JPS6254239A - Display device for exposure meter - Google Patents

Abstract

PURPOSE:To display respective types of data without enlarging the area of a displaying part by displaying, in a frequency distribution way the photometry data stored for the manual operation with a relative scale on displaying means of two-dimensional coordinates as a deviation quantity for the exposure control data of an output means, and displaying photometry data at a position different from the frequency distribution on the relative scale while photometry is executed presently. CONSTITUTION:The photometry data stored for the manual operation are displayed in a frequency distribution way on the displaying means of the two-dimensional coordinates as the deviation quantity to the exposure control data by the relative scale. For such a reason, the distribution of respective photometry data can be displayed at the scale comparatively narrower than when the data are displayed by the absolute scale of the luminance. The photometry data while the photometry is presently executed are displayed at the position different from the frequency distribution to the relative scale. Consequently, the relation of the data during the photometry and the stored data distribution can be also easily confirmed visually.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a so-called multi-point photometry exposure meter that measures and stores the brightness of an arbitrary object portion each time a manual operation is performed.
Particularly related to display devices that display stored photometric data 6''& 1 The operation of spot metering a desired part of the subject is repeated multiple times and each photometric data is memorized, and each stored value for manually set exposure control data is Japanese Patent Application Laid-Open No. 55-127542 has proposed a display device that displays the deviation amount of corresponding data one-dimensionally on a relative scale with reference to manually set control data.

When trying to calculate ym, q However, since this display device is a one-dimensional display, although the width between the maximum and minimum values of the deviation amount can be seen, when there are multiple identical photometric values, the deviation amount for that photometric value were overlapped, resulting in only one display, and the frequency distribution of all photometric values could not be understood at all. Furthermore, since the photometric data currently being measured and the memorized photometric data are displayed together in the same area, it is difficult to understand the relationship between the data currently being measured and the memorized data distribution. Note that JP-A-53-35531 proposes displaying the frequency distribution of each photometric value on the absolute scale of the subject brightness using a two-dimensional display device, but the width of the scale is only required to be the width of the photometric range. The display area was large and was not practical.

The present invention aims to provide a display device for multi-point photometry that can eliminate the above-mentioned disadvantages.

The present invention provides a storage means for storing photometric data corresponding to the brightness of a given subject part each time a manual operation is performed, and a storage means for storing photometric data corresponding to the brightness of an arbitrary object part, and a storage means for storing photometric data corresponding to the brightness of an arbitrary subject part, and a storage means for storing photometric data corresponding to the brightness of an arbitrary subject part, and a storage means for storing photometric data corresponding to the brightness of an arbitrary subject part, and An output means for outputting exposure control data, a calculation means for calculating the deviation amount of data according to each stored value with respect to the exposure control data, a means for displaying two-dimensional coordinates, and a means for displaying the exposure control data of the output means. Each deviation amount is displayed in a frequency distribution on a relative scale based on this position in correspondence with a specific position on the coordinate axis of The present invention is characterized by comprising a display driving means for driving the display.

The photometric data stored for each manual operation is displayed as a deviation amount from the exposure control data of the output means on a two-dimensional coordinate display means on a relative scale in a frequency distribution manner, and
The photometric data currently being measured is displayed at a position on the relative scale that is different from this frequency distribution.

FIG. 1 is a block diagram showing the entire camera system to which this invention is applied. The part (BD) surrounded by a broken line is the camera body, and it is electrically connected to the camera body (BD) from the terminal (T1).
(BCKC), which is connected via (T,), has data imprint function, interval shooting function, camera body (
This circuit has arithmetic function for exposure control of BD).This circuit is installed on the back cover of the camera, and from now on, this circuit (BCKC)
) is called the back circuit. Also, this buck circuit (BCKC
) is called the camera back (BCK).

This back (BCK) is replaceable and detachable from the camera body (BD), and the camera body has a back cover that is equipped with a circuit that only has data imprinting function and interval shooting function, and It is also possible to attach a 1&lid not provided with a circuit having the function of 1&lid in place of this bag (B CK ).

The configuration and function of this back (BCK) and the back circuit (BCKC) will be described later.

Switch (S4) and terminal (Too) of camera body (BD)
) is a motor drive device (hereinafter simply referred to as the motor drive), and when the exposure control operation is completed and the switch (S, ) is turned “ON”, the motor drive (MDR) ) starts rotating, and a mechanical interlocking mechanism winds the film and charges the exposure control mechanism. When charging is completed and the switch (S,) is turned "OFF", the motor in the motor drive (MDR) stops rotating.

This motor drive (MDR) is attached to the bottom of the camera body via a coupling mechanism, and when this motor drive is not attached, charging of the exposure control mechanism and film winding are performed by a manual winding lever. Note that this motor drive (MDR) is attached to the camera body (B
D) may be provided.

Camera body (BD) and terminal (T ++), (T + □)
, (TI3) is a data output circuit provided within the interchangeable lens. This circuit (
LEC) is electrically connected by attaching an interchangeable lens to the camera body. Then, connect the camera body terminal (C
3L) becomes "LoI11", it enters the operating state and sequentially outputs various data unique to the interchangeable lens in series based on the reading clock pulse from the camera body (BD). This data includes data for confirming attachment of an interchangeable lens, open aperture value data, maximum aperture value data, focal length data, characteristic data for automatic focus adjustment, and the like. The details and data of this circuit are described in, for example, Japanese Patent Application Laid-Open No. 59-84228 and Japanese Patent Application Laid-open No. 59-140408, and will therefore be omitted.

(MET) is an external exposure meter (hereinafter referred to as meter). Camera body (BD) and terminal (T I4), (T
1S).

The circuit (RFC) connected at (T16) is a receiver that receives the infrared light signal sent from the meter (MET). Further, the circuit (FL) connected to the receiver (RFC) and the terminals (T, 7), (T1.), (TI,) is a flash device. The receiver (RFC) is attached to the hot shoe of the camera body (BD), and the 7 lash device (PL) is attached to the hot shoe provided on the receiver (RFC), as shown in Figure 1. It becomes connected.

Note that only the receiver (RFC) or only the flash device (FL) may be attached to the hot shoe of the camera body (BD). Furthermore, the terminal (T
I4), (T, 5), and (T I6) are provided in other parts of the camera body (BD) other than the hot shoe, such as the bottom of the camera. ) and the receiver (RFC) may be directly attached, and the other of the flash device (FL) and receiver (RFC) may be attached to the other part via an adapter.

The meter (MET) can be used as an incident light type or reflected light type exposure meter, and can also be used for measuring ambient light,
It is also possible to measure flash light. Then, exposure control data is calculated based on the measured value, and this data is emitted as serial light data by the infrared light projection means.

In addition to this, the emitted data includes data indicating whether the flash device (FL) is to emit test light and whether or not control data is being sent from the meter (MET). Data from infrared light sent from the meter (MET) is sent to the receiver (RFC).
is read and latched as an electrical signal.

Next, the signal lines (S T , ), (S T 2), (
The functions of the flash device (FL) and receiver (RFC) related to ST3) will be explained together with the functions of the camera body (BD). First, the signal line (ST,) is a line for transmitting a light emission start signal, and when the X contact (SX) in the camera body (BD) is closed when the front curtain (IC) has completed traveling, the 7 lash device (FL) starts emitting light.

Also, when the receiver (RFC) receives a test emission signal from the meter (MET), the receiver (RFC)
pulls this terminal (ST, ) down to Lou+'' to start the 7 lash device's light emission.The signal line (ST2) is for data transmission from the camera body (BD) to the 7 lash device (FL), and the flash device (FL). ), receiver (RF
It is a bidirectional serial data bus for data transmission from C) to the camera body (BD). Furthermore, a signal indicating that the X contact (SX) is closed and the flash device (FL) has started emitting light is sent from the flash device (FL) to the camera body (BD).
) has the function of transmitting information.

The signal line (ST3) has a mode in which data is input from the flash device (FL) and receiver (RFC) to the camera body (BD), and a mode in which data is output from the camera body (BD) to the 7 lash device (FL). This is a line that transmits the mode in which the camera body (BD) starts exposure control operation from the camera body (BD) to the 7 lash device (FL) and the receiver (RFC) using pulses of different time widths. Furthermore, it has a function to transmit synchronization clock pulses for data exchange from the camera body (BD) to the 7 lash device (FJ) and receiver (RFC), and furthermore, it has a function to transmit the light emission stop signal of the flash device (FL) to the camera. Main body (BD
) to the 7 lash device (FL).

In the camera body (BD), the microcomputer (
When the BMC (hereinafter referred to as the microcomputer) sets the line (C3F) to Lou+'', the interface circuit (IF) becomes ready to exchange data.Then, the camera body (
When the BD) inputs data, the microcontroller (BMC)
) outputs a pulse during the first time to the signal line (FMO), this pulse signal is input to the flash unit (FL) and the receiver (RFC) via the signal line (STY), and each of them is a data output. mode. When a clock pulse for reading data is output from the terminal (SCK) of the microcomputer (BMC), it is output to the signal line (Sr1) via the interface circuit (IF).

First, the flash device (FL) outputs 1 byte of data to the signal line (S '!' 2), and this data is sent to the data input terminal (SIN) of the microcontroller (BMC) via the interface circuit (IF). ). This data includes a signal indicating whether the 7 flash device is exclusive to this system, a signal indicating whether the charging voltage of the main capacitor exceeds a predetermined value, a signal indicating whether the flash device is automatically dimmed, etc. be. The 2nd, 3rd and 4th bytes are the receiver (
RFC), and this data is also output from the microcontroller (BMC).
) data input terminal (SIN). The second byte of data is a signal indicating whether exposure control data is being sent from the meter (MET), a test light emission signal, etc. The third byte is exposure time data from the meter (MET), and the fourth byte is print value data. When the above data input is completed, the signal line (C8F) goes “High.”
”, flash device (FL), receiver (RF
Data exchange with C) will no longer take place.

When transmitting data from the main unit (BD) to the 7 lash device (FL), set the signal line (C3F) to “Low”.
” and outputs a pulse during the second time to the signal line (FMO).Then, the 7 lash device (FL) enters the data input mode, and based on the synchronization clock pulse from the camera body (BD), the microcontroller (BMC) ) reads the 3-byte data from the data output terminal (S OU ).The 1st byte of this 3-byte data is the control pulse value (A
v) and exposure control mode, the second byte is the sum of film sensitivity and exposure compensation data (Sv + Cv), 3
The bite is the focal length (fv) of the interchangeable lens. The data in the 1st and 2nd bytes are used to calculate and display the shooting distance range in which proper exposure is compensated by flash emission, and the data in the 3rd byte is used to calculate and display the shooting distance range that compensates for proper exposure by firing the flash. This data is used to adapt to the shooting angle of view.

When the camera body (BD) starts exposure control operation,
The signal line (C8F) is set to Low'' and a pulse during the third period is output to the signal line (FMO).Then, this pulse is output to the signal line (FMO) by the 7 lash device (FL).
Sr1), and the flash device (FL) enters the light emission mode for exposure control. Then, when the actual exposure control operation starts, a "Low" pulse is output to the signal line (RL) and the interface circuit (IF)
A signal line (
Data from Sr1) is given via the signal line (FST), and a signal input from the circuit (FLM) via the line (FSP) is output to the signal line (Sr1). The signal line (Sr1) outputs a "Low" signal until the flash device (FL) starts emitting light, and changes to "High" when the flash device (FL) starts emitting light.The light emission amount control circuit ( FLM) is equipped with a light-receiving element that receives the subject light that passes through the photographic optical system and is reflected from the film surface, and the signal line (Sr1), (FST
) changes from "High" to "LoIU", integration of the output current of this light receiving element starts. Then, when the integral value reaches a value corresponding to the analog signal at the data output terminal Cv based on the film sensitivity (Sv) and exposure compensation amount (Cv) input from the A-D, DA converter circuit (ADA), Outputs a "High" pulse to the signal line (FSP).

This pulse is input to the flash device (FL) via the signal line (Sr1) and flash emission is stopped.

Furthermore, when a pulse is input from the signal line (Sr1) for data exchange, the flash device (FL) can perform a voltage boosting operation for a certain period of time (for example, 15 minutes) from the moment the pulse is input.

Therefore, every time data is exchanged with the camera body (BD), a voltage boosting operation is performed for a certain period of time from that point onwards.

When using this function for interval shooting with flash photography, a signal to start the camera body (BD) is input from the back circuit (BCKC) a certain period of time (for example, 1 minute) before the start of shooting. When the camera main body (BD) is started, data is exchanged with the 7 lash device (FL), and a boosting operation is performed. Therefore,
Even in interval photography using flash photography having intervals of 15 minutes or more, the main capacitor of the 7 lash device (FL) is fully charged before photography.

Meter (MET), receiver (RFC), flash device (FL), interface circuit (IF)
A specific example of the flash light emission amount control circuit (FLM) is described in, for example, Japanese Patent Application No. 59-201381, so a description thereof will be omitted. In addition, a flash device (FL), an interface circuit (IF), a 7-lash light emission control circuit (FLM)
Specific examples of this are shown in Japanese Patent Application Laid-open No. 59-231520 and Japanese Patent Application No. 59-48435 in addition to those mentioned above.

Next, the inside of the camera body (BD) surrounded by broken lines will be explained. (BMC) is a microcomputer, and its operation is shown in the 70-chart in FIGS. 2 and 3.

(BA) is a power supply battery, and a photometry circuit (FLM) is connected directly from this battery (BA') via a power supply line (10E).

(AM), and the circuits other than the AD/DA conversion circuit (ADA) are supplied with power. The transistor (BT) is turned on by the signal from the output capo (OP, ) of the microcomputer (BMC).
”, “OFF” is controlled, and the transistor (BT) is “O”.
N”, the photometry circuit (FL) is connected via the power line (10V)
M), (AMM), A-D/D-A conversion circuit (A D
A) Power is supplied to the lens circuit (LEC). (
D S P ) is a display circuit that displays the photometry mode, exposure control mode, exposure time for control, numerical values for control, film sensitivity, exposure compensation amount, and the status of the flash device.

Also, when the exposure time and fringe value are not linked to the control,
A warning is displayed by flashing the exposure time and aperture value at the control limit. This display circuit (DSP) receives clock pulses from the data output terminal (SOU) of the microcomputer (BMC) to the terminal (SCK) when the signal line (C8D) is "Loud". It reads serial data sent synchronously and displays based on this data.

(AMM) is a photometry circuit for ambient light, and has a light receiving element for partial photometry and average photometry.
) can be switched by “High” or “Low”. This photometry circuit (AMM) outputs a voltage signal obtained by logarithmically compressing the output current of the light receiving element.

