JPS62115137A - Display device for camera - Google Patents

Abstract

PURPOSE:To recognize visually forecast of the control value for an object luminance easily by displaying a line indicating an exposure control characteristic corresponding to a selected automatic exposure control mode and a line indicating a calculated exposure value corresponding to a measured value. CONSTITUTION:A photometric circuit AMM converts the photometric value to a logarithmic compression signal value and inputs it to a microcomputer BMC. The microcomputer BMC calculates the exposure value based on the photometric value and the film sensitivity. The microcomputer BMC performs the automatic exposure control selectively in plural automatic exposure modes based on the calculated exposure value. When one exposure mode is selected by the manual operation, it is converted to a signal, which displays linearly a linear chart for exposure control indicating the exposure control characteristic for the object luminance in the selected exposure control mode, by a decoding means. The calculated exposure value is converted to a signal for linear display by a decoding means. Outputs of these decoding means are displayed on a display means through a display circuit DSP.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application of Togami The present invention relates to the exposure time and aperture value controlled in a camera that performs automatic exposure control, the exposure value determined by the photometric value and the film sensitivity value, the program diagram, the set exposure time, The present invention relates to a display device for a camera that can display information in relation to a set aperture value, etc.

E1 Skin 1 The exposure time or aperture value controlled by a camera that performs automatic exposure control is generally indicated by indicating or displaying the part corresponding to the control value in a numerical band arranged in a row or in a different manner from the others. It is displayed on a one-dimensional display device.

However, with this one-dimensional display device, only the control value corresponding to the subject brightness 1 at the time the display is made is known for either the exposure time or the aperture value; It has not been easy to predict in advance what kind of control value will be obtained for brightness.

Also, since one control value only changes one-dimensionally, it is difficult to visually tell the photographer how the combination of exposure time and aperture value changes in response to changes in subject brightness. It was difficult. In particular, with cameras that have multiple automatic exposure control modes, the change characteristics of the combination of exposure time and aperture value with respect to subject brightness change depending on the selected mode, so it is difficult for the photographer to know which mode is currently selected. It was inconvenient because I had to keep it there.

SUMMARY OF THE INVENTION The present invention provides a display device for a camera that performs automatic exposure control in a plurality of modes that are selectively selected, in which predictions of control values for subject brightness can be easily confirmed.

The present invention provides a means for displaying two-dimensional coordinates in which one axis is scaled with exposure time and the other axis is scaled with aperture value, and a display means for displaying two-dimensional coordinates in which one axis is scaled with exposure time and the other axis is scaled with aperture value. Program diagram.

A first means for linearly displaying an exposure control diagram showing exposure control modes such as a set exposure time or a set aperture value on the display means; The present invention is characterized in that it comprises a display means and a second means for displaying a linear display every 1 hour.

Effect How the combination of aperture value and exposure time changes depending on the selected exposure control mode and set exposure conditions, and how the combination of aperture value and exposure time changes depending on the exposure value according to the photometry value. In addition to displaying the two-dimensional coordinates as a graph, it is also possible to read the combination of the exposure time and the actual control value from the coordinates of the intersection of the inner straight lines. By reading the combination, the prediction of the control value according to the change in the exposure line ('I) is visually displayed in an easy-to-understand manner as each straight line.

1! ILJL FIG. 1 is a block diagram showing the entire camera system to which the present 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 imprinting function, interval shooting function, camera body (
This circuit has a calculation function for exposure control of the BD).This circuit is installed on the camera back cover, and from now on, this circuit (I3CK
C) is called a back circuit. Also, this back circuit (BCK
The camera back cover with C) is the back (r3CK)
It is called.

This back (BCK) can be attached to and removed from the camera body (BD) in a replaceable manner, and the camera body has a back cover that is equipped with a circuit that only has data imprinting functions and interval shooting functions. A back cover not provided with the circuit having the above-mentioned function may be attached instead of this back (B CK ).

Note that the configuration and function of this buck (B CK ) and the buck circuit (BCKC) will be described later.

Switch (S,) and terminal (Too) of camera body (BD)
) is a motor drive device fff (hereinafter simply referred to as motor drive), and when the exposure control operation is completed, the switch (S, ) is turned "ON".
Then, the motor in the motor drive (MDR) starts rotating, and a mechanical interlocking mechanism performs film winding and charging of the exposure control mechanism. When charging is completed and the switch (S4) 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) may be provided within the camera body (BD).

Camera body (BD) and terminal (Tz)t(T I2), (
The circuit (LEC) connected at T, 3) is a data output circuit provided within the interchangeable lens. This circuit (L
EC) is electrically connected by attaching the interchangeable lens to the camera body. Then, connect the terminal of the camera body (C8
When L) becomes 'Low', it enters the operating state, and various data specific to the interchangeable lens are sequentially output in series based on the reading clock pulse from the camera body (+3D).This data includes the 11, IJ11 maximum aperture value data, maximum aperture value data, focal length data, characteristic data for automatic focus adjustment, etc.Details and data of this circuit can be found in, for example, Japanese Patent Laid-Open No. 59-84228. , JP-A-59-1.40408, so the description thereof will be omitted.

(MET) is an external exposure meter (hereinafter referred to as meter). Camera body (+3D) and terminals (T,,), (T
I5).

The circuit (IIEC) connected at (TI6) is a receiver that receives infrared light No. 14 sent from the meter (MET). In addition, the receiver (REC
) and the circuit (FL) connected to the terminals (T, □), (718), and (T, 9) is a flash device. The receiver (RFC) is attached to the hole 1 shoe of the camera body (BD), and the 7 lash device (FL) is attached to the hot shoe provided on the receiver (f<IEC) as shown in Figure 1. The connection state will be as shown in .

In addition, only the receiver (RFC) may be attached to the camera main body (BD), or only the 7″7 device (FL) may be attached to the camera body (BD).
'r, 4), (T Is), (T ,, t) The same end r group is provided in another part of the camera body (BD) other than the hot shoe (for example, the bottom of the camera), and the hot One of the 7 lash device (FL) and receiver (REC) is attached directly to the shoe, and the other of the flash device (FL) and receiver (RFC) is attached to the other part via an adapter. You may also do so.

The meter (MET) can be used as an incident light type or reflected light type exposure meter, and can also be used to measure ambient light,
It is now possible to measure flash light as well.1. I'm here. Then, exposure control data is calculated based on the measured values, and this data is emitted as serial light data by the infrared light projection means. In addition to this, the emitted data includes =8- data indicating whether the flash device (FL) is to emit test light, and whether control data is being sent from the meter (MET). be. Data based on infrared light sent from the meter (MET) is read by a receiver (RFC) and latched as an electrical signal.

Next, the signal lines (S T I), (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) completes the travel of the front curtain (1C),
When closed at α, the 7 lash device (FL) starts emitting light. Also, the receiver (RFC) is connected to the meter (MET
) receives a test flash signal from the receiver (1).
REC) connects this terminal (STI) to 1. oul" to start the flash device's light emission. Signal line (
ST2) is data transmission from one camera (II I') to seven flash devices (FL) (for IT, flash device (FL), receiver (RF, C) to camera body (
This is a bidirectional serial data bus for IT.Furthermore, a signal indicating that the X contact (SX) has closed and the flash device (FL) has started emitting light is sent to the flash device (PL). It has the function of transmitting information from the camera body (BD) to the camera body (BD).

The signal line (ST3) has two modes: one mode inputs data from the flash device (FL) and receiver (REC) to the camera body (BD), and the other mode outputs data from the camera body (BD) to the flash device (FL). This is a line that transmits the mode in which the camera body (BD) starts an exposure control operation from the camera body (BD) to the 7 lash device (FL) and receiver (RFC) in pulses at different times. In addition, it has a function to transmit synchronization clock pulses for data exchange from the camera body (r3D) to the flash device (FL) and receiver (REC), and also transmits a signal to stop the flash device (FL) to the camera body. (BD
) to the 7 lash device (F' I= ).

In the camera body (BD), the microcomputer (
(hereinafter referred to as microcontroller) (BMC) is the line (C8F
) is set to °“Lou+”, the interface circuit (I
F) is in a state where data can be exchanged. When the camera body (BD) inputs data, the microcomputer (BMC) sends the pulse during the first time to the signal line (FM).
O), this pulse signal is output to the signal line (ST
3) Flash installation via ff! ? (FL) and receiver (REC), each of which enters data output mode. Then, when a clock pulse for reading data is output from the terminal (SCK) of the microcomputer (BMC), it is sent to the signal line (SCK) via the interface circuit (IF).
T,).

