibits the FCC from outputting the light emission start signal STA. In addition, the step of stirring 5124 is omitted and the state of CFR35 is used.
It is also possible to decide whether or not to emit light 9 based only on the status (later).
(mentioned). Next, the microcomputer MCF detects that the flash device is connected to the camera system.
7 lights to indicate that it is working as part of the stem.
cents STF ($5127). Then, my
The converter MCF outputs “H” from the terminal P30 and outputs the boost circuit.
Activate the path DD (#5128) and execute the DISP routine (
Proceed to Figure 32). FIG. 34 is a flowchart showing the timer interrupt routine.
It is. As mentioned earlier, the microcomputer and MCF have a built-in timer.
The timer allows the timer to run for a certain period of time (even if
If the timer interrupt occurs at intervals of 250 +n5ec,
It will be done. The microcomputer MCF first adds 1 to the timer counter T.
(#5131). And set its contents and given value to
Comparatively #5], 32), if T<K, go to #5133
, if T≧, proceed to $5144. In #51.33, the microcomputer MCF has a booster circuit DD.
Check if it is working. Terminal P3゜ to I4゛
is output, the microcomputer MCF outputs the boost circuit DD.
Determine that it is operating and proceed to #5134, otherwise
If so, skip to #51.36. At $5134, the microcontroller MCF is the main capacitor
Check the charging voltage of MC. Current flows into terminal P3□
If terminal P3□ is “HII”, the microcomputer MCF
, the charging voltage of the main capacitor Me reaches a predetermined value or higher.
It is determined that the
The operation of the pressure circuit DD is stopped (#5135). $51
At 34, no current flows into terminal P3□,
If terminal P1.2 is “L”, the microcomputer MCF
is when the charging voltage of main capacitor MC reaches the specified value.
I judge that it is not, and skip it for $5,136. Proceeding to #5136, the microcomputer MCF is connected to the camera body.
Is the dimming signal FSTP issued from contact J6?
Find out whether or not. If “H” is input to terminal P13,
, the microcomputer MCF recognizes that the dimming signal FSTP has been issued.
Then proceed to #5137 and get the 5th place pi of data FCR.
) Set FCRo. At the same time, the microcomputer
MCF has terminal P2. Outputs “H” from the display F.
Turn on CC (#51.38) and proceed to #5141. On the other hand, if "L++" is input to terminal P3),
The microcomputer MCF does not emit the dimming signal FSTP.
Judging that, the 5th place pi) FCR of data FCRo is
Reset (I 51:39). Or one, my
Con MCF outputs "L11" from terminal P25.
Turn off the display F' CD (#5140), #514
Go to 1. Proceeding to #5141, the microcomputer MCF sets the timer counter.
Resent the data and start the timer. after that
, the microcontroller MCF allows timer interrupts and (
#5142), interrupt by interrupt terminals INTA and INTB
Allow I NTA, I NTB ($5.143),
Waits until one of the interrupts is issued. If T≧, the flash is installed.
The position ends the operation as part of the camera system. So
To show that, the microcomputer MCF has 7 lags.
Resent the STF (#5144). Next, my
Con MCF both outputs “J-” from terminals P241P2S.
Output and turn off display C1-ID and F9D (#51
45), (#51.46), Full display on display circuit FDP
Display date to erase. AMD, FZD, FMD, FND, I SD, FDD
Store blank display data BLD in (#5147)
, transfers the data to the display circuit FDP (#5148). Then, the microcomputer MCF indicates that the boost circuit DD is operating.
Check whether it exists or not (#5149). From terminal P30 “
When “L” is output, the microcomputer MCF connects the external pressure circuit DD.
It was determined that it was not in operation and proceeded to well 5143.
If not, proceed to #5150. #51.50 adjusts the charging voltage of the main capacitor MO.
If the charging voltage reaches the specified value, the microcomputer
M CF outputs “L” from terminal pso and connects to booster circuit DD.
Stop the operation (#5151) and proceed to #5143. On the other hand, the charging voltage of the main capacitor MC reaches a predetermined value.
If not, proceed to #5141 and the microcomputer MCF
, reset the timer counter T and start the timer.
<#5141), enable timer interrupts (#514)
2). Then, the microcomputer MCF interrupts the interrupt at #5143.