When the “Loud” pulse is output to the signal line (ADSTA), the A-D, D-A conversion circuit (A D A ) converts the output of the photometry circuit (AMM) from the terminal (CKOUT) of the microcontroller (BMC). A- based on the clock pulse of
D-convert. Also, the signal line (C8A) is “LOLI”.
When (ADMO) is “High” at I”, the terminal (S
The A-D converted data is sent to the data input terminal (SIN) of the microcontroller (BMC) in synchronization with the clock pulse from the
), and the signal line (C8A) is “LoIIl” (
ADMO) is "Lou+", the data is read from the aforementioned data input terminal Cv from the output terminal (SOU), and this data is converted to -A and sent to the light emission control circuit (FL).
M). Note that the signal line (C8A) is “Hi”
No data is exchanged with the input (BMC). (G,) is a date circuit, which becomes active when the signal line (CSL) becomes "Loud" ) data can be transferred from the lens circuit (LEC) to the lens circuit (LEC).

(AFC) is an automatic focus adjustment circuit, and the signal line (
When A F E N ) becomes "Lou+", it becomes an operating state, and when it becomes "High!+", the operation stops. Also,
When the signal line (CS A F ) is "Lou+", automatic focus adjustment data from the microcomputer (BMC) is read.

A specific example of this automatic focus adjustment circuit (AFC) is shown in, for example, Japanese Unexamined Patent Application Publication No. 140408/1983, so the details will be omitted.

(APG) is means for outputting a pulse in response to the movement of the aperture member of the aperture, and this pulse is input to a terminal (CKIN) of a microcomputer (BMC).

The pulse input to this terminal (CKIN) is
Based on this pulse, the data is input to the event counter in the MC and is subtracted from the preset data of the number of refinement stages. Then, when the content of the counter reaches "0", it means that the filter has been filtered by the planned number of stages of filtering, a counter interrupt is generated, a pulse to stop filtering is output from the output capo (OPI2), and the filtering operation is started. Stop.

(MGD) is a magnet circuit, and the signal line (R
When a pulse of "Lou+" is output to the signal line (AP), the release magnet operates, and the aperture operation and mirror up operation begin. When a pulse of "Lou+" is output to the signal line (AP), the aperture magnet operates, The narrowing down operation stops. When the “Lou+” pulse is output to the signal line (IC), the leading curtain lock release magnet operates and the leading curtain starts running. The “LotoH” pulse is output to the signal line (2C). When the signal is output, the trailing curtain lock release magnet operates and the trailing curtain starts running.

(G2) is a date circuit, and the signal line (C3B) is “L”
ou+”, it becomes active and the buck circuit (BCK
Data can be exchanged between C) and the microcomputer (BMC). The signal line (C8B) has the function of starting the back circuit (BCKC), and when the camera body (BD) becomes operational and attempts to exchange data with the back circuit (BCKC), the back circuit (BCKC) also becomes operational. becomes. Furthermore, the signal line (C3B) is connected to the back circuit (BCKC).
In order to prevent film winding during data imprinting, a "Low" pulse is output when the trailing curtain starts running. When the back circuit (BCKC) receives this pulse, it stops the imprinting operation at a time corresponding to the film sensitivity data sent from the camera body (BD). When the signal line (BIO) is High, the camera body (BD)
to the back circuit (B CK C) and
ow”, data is sent from the back circuit (BCKC) to the main unit (BD).

A pulse for data imprinting is output to the signal line (IP). This pulse is output from the time when the exposure control operation starts, and has a time width corresponding to the film sensitivity.

The switch (Sl) is a photometry switch that is closed when the release button is depressed in the first step, and starts photometry calculation operation. Further, a signal line (BSI) is input from the back circuit (BCKC) in parallel with this switch (S,), so that the microcomputer (BMC) can also be started from the back circuit (BCKC). Buck circuit (BCKC)
The start signal is input through the signal line (BSI) from the back circuit (BCKC) when the back circuit (BCKC) is operated and the back circuit (BCKC) operates, and when the shooting operation starts during interval shooting as described above. There are two types: a case where the camera body is started to start boosting the pressure of the 7 lash device (FL) one minute before the start of the 7-lash device (FL);

The switch (S2) is a release switch that is closed by the second step of pressing down the release button.
) is closed, the exposure control operation is activated. In addition, a signal line (B S 2) from the back circuit (BCKC) is connected in parallel with this switch (S2), and the signal line (B S 2) from the back circuit (BcKe) can be used to perform interval shooting and shift the exposure value by a constant value for proper exposure. , when taking a predetermined number of shots (hereinafter referred to as bracket shooting), the camera body (
A signal for starting a photographing operation is transmitted to the BD. Furthermore, when a predetermined number of frames (hereinafter referred to as the number of frames) have been captured during bracket shooting, even if the release switch (S2) of the camera body (BD) is "ON", the back circuit (back circuit) controls the transition to exposure control operation. B.C.C.C.
) side, and the camera body (BD
) When the release switch (S2) is turned "OFF", it becomes possible to proceed to the next bracket photographing. Therefore, the back circuit (BCKC) monitors the state of the release switch (S2) on the camera body (BD) and makes sure that the release switch (S2) is turned "ON" after shooting the set number of frames by bracket shooting. For example, data that prohibits transition to exposure control operation is stored in the back circuit (BCK).
C) to the camera body (BD).

In addition, during interval shooting, the back circuit (BCK
In C), it is possible to set the shooting start time, the number of frames, and at what time interval and how many times (hereinafter referred to as the number of groups) to carry out shooting for this number of frames. Then, at the start time, the bank circuit (BCKC) outputs a "Loud" signal to the signal line (BS2) to perform the exposure control operation until the number of frames have been photographed. When the photographing of one group is completed, the signal line (BS2) is set to "High", the time for the set time interval is counted, and the remaining time is displayed. When the remaining time reaches 0 seconds, the signal line (B
S2) is set to "Lou+" and the number of frames is photographed. When the second operation is completed, the set interval photographing mode is canceled. In addition, the back circuit (
Even if the camera (BCKC) is operating in interval shooting mode, the release switch (S2) on the camera body (BD)
) is closed, the set start time and time interval are ignored and the photographing operation is performed. In other words, the release switch (S2) is set to "O" even if the start time has not been reached.
When the shooting operation starts with “N”, the back circuit (BCKC)
The signal line (
BS2) is set to “Loud”. Further, the same operation is performed when the release switch (S2) is closed before the set time interval has elapsed. The number of photographing operations performed by the camera body (BI) is determined by counting the number of input pulses for data imprinting from the signal line (IP).

A switch (SMO) on the camera body (BD) is a switch for switching the exposure control mode.

The mode changes each time this switch (SMO) goes from "OFF" to "ON".The camera's exposure control modes are program automatic exposure control mode (P mode), exposure time priority aperture automatic exposure control mode (S mode). ), aperture priority exposure time automatic exposure control mode (A mode), and manual exposure control mode (M mode).
It changes in the order of M-3→P...

The switch (SIS) is a switch for setting the film sensitivity, and each time this switch (SIS) changes from "OFF" to "ON", the film sensitivity changes in steps of i/3Ev until the upper limit is reached. After that, when the switch (SIS) changes from "OFF" to "ON", it changes to the lower limit value, and when the switch changes from "OFF" to "ON" again, it increases again.

(SOR) is a switch that sets the exposure compensation amount, and each time this switch (SOR) changes from "OFF" to "CN", it changes from 0 → 1/2 → 1 → 11/2 → 2 → 21/2 → 3 →３
1/2→4→-4→-31/2→-3→-21/2→-
It changes in the order of 2→-11/2→-1→-1/2→0.

(ST) is a switch that sets the exposure time, and each time this switch (ST) changes from "OFF" to "ON", the exposure time changes to the short side in IEv steps.And when in S mode is 32sec → 16sec → 8
see→・・・・・・→1/1000sec→1/20
00sec→1/4000sec→3Zsec→・・・
..., and when in M mode, 32s
ec-+ 16sec-+ ---) 1/2000S
eC → 1/4000sec → Valve → 32sec →...
1. Therefore, when in M mode, the valve mode can be set by operating the switch (ST). The switch (SA) is a switch for setting the aperture value, and when this switch (SA) changes from "OFF" to "ON", the aperture value changes from the maximum aperture value in 1/2Ev steps when the mode is A or M mode. Changes toward the aperture value. When the maximum aperture value is reached, the aperture value changes to the maximum aperture value. Switches above (S MOL (S
IS), (SOR), (ST), and (SA) are switches that are closed by operating operation keys provided outside the camera, respectively. In addition, a switch (S I),
(S2), (SMO), (S I S), (S OR,
), (ST), and (SA) are AND circuits (A N
) to the interrupt terminal (INT) of the microcontroller (BMC).
Therefore, when the data setting key provided on the outside of the camera is operated or the release button is operated, the signal lines (B S , ), (B S 2) via “Lo
If the microcomputer (BMC) is in a stopped state, the microcomputer (BMC) accepts this interrupt signal and starts operating when the "ud" signal is input.The switch (SCN) is activated by the mechanical film counter. It's a switch.

This switch (S CN ) remains "ON" until the film counter reaches the position where the number of shooting frames indicates "1".
From the "1" position onwards, it becomes "OFF". The signal from this switch (SCN) is sent to the input port (IP) of the microcontroller (BMC) and the back circuit (
BCKC). The microcomputer (BMC) performs exposure control using the shortest exposure time and maximum aperture value while the switch (SCN) is "ON". On the other hand, the buck circuit (BCKC
) is the signal line (
Data imprinting operation is not performed even if a pulse signal is input from IP). Furthermore, the back circuit (BCKC) has the function of adding or subtracting "1" from the set value for each pulse from the input signal line (IP) every time a photograph is taken, and imprinting this data. Addition and subtraction operations are not performed while (SCN) is "ON". In addition,
While the switch (SCN) is “ON”, the signal line (IP
), the back circuit (
BCKC) eliminates the need to check the state of the switch (SCN) and determine whether to imprint data or whether to perform addition/subtraction (and also eliminates the need for terminals (T,). An electric film counter is used instead of a mechanical film counter, and the darkness until the film reaches the correct frame position (counter display is 1") is "Lo
w” signal may be output to the terminal (T, ), or furthermore, the pulse may not be output to the signal line (IP).

The switch (S A S ) can be turned “ON” or “OFF” in conjunction with the metering mode switching member attached to the exterior of the camera.
”, and this signal is sent to the microcontroller (BMC).
I am inputting data to the microcomputer (B) (IPs)
MC) will send “Lou+” from the output port (OF2) to the signal line (ASMO) if a “Low” signal is input.
This signal is output to set the partial photometry mode, and the display unit (D S P ) is caused to display the partial photometry mode. On the other hand, if a “High” signal is input to the input capo (IP, ), the signal line (ASMO) is
+'' signal is output to set the average metering mode, and the display section (D
S P ) sends data indicating the average photometry mode. The switch (S,) is a switch that turns "ON" when the exposure control mechanism finishes the exposure control operation, and turns "OFF" when the shutter charging operation of the exposure control mechanism finishes, and the signal from this switch (S,) is sent to the microcomputer (BMC). The microcomputer (BMC) controls the exposure even if the release switch (S2) is turned "ON" if the "L oul" signal is input from this switch (S4). It does not move into action.

The microcomputer (BMC) outputs pulses at a time corresponding to the film sensitivity to the signal line (IP), but the back circuit (BCKC) shown in Figure 1 is connected to the camera body (BD). A time corresponding to the read film sensitivity is created in the back circuit (BCKC), and data is imprinted only during this time. Therefore, the pulse from the signal line (IP) is used only as a signal to start the imprinting operation. However, it does not have the function to read film sensitivity data from the camera body and create a time corresponding to this data, and the signal line (IP
) is attached to the camera body (B
D), so the microcontroller (BMC)
has this kind of functionality. In addition, the back circuit (B
CKC) has a function to record the exposure time and aperture value sent from the camera body for exposure control. For this reason, the microcomputer (BMC) always sends the exposure time and aperture value to the back circuit (BCKC) before entering exposure control 70- and outputting a pulse to the signal line (IP). Therefore, the back circuit (BCKC) is designed to reduce the probability that the rear curtain starts running and stops before data imprinting reaches the appropriate time.
When the exposure time and print value for control are detected from D), the imprinting operation is started.

Hereinafter, the operation of the camera system shown in FIG. 1 will be explained based on the chart 70 in FIG. 2.3. switch (S,)
, (S 2) (S MO), (S I S ), (S
OR)? Either (S T ) or (S A ) is “O
N'' or the signal line (BS, ) of the buck circuit (BCKC).

When the “Lou+” signal is input from (BS2),
The output of the AND circuit (AN) becomes "Lou+", and the interrupt terminal (INT) of the microcomputer (BMC) becomes "LOL11".
Then, the microcomputer (BMC), which had stopped operating, starts operating from step #0.

First, in step #O, Lo is applied to the signal line (C8B).
u+'' pulse is output to activate the buck circuit (BCKC), and in step #1, the transistor (BT)
“ON” and the photometry circuit (FLML (AMM), A-
D, D-A conversion circuit (ADA), lens circuit (LEC)
Start supplying power to. Then, in step #2, it is determined whether the "LOLI+" signal is input to the input port (IPI), that is, whether the switch (S2) is turned "ON".
It is determined whether a release signal is input from the signal line CBS2) of the back circuit (BCKC). If the "LoII+" signal is input to the input port (IP), the process moves to step #3. In step #3, it is determined whether the switch (S,) is turned "OFF" and charging of the exposure control mechanism is completed.
Since the exposure control operation cannot be started unless the switch (S
, ) is "OFF", then in step #4 it is determined whether the 7-lag RLEF is "1". This 7
The lug RLEF is set to "1" if the exposure control data (TVtAv) is ready and the release prohibition signal is not input from the back circuit (BCKC), but if the data preparation is not completed or the back circuit If a release prohibition signal (input at the end of bracket shooting) is input from (BCKC), it is reset to 0. If the 7-lag RLEF is "1°" in step #4, the process moves to step 70- of the exposure control operation starting from step #110, and if the 7-lag RLEF is "0", the process moves to step #10.

Also, in step #2, enter “Lo
If the signal w'' is not input, the process moves to step #10.

In step #10, “Lo
Determine whether the “u+” signal is input, and if it is input, set the 7 lags S and F to “1”; if not, leave S and F at “0” and set #12. Move to step. This is a preparatory operation to determine whether "LOIIl" is input to the input port (IP) by the switch (Sl) or by the buck circuit (BCKC).Next, step #12 Now, switch (S A
Depending on the state of S), one of the partial and average light receiving elements in the photometry circuit (AMM) is selected, and the process moves to step #13. In step #13, the signal line (C8L
) by "Lou+" and repeating the serial input/output operation multiple times to read various data from the lens circuit (LEC). Next, in step #14, A- is read from the clock output terminal (CK OUT ). Start outputting the D conversion clock, output a "Lou+" pulse to the signal line (ADSTA), and convert the output of the photometry circuit (AMM) to A-D.

The DA conversion circuit (ADA) starts the operation of A/D conversion.