First, the flash device (FL) outputs 1 byte of data to the signal line (ST?>, and this data is sent to the microcontroller (BM) via the interface circuit (Tr').
C) is read from the data input terminal (SIN). This data includes a signal indicating whether the 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 automatic dimming of flash device n has been performed, etc. be. 2nd byte, 3rd byte, 4 by 10;'', receiver (R
This data is also output from the microcontroller (BMC)
The data is read from the 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 aperture value data.

When the above data input is completed, the signal line (C8F) becomes "'High", and data exchange between the flash device (FL) and the receiver (RFC) is no longer performed.

When transmitting data from the camera body (BD) to the 7 lash device (PL), set the signal line (C3F) to "'Lo".
u+" and outputs a pulse during the second time to the signal line (FMO). Then, the 7 lash device (PL) enters the data input mode, and based on the synchronization clock pulse from the camera body (BD), the microcomputer ( Read 3 bytes of data from the data output terminal (SOU) of the BMC).The first byte of these 3 bytes is the control aperture value (A
v) and exposure control mode, 2-by-I data (Sv+Cv), which is the sum of film sensitivity and exposure compensation data,
The third byte is the focal length (fv) of the interchangeable lens. Is the data in the 1st byte and 2nd byte 1] properly exposed by the flash? This data is used to calculate and display the photographing distance range to be compensated for by lI+, and the data in the third byte is data for adapting the irradiation range of the flash device (Fr,) to the photographing angle of view of the interchangeable lens.

When the camera body (BD) starts exposure control operation,
Connect the signal line (C3F) to Low'' and connect the signal line (
Outputs the IJ pulse at the time tjS3 to FMO). Then, this pulse is read from the signal line (ST3) by the 7 lash device (FL), and the flash device (
FL) is a light emission mode for exposure control. When the actual exposure control operation starts, “
The interface circuit (I P) outputs a pulse of "Lou +", and the interface circuit (I P)
), the data from the No. 1 line (S'l'2) is given via the signal line (FST), and the signal input from the circuit (FLM) via the line (FSr') is given to the signal line (ST,).The signal input (Sr2) is
“Lo” until the flash device (FL) starts emitting light.
When the flash device (FL) starts emitting light, the signal changes to "I(ig++").The light emission control circuit (FLM) outputs a signal of "u+" and changes to "I(ig++") when the flash device (FL) starts emitting light. A light receiving element is provided to receive the light, and the signal lines (S T 2) and (F S T )
When the current changes from "Higb" to "Lou+", the output current portion of this light receiving element starts.Then, the integral value becomes A-
D, data S based on film sensitivity (Sv) and exposure compensation amount (Cv) input from the D-A conversion circuit (ADA)
When the value corresponding to the analog signal of v+Cv is reached, a "High" pulse is output to the signal line (FSP). This pulse is input to the flash device (FL) via the signal line (Sr1) and the flash light emission stops. .

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

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

When using this function to perform interval photography with flash photography, the camera body (BD) is activated from the back circuit (I3CKC) a certain period of time (for example, 1 minute) before the start of photography (W is input When the camera body (I3D) is started, the flash device (FL)
Data is exchanged with and a voltage boosting operation is performed. v
Even in interval photography using flash photography with intervals of 15 minutes or more, the flash must be installed (
FL)'s main capacitor is fully charged.

Above meters (MET), receivers (RFC)
, flash device (F”L), interface circuit (
IF) and the flash light emission amount control circuit (FLM) are described in, for example, Japanese Patent Application No. 59-201:t81, and will therefore be omitted here. In addition, specific examples of the flash device (FL), interface circuit (IF), and flash light output control circuit (FLM) can be found in JP-A-59-'zz
15zo and Japanese Patent Application No. 59-48435.

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)''
, is controlled “OFF” and the transistor (BT) is “ON”
"Then, the photometry circuit (FLM) is connected via the power supply line (10V).
), (AMM), A-D/D-A conversion circuit (ADA
), power is supplied to the lens circuit (LEC). (DS
P) is a display circuit that displays the photometry mode, exposure control mode, exposure time for control, aperture value for control, film sensitivity, exposure compensation amount, and the status of the flash device. Furthermore, when the exposure time and aperture value are out of control interlock, the exposure time and aperture value are at the control limit and a warning is displayed. This display circuit (D S P ) is a signal line (C8D)
is set to “LoII+”, the microcontroller (BM
C) from the data output terminal (S OU ) to the terminal (S C
It reads serial data sent in synchronization with clock pulses from K) and displays based on this data.

(AMM) is a steady charging photometry circuit, which has a light receiving element for partial photometry and average photometry, and this is a signal line (ASMO
) from 'll1Bl+"H" T, + (song).This photometric circuit (AMM) outputs a voltage signal obtained by logarithmically compressing the output current of the light receiving element.

The A-D, D-A conversion path (ADA) is connected to the signal line (A
When the "LoII+" pulse is output to D S T
-D conversion. Also, the signal line (C3A) is “Low”
When (ADMO) is "I-I i gIt", A-D is synchronized with the clock pulse from the terminal (SCK).
The converted data is sent to the data input terminal (SIN) of the microcontroller (T3MC), and the signal line (CS A) is set to “L”.
When (ADMO) is “Low” at “ou+”, the data is output from the output terminal (SOtJ) as the aforementioned data S v +
Cv is read and this data is converted to 1)- and output to the light emission amount control circuit (FLM). In addition, the signal line (
When C3A) is "High", no data is exchanged with the microcomputer (BMC). (G1) is a gate circuit that becomes active when the signal line (C8L) becomes "'Lo1.ll" and connects the lens circuit (L) to the microcontroller (BMC).
It becomes possible to transfer data from EC).

(AFC) is an automatic focus adjustment circuit, and the signal line (
When AFEN) becomes “Low”, it enters the operating state and becomes “H”.
When the signal line (c S A F ) is "Loud", the operation is stopped. When the signal line (c S A F ) is "Loud", the 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 Publication No. 140408/1983, so the details will be omitted. .

(APG) is a means for outputting pulses in response to the movement of the aperture member of the aperture, and this pulse is output by the microcomputer (13
Mc) is input to the terminal (CKIN).

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 becomes "0", it means that the number of filtering stages has been narrowed down by the planned number of filtering steps, and when the counter Fll+ is reached, a pulse for stopping the filtering is output from the output port (OP12) and the filtering operation is stopped. .

(MG D ) is a magnet circuit, (i number uin (
When a pulse of "1., our" is output to RL), the release magnet operates, and the lock-in operation and mirror-up operation are started. When a "Loud" pulse is output to the signal line (AP), the fringing magnet is activated and the narrowing down operation is stopped. “Lou+” on line 14 (1C)
'' pulse is output, the leading curtain latch release magnet operates and the leading curtain starts running. "L" is output on the signal line (2C).
When the "ow" pulse is output, the trailing curtain lock release magnet operates and the trailing curtain starts running.

(G2) is a date circuit, and the signal line (C8B) is “L”
oud”, it becomes active and the buck circuit (BCK
Data I can be received and received between C) and the microcomputer (r3Mc). The signal line (C6I3) is connected to the bar circuit (BC
When the camera body (BD) is in operation and you try to exchange data with the back circuit (BCKC) -19=, the back circuit (BCKC) is activated.
) is also in the operating state. Furthermore, the signal line (C8B) outputs a "Low" pulse when the trailing curtain starts running in order to prevent film winding when data is imprinted in the back circuit (BCKC). It is designed to be output. Buck circuit (BCKC)
When this pulse is input, 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”, it is connected from the camera body (BD) to the back circuit (BCKC).
), and when it is "Loud", the data is sent from the back circuit (BCKC) to the camera body (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 is a pulse whose time corresponds to the film sensitivity.

The switch (Sl) is a photometry switch that is closed one step after the release button is pressed, and starts photometry calculation operation. In addition, the back circuit (L3CKC) is connected to line 43 (B) in parallel with this switch (S,).
S,) is input, and the microcomputer (13MC) can also be started from the back circuit (BCKC).