Child 1 and above, as mentioned, interrupt terminals INTA, INTB
After the interrupts INTA and INTB are applied,
Interrupts INTA and INTB are activated for a specified period of time.
If not, the entire display on the flash device will be
Only the in-capacitor MC is charged. and,
When the charging voltage of main capacitor MC reaches the specified value
For example, charging of the main capacitor MC is also stopped, and the interrupt terminal
Interruption by I NTA, I NTB I NTA, INT
Wait until B is called. [Summary] The above is an example of a camera system implementing the present invention.
Ru. Finally, let us explain the light emission mode and exposure control mode in this example.
Let's summarize the relationship with the code. Table 10 shows the light emission mode and exposure control mode in this example.
This is a table showing the relationship with the code. As mentioned in the text, even if the exposure control mode is P mode,
For example, the flash mode can vary between automatic and non-flash modes.
Switching is possible only in On the other hand, if the exposure control mode is S, A, or M
If so, the flash firing mode is forced firing and non-firing.
This is possible only in the open. However, if the flash device
, operating independently from the camera system and externally.
For example, if you use this 7 ratunyu device on a camera other than a dedicated camera.
When attached, the flash mode changes from forced flash → automatic flash →
The mode can be switched from non-emission → forced emission →...
Table 11 shows how to switch the exposure control mode in this example.
Indicates how the flash mode changes when
This is a table. When this flash device is attached to a dedicated camera, the camera
When you switch the exposure control mode on the camera body, the
Flash emission mode depending on the selected exposure control mode.
is automatically switched. For example, when the exposure control mode changes from P mode to another mode.
When switched, the flash mode changes from automatic flash to non-flash, or
, switches from non-emission to non-emission. Conversely, exposure control mode
, S, A, M glue/switch from any mode to P mode
The flash mode changes from forced flash to non-flash, or non-flash.
Switches from emitting light to not emitting light. Also, a system reset is performed.
When activated, the flash mode will always be automatically activated, regardless of the previous flash mode.
Switches to light emitting mode.

[Modification] ' [First modification 1 In this embodiment, the relationship between the exposure control mode and the light emission mode is not limited to this. It is possible to transform. In order to transform in this way, the microcomputer M described earlier must be
Control of the CB and microcomputer MCF may be changed as follows. [The microcomputer MCBI R253 (Fig. 13) is in P mode or S
mode. And #34.7. R
356 (Figure 20) is deleted. Furthermore, in FIG. 23, a step is provided next to R429 to determine whether the mode is P mode. And if it is P mode, R43
0, and if it is not P mode, S mode operation (Av=B
vc+5v-Tv) and proceed to R431. [Microcomputer MCFI #5035. #5039 (Fig. 31) is used to determine whether the mode is P mode or S mode. and,
In FIG. 33, R5105 is used to determine whether the mode is P mode or S mode. Furthermore, R510
8 is deleted, and when FMR=00 in R5106, the register FMRr01J is stored and the process proceeds to R5109. Also, in R5107, FMR=01
In this case, "00" is written to the register FMR and the process proceeds to R5109. When transformed in this way, if the exposure control mode is P mode or S mode, it will switch to automatic flash mode (or non-flash mode)
become. The camera system performs the same operation in both P and S modes in flash photography that involves flash emission, and operates in accordance with P mode or S mode in natural light photography that does not involve flash emission. Note that when the exposure control mode is A mode or M mode, it is the same as in the previous embodiment. In addition, in this modification, when the exposure control mode is A mode or M mode (when the AE port/next inch ALS is turned on, slow synchronized shooting is performed, and when the exposure control mode is P mode or S mode, the AE lock switch ALS is turned on). ON
When set, spot metering will be used. [Second Modification 1 Additionally, in the previous embodiment, if the main capacitor MC had not been fully charged, the transition to natural light photography would have been made; however, even if the main capacitor MC had not been fully charged, , flash photography may be performed. This is because, as mentioned earlier, when the camera system operates, the booster circuit DD always operates, and the main capacitor M
This is because, in most cases, charging of the main capacitor MC has been completed since charging of the main capacitor MC is being performed. To change like this, change the microcontroller MCB as follows.
, if you change the control of the microcomputer MCF, it will be more than 1° [Microcomputer MCBI #301 to #304 (Fig. 17) and #341 to #3
44 (Figure 20). In Figure 18, between R325 and R327, the main capacitor M
If the charging of C is completed, the display data FLI) will be “0”.