Next, in step #20, it is determined whether the 7 lags S and F were set to "1" in step #11,
If it is set, the process moves to step #21; if it is not set, the process moves to step #24. 7. If the lags S and F are not set, it means that the operation is not due to the switch (Sl) or the signal line (BS, ) of the back circuit (BCKC), and in this case, the automatic focus adjustment operation In order to prevent the photographic lens from moving inadvertently due to
” and reset the 7 lags S and F to “0” in step #25 (in this case, they have already been reset to “0”). On the other hand, in step #20 When the lags S and F are "1", in step #21, the input capo) (IP.) is still "Lou+".
Determine whether it remains as it is. This is the buck circuit (BCK
C) to start the boost operation of the 7 lash device 1 minute before interval shooting, or the back circuit (BCK
In order to start the camera body (BD) when C) starts the operation for exposure calculation, the signal line (B S +
) is designed to output a "Loul" pulse. By the way, when the camera body (BD) is activated by the back circuit (BCKC), it is undesirable that the automatic focus adjustment operation is performed and the lens moves inadvertently.

Therefore, the back circuit (BCKC) is connected to the camera body (BD).
When starting up the microcontroller (BMC), the time from the time when the mW-inclusive signal is input is shorter than the time up to step #21, and longer than the time up to step #10.
A pulse of "Low" is output to the signal line (BS, ), and the input capo (IP.) outputs a "Low" pulse at step #21.
The signal line (B S +) is "High" at the time of determining whether it is "U+" or not. Therefore, in this case, the signal line (AF
EN) is set to "High" to disable the automatic focus adjustment operation, and the process proceeds to step #26 via step #25.

On the other hand, in step #21, the input capo) (IP.) is Lo.
w'', the photometry switch (S, ) is set to ``ON'', and in this case, the signal line (AFEN) is set to ``Lou+'' and the auto focus is activated. Activate the adjustment circuit (AFC), set the signal line (CS AF) to "Lou+", send data for automatic focus adjustment, and set the signal line (C8AF) to High.
”, then in step #25, set the 7 lags S and F to “
0" and move on to step #26.
In step #26, data is read from the flash device (FL) and receiver (RFC).

As mentioned above, this operation causes the signal line (C8F) to be “L”.
ow" and outputs a pulse during the first time to the signal line (FMO). Then, serial input/output operation is performed. First, the first byte data is sent from the flash device (FL), then the receiver ( RFC) to the meter (ME
2nd byte of the above data read from T ), 3
Data is output in the order of byte and fourth byte, and this data is read. Then connect the signal line (C5F) to “
HiHh” and the operation of step #26 is completed.

Next, in step #30, it is determined whether the film sensitivity setting switch (srs) has changed from "OFF" to "ON", and if it is determined that it has changed, the film sensitivity data is increased by 173Ev. The process moves to step #32. On the other hand, if it is not determined that a change has occurred, the process immediately moves to step #32 and checks whether the exposure compensation amount setting switch (ORS) has changed from "OFF" to "ON". Then, when a change is detected, the exposure compensation amount is increased by 172Ev in step #33, and the amount of exposure compensation is increased in step #34.
If no change is detected, the process directly advances to step #34.

In step #34, the switch (S CN ) is turned on.”
If it is "OFF", the process moves to step #40. On the other hand, the switch (SCN) is ON''
If so, the film counter is the regular number of frames (“1”)
is not displayed (S...), and in this case, the process moves to step #35. In step #35, the shortest exposure time (Tvmax) and the maximum aperture value (Avmax) corresponding to the minimum number are set for control, and #1
After setting the 7-lag RLEF to 1" in step #08, proceed to step #75.
) is read from the receiver (RFC), the camera body ignores this data and
flaXy A vmax t' Exposure control will be performed.

In this case, exposure calculation is not performed on the camera body (BD), and furthermore, settings other than film sensitivity and exposure correction amount data are not accepted. In addition, the variation circuit (BCK
Even if data prohibiting the exposure control operation is input from C), it will be ignored.

In step #40, it is determined whether the flag BCKF is "1". This flag BCKF is the back circuit (BCK
C) calculates exposure control data, sends this data to the camera body (BD), and uses data (hereinafter referred to as back ICP) for the camera body (BD) to perform exposure control based on this data. ) is read “
It is set to "1", and is reset to "0" when it is not. Therefore, it is always reset to "0" at the first operation, so it moves to step #41. On the other hand, from the back When exposure control is performed based on the data of (BCKF=1), the data change step operations of #43 to #48 are not performed and the process immediately proceeds to step #51.Therefore, the switch (S M O), (S
Even if T ) and (S A ) are operated, no data is changed.

In step #41, the mode switch (SMO) is set to “O”.
It is determined whether the change has been made from "FF" to "ON", and if the change is determined, the exposure control mode is changed. On the other hand, if the switch (SMO) remains "OFF" or "ON", the exposure control mode remains unchanged and the process moves to step #43. In step #43, it is determined whether the mode is S or M. Since the S or M mode accepts a change in exposure time, the process moves to step #44.

On the other hand, if it is not the 34M mode, the process immediately moves to step #46. In step #44, switch (ST)
It is determined whether the switch (ST) has changed from "OFF" to "ON", and if a change is detected, the exposure time is increased by IEv.On the other hand, if a change in the switch (ST) is not detected,
Immediately move to step #46.

In addition, as mentioned above, the shortest exposure time (1/4000se
After c), the switch (ST) changes from “OFF” to “ON”.
”, in S mode, RWc exposure time (3
2 seconds), and if in M mode, changes to a valve. In step #46, it is determined whether the mode is A or M. If the mode is not A or M, the setting of the print value will not be accepted, so proceed directly to step #50. If the mode is A or M, proceed to step #47. A change in the switch (SA) is determined in each step. If there is no change, the process directly proceeds to step #50, and if a change from "OFF" to "ON" is determined, the threshold value is set to 1. /2Ev increase and next #
Move to step 50. In addition, #30. #32. #
41. .

#44. To detect the change of the switch from "OFF" to "ON" in #47, the state of the switch at that time is memorized at each step, and when the next step is reached, the state of the switch of the mackerel and the previous state are stored. It can be detected by comparing it with the stored signal.

In step #50, the signal line (C8A) is set to “Lo”.
w", then perform serial input/output operation, read the A-D converted data in series, and connect it to the signal line (C8A).
is set to “High” and the clock output terminal (CK OU
The output of the clock from T) is stopped and the process moves to step #51. Then, in step #51, flag B
Determine whether CKF is “1” and if it is “1”, #52
．． The process moves to step #55 without passing through the calculation steps 53 and 54. On the other hand, if the flag BCKF is "0", the process moves to step #52 and the flash device (PL)
Determine whether a charge completion signal is input from

If the charge completion signal has been input, exposure calculation for 7-lash photography is performed in step #53, and if the charge completion signal has not been input, exposure calculation for ambient light photography is performed. When the above calculation operations are completed, the microcomputer (BNC)
The process moves to step #55. In addition, #53.
A specific example of the calculation of No. 54 is given in Japanese Patent Application Laid-Open No. 59-1111.3.
No. 2, JP-A No. 59-1.40408, etc., so the description thereof will be omitted.

In step #55, the signal line (C3B) is set to “Lo”.
u+", and the signal line (BrO) remains "Higb", and the data is transferred to the back circuit (BCKC). The following data is sent from the camera body (BD). First, 1 byte The Yth byte is data sent from the flash device, the 2nd byte, 3rd byte F, and 4th byte are the meter (ME) read from the receiver (RFC).
The data is from T. In addition, the back circuit (
When BCKC) determines that exposure control data from a meter (MET) has been input, it performs a display based on this data and sends this data back to the camera body (BD) as control data. This function is called an external 7 function. This external function is a meter (M E
When exposure control data from T ) is input, the buck circuit (BCKC) performs exposure calculation function (
If the exposure function (hereinafter referred to as exposure function) is active, what exposure modes (three types of P modes and S
, A, M mode and manual long time (M/LT)
) mode) is selected, it becomes an external function and causes exposure control to be performed based on data from the meter (MET). Furthermore, when the exposure function is active, a function that stores a plurality of photometric values from the camera can be activated (hereinafter referred to as a multifunction). These 7 functions include the average value (Σ Bv
i/N) (average mode i=1 - mode), the intermediate value between the maximum and minimum stored photometric values (((
Bvmax+Bvmin)/2) (hereinafter referred to as center mode), mode to determine the value (Bvmax-2,3) that reproduces the maximum value to the upper limit of film latitude (highlight mode), and minimum value to the lower limit of latitude. There is a mode (shadow mode) for finding the value to be reproduced (Bvmin+2.7). Even if such a multi-7 mechanism is active, the meter (ME
If exposure control data is input from T), it becomes an external function and the multifunction becomes invalid. Furthermore, when the exposure function is in the active state, a function for performing bracket photography (bracketing function) may also be in the active state. At this time, the meter (M
When it is determined that exposure control data from the meter (MET) has been input, bracket photography is performed based on the exposure control data from the meter (MET).

The 5th byte of data sent from the camera body (BD) to the back circuit (BCKC) is the A-D-D-A conversion circuit (A
Photometric data read from (DA) (By-Avo) (A
vo: Open aperture value), the 6th byte is the lens circuit (LEC
), and the seventh byte is the maximum aperture value data (Avmax). Furthermore, the 8th byte is the minimum exposure time data (Tvmax), the 9th byte is the maximum exposure time data (Tvmin), and the 10th byte is the synchronization limit exposure time data for flash photography (Tvx).
), the 11th byte is exposure time data (T v) determined by the camera body (BD), and the 12th byte is aperture value data (A v) determined by the camera body. Furthermore, the 13th byte is the film sensitivity (Sv), and the 14th byte is the exposure compensation amount (Cv). When the above data transfer is completed, the microcomputer (BMC) of the camera body (BD)
Move to step 56 and set the signal line (BIO) to L.
oIII". Then, 1 byte of data is sent from the back circuit (BCKC). This data is the aforementioned back ICP. When the exposure function is selected, the back circuit (BCKC) outputs, for example, "80H" ( If the exposure function is not selected, the back circuit (BCKC) does not output this data and the camera body (BD) outputs "OOH" data (H indicates a hexadecimal number).
After reading this pack ICP data, the microcomputer (BMC) reads the signal line (C8B),
(B IO) is set to "High" and the process moves to step #57.

In step #57, it is determined whether the back ICP is "80H", and if it is not "80H", the back circuit (BCK
This is the case when a back cover without C) is attached or the exposure function is not selected in the back circuit (BCKC). In order to perform calculations based on the data, 7 lag BCK is added in step #58.
Reset F to "0" and proceed to step #90.

If it is determined in step #57 that the back ICP is 80H, it means that the exposure function has been selected, and the process moves to step #60 to set the flag BCKF to "1". , back circuit (Bc
Based on the data sent to the back circuit (BCKC)
) to calculate the exposure control data #61
Wait at the step.

During this time, the back circuit first calculates a photometric value based on the sent data. During this time, the signal line (C8
B) remains "Lou+". This is true if the multi-7 function is not selected (Bv-Av
o) It only performs the calculation of 10 Avo = By, but if the multi 7 function is selected, the calculation will be performed according to the mode selected from among the above-mentioned average mode, center mode, highlight mode, and shadow mode. Perform calculations. In addition, when using the multi-7 function, unless a memory operation (pressing the memory key) is performed, each time the photometry data from the camera body (BD) is updated,
Exposure calculations are performed based on the data, but once the storage operation is performed, control data calculations are performed based on the stored photometric data, and the data from the camera body (BD) is only displayed.

Then, exposure calculation is performed according to the photometric data obtained in this way and the set exposure mode, and control data is calculated. This calculation is performed using the first program (Pl) with a slope of 2/3, which divides Bv10Sv''Ev into aperture value and exposure time at a ratio of 2:1.
mode (in principle Av=2/3 ・EvS Tv=1
/3 ・Ev), the second program with a slope of 1/2 (P2
) mode (A v=1/2・Ev, Tv= i/2
・Ev), third program (P3) mode with slope 2/3 (Av= 1/3 ・Ev.

There are three types: Tv=2/3・Ev). Also,
The S mode calculates Ev-Tv=Av from the Tv set in the buck circuit (BCKC), and the A mode calculates the set A
Ev Av=Tv is calculated from v, and further, in M mode, the set A Vt T v is calculated as a control value.

In addition, if the calculated Av becomes Av>Av+nax, EV-Av+nax=Tv, and if 'Av<Avo, EV Avo=Tv is calculated, and this Tv and A
Let vmax+or Tv and Avo be the calculated values. Similarly, when Tv<Tvtnin, Tvtnin and EV-
When Tvmin"Av is Tv>Tvmax, the calculated values are Tv+nax and EV-Tv+nax=Av. Also, when in P IIP2.P mode, A
The aperture is limited by manually set AV++Av2 such that vo<Av, , Av2<AVInaX.

Furthermore, in the M/LT mode, it is possible to set an exposure time longer than the maximum exposure time (Tvmin) that can be set on the camera body. When such a time is set, data for the bulb is sent to the camera body (BD), the camera body is set to bulb mode, and this time is set to the back circuit (BD).
BCKC).

During this time, the signal line (BS2) is connected to Lou1''
As a result, the rear curtain is prevented from running, and when the count ends, (BS2) is set to High'' and the rear curtain is run.The display data on the camera body is the bulb display data. Instead, it sends the data for displaying the set time.If Multi 7 Angkun Yong is not selected, the exposure control diagram and Ev value line for each mode will be displayed with the vertical axis as the aperture value and the horizontal axis as the exposure time. When the multi-function is selected, each stored value and current value based on the exposure control value is displayed graphically on the side.

Also, if the bracket function is selected,
Using the calculated control value as a reference, a control value is calculated by shifting the set deviation amount by the number of frames at that time. Note that the graphic display at this time displays the current shooting position in the form of a bar graph. Details of the display using the above exposure functions will be described later.

In addition, if it is determined that there is a charging completion signal in the data from the flash device that is input via the camera body, the back circuit will not display the two series of calculations and will Display Tv and Av from (BD) and use the data as control data. This means that the calculation for 7-lash photography (step #53) on the camera body side is
As shown in No. 11.132, etc., the back circuit (BCK
This is because there is no need to perform calculations for flash photography on the C) side.

For example, in order to support a camera body that does not have the above-mentioned flash photography function, the same calculation as step #53 is performed on the back circuit side, and when the charging completion signal is input, the exposure is If a function is selected, the flash function may be automatically selected, calculations may be performed according to the exposure mode set at that time, and control data may be sent to the camera body. Furthermore, a calculation combining a multifunction, a bracket function, and a 7-ratio function may be prepared, and the results of this calculation may be sent to the camera body (BD).

When sufficient time C has elapsed to complete the above operations, the microcontroller (BMC) moves to step I62 (7), sets the signal line (BIO) to Lou+'', and performs serial input/output operation. and reads data from the back circuit (BCKC).The first byte is exposure time data for control (bulb in M/LT mode), the second byte is aperture value data for control and display, and the third byte is exposure time data for control. The first byte is exposure time data for display (setting exposure time in M/LT mode), and the fourth byte is back exposure mode (P I, P
2. P3 is P mode, M, M/LT mode is M mode, external fan crayon is meter photometry mode), 1.2
The control data of the byte includes out-of-interlock data indicating that Ev is limited to a limit value because it is out of control interlock, data (release prohibition data) indicating whether exposure control operation is prohibited, and the like. After reading this 4-byte data, the microcontroller connects the signal line (CS B), (B I
) is set as "Higl+", and in step #63, the read T v and A v are set as control data. Then, it is determined whether the release prohibition data has been read, and if it has been read, the 7-lag RLEF is set to 1, and if it has not been read, the 7-lag RLEF is set to 0.
” and move on to step #70.