Back circuit 1fa (n CK C) to signal line (B
The start signal is manually input via the back circuit (S+).
When the back circuit (BCKC) is operated and the back circuit (BCKC) is operated, and as mentioned above, the flash device (t”L) is activated one minute after starting the shooting operation in interval shooting.
There are two types: a case where the camera body is activated to start shoulder pressure;

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 (+332) from the back circuit (BCKC) is connected in parallel to this switch (S2), and the back circuit (r3cKc) allows interval shooting and shifts the fixed exposure value by -. Furthermore, when a predetermined number of images are to be taken (hereinafter referred to as bracket photography), a signal is transmitted to the camera body (r3D) to start the photographing operation. Furthermore, when shooting a predetermined number of frames (hereinafter referred to as the number of 7 frames) during bracket shooting, the release switch (S2) on the camera body (BD) is set to "O".
Even if the mode is N'', the transition to exposure control operation is controlled by the back circuit (B
(CKC) side, and when the release switch (S2) of the camera body (BD) is set to "OFF", it is possible to move on to the next bracket shooting. Therefore, the release switch (BCKC) monitors the status of the release switch (S2) on the camera body (BD) and turns the release switch (S2) "ON" after the set number of frames have been shot using bracket shooting. If so, data prohibiting transition to exposure control operation is sent from the back circuit (BCKC) 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, from the back circuit (BCKC), at the start time, a Lo signal is sent to the signal line (BS2) until the number of frames have been photographed.
The exposure control operation is performed by outputting the (i) of "w". When the shooting of one group is completed, the 4W line (I3 S 2) is set to "Hight+" and the time count for the set time interval is Then, the remaining time is displayed.When the remaining time reaches 0 seconds, the signal line (B
S2) is set to "LOLI+" and images are taken for the number of frames. When the above operations are completed, the set interval shooting mode is canceled. Note that even if the back circuit (BCKC) is operating in interval shooting mode, the release switch (I3D) on the camera body (I3D)
If S2) is closed, the set start time and darkness interval are ignored and the photographing operation is performed. That is, even if the start time has not yet been reached, when the release switch (S2) is turned "ON" and the shooting operation starts, the back circuit (BCK
In C), the signal line (1'3 S2) is set to "L, ow" until 7 frames are photographed. Also, the release switch (S
The same operation is performed when 2) is closed. The number of wtT# operations performed on the camera body (BD) is
The determination is made by counting the number of input pulses for data imprinting from the signal line (rp).

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) is turned 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). There is. Each mode is P-)A-
It changes in the order of +M-+5-)P...

The switch (SIS) is a switch for setting the film sensitivity.
The film sensitivity changes in steps of 1/3Ev each time it changes from "OFF" to "ON", and after reaching the upper limit value, when the switch (SIS) changes from "OFF" to "ON", it changes to the lower limit value and then returns to the lower limit value. When the switch changes from "OFF" to "○N", it increases again.

(SOR) is a switch that sets the exposure compensation amount, and each time this switch (SOR) changes from 'OFF' to 'ON', it changes from 0 → 1/2 → 1 → 11/2 → 2 → 21/2 → 3→
31/2→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 → 165ec-+
85ec-* --4171000sec-$1720
00sec-+1/4000S(・C→32sec-b
It changes like this, and when in M mode,
:12sec →16sec -----+ 1/200
0sec → 1/4000sec → Pulp → 32sec →
It changes like this. Therefore, the valve mode can be set by operating the switch (ST) in the M mode. The switch (SA) is a switch that sets the threshold value, and this switch (SA) is OFF.
When the aperture value changes from 'ON' to 'ON', the aperture value changes from the open aperture value to the maximum aperture value in 1/2Ev steps when the mode is the Δ1M mode.Then, when the aperture value reaches the maximum aperture value, the aperture value changes to the open aperture value. The above Sui Nchi (SMO), (
SI S), (SOR), (ST), and (SA) are switches that are closed by operating operation keys provided outside the camera, respectively. In addition, the switch (Sl), (8
2), (SMO), (SI S), (SOR), (S
T) and (SA) are connected to the interrupt terminal (INT) of the microcomputer (BMC) through an AND circuit (AN), and therefore, the data setting key provided outside the camera is operated. When the release button is operated,
Furthermore, the signal line (B S
When the "Lour" signal is inputted through BMC1) and (BS2), if the microcomputer (BMC) is in a stopped state, the microcomputer (BMC) accepts this interrupt number i and starts operating. The switch (SCN) is a switch linked to a mechanical film counter.

This switch (SCN) remains "ON" until the film counter reaches the position where the number of shooting frames indicates "1".
From the `` position onwards, it becomes OFF''. This switch (S
The signal from CN) is input to the microcontroller (BMC).
IP, ) and the back circuit (BCK) via the terminal (T9).
C). The microcomputer (BMC) is a switch (
While S CN ) is "ON", exposure control is performed using the shortest exposure time and maximum aperture value. On the other hand, the back circuit (BCKC)
is the signal line (rp) while the switch (SCN) is ON''.
) does not perform the data imprinting operation even if a pulse signal is input from Although there is a function to add or subtract `` and imprint this data, the addition and subtraction operations are not performed while the switch (SCN) is ``ON''. In addition,
When the switch (SCN) is ON'', the open line
If the pulse is not output to I'), the buck circuit (BCKC) will check the state of the switch (SCN) and
There is no need to distinguish between whether to imprint data or whether to perform addition/subtraction, and the terminal (T9)
will also become unnecessary. In addition, an electrical film counter is used instead of a mechanical film counter, and the OII until the film reaches the proper shooting frame position (the counter display is "1") is determined by passing the Lou+" signal to the terminal (T9). The pulse may be outputted, or furthermore, the pulse may not be outputted to the signal line (rp).

The switch (SAS) is connected to the metering mode switching member attached to the exterior of the camera to switch between "ON" and "OF".
F" switch, and this signal is sent to the microcomputer (BMC).
), and the microcomputer (
BMC) will output a Low signal from the output port (OF2) to the signal line (ASMO) if the “LoIll” signal is input.
'' signal to set the partial photometry mode and cause the display section (DSP) to display the partial photometry mode.

On the other hand, if a “High” signal is input to the input port (IP), the signal line (ASMO) will be “High”.
The signal is output to set the average photometry mode, and the display section (DSP
) sends data to display the average metering 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.This switch (S4)
The signal from the microcontroller (BMC) input port (IP,
) is entered. The microcomputer (BMC) will not shift to the exposure control operation even if the release button f- (S2) is turned on if the switch (S4) is set to "'Low" (i).

Note that the microcomputer (nMc) outputs pulses to (ii Milliline IP) for a time corresponding to the film sensitivity, but the back circuit (BCKC) shown in Figure 1
A time corresponding to the film sensitivity read from the camera body (nD) 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 a function to read film sensitivity data from the camera body and create a time corresponding to this data, and the signal line HP
) The back cover is equipped with a data imprint section that imprints data while pulses are being input from the camera body (1
3D), so the microcomputer (I3
MC) has even more features. The back circuit (13cKc) has a function to record the exposure time and aperture value for exposure control sent from the camera body. 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 control the exposure control from the camera body (BD) in order to reduce the probability that the trailing curtain starts running and stops before data imprinting reaches an appropriate time. When it detects the movement of changing the time and aperture value, it starts the imprinting operation.

The operation of the camera system shown in FIG. 1 will be explained below based on charts 70 in FIGS. 2 and 3. switch (S+),
(S2) (SMO), (SI S), (SOR).

Either (ST) or (SA) becomes “ON” or the signal line (BS, ) of the back circuit (BCKC).

When "Loud" No. E is input from (BS2), the output of the AND circuit (AN) becomes t1-o,++, and the interrupt terminal (INT) of the microcomputer (BMC) becomes "Lo".
Then, the microcomputer (BMC), which had stopped operating, starts operating from step #0.

First, in step #0, the signal line (C8B) is set to “L”.
Outputs the ou+'' pulse and connects the back circuit (BCKC).
, and in step #1, the transistor (BT
) is “ON” and the photometry circuit (+-' L M ), (
AMM), A-D, I)-A conversion circuit (
ADA) and the lens circuit (Ll/:C). Then, in step #2, the input port (IP,)
Whether the “LoIII” signal is input to the switch (S2) is “ON” or not, the buck circuit (BC
It is determined whether the relay X signal is input from the signal line (BS2) of KC). And, Ikapo)
If a “Low” signal is input to (IP,), #
In step 9#3, which moves on to step 3, it is determined whether the switch 7 (S,) is turned "OFF" and charging of the exposure control mechanism is completed, and if it is not turned "OFF", the exposure is Since the control operation cannot be started, the process moves to step #10. On the other hand, the switch (S4) is “OFF”.
”, then in step #4, 7 lag RL
Determine whether E F is "1". This 7 lug RL
E F is ready for exposure control data 31 (Tv, Av), and the hack circuit (BCK
If the release prohibition signal is not input from C), it will be set to "1", and the data preparation has not been completed, or the release prohibition signal (input at the end of bracket shooting) is input from the back circuit (BCKC). If it is, it will be reset to “0”. 7 lag RL E F is “1” in step #4
The exposure control operation starts from step #110 and moves to 70-, and if 7 lag RLEF is 0'', step #1
Move to step 0. Furthermore, if the "LoIll" signal is not input to the input port (IP) in step #2, the process moves to step #10.