1" is stored in the data FLD1, and if charging of the main capacitor MC is not completed, a step of storing "00" in the data FLD1 is provided. Furthermore, in FIG. 23, the process is changed to proceed from R427 to R436. Also, data CFR3
The seventh bit DFR36(F I) IS) is reset when flash photography is performed, and set when natural light photography is performed. [Microcomputer MCFI In Figure 32, R5053 is the main capacitor MC
If charging is not completed, R5067, $50
68 to proceed to R5056. Then, if CFR,6=1 in stirring 5052, the display CH
After turning off the charging completion display by D @ 50'69
Let's move on to. By changing in this way, the main capacitor Me
No more waiting time for charging. Furthermore, during flash photography, the interlocking range, film sensitivity, and aperture value of the flash device are displayed regardless of whether or not the main capacitor MC has been fully charged. When shooting with natural light, no such display is made regardless of whether or not the main capacitor MC has been fully charged.Furthermore, even when the main capacitor MC has been fully charged, the display CHD indicates that the charging is complete. No display is performed. [Third Modification] In the embodiment or modification described above, if the exposure control mode is P mode (also S mode in the second modification), slow synchronized photography is not performed, but the AE lock switch ALS When A and E locks are activated, slow synchronized photography can be performed regardless of the exposure control mode as long as the flash device is in the emission mode.To do this, the microcontroller M
The control of CB may be changed as follows. [Microcomputer MCBI #22B (Fig. 13) is used to determine whether or not it is in non-emission mode. And if it is in non-emission mode, #259
and if it is not in non-emission mode, that is,
If the forced light emission mode is the automatic light emission mode, the process proceeds to #230. When transformed in this way, at #251 (Fig. 13), the microcomputer MCB locks the AE lock switch A.
If it is determined that AE lock is achieved by LS, the process shifts to #252 slow synchro photography regardless of the exposure control mode. [Fourth Modification] In the previous embodiment, the selection of the light emission mode was performed within the flash device, but the operation itself in accordance with the light emission mode was controlled by the microcomputer MCB within the camera body. However, it is also possible that the microcomputer MCF in the flash device determines the light emission mode and performs control according to the light emission mode. Specifically, the control of the microcomputer MCB and microcomputer MCF is changed as follows. [Microcomputer MCB] Delete #329 of the α calculation routine (Fig. 18). [Microcomputer MCF] In FIG. 33, before step 5123, a step is provided to determine whether or not the mode is a non-emission mode. And if the emission mode is non-emission mode, #5126
Let's move on to. If the light emission mode is not the non-light emission mode, it is determined whether the light emission mode is the forced light emission mode. As a result of the determination, if the light emission mode is the forced light emission mode, the process proceeds to #5124. If the flash mode is neither non-flash mode nor forced flash mode, that is, if the flash mode is automatic flash mode, $512
Proceed to step 3. [Fifth Modification 1 Furthermore, in the previous embodiment, when determining the brightness Bvs of the main subject, the photometric data Bv is determined according to the imaging magnification β. Although the necessary photometric data is selected from ~BV5, the photometric data may be selected according to the main zone and the proximity zone. Specifically, in FIG. 13, #230 to #243 are changed as follows, for example. First, it is determined which zone is the main zone. No. O
If the zone is the main zone, it is determined whether the first and second zones are adjacent zones. Furthermore, if the first (2) zone is the main zone, it is determined whether or not the 0th zone is the adjacent zone. If the first (2) zone is the main zone and the Oth zone is the proximity zone, it is further determined whether the second (1) zone is the proximity zone. If the 0th//-th zone is the main zone and the 1st and 2nd zones are both proximity zones, the brightness Bvs of the main subject is determined from the five photometric data Bvo to Bv4. Then, if the focal length of the photographic lens is longer than a predetermined focal length (for example, 50 mm), the photometric data Bvo-B
The brightness Bv of the main subject is a weighted average with a larger weight of v2.