In step #70, the exposure mode is displayed according to the read mode data (M mode when in meter metering mode), and in step #71, it is determined whether or not non-linked data is being read, and the data is read. If so, a warning is displayed, and if it is not read, the warning is not displayed and the process moves to step #74. #7
In step 4, select meter metering mode or camera body (B
D) indicates whether the mode is average metering mode or partial metering mode.

In step #75, the control exposure time and aperture value are displayed. Note that when long exposure time data is sent from the back circuit (BCKC), bulb data is sent for control purposes, but this long time data is sent for display purposes. This data will be displayed.

Next, in step #76, the film sensitivity and exposure compensation amount are displayed, and then, based on the data sent from the flash device (FL), it is displayed whether or not flash photography will be performed. Next, in step #78, the signal line (C
8F) and outputs a pulse during the second time to the signal line (FMO).

When the 7 lash device (FL) reads this pulse, it becomes ready to read data from the camera body.

The microcomputer (BMC) firstly uses the first byte to control aperture value and exposure control mode, the second byte to add the film sensitivity and exposure compensation amount (Sv + Cv), and the third byte to the focal length of the interchangeable lens. Data (fv). The method of using these data is as described above.

When the above operations are completed, the switches (S + ), (S 2) - (S M O), (S
I S )y(S OR), (S T ), (S A
) is closed. If even one is closed, the timer is reset and started in step #80, and the process returns to step #2 to repeat the operations described above. On the other hand, if all of the above switches are "OFF", step #81 #
It is determined whether the timer count time (10 seconds) started at step 80 has ended, and if it has not ended, the process returns to step #2. On the other hand, when 10 seconds have elapsed since all the switches are turned off, the process moves to step #85. And #85
In the step, interrupts to the interrupt terminal (INT) are enabled, 7-lag RLEF and BCKF are reset to "0", the display is set to "OF F", and the &[transistor (BT)
The microcomputer (BMC) stops operating by setting it "OFF".

When it is determined in the step #57 that the back TCP is not "80H", the 7 lag B C is determined in the step #58.
KF is reset to "0" and the process moves to step #90 in FIG. In step #90, the meter (ME
The receiver (RFC) reads exposure control data from T) and determines whether the camera body (BD) has read this data. And when I read #9
If no reading has been performed, the process moves to step #100. In step #91, the data read from the meter (MET) is limited to the maximum aperture value and the maximum aperture value, and the exposure time is limited to the shortest and longest values for continuous light photography. For flash photography, limit the exposure time to the sync limit and maximum exposure time. Then, the data from the meter (MET) thus determined is set as a control value, and the exposure control mode is set to M mode and the photometry mode is set to meter photometry mode, and the process moves to step #105. On the other hand, at step #90, the meter (MET
) is #100 if no data is read from
In step #53 or #54, the data calculated in step #54 is set as control data. In addition, #63゜9
2. Setting the control fringe value at 100 is based on the number of aperture steps (
Av-Av. ).

Step #101 displays the exposure control mode of the camera body (BD), further displays the metering mode, and then steps #105.
Move to the next step. When the control data is limited to the interlocking limit data, the warning display is set to "ON", and when it is not limited, the warning display is set to "OFF".
The 7-lag RLEF is set to "1" and the process moves to step #75 in FIG.

In step #2, the input port (IP,) is “Lou+”, the switch (S,) is “OFF”, and the 7-lag RLEF is “Lou+”.
1", the exposure control operation starts from step #110 in Figure 3. First, in step #110, the signal line (
A F E N ) is set to "High" to stop the operation of the automatic focus adjustment circuit (AFC), and then a release signal is transmitted to the flash device (FL).

This operation is performed by setting the signal line (C8F) to "LolIl", outputting a pulse at the third time 11 to the signal line (FMO), and setting the signal line (C3F) to "High" again. When the flash device (PL) determines that a pulse during this third time period has been input, it enters the light emission mode for photographing. Next, connect the signal line (C3B) to “
Control exposure time data and aperture value data are sent to the back circuit (BCKC) as "Lou+".

This data is used as data for imprinting in the back circuit (BCKC), and when this data is input, the back circuit starts a data imprinting operation if the imprinting function is selected. Some of the imprinting functions include the imprinting modes (control data mode, year/month/day mode, month/day/year mode, day/month/year mode, month/date/hour mode, date/time).・There are minute mode, hour/minute/second mode, count up mode, count grand mode, and fixed data mode.

In the control data mode, control data calculated by the back circuit (BCKC) (only when exposure function control is selected) or control data sent from the camera body (BD) in step #112 is imprinted. Year/Month/Day mode, Month/Day/Year mode, Day/Month/Year mode, Day/Month/Hour mode, Day/Hour/Minute mode 1, Hour/Minute/Second mode are each operated by the buck circuit (BCKC). Print each data from the calendar circuit in order of mode name. In count up mode and count grand mode, a value obtained by adding or subtracting "1" from a preset fixed value each time a photograph is taken is imprinted.

Fixed data mode imprints preset values.

Next, in step #113, the microcomputer (BMC) sets the signal lines (C3A) and (ADMO) to "LoIll" and adds the film sensitivity and exposure compensation amount sum data (Sv + Cv
) is sent to the A-D-D-A conversion circuit (ADA). circuit(
A D A ) reads this data Sv + Cv and D
-A conversion and output to a flash light amount control circuit (FLM). Next, set the film sensitivity on the timer to control the imprinting time, and in step #115 set the signal line (IP) to "Low" and set the back circuit (BCKC) to "Low".
), it is possible to determine the start of data imprinting, and the imprinting operation of a data imprinting device that does not have an imprinting time control function is started. Then, interrupts by the timer are enabled and the timer starts counting. Then, in step #120, enable counter interrupts,
A "Lou+" pulse is output to the signal line (RL) to operate the release magnet and start the focusing operation and mirror up operation. Then, in step #122, sufficient time is waited for the mirror up operation to be completed. During this time, the aperture pulse output circuit (APG
) pulse is input to the clock input terminal, and the number of refinement stages data preset in the grand counter is
It is subtracted every time a pulse is input. Then, when the contents of the counter become “0”, a counter interrupt occurs and #1
Perform 50 steps. In this step, a pulse of "LolU" is output to the signal line (AP) to operate the frit magnet and stop the narrowing down operation. Then, the timer interrupt is enabled and the process returns to the main routine. Also, if an interchangeable lens for which aperture control is not possible is attached or no interchangeable lens is attached, the counter interrupt may not occur □, so if a certain period of time elapses in step #122, Then, the counter interrupt is disabled and the process moves to step #125.

In step #125, it is determined whether the control exposure time data indicates a valve. And if it is not a valve #12
Move to step 6.

In step #126, the signal line (IC) is set to “Low”.
" pulse is output to activate the front curtain magnet and start the front curtain running. Next, the exposure time is counted, and when the count is finished, "LoI" is output on the signal line (2C).
A pulse I+'' is output, the trailing curtain magnet is operated to start running the trailing curtain, and the process moves to step #135.

If it is determined in step #125 that it is a valve, the process moves to step #130, and the leading curtain is run.

Then, the input signal to the input capo) (IP,) becomes “High”.
Wait until it becomes h''. At this time, the back circuit (BCKC
) is not attached, wait until the release button is released and the switch (S2) turns "OFF", and when the switch (S2) turns "OFF", the trailing curtain starts running. On the other hand, the back circuit (BCKC) is installed and the M/LT
is selected, the signal line (IP) is “Lo”.
The buck circuit (BCKC) starts counting time from the time when the signal reaches "u+", and sets the signal line (B S 2) to "Low". And the back circuit (BCKC)
When the count ends, the signal line (BS2) is set to "Hrgh", and the camera body (BD) uses this signal to start running the trailing curtain. In this way, in M/LT mode, the camera body (B
Exposure time counting starts with the signal input from D) via the signal line (IP), and since it is controlled in 1 sec as the minimum unit, the exposure time is not precisely controlled. Since the overall exposure time is long, the error does not have much of an effect on the exposure.

Normally, the timer corresponding to the film sensitivity has finished counting up to step #135, and when the timer has finished counting, the timer interrupt is activated.l) #1
In step 45, the signal line (IP) is set to "High" to stop the imprinting operation, enable counter interrupt, and return to the main routine.

In step #135, when the exposure time is short, the signal line (IP) remains "Low" even when the trailing curtain starts running.
There are times when Therefore, in order to forcibly stop the imprinting operation (to prevent imprinting from occurring during winding), the signal line (IP) is set to "High". Also, in step #136, the back circuit (BCK
In order to stop the imprinting operation caused by C), a "Lou+" pulse is sent to the signal line (C8B) for a certain period of time, and the back circuit (BCKC) starts imprinting when this pulse is input from the signal line (C8B). Abort the operation.

Then, counter and timer interrupts are not accepted, and the trailing curtain waits for the running of the trailing curtain to be completed and the switch (S, ) to be turned ON''.Then, when the switch (S4) is turned to ``ON'', the 7 lag Set RLEF and BCKF to “0” and #2
Return to step 1 and perform the operations described above.

When a continuous shooting mode such as interval function or bracket function is selected in the back circuit (BCKC), “
The “Lou+” signal continues to be input, and the above-mentioned exposure control preparation operation is performed even during the winding operation, and as soon as the winding is completed and the switch (S, ) is turned “OFF”, the next exposure control starts. Such continuous shooting is also performed when the release switch (S2) remains "ON".

When the camera body (BD) is activated by a signal from the signal line (BSI) of the back circuit (BCKC), automatic focus adjustment is not performed, but boosting of the flash device (FL) is started. The width of the starting pulse is distinguished between the activation when the key operation of the back circuit (BCKC) is interrupted, and the activation when the key operation of the back circuit (BCKC) is interrupted.
An automatic focus adjustment operation may be performed when a key operation is performed.

Furthermore, there are other devices that are not activated when activated by the back circuit (BCKC) but activated when activated by the photometry switch (Sl), such as a buzzer that warns of camera shake. In addition, in order for the microcomputer (BMC) to determine what the start signal is, a back circuit
The signal from C) is a pulse with a width of less than a certain period of time, but if you input it to a different input port from the switch (S,), you can take measures such as limiting the duration of the pulse. becomes unnecessary.

Note that the back circuit (BCKC) allows exposure time control longer than the maximum exposure time of the camera body only in M/LT mode, but it can be used in any mode as long as the exposure function is selected. Long-term exposure time control may be possible, or even possible when an external function is selected.

Also, during interval shooting, a start signal is sent to the camera body (BD) one minute before starting the shooting operation of one group, and the camera body (BD) activates the 7 lash device (FL).
) by exchanging data with the flash device (FL).
) is starting to increase in pressure. By the way, since the flash device continues to increase the pressure for 15 minutes after starting the pressure increase operation, the external pressure is often continued even after one group of photography is completed. If the distance between the groups is very long, the external pressure after one group is photographed is wasted, resulting in wasted battery power. Therefore, when the shooting of one group is completed, one
Data indicating that shooting for one group has been completed is sent to the camera body (BD) (for example, by setting the "least significant bit" of the back ICP to "1"), and when this data is input, the camera body (BD) performs 7 shots. Send a boost prohibition signal to the flash device (FL) (prepare the present bit or 4th byte of the 3-byte data sent to the flash device (FL)), and when this data is input to the flash device (FL), The boosting operation may also be stopped.

Next, the relationship between the function and display of the back circuit (BCKC) and a specific example of the back circuit (BCKC) will be explained.

FIG. 4 shows an external view of the bag (BCK). (1) is the battery lid of the battery compartment, and (2) is the external display section, which indicates that the operation is stopped. (3) shows a key cover for protecting some keys of the operation key, (4) shows a grip part, and (5) shows a part of the operation key.

FIG. 5 shows a state in which the external display section in FIG. 4 is in an operating state and the key cover (3) is open. Explain the function of each key. (6) is a function key to select each function. (7) Selects the mode within each function using the mode key. (8) is the operation key,
Switches between execution and non-execution of each function. (
9) Change the external display one by one using the enter key. (
10) uses the adjust key to change the external display from the control state to the numerical value setting state, and from the numerical value setting state to the control state.

(11) is the up key, and (12) is the grand key to change numerical values in each mode and shift the program line. (13) uses the cursor keys to sequentially advance each digit to be changed when changing numerical values in each mode. (14) is a memory key that imports photometric data from the camera. (
15) Use the memory clear key to clear all the photometric data imported using the memory key.

Figure 16 shows the operating state on the external display, and EXPO
The P1 mode of the 3URE7 mechanism is displayed. Each display section will be explained. (16) is a character display section using a 5.times.7 dot liquid crystal display with 10 digits, and displays shutter speed values, color print values, mode names, messages for operating procedures, etc. (17) indicates the display position of the shutter speed value <T> and the fringe value <F>. (18) displays the mode selected in the EXPO3URE7 function. (1) indicates each function name, and each time you press the function key (6), EXPO
3URE→(MULTI-M)→(BRACKET)
→IMPR Ding NT →INTERVAL→B&W-+
It will transition to EXPO3URE-... M.U.
LTI・M function and B RACK E T
7 Anxigon is skipped and cannot be selected when EXPO8URE7 Anxion is not executed.

Also, EXTERNAL7 anxion is EXPO8UR
Camera body (BD) when E7 Anximin is in execution state
This can only be executed when control data from the meter (MET) is input, and there is no function key to select it. (20) is a symbol indicating the selected function in the external display. (21) is a symbol indicating that each function is in an execution state.

(22) is an index indicating the shutter speed value, and (
23) is an index indicating the aperture value. If the shutter speed value is 2 seconds or less, it will be displayed with a "seal" symbol, and if the aperture value is F32 or higher, it will be displayed with an "=" symbol. (24) is the graphic display section, and (25) is the photometric line, with equal EV
Since it indicates the value, it will be called the EV line below.

(26) indicates the P1 mode of the outer 2/3 area which is a high-speed program in the program line. Depending on the lens, the limit is Fl, 4 on the open side, and F22 on the aperture side.
Further, arbitrary aperture restriction is performed by opening F2, F8, and Fll. In the character display section, lowercase numbers indicate 1/4 EV units, and the control point that is the intersection of the program line and EV line < 1/60, F 4
+1/4EV > is displayed.

FIG. 7 shows the P2 mode in which the slope of the program line is 171, and FIG. 8 shows the P3 mode in which the slope of the program line is 1/2.