In step #10, “Lo
Determine whether or not 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 ■, oI11'' is input to the input capo) (IP, ) by the switch (S,) or by the back circuit (BCKC).Next, #12 In step , the switch (SA
Depending on the state of S'), one of the partial and average light receiving elements in the photometric circuit (AMM) is selected, and the process moves to step #13. In step #13, the signal line (C3
By reading L) as "Lou+" and repeating the serial input/output operation multiple times, various data are read from the lens circuit (LEG).Next, in step #14, A is read from the clock output terminal (CK OUT). - Start outputting the D conversion clock and set the signal line (ADSTA) to “Low”
The output of the photometry circuit (AMM) is A-D by outputting the pulse of
.

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. If 7 lags S and F are not set, it means that the operation is not based on the signal line (BSI) of the switch (S, ) or back circuit (BCKC). In order to prevent the signal line (AFEN) from moving inadvertently,
'', and reset the 7 lags S and F to "0" in step #25 (in this case, they have already been reset to "0") and move on to step #26. On the other hand, if the 7 lags S and F are "1" in step #20, then in step #21 it is determined whether the input port (IP,) is still "Lou+". This is the buck circuit (BCKC)
) to start the boost operation of the 7 lash device 1 minute before interval shooting, or the back circuit (13CK
When C) starts the operation for exposure calculation, a "Lou+" pulse is output to the signal line (BSI) in order to start up the camera body (BD). By the way, it is undesirable that when the camera body (BD) is started up by the camera body (BCKC), 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 microcomputer (BMC), set the "Lo off" pulse to 4 times, which is shorter than the time from the time when the interrupt signal is input to the microcontroller (BMC) to step #21, and longer than the time to step #10. .1 line CBS,), and at step #21, the input capo) (IP.) is “■
, at the time of determining whether the signal line (AFEN) is set to ouII+ or not (the d-in (13S,) is set to "Iligb". Therefore, in this case, the signal line (AFEN) is 111g1+'' to disable the automatic focus adjustment operation, and proceed to step #26 via step #25.

On the other hand, in step #21, input capo-1- (IP.) is “
When it is determined that the light is "Lou+", this means that the photometry switch (Sl) is "ON", and in this case, the signal line (AFEN) is set to "Lou+" and the automatic focus adjustment circuit is turned on. (AFC), set the signal line (C3AF) to "LouI", send data for automatic focus adjustment, and set the signal line (C8AF) to "'I-1i".
After returning to gt+'', 7 lag S in step #25
Reset IF to "0" and move to step #2G. In step #26, the flash device (FL
) and the receiver (RFC). As mentioned above, this operation is performed using the signal line (C3F).
to Lou+″′ and fiSl to the signal line (FMO).
Outputs a pulse at time 1]. Then, serial input/output operations are performed. First, the 1st byte data from the flash device (FL), then the 2nd, 3rd, and 4th bytes of the data read from the meter (MET) from the receiver (RFC). Data is output in the order of the numbers, and this data is read. Then, the signal line (C3F) is set to "High" and the operation of step #26 is completed.

Next, in step #30, it is determined whether the film sensitivity setting switch (SIS) has changed from "OF F" to "ON", and if it is determined that it has changed, the film sensitivity data is increased by i/3Ev. Then, proceed to step #32. On the other hand, if no change is detected,
Immediately, the process moves to step #32, and it is determined whether the exposure compensation amount setting switch (ORS) has changed from "OFF" to "ON". And when a change is detected #3
In step 3, increase the exposure compensation amount by 172Ev and #
The process proceeds to step #34, and if no change is detected, the process directly proceeds to step #34.

In step #34, check whether the switch (SCN) is "ON" or not, and if it is "OFI", step #40
Move to the next step. -Power, switch (SCN) is “
ON”, the film counter will display the regular number of frames (“
1") is not displayed (S...), and in this case, proceed to step #35. In step #35, the minimum exposure time (TvIIlax) and the maximum Set the aperture value (A vmax) for control, and set 7 lag RL E F to 1 in step #108.
'', the process moves to step #75.The control data from the back circuit (BCKC) or meter (MET) is transferred to the receiver (R
EC), the camera body ignores this data and performs exposure control at T va+a and A vmax.

In this case, exposure calculations are not performed on the camera body (nD), and settings other than film sensitivity and exposure correction amount data cannot be read. In addition, the battery 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 causes the camera body (I3D) to perform exposure control based on this data (hereinafter referred to as back ICP). ) is read, it is set to "1", and otherwise it is reset to '0'. Therefore, the first operation is always set to "0".
”, so the process moves to step #41. On the other hand, when exposure control is performed based on data from the back (BCKF=1) #43-#4
Do not perform step operation to change the data in step 8 and immediately return to #51.
Move to the next step. Therefore, the switch (S M O
), (S T ), (S A >frt Even if operation 3 is performed, the data is not changed.

In step #41, the mode switch (SMO) is set to “O”.
Determine whether it has been changed to ``ON'' from the FF pipe,
When the change is determined, the exposure control mode is changed. on the other hand,
Switch (SMO) may be “OFF” or “ON”
”, the exposure control mode remains as is, and
Move to the next step. In step #43, S, M
It is determined whether the mode is set, and since S and M modes accept changes in exposure time, the process moves to step #44. On the other hand, S.

If the mode is not M mode, the process immediately moves to step #46. In step #44, Sui Nochi (ST)
Depending on i'11 whether it changed from "F" to °"ON",
When a change is detected, the exposure time is increased by IEv. - If no change in force or switch (ST) is detected, immediately proceed to step #4G.

As mentioned above, the EL1σ exposure time (1/4000
sec), the switch (ST) is set to '01'F"
When the exposure time changes from "'ON" to "ON", the exposure time changes to the longest exposure time (32 seconds) in S mode, and changes to bulb in M mode. 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 aperture value cannot be accepted, so the process moves directly to step #50. At step 47, switch (S)
Determine the change in A). Then, if there is no change, proceed to step #50 and switch from “°○FF” to “ON”.
”, the aperture value is increased by ]/2Ev and the process moves to the next step #50.
．． #32441゜#44. #4.7 switch “OF”
To detect a change from "F" to "ON", the switch state at that time is memorized at each step, and the switch state at the next step is combined with a signal that stores the previous state. It can be detected by comparing.

In step #50, connect the signal line (C8A) to Lou
+”, then perform serial input/output operation, read the A-D converted data in series, and connect the signal line (C3A).
is set to “l-11g++” and the clock output terminal (CK
The output of the clock from OUT ) is stopped and the process moves to step #51. And in step #51, 7
Determine whether lag BCKF is “1” and if it is “1”,
#55 without going through the calculation step of $52.53.54
Move to the next step. On the other hand, if the 7-lag BCKF is 0, the process moves to step #52 and the flash device (P
It is determined by 1 whether or not a charge completion signal is input from L). If the charging completion signal is input, #53
In step , exposure calculation for 7-lash photography is performed, and if a charge completion signal is not input, exposure calculation for ambient light photography is performed. Further performance t7. When the operation is completed, the microcomputer (BNC) shifts to the operation of step I55.

In addition, specific examples of performances #53 and #54 are, for example, published in Japanese Unexamined Patent Publication No. 59
1.11132, Japanese Unexamined Patent Publication No. 140408/1983, etc., and therefore will be omitted here.