Find s. Furthermore, if the focal length of the photographing lens is shorter than a predetermined focal length, the brightness Bvs of the main subject is determined by a weighted average of the photometric data BVO with increased weight. If the O-th zone is the main zone and only the first (2) zone is the proximity zone, the brightness Bvs of the main subject is determined from the two photometric data Bv,, Bv, (Bv,). At this time, the brightness Bvs of the main subject is determined by a weighted average of the photometric data Bvo with increased weight. . The O-th zone is the main scene, and if there is no proximity zone, one photometric data Bvo is taken as the brightness Bvs of the main subject. The first (2) zone is the main zone, and the 0.2 ('1)
If the zone is a proximity zone, three photometric data B V
The brightness Bvs of the main subject is determined from OI B v + HB V 2. At this time, the brightness Bvs of the main subject is determined by a weighted average of the photometric zones Bv, ('Bv2) with increased weights. If the first (2) zone is the main zone and only the O-th zone is the proximity zone (the second (1) zone is not the proximity zone), then the two photometric data B+o, Bv, (Bv2
), calculate the brightness Bvs of the main subject. At this time, the brightness Bvs of the main subject is determined by a weighted average of the photometric data Bv1 (Bv2) with increased weight. If the first (2) zone is the main zone and there is no proximity zone, the photometric data Bv1 (Bv2) is used as the main subject's brightness B.
vs. With this modification, the main subject can be reliably set appropriately without determining the photographing magnification β. [M6 Modification Example 1 In the previous embodiment, the microcomputer MCB also used the determination of whether or not a flash device is attached to determine the light emission mode, etc., but as described below, if the flash device is attached A flag indicating whether or not the FON
F) is set up, and with that flag, the microcomputer MC
Alternatively, it may be determined whether the flash device is attached or not. Specifically, in the AE screen (Fig. 5), after inputting the 7 run data sent from the 7 run unit (#22), the microcomputer MCB inputs the data FCRo.
Check the state of the 4th bit FC195 of
If R,,3 is set, it sets the 7-lag FONF, otherwise it resets the 7-lag FONF. After outputting the display data, the microcomputer MCB outputs the display data (
#26>, check the status of 7-lag FONF, and check the status of 7-lag FON
If F has been reset, it skips to well 28, sets 7 lag FONF, and goes to #27 to output 7 lags. Similarly, in the ST'O'P routine (Figure 8), 7
After inputting the flash data (#91), the microcomputer MCB inputs the fourth bit FCRO3 of the data FCRo.
Check that pin) 'F' If CRo3 is set, set 7 lag FONF, otherwise set 7 lag F
Reset ONF. After outputting the display data (#106), the microcomputer M'C'B outputs the 7-lag FO
The state of NF is checked, and if the 7-lag FONF has not been reset or reset, skip to #107, and if the 7-lag FONF is set, go to #106 to output flash data. Further, the subroutine "exposure calculation" (FIG. 13) is changed as follows. If 7 lag BLAF is set in company 227, the microcomputer MCB will set 7 lag FONF.
If the 7-lag FONF has been reset, the process proceeds to @25'9 (subroutine "spot photometry"); if the 7-lag FONF has been set, the process proceeds to #228 to check the light emission mode. Similarly, if the 7-lag BLAF calibration has been reset in #251, the microcomputer MCB checks the state of the 7-lag FONF, and if the 7-lag FONF has been reset, the microcomputer MCB checks the state of the 7-lag FONF, and if the 7-lag FONF has been reset,
Proceed to 56 (subroutine "Natural Light") and set 7 lag FON
If F has been cented, proceed to #253. In addition, in "Subroutine 1 - System Reset" (Fig. 25), "Mode Change" (Fig. 26), and "Data Change" (Fig. 27), even immediately before outputting flash data, the microcomputer The MCB does not check the state of the 7-lag FONF. This is due to the following reasons. When the camera system is stopped, switch SR3, MO
When S, US, and DS are operated and an interrupt INT is applied, the 7-lag FONF is reset regardless of whether or not a flash device is installed (STOP routine (see #108 in Figure 8)). ). Therefore, in the subroutine "system reset" etc., similarly to AE screen (Fig. 5) #26 to #27, when the microcomputer MCB determines the state of the 7-lag F'ONF and the flag FONF is set, If only 7 flash data is output, the interrupt INTo will be applied while the camera system is stopped, and when the subroutines "System Reset", "Mode Change", and "Data Change" are executed, the flash device will be output. This is because even though the flash is attached, the flash attachment is not reset or the mode is changed. [Modification 71 Next, a modification of the photometric pattern will be described. FIG. 36(a) is a diagram showing a first modification of the photometric pattern. This photometry pattern is based on the CCD line sensor l5.