As can be seen from this figure, when in P mode, the graphic display dots are displayed at IEV pitch on the F value side, and when in P3 mode, the display dots are displayed at IEV pitch on the exposure time side so that they are aligned in a straight line. Table 1 shows the transitions of each function and each mode. The double-framed modes are initialized at power-on reset, such as when replacing batteries. The operating procedure for each mode in each function will be explained.

FIG. 9 shows the P2 mode of EXPO8URE7 Ankshishin. Use the FUNC key (6) to move the -” mark to select EXPO8URE FUNCTION, then press the MODE key (7) to display the mode name “PROGRAM2” on the character display section (16), and select P2. mode.The mode display section (18) of the EXPO3URE7 function has a "ma" mark lit above the "P".In the graphic display (24), the camera's shutter speed control limit 174
000 seconds and 30 seconds and lens control limits F1.4 and F
22, the program line is restricted. Also, the slope part of the program line is 17250 seconds in the initial setting state,
It passes through the F5.6 point. Next, press the ○PE key (8
), the EXPO3URE7 function enters the execution state, the "l" mark (21) lights up as shown in FIG. 10, and the EV line (25) corresponding to the photometric value appears.

Next, press the ENT key (9) to display the mode name (“PR”).
OGRAM2") to the control display (hereinafter referred to as 0UTPUT display). In this case, the program line and E
The shutter speed value of 1760 seconds and F2.8, which is the intersection of the V lines, are displayed on part of the character (Figure 11)
. In the 0UTPUT display, press the UP key (11), D
The OWN key (12) allows the slope of the program line to be shifted. FIG. 12 shows a state in which the UP key (11) has been moved to the right. Next, the ADJ key (
10) Press to display the settings (hereinafter referred to as INPUT display)
The screen changes to , and first asks for the FMAX value. 1st
In FIG. 3, the FMAX value shows F22 because it is an initial setting. When the FMAX value is lowered to F8 using the DOWN key (12), as shown in FIG. 14, the slope of the program and ram line stops at F8, and a restriction is added. FMA
After setting the X value, press the ENT key (9) to
Proceed to N. In FIG. 15, the character display section is switched to FMIN value setting. Due to the initial setting, Fl, 4 is displayed. Change the FMIN value using the UP key (11). FIG. 16 shows a state where F2.8 is set. Next, when the ENT key (9) is pressed, "COMPLETED" indicating that the setting is completed is displayed on a part of the character. When the completion display appears, when the ADJ key is pressed again to switch to the 0UTPUT display, the camera control value is displayed on the character display section (FIG. 18).

Next, the S mode (shutter speed priority mode) of the EXPO8URE7 mechanism will be explained.

Press the MODE key (7) to display “S” on the character display.
MODE'' display and select S mode, 15
It will be displayed as shown in Figure 1.9. Here, press the OPE key (
8), it is in the execution state.

(Fil, 4 and F22 are limited by the lens.) When you switch to the OUTPUT display using the ENT key (9), an underline will appear in the shutter speed value display section of the character display section (1G). (cursor) is displayed (Fig. 20). The underline is UF4-(
11) Or DOWN key (12) +: Indicates that the numerical value can be changed. i by UP key (11)
/ If you change from 125 seconds to 11500 seconds, it will look like Figure 21. At the same time, the aperture value also changes to the appropriate exposure value.

Next, the A mode (aperture priority mode) of the EXPOSUR,E7 angle will be explained. Press the MODE key (7) to display "AMODE" on the character display and select A mode.
The screen is displayed as shown in FIG. It is in the execution state by pressing the OPE key (8). Also, the camera allows 30 seconds (“
[l” display section) and 1/4000 seconds.

When the ENT key (9) is used to switch to the 0UTPUT display, an underline is displayed in the print position display section of the character display section (16), indicating that the numerical value can be changed (FIG. 23).

F5.6 to F i 1 +2 by UP key (11)
When changed to /4EV, it becomes as shown in Figure 24. At the same time, the shutter speed value also changes to the appropriate exposure value.

Next, the M monid (manual mode) of the EXPO8URE7 function will be explained. When the MODE key (7) is pressed, "M MODE" is displayed on the character display section (16) and the M mode is selected, a display as shown in FIG. 25 is displayed. It is in the execution state by pressing the OPE key (8). Additionally, the camera and lens impose restrictions on shutter speed and image blur. When the display is switched to 0UTPUT by pressing the ENT key (9), the display will become as shown in Fig. 26. At this time, an underline is displayed on the shutter speed value display section, indicating that the value can be changed (second
Figure 6). Press UP key (11) to 1, /250 seconds 1
/1o00 seconds Surtur, it becomes as shown in Figure 27. Next, use the cursor key (13) to move the underline (cursor) to the aperture display area (Fig. 28), and use the DOWN key (12) to change from F5.6 to F2.8 + 2/4EV, as shown in Fig. 29. Become.

When the cursor key (13) is operated again, the underline moves to the shutter speed value display section, and the shutter speed can be changed.

i! :Explain the long time mode of the EXPO3URE7 function. When the long time mode is selected by displaying "M'MODE/L, T" on the character display section by pressing the MODE key (7), the display as shown in FIG. 30 is displayed. It is in the execution state by pressing the OPE key (8). When the display is switched to 0UTPUT using the ENT key (9), the display will become as shown in FIG. 31. The underline is on the aperture display section, indicating that the fuzz value can be changed, but the cursor keys (13) are disabled, and the shutter speed 2-bead value (long time) cannot be changed in the 0UTPUT display. Can not. Next, press the ADJ key (10) to input
When the display is changed, the shutter speed value can be set as shown in FIG. 32. The shutter speed value (long time) can be set in a range of 10 seconds to 9990 seconds, and can be set in units of 10 seconds.

The underline is first set in the thousandth digit, then moves to the hundreds digit, the tens digit, the first digit, and then back to the tens digit.
UP key (11) or DOWN key (12) respectively.
) to change the numerical value (Figures 33 and 34). When setting of the shutter speed value (long time) is completed, switch to 0UTPUT display again by pressing the ADJ key (10).

Camera control values are displayed on the character display section (FIG. 35).

Next, the A and VERG E modes for performing the average calculation of the MULTI/M (multimetering) function will be explained. This MULTT.M function can be set using the FUNC key (6) when the EXPOSURE 7 function is in the execution state.

When the EXPO8URE7 function is in the execution state,
Select MULTI・M7R with the FUNC key (6), then display the mode name "AVERGE" on the character display section (16) with the MODE key (7), and set to AVERGE mode ( 36th
figure). Here, the mode of the EXPO3URE7 function is set to P mode according to the mode display. It is in execution mode with the OPE key (8), and the M key (14)
Now it is possible to import photometric values. -6 (E) indicating the controllable range at the top of the graphic display
Indices from V) to 6 (EV) are displayed on the LCD.

Further, on the left and right sides of the graphic display section, there are index displays ("-■") indicating the width of deviation during highlight calculation and shadow computation, and index displays ("■--■") indicating out of interlock.

The 1-point display ("■") located one step above the index in the middle is the first photometric point, and is normally located in the middle (0 position). When 0UTPUT is displayed using the ENT key (9), the shutter speed value and frit value calculated in the P mode (for example, P2 mode) of the EXPO3URE7 function are displayed on the character display section (16) using the first metering point. (Figure 37). At this time, "A" for "AVERGE" is displayed in the middle to indicate the AVERAGE mode.

Next, when you operate the M key, the first index one level above the above index will be displayed.
The value of the photometric point is taken in, and the one point display ("■") moves one step below the index display. At the same time, a second photometric point appears one step above the index display with respect to the first photometric point (FIG. 38). At this time, the value of the first photometry point that has been imported is in an AE-locked state, and the character display section (16) shows the value calculated in the mode selected by the EXPO3URE7 function (this time it is P2 mode). Displays the shutter speed value and aperture value. When you operate the M key (14) again, the value of the second metering point is imported, the first and second metering points move to a balanced state with respect to the 0 position reference, and the character after display shows the first and second metering points. The photometric point values of tjS2 are averaged, and then the shutter speed value and aperture value in P2 mode are calculated and displayed (FIG. 39). At this time as well, the third photometric point appears one step above the indicator display. Below, by sequentially operating the M key (14), it is possible to import and display photometric values up to 8 points, but from the 9th point onwards, it will be replaced with the 1st point, and the latest value will be displayed. It is possible to import and calculate 8 photometric points. FIG. 40 shows a state in which three photometric points have been taken in, and FIG. 41 shows a state in which the highest eight photometric points have been taken in. Here, press the MODE key (
7), the character display section (16) will change to 0U.
The TPUT display changes to the mode name display, and “CENTE”
R” is displayed. CENTER mode is the MAX photometric value.
In this mode, the average value and MIN value are calculated, and the MAX value and MIN of the photometry point taken in one shot from the index display are displayed on the graphic display section based on the zero position.
The points indicating the values move to balanced positions (Figure 42). Next, press the ENT key (9) to set 0UTPUT.
The character display section (16) displays the computed shutter speed value, fringe value, and CENTER between them.
Mode C" is displayed (FIG. 43). Pressing the MODE key (7) again changes to the HIGH LIGHT mode, and the mode name "HIGHL IGHT'' is displayed on the character display section. At the same time, the point display indicating the MAX value of the captured photometric point will be +2.3E.
The photometry point display is moved to the position v, and the entire photometry point display that has been taken in is moved based on the point display indicating the MAX value (FIG. 44). At this time, the number of photometric points protruding from minus 6 Ev is displayed at the minus 6 Ev position. Next, press the ENT key (9) to output 0UTPU.
T is displayed, and the shutter speed value, aperture value, and aperture calculated based on the highlight standard are displayed as HIGHLIGHT.
The mode "H" is displayed on the character display section (FIG. 45). Press the MODE key (7) again to set 5HAD.
Changes to OW mode, and “5HA” is added to the character expression.
A mode name display of "DOW" is shown.

At the same time, the point display indicating the MIN value of the photometric point captured moves to the -2.7Ev position, and the entire captured photometry point display moves based on the point display indicating the MTN value (the Figure 46). At this time, the photometric points that protrude beyond +6 Ev are displayed at the position of +6 Ev by that number. Next, by pressing the ENT key (9), 0UTPUT is displayed, and the shutter speed value and aperture value calculated based on the shadow reference, and "S" for 5HADOW mode, are displayed on the character display section (FIG. 47). Press the MODE key (7) again and again.
), the mode returns to AVERAGE mode and repeats in sequence. The MULTI/M function has one more mode in addition to the mode described above. EXPO3URE7 mechanism is M (manual) mode jJl, MULTI/M function is M
The mode becomes ANUAL mode, other modes do not appear, and the MODE key (7) becomes invalid. In the M A N U A L mode, the control value is only the set value of the EXPO8URE7γ function in the M mode, and the O position of the index display is the set value. Therefore, as shown in FIG. 49, the photometric value from the camera exists at a position that is shifted by the amount of shift from the set value. 0UT by ENT key (9)
The PUT display is displayed, and the character display section (16) shows the following:
The shutter speed value and fringe value, which are the set values, are displayed, and "M" is displayed above them (FIG. 50). O
Since it is in the execution state with the PE key, photometric points are taken in with the M key in the same way as in the other modes. FIG. 51 shows one, vJ52 shows two, and FIG. 53 shows eight. In these cases, the character display section (16) remains unchanged at the set value. As shown in FIG. 53, the photometric distribution for a certain subject can be determined at a glance using a graphic display. Here, by using the UP key (11) or the DOWN key (12), it is possible to move the entire photometric distribution map made up of the captured photometric points to the left or right. In FIG. 54, since there is an Angoo line in the shutter speed value representation area, the shutter speed value is changed at the same time as the photometric distribution map is moved by pressing the UP key (11). Therefore, this function makes it possible to perform exposure control according to the brightness distribution of the subject, and furthermore, it is possible to perform exposure control according to the brightness distribution of the subject.

The width of highlight and shadow exposures, which are fixed at 2.7Ev, can also be changed arbitrarily. Here, if the Angoo line is moved to the crest value using the cursor key, the crest value will be changed. In the above explanation, the most appropriate point on the photometric distribution map is selected by pressing the UP key (11) or the D
By arbitrarily changing the shutter speed value or aperture value using the OWN key (12), the index display can be set to 0.
You can move the camera to different positions and set the appropriate value for the subject at your own discretion. In other words, this MULTI・M7
In commonly known terms, the Anxion's MANUAL mode can be said to be a type of metered manual.

Next, the BRACKET function will be explained. This function performs photography by shifting the exposure value based on the captured photometric data. It is possible to shoot with a shift of up to 97 frames, and the start value, shift width, and number of frames can be set to suit your needs. This function is also skipped and cannot be selected if the EXPO3URE7 function is not in the execution state.

Figure 55 shows the state of mode name display,
The E7 action indicates that the L mode is selected, and an index indicating the shift start value and shift amount is displayed at the top of the graphic display section (24). This index is common to that indicating the photometric range of the MULTI/M function, but it is also possible to provide a different index. An index indicating the shift range is displayed on the graphic display section. Furthermore, the BRACKET7 function is in an unexecuted state. ENT key (9
), the display changes to 0UTPUT as shown in FIG. The character display section (16) displays the amount of deviation from the reference value and the remaining number of 7 frames. Also, OPE
It is in the execution state by pressing the key (8), and therefore, a new display showing the operating state of the BRACKET7 function appears below the indicator in the same shift range on the graphic display section (24). Next, when the ADJ key (10) is used to change the 0UTPUT display to the INPUT display, as shown in Figure 57, the character display section (16) first displays a message "FROM" to set the start value for the shift. ” appears. Here, press the UP key (11) or DOWN key (
When the value is changed to the desired value using step 12), the indicator and the operation display move as shown in FIG. 58 together with the key input. Next, press the ENT key (9) and the message "5TEP" for setting the shift width will appear on the character display (16).
(Figure 59). The shifting width is 1/4Ev.

It can be selected from four types: 1/2 Ev, I Ev, and 2 Ev, and is set by changing the underlined value using the UP key (11) or the DOWN key (12) (Fig. 60). Next, press the ENT key (12) to
As shown in Figure 1, the message "FRAME" appears on the character display section to set the number of frames to be photographed. U
By pressing the P key (11) or the DOW'N key (12),
Change and set the underlined numbers (
This time 97 reims) and in the graphic display section,
The width of the index and the operation display continuously displays the shift range from the start value of shift to the final value of shift (FIG. 62). Next, by pressing the ENT key (12), the message "COMPLETED" is displayed on the character display section (16), indicating that the setting is complete.

Now, if you operate the ENT key (12), the 'FR' button will appear again.
Return to "OM" and repeat each setting display. ADJ key (10)
As a result, the INPUT NPUT display changes to the TPUT display, and the character display section (16) displays the amount of deviation from the reference value and the remaining number of 7 frames (! @ Figure 64). Next, when you release the camera, the light metering value at that time will be locked, and the exposure value of each 7 frames will be shifted based on the light metering value in the mode selected by the EXPO8URE function, this time in P mode ( patP2
．． The camera is controlled by converting the shutter speed value and aperture value calculated in any mode of P3). FIG. 65 shows a state in which the camera has been released once, and the character display section (16) displays the amount of deviation of the exposure value controlled by the next release from the reference value and the number of remaining 7 frames. And the graphic display section (24)
In the above operation display, the next control (exposure) value to the final (
Exposure) changes to display the range up to the value.