In step #55, the signal line (C3B) is set to “Lo”.
u1", and the signal line (BIO) is "Hi gl+
”, the data is transferred to the back circuit (BCKC).The following data is sent from the camera body (Bl).First, the 1st byte is the data sent from the flash device, and the 2nd byte is the data sent from the flash device. The 3rd, 4th, and 4th bytes are the meters read from the receiver (REC).
The data is from MET). Note that when the back circuit (I3CKC) determines that exposure control data from the 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. . External 7
Call it Anxion! ζ. When the exposure control data from the meter (MET) is input, this external function
If the function in which the back circuit (BCKC) performs exposure calculations (hereinafter referred to as the exposure function) is active, what exposure modes (three types of P mode, S, A, M mode, and manual long time) can be selected. (M
/LT) mode is selected, it becomes an external function and performs exposure control 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). This 77 function contains the average value (Σ
13vi/N) (average mode i=1 - mode), the intermediate value between the maximum and minimum of the stored photometric values ((
B vmax + B vmin) / 2) (hereinafter referred to as center mode), mode to determine the value (Bv+nax 2.3) that reproduces the maximum value as the upper limit of film latitude (highlight mode), and minimum value as the lower limit of latitude The value reproduced in (n v+oin-l-2,7
) is available (shadow mode). Even if such a multi-function is active, if the exposure control data is manually input from the meter (MET),
It becomes an external function, and multi-function is disabled. 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,
Once 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 5-by-11] data sent from the camera body (Bl') to the back circuit (BCKC) is the photometric data (B v
-Av. ) (A vo: maximum aperture value), the 6th byte is the maximum aperture value data (Av,) read from the lens circuit (LEC), and the 7th byte is the maximum aperture value data (Av+o
Furthermore, the 8th byte is the shortest exposure time de(
Tvmax), the 9th byte is the maximum exposure time data (1゛ν+n in), the 10th byte is the synchronization limit exposure time data for flash photography (Tvx), and the 11th byte is the exposure time data determined by the camera body (BD). (Tv),
The 12th byte is the aperture value data (Av
). Furthermore, the 13th byte is the film sensitivity (Sv
), the 14th byte is the exposure compensation amount (Cv).

When the above data transfer is completed, the camera body (BD)
The microcontroller (BMC) moves to step #56,
Set the signal line (BIO) to “Lou+”. Then, 1 byte of data is sent from the back circuit (BCKC). This data is the aforementioned back TCP. When the exposure function is selected, the back circuit (BCKC) sends data such as "808" (H indicates a hexadecimal number), and when the exposure function is not selected, the back circuit (BCKC) outputs this data. Without doing so, the camera body (BD) reads "001-1". When the reading of this back ICP data is completed, the microcomputer (BM)
C) sets the signal line (C813) and (B I O) to “H”
igh” and the process moves to step #57.

In step #57, it is determined whether the back ICP is "80H" or not, and if it is not "8011", the back circuit (
BCKC) is installed, or the exposure function is not selected in the back circuit (13CKC). In this case, the data from the camera body or the meter (MET) In step #58, 7 lags 13
CKF is reset to 0'' and the process moves to step I90.

Back in step #57) If it is determined that the CP is "80 T-1", in this case, it means that the exposure function has been selected, and the process moves to step #60 and sets the 7 lag l3CKF to 1. ”. Then, based on the data sent to the back circuit (BCKC), the back circuit (
I3CKC) waits for sufficient time to calculate the exposure control data in step #61.

During this time, the back circuit first calculates a photometric value based on the sent data. During this time, the signal line (C3
B) remains "Low". This means that if the multifunction is not selected, (B v - A
vo) + A vo: B It only performs the calculation of v, but if the multi-function is selected, it will perform the calculation 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 multi-function,
Unless a memory operation (pressing the memory key) is performed, exposure calculations will be performed each time the photometry data from the camera body (BD) is updated.
After the storage operation is performed, control data is calculated based on the stored photometric data, and the camera body (BD
) will only be 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. In the program mode, this calculation is performed using the first program (P,) with a slope of 2/3, which divides Bv+5v=Ev into the frit value and exposure time at a ratio of 2:1.
mode (in principle, Av=2/3 ・Ev, 'rv=
1/3・Ev), 12 programs with a slope of 1/2 (
P, ) mode (Av=1/2 ・EvS Tv=1/2
・Ev), third program (P3) mode with slope 2/3 (Av= 1/3 ・Ev, Tv= 2/
There are three types: 3.Ev). In addition, in S mode, Tvh and Ev- set by the back circuit (r3 CK C)
Tv=Av is determined, A mode is E from the set Av.
v Av=Tv is calculated, and in M mode, the set Δv and Tv are calculated as control values.

Note that the calculated A vfJ' A v > A vm
If nx, then EV-Avmnx=TvSAv<Avo, then EV-Avo=Tv is calculated. VmaX+ or Tv and Avo are the calculated values. Similarly, when T v < T v + nin, TvIOi
n and EV−Tv+oin=Av, T v > T v+
When nax, “l”vmax and EV-Tvmax=A
Let v be the calculated value. Moreover, in the P l IF5-P3 mode, A vo < A Vl l A V2
A manually set Av5.<Avma. Av2 limits the aperture.

Furthermore, in the M/LT mode, it is possible to set an exposure time longer than the maximum exposure time (Tv...in) 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 LOLII.
”, so that the rear curtain does not run, and when the count ends, (BS2) is set to “High” and the rear curtain runs.The data for display on the camera body is the bulb display. Data for setting time display is sent instead of data for display.If multi-function is not selected, the exposure control m#X diagram and Ev of each mode are sent.
A value line is displayed graphically on the back side, with the vertical axis representing the aperture value and the horizontal axis representing the exposure time. Furthermore, when the multi-function is selected, each stored value and current value based on the exposure control value is displayed graphically.

Also, if the bracket F function is selected,
Using the calculated III 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 in the form of a bar graph which position is currently being photographed. Details of the display with six or more exposure functions will be described later.

In addition, when it is determined that there is charging completion No. 48 in the data from the flash device manually inputted via the camera body, the back circuit does not perform the above calculation display, and the camera body (BD) is displayed, and the data is used as control data. This means that the calculation for 7-lash photography (step #53) on the camera body side is
As shown in No. 01:12, etc., it uses a circuit with considerable functionality, so the back circuit (BCKC
) side does not need to perform any calculations for flash photography.

For example, in order to support a camera body that does not have a flash photography function as mentioned above, 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 has elapsed for the above operations to be completed, the microcomputer (BMC) moves to step #62, closes the signal line (BIO) to "Lou+", and starts serial input/output operation. data is read from the back circuit (BCKC). In this data, 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 display (in M/LT mode). (set exposure time), the fourth byte is the back exposure mode (P, , P2...).
P, is P mode, M, M/LT mode is M mode, external 7 mechanism is meter photometry mode), 1.2 bytes of control data is data limited to the limit value because Ev is out of control interlock. There are non-linked data indicating whether the exposure control operation is prohibited, data indicating whether the exposure control operation is prohibited (release prohibition data), etc. After reading this 4-by-Y data, the microcontroller connects the signal lines (C8B) and (B I O) to “I”.
In step #63, the read I"v and Av are set as control data. Then, it is determined whether or not the release inhibition data has been read, and if it has been read, the 7-lag RLEF is set to " If it is not read, reset the flag RL E F to 0.degree. 1" and proceed to step #70.

In step #70, the exposure mode is displayed according to the read mode data (M mode in the case of meter metering mode), and in step #71, it is determined whether or not non-linked data is being read. , if it has been read, a warning is displayed, and if it has not been read, the warning is not displayed and the process moves to step #74. #
In step 74, either meter metering mode or the camera body (
BD) to display whether it 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 the exposure correction amount are displayed, and then, based on the data sent from the flash device (FL), whether or not flash photography will be used is displayed. Next, in step #78, the signal line (C
3F) to Lou+'' and connect the second line to the signal line (FMO).
Outputs a pulse during the time.

When the flash device (FL) reads this pulse, it enters a state in which data from the camera body can be read.

Then, the microcomputer (BMC) firstly stores the data in which the first byte is the control aperture value and the exposure control mode, and the second byte is the sum of the film sensitivity and the exposure compensation amount (3 bytes of S v
The eyes are the focal length data (fv) of the interchangeable lens. The method of using these data is as described above.

When the above operations are completed, the next step is step #79, where the switches (S 1) - (S 2) l (S M O) - (S I
S).

1' is determined whether at least one of (S OR), (S T ), and (S A ) is closed. If even one is closed, the timer is reset in step #80 and the timer is turned off, then the process returns to step #2 and the operations described above are repeated. On the other hand, if the above switch is turned OFF, the count time of the timer started in step #80 (10
sec) has ended, and if it has not ended, return to step #2 again. On the other hand, when 10 seconds have elapsed since all of the above-mentioned switches were turned "OFF", the process moves to step #85. Then, in step #85, the interrupt to the interrupt terminal (INT) is enabled, the 7-lag RLEF and BCKF are reset to "0", and the display is changed to "
OFF” and the power supply transistor (nT)
”, the microcomputer (I3MC) stops operating.