The photometry area was determined with the position of Lo-ISL2 in mind. That is, the region 1a is a rectangular region including a region (O-th zone) where the CCD line sensor l5Lo is located in the center. Region 2a is a rectangular region including a region (first zone) in which the CCD line sensor ISL is located in the center, and the photometric area is almost the same as that of region 1. The region 3a is a rectangular region including a region (second zone) in the center where the CCD line sensor l5L2 is located, and has almost the same photometric area as the region 1. Regions 4a and 5a are regions 1a and 2a. 3a, and area 4a is located so as to surround area 1a,
The upper part of 2 at 3 a, region 5a, is the upper part of region 1 a,
They are located at the bottom of 2a and 3a, respectively. When the photometry pattern is shaped like this, it becomes possible to accurately spot photometer the object in the main zone (that is, the main object). FIG. 36 (1) is a diagram showing a second modification of the photometric pattern. This photometric pattern incorporates the advantages of the photometric pattern shown in FIG. 2 and the photometric pattern of the first modification. That is, the area 1b is the photometric area LM
It is located in the center of R and has a circular shape. Regions 2b and 3b are located on the left and right sides of region 11), respectively, and have a fan shape. The photometric areas of regions 2b and 3b are almost the same as that of region 11+. Area 4
1) The top and 5b are located so as to wrap around the areas 1-1), 21+, and 3b, and the area 41) is located around the areas 1b and 2b.
, 3b, region 5b has regions 1 b, 2 b,
It is located at the bottom of 3b. And area 1 b...
, 211.311. 'l b, 5 b combined,
Areas 1, 2, 3, . . . in the photometric pattern shown in FIG.
It has the same shape and size as the combined area of 4.5. When the metering pattern is shaped like this, if the main subject is located slightly to the left (right) of the center of the screen FLM,
Compared to the photometric pattern shown in Figure 2, the first zone (second zone)
This reduces the influence of light incident on the upper and lower parts of the zone), making it possible to more accurately measure the brightness of the main subject. FIG. 36(c) is a diagram showing a third modification of the photometric pattern. In this modification, regions 4 and 5 of the photometric pattern shown in FIG. 2 are arranged on the left and right sides. In other words, the area 4c has a C-shape located on the left side of the photometric area 2c, and the area 5c has a C-shape located on the right side of the photometric area 3c. When the photometry pattern is shaped like this, fine-grained photometry corresponding to the size of the subject image becomes possible, regardless of whether the main zone is one of the O-th to second zones. Figure 36(d)! FIG. 7 is a diagram showing a fourth modification of the photometric pattern. This modification includes region 4c of the third modification,
This is a photometry pattern with the top and bottom of 5c removed. When the photometry pattern is shaped like this, as in the third modification, fine-grained photometry corresponding to the size of the subject image can be achieved no matter where the main zone is from the 0th to the 2nd/-th zone. It becomes possible. In addition, since the photometric area of the region 6d is larger than that of other photometric patterns, the sensitivity to background light is increased. In the above embodiments and modifications, no other photometric area exists between the second iH light area and the third photometric area, but there is another second photometric area or another photometric area between them. Three photometric areas may be provided. In addition, a conventionally known means of determining the photographing position (
For example, a mercury switch, etc.) may be provided to determine whether the photograph is taken in a horizontal or vertical position, and the method of calculating the main subject brightness and background brightness may be changed depending on whether the photograph is taken in a horizontal or vertical position. . Specifically, for example, when using the photometry pattern shown in Fig. 2 or the photometry patterns shown in Figs. The luminance of the background is determined by making the weight of the photometric values of 4, 4a, and 4b smaller than the weight of the photometric values of the lower photometric areas 5, 5a, and 5b. This makes it possible to reduce the influence of the upper photometric region where bright sky is likely to be located. When shooting in a vertical position, the luminance of the background is determined by giving the same weight to the photometric values of the photometric areas 4, 4a, 4b and the photometric values of the photometric areas 5, 5a, 5b. Furthermore, in the case of vertical position photography, the photography magnification β is a predetermined photography magnification β. , β for β1. If β β β1,
In vertical shooting, the weight of the photometric value of the left photometric area 2°2a, 2'b, which is usually above, is