FIG. 66 shows a state in which the camera has been released twice, and FIG. 67 shows a state in which the camera has been released eight times. The remaining number of 7 frames on the character display section (16) is “
1" to show that there are 17 frames remaining, and the graphic display section (24) only displays the final value.

Next, when you release the camera to take the last 7 frames you have set, the character display area (16) and graphic display area (24) will be reset to the initially set values, and the new values will be displayed again as shown in Figure 68. The state changes to a state in which photometric values can be taken in, the display state becomes the same as that shown in FIG. 64, and camera control can be performed repeatedly. When the BRACKET7 function is in the execution state, the display on the external display section (2) is set to EXPO3URE.
When changing to the 7y function and executing the BR'ACKET7 function, if the EXPO6URE7 function selects P, S, or A mode, the Ev line will move parallel to the program line in the graphic display section. and if you select M mode,
Since the threshold value lines move in parallel, BRAC
It can be easily confirmed that the KET7 function is being executed.

Next, the imprint function will be explained.

When the imprint function is selected by operating the FUNC key (6), the mode becomes an exposure control data imprinting mode, and when the OPE key (8) is operated, the mode becomes operational. If the exposure function is selected at this time, the line diagram and Ev line at that time will be displayed (Figure 69).
. When the ENT key (9) is pressed, the control value (camera control value) calculated by the back circuit (BCKC) at that time is displayed (FIG. 70) and this data is imprinted.

On the other hand, if no exposure function is selected, E
When the NT key (9) is pressed, data sent from the camera body (BD) is displayed as data to be imprinted.

In this case, no graphic display is performed.

Press the MODE key (7) to enter year/month/day mode.
The mode name is displayed on the character display section (16) (
Figure 71). Next, press the ENT key (9) and the data from the calendar microcomputer (CAMC) will be displayed (
Figure 72). If a photograph is taken in this state, the data of this character display section (16) will be imprinted. Also, tj
If the ADJ key (10) is pressed in the state shown in Fig. fJ72, data can be changed, and a cursor is displayed on the data display section for the year (Fig. 73).

Then, when you press the cursor key (13) twice, the cursor is displayed below the day data display area, and the UP key (13) in Figure 75 is displayed.
1) is pressed three times to change the day data from the 12th to the 15th. If the ADJ key (]0) is pressed in this state, the display state shown in FIG. 75 will be created and this data will be imprinted. Incidentally, imprinting is performed even in the display state shown in FIGS. 73 and 74. Also, if the calendar data is changed (
The display data (data from the calendar microcomputer (CAMC)) is also changed. Each time the MODE key (7) is pressed in this state, the imprint mode is changed in the order shown in Table 1, and the mode for hours, minutes, and seconds is changed, and then the MODE key (7) is pressed.
When the E key (7) is pressed, the up-count mode is entered. The mode name display state of this up count mode is 7th.
This is Figure 6. If you press the ENT key (9) in this state, the 7th
The display state shown in Figure 7 will be obtained. When the ADJ key (10) is pressed, a cursor appears and the data corresponding to the cursor position can be changed using the up key (11) and down key (12). O for up key (11)
→１→・・・・・・→9→−→Blank→0・・・・・・
・The down key (12) changes in the reverse order.

FIG. 79 shows a state in which the data change has been completed in this manner. If the ENT key (9) is pressed in this state, the cursor will move as shown in FIG. When photographing is performed in this state, the data incremented by "1" is sequentially imprinted. Note that there is no carry to - or blank digits. When the MODE key (7) is pressed in the up-count mode, the mode changes to the down-count mode, with the mode name displayed as shown in FIG. 81. The initial data is set in the same procedure as in the up-count mode, and the display at the end of the setting is shown in Fig. 82. In both of these modes, data that is sequentially changed and imprinted during photographing is displayed on the character display section (16).

When the MODE key (7) is pressed in the down count mode, the fixed data imprint mode is entered, resulting in the display state shown in FIG. 83. If you press ENT'1-(9) below, Fig. 84, A
When the D and J keys (10) are pressed, the display state shown in Fig. 85 is displayed, and when the cursor key (13), up key (11), and down key (12) are pressed in combination, the display shown in Figs. 86 and 87 is displayed. When the data is changed and the ENT key (9) is pressed, the state shown in FIG. 88 is obtained.

In this mode, the set fixed data will be imprinted unless the PE key (8) or MODE key (7) is operated.

When the B&W7 function is selected by the FUNC key (6), the imprinting time for monochrome film is controlled. With this function, mode switching etc. cannot be performed, and the setting state of the imprint function is maintained. When this function is selected, it is an imprinting function for monochrome film, and when the B&W function is not selected, it is an imprinting function for color film. Note that when the B&W77 function is selected, the imprint function may be disabled so that the same operation as the imprint function can be performed. When the B&W7 angle is selected, the imprinting time becomes longer.

Next, the INTERVAL function will be explained. This function allows the camera to be activated at certain time intervals to automatically take pictures in sequence. The interval function (herein, the interval time, the number of 7 frames at the time of each interval shooting (hereinafter referred to as the number of 7 frames), the number of repetitions of the interval (
(hereinafter referred to as the number of groups), the first release start time of interval shooting (hereinafter referred to as the start time)
can be set.

FIG. 89 shows the mode name display of the interval function. It is in a non-execution state, and the ENT key (9) is disabled. Further, the graphic display section (24) is in a non-display state in this function. When this interval function is put into an execution state by pressing the OPE key (8), execution starts toward the start time. Also, if you want to immediately execute the first Lurise of the interval, press the OPE key (8) to activate it, then release the camera to cancel the start time and start. . Next, press the ADJ key (10
), the 0UTPUT display changes to the INPUT display, and as shown in FIG. 90, a display state in which the interval time can be set is first entered. “■” for INTERVAL time is displayed on the character display section (16), and the hour, minute,
H (Hour)y M (M 1n
ute)yS (Second)'' are displayed together with the numerical value.

Also, the underline indicates where the numerical value can be changed,
Change the numerical value using the UP key (11) or DOWN key (12), and move the changed point using the cursor key (13) to set the interval time (Figure 91).The interval time is from 0 seconds to 99 hours and 59 minutes. It can be set up to 59 seconds. Next, press the ENT key (9) to
As shown in FIG. 92, the setting display changes to the number of 7 frames ("F") and the number of groups ("G"). Enter the underlined value using the UP key (11) or DOWN key (12).
) and move the changed part using the cursor keys (13) to set the number of 7 frames and the number of groups (Figure 93).
. The number of 7reims can be set up to a maximum of 97reims,
When the BRACKET7 function is in the execution state, priority is given to the number of 7 frames in the BRACKET7 function. Maximum number of groups is 99
Even groups can be set.

Next, by pressing the ENT key (9), the display changes to the start time setting display as shown in FIG. The start time can be set to any day, hour, or minute.

The character display section (16) shows “5TART time”.
"S" is displayed, and "D (
D ate), H (Hour) + M (M 1nu
te)" will be displayed together with the numerical value. Change the numerical value in the underlined part using the UP key (11) or DOWN key (12), move the changed part using the cursor keys, and set the start time. Next, press the ENT key (9
), the character display section (16) will show “
COMPLETED" display (figure omitted), then press the ADJ key (10) to change the I NPUT display back to the mode name display (Figure 95). As a result,
To start the interval function,
Press the OPE key (8) to enter the execution state, and press the ENT key (9).
) to display 0UTPUT, the start time is displayed on the character display section (16) as shown in FIG. After the first release of the interval is executed, the character display section (16) displays the remaining time until the next release in hours, minutes, and seconds ("H, M, S"). Figure 97).

FIG. 98 is a block diagram showing a specific example of the buck circuit (BCKC). (CM C) is a control microcomputer that manually sets functions, modes, and data, calculates exposure, creates display data, creates imprint data,
Controls the imprint operation.

Furthermore, display sections (S D ), (D D ), which will be described later,
(CD) control, calendar microcomputer (CAMC)
It also exchanges data with the display microcomputer (DMC) and the camera body (BD). (CAM
C) is a calendar microcomputer, which also controls calendaring data for imprinting, interval control, and long exposure time (long time).

Switch (M) is a switch that is closed by pressing the memory key (14) in Figure 5, switch (CL) is a switch that is closed by operating the memory clear key (15), and (CUR) is a cursor. A switch that is closed by operating the key (13), (ENT) is a switch that is closed by operating the enter key (9), (UP) is a switch that is closed by operating the enter key (9), and (UP) is an up key (11).
(DWN) is a switch that is closed when the Grankey (12) is operated. These six switches are connected to each input port of a control microcomputer (CMC), and are also connected to an interrupt terminal (INTB) via an AND circuit (AG). Therefore, even if the control microcomputer (CMC) has stopped operating, if any switch is turned ON, the control microcomputer (CMC)
C) starts the operation. In addition, the switch (OPE) is
A switch that closes in conjunction with the operation of the operation key (8), (FUN) is a switch that closes in conjunction with the operation of the function key (6), (AD, J) is a switch that closes in conjunction with the operation of the function key (6). A switch that is closed in conjunction with (M
OD) is a switch that is closed in conjunction with the operation of the mode key (7). These four switches are connected only to the input ports of the control microcomputer (CMC), so even if these switches are turned "ON", the control microcomputer (CMC) is not activated.

Next, the operation of the control microcomputer (CMC) will be explained based on the chart 70 of the control microcomputer (CMC) shown in FIG. First, from the camera body (BD) to the signal line (C3
When B) falls to “Low”, the interrupt terminal (INTA)
The operation starts from step No, O. First, since the camera has been started, the signal line (B S +) is closed to "High", then the interrupt operation by the interrupt terminal (INTA) is enabled, and then the interrupt operation from the camera body (BD) is determined at what timing. Determine whether a signal is input. That is, N
In step o and step 2, it is determined whether the state is waiting for data input or not. If the state is waiting for data input, the imprint data (Tv) is determined.

Av) has been input, or whether calculation data has been input is determined in step N013. As mentioned above, when the signal line (C3B) falls to "Lou+", the signal line (BIO) becomes "High" for calculation data, and "LoIll" for imprint data.
It can be identified because it is . Then, when it is determined that imprint data is input, the sent data is read ('), and it is determined in the No. 5 =95- step whether or not the wrap-around function is selected. If it is determined in step No. 5 that the imprinting movement 7 has not been selected, the process moves to step No. 15 without performing the rotation operation. On the other hand, if the wrap-around function is selected, the process moves to step 6 (No) and sends data corresponding to the selected wrap-around mode to the LED drive circuit (LDR) for projection. This operation is done by sending a synchronization signal to the signal line (CSLD),
Data is sent sequentially in 4-bit increments. Then, when the signal line (LDEN) is set to "Lour" and the display operation of the drive circuit (LDR) is activated, the light emitting diodes (LED) of the segment are dynamically driven according to the wrap-around data, and imaging is performed. . Then, the control microcomputer (CMC) counts the time according to the film sensitivity read from the camera body. In addition, B&
When using the W77 function, even if the read film sensitivity is the same data as the wrap-around function, a different (good) time count is performed.

When the count ends, the signal line (LDEN)
is set to "High" to stop the imaging operation by the drive circuit (LDR). In addition, when the rear curtain starts running on the camera body (BD), a “Lo
ur" pulse is output. Then, at this time as well, an interrupt signal is input to the interrupt terminal (INTA), and since it is not waiting for data input at this time, the process moves to step 11. If it is determined in step 11 that the turning operation is in progress, the answer is No, and the process moves to step 10.
The signal line (LDEN) is set to ``High'' to forcibly stop the winding operation.This prohibits the winding operation from being performed even while the film is being wound.No.

In step 15, press the switch (SCN) on the camera body.
It is determined whether it is “ON” or not. and switch (SCN
) is "ON", No, steps 16 to 21 are not performed, and No, the process moves to step 40.

On the other hand, if the switch (SCN) is “OFF”, then
Determine whether count up mode is on. If it is the count-up mode, "1" is added to the reno star CR in which the loop data is set, and the process moves to step No. 40.

On the other hand, if the mode is not the count-up mode, it is then determined whether the mode is the count-down mode. Then, in countdown mode, subtract “1” from the contents of register CR,
No, proceed to step 40.

On the other hand, if it is not the countdown mode, then it is determined whether it is a bracket function or not, and if it is a bracket function, "1" is subtracted from the register BR in which the number of frames of the bracket function is set, and the number is 4.
If it is not a bracket function, go to step 0 and go to step 40. Note that data looping is performed even when the switch (SCN) is "ON", but the switch (SCN) is determined between steps N004 and No.5, and the switch (SCN) is set to "ON". If it is "ON", the process may immediately proceed to step 40 (No).

No, step 3 indicates that the data is not looped (signal line (
BIO) is “High”), N
o, the process moves to step 25, and data is read from the camera body. If the exposure function is selected, the process moves to step 27 and waits for the signal line (BIO) to become "LOIll". Then, when the signal line (BIO) becomes "LOu1", back ICP ("80H") is output. Camera body (B
D) is the signal line (BI
O) is set to “High” and the signal line (C3B) is set to “L”.
ou+'', wait for the control microcomputer (CMC) to perform the calculation, and when enough time has passed for the calculation to be performed, set the signal line (BIO) to "LOIll".The control microcomputer (CMC): No. At step 28, the back TCP is output and the exposure calculation subroutine is operated.When the calculation operation is completed, the signal line (B
IO) waits for it to become "Lou+", and when it becomes "Low", it sends the aforementioned control data (Tv+Av), exposure control mode, out of linkage, release enabled/disabled, etc. No. 4
Move to step 0.

When the control microcomputer (CMC) is activated by a pulse output to the signal line (C3B) when the camera body (BD) starts operating, or when a pulse is input when the trailing curtain starts running. In this case, if it is not a wrap-around function or if the imprinting operation has been completed, the process immediately moves to step 40 (No). Switches (M), (CL).

(CUR)t(ENT)t(UP), (DWN) is “O
When the interrupt signal is input to the interrupt terminal (INTB) or the operation due to the interrupt from the interrupt terminal (INTA) is completed, the operation starts from step 40.