When it is determined in the step #57 that the back ICP is not "80H", the 7 lag BCK is determined in the step #58.
F is reset to "0" and the process moves to step #90 in FIG. In step #90, the meter (MET
), the receiver (RFC) reads the exposure control data, and determines whether the camera body (BD) has read this data. When it has been read, the process moves to step #91, and when it has not been read, the process moves to step #100. In step #91, the aperture value of 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 exposure 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 exposure 1; M mode is set as the U control mode, and meter photometry mode is set as the photometry mode, and the process moves to step #105. On the other hand, if the data from the meter (MET) is not read in step #90, the data calculated in step #53 or #54 is set as control data in step #100. In addition, #63°92.1
The control aperture value setting at 00 is determined by the number of aperture stages (Av-
This corresponds to setting Avo).

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".
7 lag r (LEF is set to 1" and moves to step #75 in FIG. 2.

In step #2, the input capo (IPI) is “LoIll”.
”, the switch (S4) is “OFF”, 7 lag RL
If EF is 1'', the exposure control operation is performed from step 110 in FIG. is stopped, and then a release signal is transmitted to the 7 lash device (F''L).

This operation closes the signal line (C3F) to "Low", outputs a pulse with a third time width to the signal line (FMO),
This is done by setting the signal line (C5F) to "Higb" again. When the flash device (FL) determines that a pulse during this third time period has been input, it enters a light emission mode for photographing. Next, connect the signal line (C3B) to “Lou”
+”, control exposure time data and fringe value data are sent to the back circuit (BCKC).

This data is used as data for imprinting in the back circuit (BCKC), and when this data is input (thereby, the back circuit starts data imprinting when the imprint function is selected). The imprinting functions include control data mode, year/month/day mode, month/month/year mode,
There are day/month/year mode, month/mouth/hour mode, day/hour/minute mode, hour/minute/second mode, count up mode, count down mode, and fixed data mode.

In the control data mode, the control data calculated by the back circuit (BCKC) (only when exposure functiton is selected) or the control data sent from the camera body (BD) in step #112 is imprinted. The year/n/day mode, n/day/year mode, day/month/year mode, day/month/hour mode, day/hour/minute mode 1, and hour/minute/second mode are based on the buck circuit (BCKC). Print the name data from the calendar circuit in order of mode name. Count-up mode and count-down mode imprint a value obtained by adding or subtracting 1" from a preset fixed value each time a photograph is taken. Fixed data mode imprints a preset value.

Next, in step #113, the microcomputer (BMC) sets the signal line (C8A) and (ADMO) to "Low" and sets the sum data (Sv+Cv) of film sensitivity and exposure compensation amount to A.
- Send to the D-D-A conversion circuit (ADA). circuit(
A D A) reads this data Sv+Cv.
-A conversion and output to a flash light amount control circuit (FLM). Next, in order to control the imprinting time, set the film sensitivity on the timer, and in step #115, set the signal line (r r') to "Loud", and set the bar circuit (BC
KC) I) It is possible to determine the start of data imprinting,
To start the imprinting operation of a data imprinting device that does not have the ability to control imprinting time. Then, interrupts by the timer are enabled and the timer starts counting. Then, in step #120, counter interrupt is enabled, and a "Lou+" pulse is output to the signal line (RL) to operate the release magnet and start the narrowing down operation and mirror up operation. Then, in step #122, wait for sufficient time for the mirror up operation to be completed. During this time, the pulse output circuit (A P
A pulse from G) is input to the clock input terminal, and the embedded stage number data preset in the down counter is subtracted every time a pulse is input. Then, when the contents of the counter become "0", the counter interrupt is cleared and the operation of step #150 is performed. In this step, a "Lou+" pulse 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. In addition, there are 51c interchangeable lenses that cannot control frizz.
The counter interrupt may not be activated when the lens is attached or no interchangeable lens is attached, so please set #, +2.
When a certain period of time has elapsed in step #2, the process moves to step #123, where the counter interrupt is disabled and the process moves to step #125.

In step #125, whether the control exposure time data is pulp or not is determined by fII. And when it's not pulp #
The process moves to step 126.

In step #126, “Lou” is connected to the signal line (1c).
+” pulse to operate the front curtain magnet and start the front curtain running.Next, the exposure time is counted, and when the count is finished, a Lou signal is sent to the signal line (2C).
+” pulse is output, the trailing curtain magnet is operated to start running the trailing curtain, and the process moves to step #135.#
When the pulp state is determined by 1' in step 125, the process moves to step #130 and the leading curtain is run.

Then, the input signal to the input port (IP,) is “Hil”
? Wait until it becomes "h". At this time, the back circuit (BCK
C) is not attached, the release button is released,
Wait until the switch (S2) turns OFF'', and when the switch (S2) turns OFF'', the trailing curtain starts running.

On the other hand, when the buck circuit (BCKC) is installed and M/LT is selected, the signal line (IP)
The buck circuit (BCKC) starts counting the time from the moment when the signal line (BS2) becomes “+”.
Low”.Then, the back circuit (BCKC)
When the count ends, the signal line (BS2) is closed to "High", and the camera body (BD) uses this signal to start running the trailing curtain. In this way, in M/LT mode, the camera body (BD
) The exposure time count starts with the signal input from the signal line (IP), and since it is controlled using 1 sec as the minimum unit, the exposure time is not precisely controlled, but the overall Since the 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, a timer interrupt occurs in #14.
In step 5, the signal line (IP) is set to "Higb" 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) is LoI even if the trailing curtain starts running at IIH.
Therefore, in order to forcibly stop the imprinting operation (to prevent imprinting from occurring during the second winding), the signal line (rp) is set to "Higb". Also, in step #136, in order to stop the imprinting operation by the back circuit (BCKC),
A pulse of "LoII+" for a certain period of time is sent to the signal line (C3B), and when the back circuit (BCKC) receives this pulse from the signal line (C8B), it terminates the imprinting operation. Then, the counter receives the timer interrupt.
When the trailing curtain has finished running, turn the switch (S,
) is turned “ON”. Then switch (S,
) becomes "ON", the 7-lag RLEF and 13CKF are set to "O" 1:L, the process returns to step #2, and the above-described operation is performed.

When a continuous shooting mode such as interval function or bracket function is selected in the back circuit (BCKC), “
The "LolIl" signal continues to be input, and the above-mentioned exposure control preparation operation is performed even during the winding operation.
Immediately after the winding is completed and the switch (S4) is turned "OFF", the next exposure control operation is performed. Further, such continuous shooting is performed even when the release switch (S2) remains "ON".

When the camera body (BD) is activated by a signal from the signal line (B S l) of the back circuit (BCKC), automatic focus adjustment is not performed, but the voltage boost of the flash unit (PL) is The activation for starting the back circuit (BCKC) and the activation when a key operation is performed in the back circuit (BCKC) are distinguished in the activation pulse, and the back circuit (BCKC) is
When the key operation in C) is performed, an automatic focus adjustment operation may be 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 (r3Mc) to determine what the activation signal is based on, the back circuit (BC
The signal from KC) is a pulse with a width of less than a certain time, but if it is input to a separate input port from the switch (Sl), there is no need to take measures to limit the duration of the pulse. become.

Note that the back circuit (ncKc) 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. It may be possible to control the exposure time over a long period of time, or even 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 (1'3D) activates the 7 lash device (7).
By exchanging data with FL), boosting of the voltage of the flash device (FL) is started. by the way,
Since the flash device continues the external pressure for 15 minutes after starting the pressure increase operation, the pressure increase is very often continued even after the shooting of one group is completed. If the intervals between the groups are very large, the boosting after the shooting of one group is wasted, resulting in a waste of battery power. Therefore, when the shooting of one group is completed, the back circuit (B
CKC) sends data indicating that shooting for one group has ended to the camera body (BD) (for example, set the lowest bit of Bank ICP to 1"), and
D) When this data is input, the 7-nosh device (FL)
) (prepare the 0 bit or the 4th byte of the 3 bytes of data sent to the flash device (FL)), and the flash device (FL) uses this data. The boost operation may be stopped upon input.

Next, the relationship between the function and display of the buck (B CK ) and a specific example of the buck 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 adjustment 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 with the memory key.

Figure 6 shows the operating state on the external display, and the EXPO
The P and mode of the 3URE7 function are 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, aperture values, mode names, messages for operating procedures, etc. (17) is Shirtasbi -
・Indicates the display position of the do value <T> and the fringe value <F>. (18
) displays the mode selected in the EXPO8URE77 function. (19) shows each function name, and each time you press the function key (6),
PO8URE→(MULTI-M)→(BRACKET
)→IMPRINT→ .

INTERVAL-B&W-+EXPO8URE-+・
It will move on to... The MLJLTI/M function and the BRACKET7 function are skipped and cannot be selected when the EXPO8URE function is not executed.