The right metering area, which is usually at the bottom 3. 'The brightness of the main subject is determined by using a weight smaller than the weight of the photometric values of 3a and 3b. Similarly, when using the photometry patterns shown in FIGS. 36(C) and (cl), for horizontal shooting, the photometry values of the left photometry areas 2c, 4c, 2d, and '4d are as follows. The luminance of the main subject and the luminance of the background are determined by weighting the photometric values of the right photometric areas 3c+5'c, 3'd, and 5d by the same -l. When photographing in a vertical position, the photographing magnification β is set to a predetermined photographing magnification β1. For β2, if β1 < β2, then the left photometry area 4 e, which is usually the upper part in vertical shooting
, 4 d is set to be smaller than the weight of the right photometric areas 5'c and 5 d, which are normally lower in vertical position photography, to determine the brightness of the background. Further, the photographing magnification β is a predetermined photographing magnification β1, β. Against, β. If β is β1, the main subject brightness is determined by reducing the weight of photometry areas 2c and 2d, and
The background brightness is determined by reducing the weight of d. Further, the imaging magnification β is a predetermined imaging magnification β. For, β
Ku β. If so, the weight of the photometric values only for photometric areas 4 c, 4 d, or photometric areas 2 c, 4 c,
The weights of 2d and 4d are reduced, and the brightness of the main subject and the brightness of the background are determined. In addition, when shooting in a vertical position, a means is provided to detect whether the left or right side of the camera is on top, and the brightness of the subject is determined by reducing the weight of the photometric value in the photometry area of the top side. Good too. Table 1 - 2o4 - Table 2 Table 3 Table 4-1 Table 4-2 Table 5 SYS・・・・・・・・・・FDIS will be sent only at system reset/method. ...FNS that is set when prohibiting the display of the 7 lash device ....................... 7 FMR that is set when prohibiting the rash light emission...・Light emission mode RDY・・・・・・・・・OK is set when charging is completed・FON is set when 1 dynamic dimming is performed.・・・・・・・・・7
This is set when the power of the lash device is turned on.
Table [: Bvs calculation ■ I[: Bvs calculation ■ IV: Bvs calculation ■ Table 7 Table 8 Table 9 Table i Near: When the subject in the i-th zone is close to the main subject (i = 0.1 .2) Look at Table 10, Table 11, Table 12, and Table 13! Table 1 As explained above, the multi-segment photometry device of the present invention has the above configuration, so if this device is used, the position of the main subject in the field and the image of the main subject can be displayed on the shooting screen. No matter how the amount of light and weight it occupies changes, the main subject can be accurately identified and the main subject can be accurately photometered. At the same time, by using the multi-segment photometry device of the present invention, it is possible to accurately measure the background brightness, so it is possible to grasp the situation of the brightness distribution of the subject and obtain accurate exposure. become.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a camera system implementing the present invention. FIG. 2 is a diagram showing a photometry range and a focus adjustment state detection area in a camera system implementing the present invention. FIG. 3 is a circuit diagram of a flash device used in a camera system embodying the present invention. 4 to 29 show a camera system implementing the present invention,
3 is a flowchart showing control of a microcomputer provided within the camera body. FIGS. 30 to 34 are 70-charts showing control of a microcomputer provided in a flash device in a camera system implementing the present invention. FIG. 35 is a diagram showing photographing conditions in automatic flash mode in a camera system embodying the present invention. FIG. 36 is a diagram showing a modification of the photometry area in the camera system implementing the present invention. I SLo, I SL,, I SL2 Focus detection target area 1.1a-1d, '2.2'a-2dt3, 3a-3d
First photometric area PD,, PD,, PD 2 First photometric area 4.4g-4'd, 5t5a-5d Second photometric area PD,, PD4 Second photometric area Third photometric area D 5 Third Applicant for photometric means: Minolta Camera Co., Ltd. Figure 35 F3vh F5vsα) Taste Q;

Claims (1)

[Scope of Claims] 1. A plurality of first photometric means for obtaining luminance information of a plurality of first photometric areas corresponding to each of a plurality of focus detection target areas, and a second photometric unit located around the first photometric area. A multi-segment photometry device comprising: a second photometry device that obtains luminance information of a region; and a third photometry device that obtains luminance information of a third photometry region located outside the second photometry region.