In step No. 40, the timer register (for counting operating time) TIR is reset, and the flag IOF, which determines whether data is input or output from the calendar microcomputer (CAMC), is set to "1". Move to step. No, in step 42 flag IOF
Determines whether or not is “0”, and if it is “1”, reads the data from the calendar microcomputer (CAMC) and outputs the flag IO.
F is reset to "0" and the process moves to step 47. On the other hand, if the flag IOF is 1″, No, 4
When it is determined in step 2, the data is sent to the calendar microcomputer (CAMC) and the flag I OFt! -1”
Set it to No, and move to step 47. The data transfer method is to set the signal line (C3CA) to "Low", and when outputting data, set the signal line (Ilo) to "Low".
When inputting data to LoI11'', use the signal line (
Ilo) is set to “High”. Signal line (CS C
A) becomes “Low”, the calendar microcomputer (CA
MC) is interrupted and the calendar microcomputer (CA) is interrupted.
MC) outputs a pulse for data exchange synchronization. In synchronization with this pulse, 4-bit data is sequentially exchanged via the data bus (DBUSI). The data sent from the calendar microcomputer (CAMC) to the control microcomputer (CMC) is from 1:01:1 on January 9, 2018 to the time 9:00 until the start of the next shooting operation for interval shooting.
minutes, 9 seconds, and whether interval shooting is in operation.
There is data indicating whether or not interval shooting has ended. Therefore, the control microcomputer (CMC) creates imprint data based on these data, and also creates data for displaying the remaining time until the start of the next shooting operation during the interval function, and furthermore, when the interval end signal is input. This will cancel the interval function. In addition, the data sent from the control microcomputer (CMC) to the calendaring microcomputer (CAMC) includes the start date, hour, and minute of interval shooting, the time indicating the interval of interval shooting,
Minutes, seconds, number of groups for interval shooting, number of 7 frames for interval shooting, exposure time setting in M/LT mode Y,
There is data such as whether the interval function is selected and whether the M/LT mode is selected.

No, in step 47 switch (M) ~ (MOD)
to determine whether a key operation is being performed. If no key operation is performed, the process immediately moves to step 50 (No). On the other hand, if a key operation has been performed, the operation is performed according to the states of the switches (M) to (MOD) and the state of the control microcomputer at that time, and the answer is No.

In step 49, the signal line (Bs1) is set to "Low" to start the camera body, and the process moves to step 50. This No. 48 subroutine is the 103rd, 1st subroutine.
．． 04, and the specific operations will be omitted since the relationships between the operations of each key, setting data, and display have already been described.

No. 48 step subroutine and no.

When the operation of step 49 is completed, the interrupt terminal (INTA
) and sends display data to the display microcontroller (DMC). In this operation, first, the signal line (DE N ) is set to "Loud" and the display section (S
D ), (D D ), and (CD ) are in the operating state,
Next, set the signal line (C8DM) to "Loud" to notify the display microphone/(DMC) that data will be output, and output a synchronization pulse from the signal line (DCK2) to output the data 4 bits at a time. send. Data sent and display according to each function and mode will be described later based on the operation of the display microcomputer (DMC). In addition,
In the figure, the enable terminal is used, but when the word line (DEN) becomes "Loud", power is supplied to the display sections (SD), (CD), and (DD). It has become.

When the data transfer is completed, it is determined in step 52 whether any of the switches (M) to (MOD) is turned on, and if it is turned on, the register TIR is reset. If none of the switches are turned on, add "1" to the contents of register TIR,
No, proceed to step 55. Then, in step 55, it is determined that the contents of the register TIR have reached a certain value "K", and if it has not reached "K", the answer is No.
, 42, and repeat the same operation. And no.

When it is determined that the contents of the register TIR have reached "K" in step 55, it means that a certain period of time has passed since no key operations or data exchange with the camera body (BD) has been performed. Time signal line (D E
N) is set to I(high'') to stop the operation of the display section, and the operation is stopped while enabling operation by an interrupt signal to the interrupt terminal (INTB).

FIG. 100 is a flowchart showing a specific example of the calculation subroutine No. 29 in FIG. 99. First, it is determined whether bracket 7 angkunyong is selected, and if it is not selected, the A7 lag is reset, and if it is selected, it is determined whether or not the bracket function is operating, and if it is not operating. Set the A7 lug. After resetting or setting the A7 lag, the Ev value is calculated using data from the camera body (BD).

On the other hand, if the bracket function is in operation, the Ev value determined at the start of the operation is not changed, so the process moves to the bracket calculation operation.

Once the current Ev value is determined, the meter (MET
) has been imported, and if it has been imported, it is set as an external function and the meter (ME
The data from T ) is used as the control value. Note that when the control limit is set, the limit value is used as the control value in the same way as the calculation in the camera body (BD). If there is no data from the meter (M ET ), then it is determined whether the mode is M or M/LT, and if it is in this mode, the manually set Tv, A, and v are output. On the other hand, if it is not M, M/LT mode, it is determined whether the multi-function is selected next, and if the multi-function is selected, ν1 is I! A control Ev value is calculated based on the stored Ev value.

A subroutine for this multi-function calculation is shown in FIG. When in center mode, the maximum E vI6ax and minimum E of the stored Ev values
Find vmin and from these two values (E vmax+E
vmin)/2 to find the control Ev. If it is not the center, it is determined whether it is in the F mode or not, and if it is in the F mode, the control Ev is calculated by calculating E vmax -2, 3 on the stored maximum value of Ev. If it is not light mode, then it is determined whether it is shadow mode or not, and if it is shadow mode, E vmin is set to the minimum value Evmin of the stored Ev.
+2 and 7 are performed to calculate 1 and control Ev. If it is not the shadow mode, it is the average mode, and in this case, the calculation is performed to calculate the control Ev.

In FIG. 100, when the multifunction is not selected, the Ev from the camera is set as the control Ev.

Then, based on the control Ev found, P I=P 2
．． P Performs calculations according to whichever mode is selected among the 5tA-S modes. A specific example of this calculation subroutine is shown in FIG. This calculation is first performed as follows: E vmax (= T vLIlax + A vmax
) < E v*E vIIlin (= T vmin
+A vmin) > E v, the control is out of control, so the limit value is set as the control value, the out of interlock flag is set, and the process returns to the main routine.

On the other hand, when the interlock is in effect, operations are performed in accordance with the order shown in the flowchart, a control value is calculated, the out-of-interlock flag is reset, and the process returns to the main routine (FIG. 100). In addition, in the camera body (BD), when the calculated value exceeds the control limit, the limit value is used as the calculated value and the set value is output as is, but in the back circuit, the limit value is used as the set value, and then Ev The set value is changed by recalculating from the limit value. Also, when in program mode,
It is now possible to set the limit aperture value (not the maximum aperture value or the maximum aperture value).

When the control Tv and Av are determined, it is determined whether the flag A is set to 1'', and if it is set to 1'', the bracket function is selected and no calculation is performed, and the bracket calculation is performed. Move to action.

Further, even while the bracketing function is in operation, the process shifts to bracketing calculation for the next photographing. First, M, M/L
It is determined whether the mode is T mode or not, and if the mode is M or M/LT mode, the aperture value is moved by the number of frames of the shift amount (the number of times of next shooting) and the A7 lag is reset.

On the other hand, in the P+tP 2tP:++AtS mode, Ev is moved by the number of frames corresponding to the amount of shift, the A7 lag is reset, and the process moves to the calculation subroutine for Tv and Av. When Tv and Av are calculated in this way, the bracket function is selected, shooting for the set number of frames is completed, and the signal line (B S 2) becomes “Lou+
Then, if it is "Lou+", the release disable signal is set so that the shooting operation will not be performed, and if the above conditions are not met, the release disable signal is reset. and return to the main routine.

FIG. 105 is a flowchart showing the operation of the calendar microcomputer (CAMC). First, when the signal line (IP) of the camera body (BD) starts the exposure control operation, “Lou+
'', the interrupt operation by the interrupt terminal (INTA) starts. Then, in step STI, the timer interrupt (l
sec) and moves to Sr2. In step ST2, it is determined whether the switch (SCN) is "ON", and if it is "ON", the interval and M/LT operations are not performed and step 5T20
to move to. On the other hand, if the switch (SCN) is "OFF", it is determined whether or not interval photography is being performed, and if it is not interval photography, then it is determined whether or not M/LT mode is being used.

In M/LT mode, the signal line (B S 2
) is set to "Low", and if it is not the M/LT mode, the process directly proceeds to step 5T20.

When it is determined in step Sr1 that it is interval photography, the remaining time until the start of interval photography is reset, and the signal line (B S 2) is set to "LOLI+". And register I where the number of frames is set.
“1” is subtracted from FR, and the contents of register IFR become “0”.
If the content of the register IFR is 0, then "1" is subtracted from the register IGR in which the number of groups is set.
Determine whether the value has become "0". Then, if it is "0", set the interval end signal and set it to "0".
If not, set the remaining time. And M/L
Determines whether it is in T mode, and if it is not in M/LT mode, sets the signal line (BS2) to High,
In M/LT mode, the signal line (BS2) is “
The process moves to step 5T20 while leaving the value "Lou+" as it is.

Then, interrupts to the interrupt terminals (TNTA) and (INTB) are enabled, and it is determined whether the flag TIF is "1". If the 7-lag TIF is "1", it means that a timer interrupt has occurred during this operation, and the TIF is reset to "θ" and the operation proceeds from step 5T45. On the other hand, if the 7-lag TIF is "0", the operation is stopped.

When the control microcomputer (CMC') sets the signal line (C3CA) to LoIII'' for data exchange, the calendar microcomputer (CAMC) connects the interrupt terminal (INT) from Sr15.
Perform the operation according to B). Sr15 enables a timer interrupt, and then determines whether to output or input data by determining the state of the signal line (Ilo). If data is input, the control microcomputer (C
Read data from MC). Then, if M/LT mode is selected and M/LT mode is not in operation, set the exposure time data, and if M/LT mode is not selected or counting is in progress in M/LT mode, leave it at 5.
The process moves to step T30. In step 5T30, it is determined whether the interval function has been selected and is in an operating state. If the interval function is not selected or is in operation, leave it as is, 5T2
Move to step 0. On the other hand, if the interval function is selected and the operation has not started, set the number of frames in the register IFR, the number of groups in IGR, the time interval between groups (remaining time), and the start time, and then press 5T20. Move to the next step. When it is determined in step Sr16 that data is to be output, the aforementioned data is sent to the control microcomputer (CMC) and the process moves to step 5T20.

When the timer interrupt occurs every second, step ST4.
Starts operation from O, interrupt terminal (INTA), (I
NTB), the 7-lag TIF is set to "1" and the operation returns to 70-, which was the previous operation. On the other hand, if such operations are not carried out or those (INTA)
, (INTB) are completed, the operation starts from step 5T45. In step ST4.5, the calendar is rewritten by increments of 1 second.

Then, it is determined whether the M/LT mode is operating, and if it is, "1" is subtracted from the set seconds (Tv timer), and it is determined whether the Tv timer has reached 0. ”, proceed directly to step 5T62 (INTA).

(INTB), enables timer interrupts and stops operation. On the other hand, if the content of the Tv timer is "O" in step 5T48, the signal line CB S2) is set to Hi.
gb", the camera body (BD) starts running the trailing curtain, and moves to step 5T62.

If it is determined in step 5T46 that the M/LT mode is not in operation, then it is determined whether or not an interval photographing operation is being performed. Then, if it is not interval photography, the signal line (BS2) is set to "High" and the process moves to step 5T62.

This is because the operation key (8) may be operated while the M/LT mode or interval function is in operation, resulting in a non-operation (stopping of operation) state. In this case, M/LT sets the signal line (BS2) to "High" to stop the interval, and stops the exposure control operation of the camera.

When it is determined in step Sr15 that the interval function is selected, the process moves to step 5T56, where it is determined whether it is 1 minute before the start of one group shooting, and if it is 1 minute before, the signal line (13S+) is selected. “Lo
W" pulse is output to start the camera body (BD) and start the external pressure operation of the flash device (FL). In this case, the signal line (BS2) is
h" is output, the time until the start is calculated and the process moves to step 5T62. On the other hand, if it is determined in step 5T56 that it is not one minute in advance, then the start time of one group's shooting is set. If the start time has been reached, the signal line (B S2
) as "Lou+" and proceed to step 5T62. On the other hand, before or after the start, it is determined whether "Low" is output to the signal line (BS2), and if "LoIII" is output, one group is in the shooting operation. Immediately move to step 5T62. On the other hand, “High” is applied to the signal line (BS2).
If h'' is output, it is before the start of the interval shooting operation or between groups, and in this case, the remaining time until the start is calculated and the process moves to step 5T62.

Next, display microcontroller (DMC), LCD segment driver (SD), LCD common driver (CD), LC
D drive reference power supply (DD), liquid crystal display section (LCD)
A graphic display block composed of is explained below. First, the control microcomputer (CMC)
Based on the transfer lock (DCK2), the data (4 bits) shown in Table 2 is transferred to the display microcontroller (DMC) via the data bus (DBUS2).
MC) is converted into data for graphic display, and then sent to the LC.
It is serially transferred to the D segment driver (SD).

LCD segment driver (SD) is RA for LCD display.
1 bit of data in this LCD display RAM corresponds to lighting/non-lighting of 1 dot on the liquid crystal display (LCD). Data for graphic display is L
After being transferred to the CD segment driver (SD), the LC
The LCD segment drive signal (SGT) stored in the D display RAM and corresponding to the contents of the LCD display RAM is sent to the LC.
From the D segment driver (SD) to the liquid crystal display section (LC
D). The LCD common driver (CD) uses a built-in oscillator to generate timing signals necessary for display.
Further, an LCD common scanning signal (CM, T) for automatically scanning the common signal of the liquid crystal display section (LCD) according to the display duty is output to the liquid crystal display section (LCD).

The LCD segment drive signal (SGT) and the LCD common scanning signal (CM T ) are transmitted through the LCD common driver (C
Synchronization is achieved by a synchronization signal (HS) supplied from the LCD segment driver (SD) to the LCD segment driver (SD).

The liquid crystal display section (LCD) performs dot matrix graphic display using these two signals, namely, the LCD segment drive signal (SGT) and the LCD common scanning signal (CM T ). Reference voltage for LCD drive I (
DD) provides a stable power supply (VDP) for driving the liquid crystal display (LCD) to the LCD segment driver (SD) and LCD common driver (CD).
).

The above is an outline of the operation until a graphic pattern is displayed on the liquid crystal display (LCD) based on data from the control microcomputer (CMC). Below is a 70-chart of the display microcomputer (DMC). A more detailed explanation will be given with reference to the following.

First, from the control microcomputer (CMC) to the display microcomputer (D
The display microcomputer (DMC) starts its operation by the signal line (DE N ) to the MC), and starts supplying power to the display microcomputer (DMC), thereby starting the reset routine shown in FIG. 106 (step 2). In step ■ L CD
Initialize the segment driver (SD) and display the liquid crystal display (
LCD) is turned off (all lights off).

At step (2), it is determined whether or not the full lighting mode is set, and normally the system enters an interrupt standby state at step (2). This determination of whether or not it is in full lighting mode is for a disconnection test at the factory.When in full lighting mode, all lighting data should be output to the LCD segment driver (SD). Turn on the LCD (LCD) and stop the system clock in step ①. If it is not the normal mode, that is, the full lighting mode, it enters the interrupt standby state in step ■.
Wait for an interrupt from the control microcomputer (CMC). The imprint routine shown in FIG. 107 is a routine for setting 7 lags for displaying an imprinting indicator ("IMF") for a certain period of time during imprinting. Start step by the imprint signal (Ip) from the camera (■)
, the register is saved in step ■, and the “IM” is saved in step [phase].
After setting the "F" display flag, the register is restored in step (2), and the original main routine is returned in step (2).