In addition, the EXPO8URE77 function can only be realized when control data from the meter (MET) is input from the camera body (nD) when the EXPO8URE77 function is in the execution state, and the function key There is no choice Xiaomi. (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 is displayed with the ``[l'' symbol, and if the shutter speed value is F32 or higher, it is displayed with the ``='' symbol.

(24) is a graphic display section, and (25) is a photometric line, which will be hereinafter referred to as an EV line from 4■ indicating an equal EV value.

(26) indicates the P1 mode with a slope of 2/3, which is a high-speed program in the program line. Depending on the lens, the limit is Fl, 4 on the wide open side, and F22 on the deep side,
Further, arbitrary print restriction is performed between F2 and F8 and Fll. In the character display section, lowercase numbers indicate 1/4 EV units, and a control point <1/60, F 4 +1/4 EV>, which is the intersection of the 6-hoo program line and the EV line, is displayed.

FIG. 7 shows the P2 mode in which the slope of the program line is 1/1, 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 1EV pitch on the exposure time side so that they are aligned in a straight line. Table 1 shows transitions between 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 of the seven movements will be explained.

FIG. 9 shows the P2 mode of EXPO8URE7 Anxine9. Use the FUNC key (6) to move the -” mark to select the EXPO3URE function, then use the MODE key (7) to move the character display (
16) Display the mode name "PROGRAM2" and set it to P2 mode. The mode display section (18) of the EXPO8URE7 function has a "ma" mark on the top of "P".
The mark is lit. In the graphic display (24), the camera shutter speed control limit is 1/40
00 seconds and 30 seconds and lens control limits F1.4 and F2
2, the program line is restricted. In addition, the slope part of the program line is 17250 seconds and F in the initial setting state.
It passes through point 5.6. Next, the OPE key (8)
When you press , the E
21) lights up, and the EV line (25) according to the photometric value also lights up.
appears. Next, press the ENT key (9), and the mode name display (PROGRAM2") will change to the control display (hereinafter 0UT).
(referred to as PUT display). In this case, the shutter speed value at the intersection of the program line and EV line] 760 seconds and F2.8 are displayed on part of the character (
Figure 11). When the 0UTPUT display is displayed, the inclined part of the program line can be shifted by pressing the Ur) key (11) and DOWN4- (12). The fjS12 diagram shows a state in which the UP key (11) has been moved to the right. Next, press the ADJ key (10) to display the settings (hereafter IN
The screen changes to the PUT display (called PUT display) and first asks for the FMAX value. In FIG. 13, the FMAX value shows F22 due to initial setting. F by DOWN4-(12)
When the MAX value is lowered to F8, the slope of the program line stops at F8, as shown in FIG. 14, and a restriction is added. After setting the FMAX value, press the ENT key (
9) to proceed to FMIN. 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). , F2.8 in Figure 16
is set. Next ENTI-(9)
When you press , the message "COMPLETED" indicating that the settings have been completed will be displayed on a portion of the character. When the completion display appears, switch to the 0UTPUT display again using the ADJ key, and the camera control value will be displayed on the character display (
Figure 18).

Next, the S mode (shutter speed priority mode) of the EXP OS tJ RE 7 mechanism will be explained.

"S" on the MODE key (7): "S" on the recharacter display
MODE" display and select ε; mode.
The screen is displayed as shown in FIG. Here, press the OPE key (
8), it is in the execution state.

(Also, depending on the lens, it is limited to 1/1.4 and F22.) OUT key (9)
When you switch to the display, an underline (cursor) will appear in the shutter speed value display area of the character display area (16).
is displayed (rjS20 figure). Underline is UP
N-(11) Yes! , tDOWNJf-(12)L:YO') indicates that the numerical value can be changed. UP key (
11), when changing from 17125 seconds to 17500 seconds, the result becomes as shown in FIG. At the same time, the fringe value also changes to the appropriate exposure value.

Next, the A mode (aperture priority mode) of the EXP OS tJ RE 7 mechanism will be explained. By pressing the MODE key (7), the character display section “AMO”
When the "DE" display is displayed and the 'Otsu A mode is selected, the display is shown as shown in Figure 22.○The PE key (8) is pressed to enter the execution state.The camera also displays the "[@"] ) and 174,000 seconds. When you switch to the OU "l'PUT" display using the ENT key (9), an underline will be displayed in the aperture position display section of the character display section (16), and the numerical value will be displayed. This shows that changes are possible (Figure 23).

U]) key (11) from F5.6 to F 11 +2
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 mode (manual mode) of the EXPO8URE7 movement will be explained. When the MODE key (7) is pressed, M MODE'' is displayed on the character display section (16) and M mode is selected, the display is as shown in Fig. 25.The OPE key (8) enters the execution state. Also, the shutter speed and aperture are limited by the camera and lens.If you switch to the 0UTPUT display with the ENT key (9), it will look like the $26 diagram.

At this time, a line of 7 digits is displayed on the shutter speed value display section, indicating that the value can be changed (26th line).
figure). 171 from 1/250 seconds with UP key (11)
If the time is changed to 000 seconds, it will become as shown in Fig. 27. Next, use the cursor key (13) to move the underline (cursor) to the aperture position display area (Figure 328), then press the DOWN key (1
If you change from F5.6 to F2.8+2/4EV according to 2), it will look like the f529 diagram.

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.

Explain EXPO3tJRE7 Ancchitane's long time mode to J. When the long time mode is selected by displaying "M MODE/L, T" on the character display section by pressing the MOT)E 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 attached to the aperture display section, indicating that the aperture value can be changed, but the cursor keys (13) are disabled, and changing the shutter speed value (long time) is 0UTPUT.
This cannot be done on display. Next, press the ADJ key (10) to
When the display is changed to PUT display, the shutter speed value can be set as shown in FIG. 32. The shutter speed value (long time) can be set within the range of 10 seconds to 99 seconds.
The time is 90 seconds and can be set in 10 second increments.

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 DOWNN- (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 (io).

The camera control value is displayed on the character display section (1
Figure 35).

Next, the AVERGE mode in which the average calculation of the MULTI-M (multimetering) function is performed will be explained. This MULTI-M77 union is EXPO
It can be set using the FUNC key (6) when the 3URE7 function is in the execution state. While the EXPOsURE7 function is in the running state, select the MULT I-M77 function using the FUNC key (6), then select the MULT I-M77 function.
Press the DE key (7) to display the mode name "A VE RG E" on the character display section (16).
Set to AVERGE mode (fjS36 figure). Here, the mode of EXP OSURTE 7 Anxyan is set to P mode according to the mode display. OP
It is in execution mode with the E key (8), and it is in the execution state with the M key (1).
4) makes it possible to incorporate photometric AFL. The index from -6 (EV) to G (EV) indicating the controllable range is displayed in the 14th part of the graphic display.
Displayed on CD. In addition, the graphic display section has an index display (“
-1'') and an indicator display (■■■■'') indicating out of linkage are displayed on the left and right sides. From the above-mentioned indicator located in the middle of it, -.
The display of 2 points (“■”) is the first photometric point 1, which is usually located in the middle (0 position 1). When 0UTPUT is displayed using the ENT key (9),
Due to the tjS1 photometry point, EXPO8URE7
The shutter speed value and aperture value calculated in the P mode (for example, P2 mode) of the camera are displayed on the character display section (16) (FIG. 37). At this time “AV
Display “A” of “ERGE” in the middle and press “AVERAGE”.
Indicates that it is in the mode. Next, when you operate the M key, the value of the first photometry point, which is one step above the index, will be
The 1-point display ("-") moves one step below the music note 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 photometric point of the imported ftSi becomes AE-locked, and the character display section (16) shows the EX
The mode selected in the PO3URE77 function (
The shutter speed value and aperture value calculated in P2 mode this time are displayed. When you operate the M key (14) again, the value of the second metering point is imported, and the value of the first
The second photometering point moves to a balanced state with respect to the 0 position reference, and the character after display calculates the average of the photometering point values of f51 and m2, and then displays the shutter speed value and aperture value in P2 mode. Calculated and displayed (
m39 figure). At this time, the photometry point of fIS3 is +1t
It appears one step above the J index display. Below, M key (
By sequentially operating 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 Pt51 point, and the latest 8 points will be displayed. It is possible to import and calculate. 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, when the MODE key (7) is operated, the character display section (16) is OUT.
The PUT display changes to the mode name display, and “CE N
The CENTFj? mode is a mode that calculates the average of the MAX and MIN values of the photometric values, and in the graphic display section, the photometric value taken in from the index display based on the zero position is displayed. M of point
The points indicating the AX value and the MIN value move to the balanced position (FIG. 42). Next, by pressing the ENT key (9), the OUTPUT display is displayed, and the character display section (16) displays the calculated shutter speed value and aperture value, and between them the CENTER mode == CI Full display t
Z (ffi43 diagram). H again by MODEN-(7)
The mode changes to I G HL I G HT mode, and “I-(I CI-I L I G H
At the same time, the point display indicating the MAX value of the captured photometric point will increase by +2.
．． The photometric point display is moved to the 3Ev position, and the entire photometry point display that has been taken in is moved based on the point display indicating the MAX value (Figure 1.44). At this time, minus 6Ev
The photometric points that protrude further are displayed at the position of minus 6 Ev by the number. Next, press the ENT key (9) to
UTPUT is displayed, and the shutter speed value and fringe value calculated based on the highlight standard and the HIGH value in between are displayed.
HL I G HT mode I(” is displayed on the character display (Fig. 45). Press the MODE key (7) again.
), the mode changes to S H A D OW mode, and the mode name "S I-T A DOW" is displayed on the character display section.