Figure 108 Main routine is performed by the control microcomputer (CMC)
A signal (C3DM) is sent to the display microcomputer (DMC) from the display microcomputer (DMC) to start the start (step ■), and in step ■, the restart of the main routine is prohibited until all processing within the display microcomputer (DMC) is completed, and step ■ Table 2
The transfer data from the control microcomputer (CMC) shown in is input, and the power supply voltage is checked in step [stock]. If the power supply voltage is below a predetermined value, the power supply voltage check flag (B, C, 7) is set in step O. rug).

In steps (2) to (e), the data transferred from the control microcomputer (CMC) is decoded into graphic display data.

This decoding is first performed on the character display section (16) (step ■), and the mode name display, INPUT
It is converted into graphic display data corresponding to each display content such as display, 0UTPUT display, etc., and this data is output to the LCD segment driver (SD).
It is written to the LCD display RAM in this LCD segment driver (SD) (step 0). Subsequently, the indicator indicating the control range and the Mo Y display section (18) are displayed in step [
phase] and output to the LCD segment driver (SD) (of the step).

Next, the index (22) indicating the shutter speed value, the finger [(23) indicating the aperture value, and the symbol (21) indicating that each function is in the execution state are decoded into graphic display data (step ◎). In step O, test the B, C, flags determined in step [stock],
If the B, C, flags are set, the battery check display (B, C,
, display) is displayed (step Q).

-1,19- If the B, C, and 7 lags are not set, depending on which function is selected on the external display, the calculation corresponding to that function is performed in step O, and furthermore, this function itself The index (20) indicating the above is decoded (Step O), and these graphic display data are output to the LCD segment driver (SD) in Step ◎. Here, the calculation according to the function in step O will be explained in detail.

When the exposure function is selected first, in order to draw the Ev line (25), the appropriate aperture value for each shutter speed value is determined while sequentially changing the shutter speed value. After that, exposure mode (P,, P2.P3.S, A.

M, M/LT), set the setting line (26) to the 109th
Draw according to the steps from Figure to Figure 114. P,,P2. P
.

When the mode is selected, in Fig. 109, the minimum aperture value of the lens Av+nax, the maximum aperture value of the lens Avmin, the setting limit value Avn for the lens fine pattern side, the setting limit value AV+ll for the lens maximum aperture side, selection. Assuming that the slope is Avp, Avy is drawn while changing Tvx according to the procedure shown in Figure #110. To explain briefly, first, in step 2, Tvx is set to -0, 5, and in step 2, a line segment 2 is drawn, and then, while TVX is incremented, line segments 2 to 2 are drawn (steps 2 to 2). Finally T
Draw a line ■ as vx=T v+nax (step ■). Setting line in P +tP 2-P 3 mode,
The calculations in Figure 6-(26) are as above, but %Pl and P
The Avp line in the 3 mode, Fig. 109 - line segment 2, has a slope of 221 and 1:2, so if drawn in the same way as the P2 mode, the slope becomes step-like and difficult to understand. Therefore, in the P and P3 modes, this point has been devised so that the points ('l'' VX + A vy) obtained by calculation are lined up on a - straight line (see Figure 6.8). Figure 111 shows the S mode. This shows how to draw the setting line, and Tvn is the setting line speed.
While incrementing A vy= A v+nin
Draw a line (line segment ■), then draw a line (line segment ■) of Tvx = Tvn, draw a line segment ■ as T vx = T vn (step ■), and finally increment Tv again. While Avy=A vmax line (line segment ■
). FIG. 112 shows how to draw a setting line in A mode, and Avn is the setting aperture value. In steps ■ to ■, set Tvx = -0, 5, draw a line segment ■, and increment Tvx in step ■, Avy = Av.
n line (line segment ■) with step ■ T vx = T
Set vmax and draw a line segment ■. Figure 113 shows how to draw a setting line in M mode.
= Avn line (line segment ■) with step ■ T vx
=Tvn, draw a line (line segment ■) from Ayy=AvIIlin to Avy=Avmax. Here, A Vnt T vn are the set aperture value and the set shutter speed value, respectively.

Figure 114 shows how to draw a setting line in M/LT mode, setting Tvx = -0,5 in steps
= A line from A vmin to A vy = A vmax (line segment ■), while incrementing Tvx in step ■, line A vy = A vn (line segment ■)
). Furthermore, the setting line in M/LT mode can be drawn using the same procedure as in M mode. The above is the calculation method of the graphic display unit in the exposure function.

Next, the calculations of the graphic display unit when the multi-7 function is selected on the external display will be described. At this time, the index from -6 to +6 (hereinafter abbreviated as ΔEvx) indicating the range from the control has already been decoded in step [phase] in FIG. 108 so that the liquid crystal display (LCD) lights up. Further, the finger F (22) indicating the shutter speed value and the index (23) indicating the aperture value are decoded so as to be turned off. In Table 4, the automatically controlled Ev value is Eve, the Ev currently being measured is Evo,
When the number of stored data is n, the point P is currently being photometered in step ① in Fig. 115. (ΔEVO% yo), then line L. Plot (step ■)
. Point Pn (ΔEvn, y+o
). However, 1≦n≦8, 2≦■≦9. This situation is shown in FIG. 115 as a 70-chart. The above is the method for displaying the graphic display unit in the multi-function.

Next, the operation of the graphic display section when the bracket function is selected on the external display will be explained. Indicator indicating the amount of deviation from proper exposure -6 to +6
As with the multifunction, step [
phase] is decoded so that the liquid crystal display (LCD) lights up.

In Table 4, the current point is ΔEvCONT, and the setting start point is △
If EvSET, then in step ■ in Figure 116, ΔE
Find vIIlax, and in step ■, ΔEvx = ΔEvS
The line from ET to ΔEvx=ΔE vmax (LS
ET), and in step ■, ΔEvx=△EvCONT
The line from ΔEvx = ΔEvmax (LCONT
). The above is the calculation method of the graphic display section of the bracket function.

As described above, when the calculations on the graphic display section are completed, the process proceeds to step e in FIG. 108, where a symbol (
20) is decoded, and the decoding result at step O is
LCD at step ◎ along with the calculation result at step O
Output to the segment driver (SD). Step O
-O tests the “IMF” flag indicating that it is being imprinted, and if it is set, the “IMF” flag is displayed on the subcharacter.
" is decoded and output to the LCD segment driver (SD).

In this way, when all the graphic display data is decoded and serially transferred to the LCD segment driver (SD), the liquid crystal display (LCD) is turned on (step e, the display microcontroller (DMC) Processing 1
End the loop. After that, it enters a standby state for an interrupt signal (C3DM) from the control microcomputer (CMC), and when an interrupt signal (C8DM) is sent again, the display microcomputer (CMC) waits for an interrupt signal (C3DM).
DMC) starts the main routine again and enters the processing for the next graphic display from the above-mentioned step [phase].

As described above, a graphic pattern is displayed on the liquid crystal display (LCD) in accordance with data sent from the control microcomputer (CMC) to the display microcomputer (DMC).

In addition, in the buck circuit (BCKC) shown in FIG. 98, power is supplied to the karengaifun from two 3-volt power batteries (B), and the control and display microcomputer (CMC),
(DMC) is powered by four 6-volt power batteries (A). Then, the display microcomputer (DMC) performs a battery check (Step ■ in Figure 108 checks both (A) and (B) power batteries. If the power battery in (A) is not working, As shown in Figure 117, the symbol (A) and four batteries are displayed on the graphic display section (24), and if the power supply battery in (B) is not working! @ As shown in Figure 118, the symbol (B) is displayed. and two batteries are displayed.

Here, the line with the slope in P1 mode (Fig. 109A
To explain how to draw the shutter
The way to display a line with a slope of speed value: aperture value = 1:2 is as shown in Figure 119 (a), (+3),
There are three possibilities (C). That is, in this embodiment, the minimum display step of the liquid crystal display (LCD) is 0.5 Ev steps in both the shutter speed direction and the aperture direction, so a point is always displayed every 0.5 Ev step of the fringe value. Then, it can be displayed as shown in FIG. 119 (a) or (+3). The difference between FIG. 119(a) and FIG. 119(1) is due to the rounding of the shutter speed value and aperture value during display.

When displayed in this way, it is extremely difficult to understand the slope of 1:2 between shutter speed value and fringe value in p1 mode. Therefore, in this embodiment, only the points for each iEv step of the threshold value are displayed, as shown in FIG. 119(c).
The points in between are not displayed. This results in
The slope of the fringe value with respect to the shutter speed value is clear.

In the P3 mode, the display as shown in FIG. 8 is displayed for exactly the same reason.

Next, how to draw the Ev line (25) will be explained. In this embodiment, the display range of the liquid crystal display (LCD) is determined by the shutter speed value Tv≦11. The print value is Av≧0
．． 5, but for Tv≦-0,5 and Av≧9.5, both are represented by the index "[1",'='', so it is not accurate.Therefore, the Ev line is Tv≦-0,5.
and 11≧Tv≧0.0 without displaying when Av≧9.5
．． Only the range of 5≦Av<9.5 is displayed. However, the setting line (26) is Tv≦11. It is displayed in the range of Av≧0.5. By doing this, the setting line (2
6) and the Ev line (25), the control point is the intersection of shutter speed value 11≧Tv≧0. Aperture value 0
．． Only the accurate range of 5≦Av≦9.5 is displayed. Ev
FIG. 120 shows a specific way to draw the line. In this figure, first, in step ■, T vx=O(15ec
), and in step ■ A'VV: EV -
Find T vx. However, Ev is the data N in Table 2.
o.

This is an automatically controlled Ev value of 14 to 15 and is a value sent from the control microcomputer (CMC). 0 at step ■
．． Determine whether 5≦Avy<9.5 (1, 2≦F<27) and if it is within this range, it is a point) (Tvx.

A, vy) should be plotted in Step 2), and if it is outside the range, it is not plotted. In step ■, Tvx is incremented by IEv step, and in step ■, T VX>T
Determine v+nax (T v = 1-1), and if No, return to step (2) and repeat steps (2) to (2) below. And YES, that is, T v > T v + nax
When this happens, proceed to step (■) and end the process. In addition, Tv
The step of incrementing x may be 0.5Ev step.

In Figure 1, the control microcomputer (
BMC) is the serial input/output terminal (S OU )t(S
All remaining circuits (flash unit (FL), receiver (RFC), display unit (DSP), lens circuit (LEC), AF circuit (A
FC), back circuit (BCKC), A-D.

It exchanges data with the DA conversion circuit (ADA). Therefore, by monitoring this serial input/output terminal while the system is operating, checking the data read from the monitor, and comparing it with the operation of the camera system, you can determine whether or not the system is operating normally. Can be checked. Therefore, this series input/output terminal (Sou),
(S I N) and (SCK) are exposed from the camera body (BD) to the terminals (T I), (T 2), (T 3) for the back circuit (BCKC) and the lens circuit. (
LEC) terminals (T11)-(TI2)-(T,
, ). The terminal that has all the terminals is the back circuit (BCKC) terminal (T 1 ).

(T 2 ), (T 3 ), so the back circuit (BC
A checker can be attached to the position of KC).

Then, from the checker side, the microcomputer (BMC) outputs a "Lou+" signal whose impedance is lower than the "Higl+" signal output to the signal line (C8B), forcing the signal line (C8B) to "Lou+". '', the gate circuit (G2) is always active, so you can check data exchange with circuits other than the back circuit (BCKC).Also, when checking the back circuit (BCKC), the lens circuit (LEC) ) terminal (T I2), (
T I3) makes it possible to some extent.

As mentioned above, according to the present invention, the photometric data stored for each manual operation is displayed in a frequency distribution manner on a two-dimensional coordinate display means on a relative scale as the amount of deviation from the exposure control data. As a result, the distribution of each photometric data can be displayed with a relatively narrow scale width compared to the case where the brightness is displayed on an absolute scale. Furthermore, since the photometric data currently being measured is displayed at a position different from the frequency distribution with respect to this relative scale, the relationship between the data being photometered and the stored data distribution can be easily recognized.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the entire camera system to which this invention is applied, Figs. 2 and 3 are flow charts showing the operation of the microcomputer (BMC) of the camera body (BD), and Figs. 4 and 5 are the back External view of (BCK), Figures 6 to 8
The figures are diagrams showing display examples of the display section (2), figures 9 to 35.
The figure shows the relationship between key operation and display in the exposure function, Figures 36 to 54 show the relationship between key operation and display in multifunction, and Figures 55 to 68
The figure shows the relationship between key operations, photographing operations, and display in the bracket function. Figures 69 to 88 show the relationship between key operations and display in the imprint function. Figures 89 to 97 show the relationship between key operations and display in the imprint function. A diagram showing the relationship between key operations, shooting operations, and display in the interval function,
Figure 98 is a block diagram showing the entire buck circuit (BCKC), and Figures 99 to 104 are control microcomputer (CMC).
), FIG. 105 is a flowchart showing the operation of the calendar microcomputer (CAMC), and FIGS. 106 to 108 are the display microcomputer (DMC).
Flowchart showing the operation of C), Fig. 109, Fig. 11
Figure 0 is a diagram showing how to display program lines in P mode, Figures 111 to MIJ114 are S, A, M,
Figure 115 shows how to display program lines in M/LT mode, Figure 115 shows how to display them in multi-function, Figure 116 shows how to display them in bracket function, Figures 117 and 118 119 is a diagram showing an example of display in P1 mode, and FIG. 120 is a flowchart showing a method of displaying the Ev line. AMM: Photometric means, 14: Manual operation means, M, No. Applicant Minolta Camera Co., Ltd. 7roro Figure 77 7 Figure 1 Rim>out5θlsu νU Figure 2 Me0:11-+, ― …Mi “”I+
r! ! '・：・、、：：・iI Q
IQ trU tDUItuL) No. 70
2 Figure 1/θ Figure 1 I/Figure 1/2 Figure 1/3 Figure 1-4 Figure 1: θ, s Tv shift Figure 715 Figure 1/z Figure 1/7 Figure 118 Figure 2 To/Noah Figure

Claims (1)

[Claims] 1) A photometric device that outputs photometric data according to the amount of light incident on the light receiving section, a manual operation device, and a plurality of storage units, and stores the photometric data of the photometric unit in each storage unit when manual operation is performed. a storage means for storing; a control data output means for outputting one manually set exposure control data or one exposure control data calculated based on at least one stored value of the storage means; deviation amount calculation means for calculating the deviation amount of data according to each stored value of the storage means, two-dimensional coordinate display means, and exposure control data of the control data output means on one coordinate axis of the display means. A relative scale is set corresponding to a specific position, and the data corresponding to each stored value of the storage means is displayed in order to display the number of deviations of the deviation amount calculation means two-dimensionally in a frequency distribution with this position as a reference. A display device comprising display driving means for displaying on the display means and displaying photometric data currently being measured with respect to the relative scale at a display position different from the frequency distribution.