The point display showing the MIN value of photometry point 1 that was captured at the same time moves so that it is at the minus 2.7 Ev position, and the entire photometry point display that was captured moves based on the point display that shows that MIN value ( Figure 46). At this time, the number of photometric points 1- that protrude from the plus GEv are displayed at the position of the plus GEv. Next, press the ENT key (9) to display 0UTPUT, and the shutter speed value and fringe value calculated based on the shadow reference, and "S" for SHA D OW mode are displayed on the character display section (No. 47). figure). MODE again and again
When the key (7) is operated, the mode returns to the AVERAGE mode and the sequence is repeated. The MULTI-M function has other modes in addition to the modes described above. E .M
In the AN II AL mode, the control value is only the set value in the M mode of the EXPO3URE7 function, 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.

0UTPUT is displayed by pressing the ENT key (9), and the character display section (16) displays the shutter speed value and aperture value, which are the set values, and "M"
is displayed (Figure 50). Since the mode is activated by pressing the OPE key, photometric points are loaded by pressing the M key in the same way as in the other modes. Figure 51 shows one piece;
FIG. 52 shows a state in which two data are captured, and FIG. 53 shows a state in which eight data are captured. In these cases, the character display section (16) remains unchanged at the set value. As shown in Figure 53,
The graphic display allows you to judge the photometric distribution for a certain subject at a glance. Here, press the UP key (11) or D
By pressing the OWN 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 the shutter speed value representation area is underlined, 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 luminance distribution of the subject, and furthermore, it is possible to arbitrarily change the width of highlight and shadow exposures, which are fixed at 2.3Evv2.7Ev. If you move the underline to the aperture value using the cursor keys, the aperture value will be changed. In the above description, the most appropriate point in the photometric distribution map can be determined by arbitrarily changing the shutter speed value or fringe value using the UP key (11) or the DOWN key (12). By moving the index display to the 0 position, you can set the appropriate value for the subject at your own discretion. In other words,
MANUAL of this MULT I-M77 link
In commonly known terms, a 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. 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,
It is displayed that the P mode is selected in the E77 function, 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-M77, but it is also possible to provide a different index. An index indicating the shift range is displayed on the graphic display section. Also, BRACKET77
The link is in a non-executing 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, OP
The E key (8) is in the execution state, and therefore, the graphic display section (24) displays a new display showing the operating state of the BRA CK E T 7 r function in the same shift range below the index 1111. appears. Next, A.D.
) key (10)! :yo') OLJ TP tJ'
When changing to r display J: '1INPLJT display, 1
Q57 As shown in Figure 57, the character display section (16) first displays a message F to set the start value of the shift.
fl OM" will appear. Here, if you change the underlined value to the desired value using the UP key (1]) or the DOWN key (12), the index and the operation display will change to It moves as shown in Figure 58.Next, by ENT4-(9), the message "S T E P" which sets the shift in progress appears on the character display section (16) (Figure 59).Shift +11 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, by pressing the ENT key (12), the message "FRAME" appears on the character display section to set the number of seven frames to be shot, as shown in FIG.

When you use the UP key (11) or the DOWN key (12) to change and set the underlined value (97 frames this time), the width of the index and the operation display will be displayed on the graph ink display section. shifting star 1
The shift range is displayed continuously from the value to the final shift value (Figure 62). Next, by pressing the ENT key (12), the character display section (16) will display "'COMI)LETE".
A message “D” will be displayed to inform you that the setting is complete.-
At this point, if you operate the ENT key (12), "FR" will be displayed again.
Return to OM" and repeat each setting display. ADJ key (io)
As a result, the INPUT display changes to the OUTPUT display, and the character display section (16) displays the amount of deviation from the reference value and the number of remaining frames (64th
figure). The next time you release the camera, the light metering value at that time will be locked, and the exposure value for each of the 7 frames will be shifted based on the light metering value.
The mode selected in the function, this time P mode (
P.

P2. The camera is controlled by converting the shutter speed value and aperture value calculated in one of the following modes: In Figure 65, the camera is released once and the character display section (16) displays the amount of deviation from the reference value of the exposure value controlled by the next release and the remaining number of 7 frames. . Then, the graphic display section (24
) changes in the operation display to display the range from the next control (exposure) value to the final (g output) 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 frames in the character display section (16) is “
1'' is displayed, indicating that there are 17 frames remaining, and only the final value is displayed on the graphic display section (24).

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 where photometric values can be imported, the display state becomes the same as the ttS64 diagram, and the camera can be repeatedly controlled. When the BRACKET7 function is in the execution state, the display on the external display section (2) is set to EXPO8U.
When changing to the RE7 function and executing the BRACKET7 function, if the EXPO8URE7 function selects P, S, or A mode, the Ev line will move parallel to the program line in the graphic display section. , and when M mode is selected, the aperture line moves in parallel, so BRA
It can be easily confirmed that the CKET77 function is being executed.

Next, the imprint function will be explained.

When the imprinting function is selected by operating the FUNC key (6), the mode becomes an exposure control data imprinting mode, and when the PE 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 switch to year, n, and lo modes.
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 (7th
Figure 2). If a photograph is taken in this state, the data of this character display section (1G) will be imprinted. Also, if you press the ADJ key (10) in the state shown in Figure 72, the data will be changed.
If function is activated, and a cursor is displayed in the data display area for the year (Figure $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 mouth data from the 12th to the 15th. If the ADJ key (10) 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). 0 for up key (11)
→１→・・・・・・→9→−→Blank→0...th...
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 at the up count of 1,000, the mode enters the down count mode, with the mode name displayed as shown in FIG. Below, set the initial data in the same order as the up count mode, and complete the settings 11. The display force of ν is the 82nd
It is a diagram. In both of these modes, the data that is sequentially changed and imprinted on the shooting 1 (shot 1) screen is
6) will be displayed.

When the Mo1)E key (7) is pressed in the down count mode, the fixed data imprint mode is entered and the display state shown in FIG. 83 is obtained. If you press the ENT key (9) below, Fig. 84, A
Press the D or J key (10) to display the fjS85 diagram, then press the cursor key (13), up key (11),
By pressing the down key (12) in combination, the data is changed as shown in FIGS. 86 and 87, and when the ENT key (9) is pressed, the state shown in FIG. 88 is obtained.

In this mode, unless the 0PEN- (8) or MODE key (7) is operated, the set 11-standard data will be imprinted.

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 if the B&W7 function is not selected, it is an imprinting function for color film. Note that when the B&W7 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. In the interval function, the interval time, the number of 7 frames at each interval shooting (hereinafter referred to as
7 frame number), the number of interval repetitions (hereinafter referred to as group number), and the first release start time of interval shooting (hereinafter referred to as start time) can be set.

No. 8911 indicates the mode name display of the interval function. In non-execution state, ENII-(9)
is disabled. Also, graphic display% (24)
is not displayed in this function.

When this interval function is put into an execution state by 0PEN-(8), execution starts toward the starship time. Also, if you want to execute the interval's first Lullies immediately, select 01? rl-<8)
By leaving it in the running state and releasing the camera, starship time can be canceled and starship can be performed. Next, press the ADJ key (
10), the 0UTPtJT display changes to the INPUT display, and as shown in the f59θ diagram, the display state first becomes such that the interval time can be set. Character display g (1
9l-INTI・:RVAL time “■” is displayed on G), and the hour・
“H (Hour), M (M
1nute).

The characters "S (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), move the changed point using the cursor key (13) and set the interval time (Figure 91).The interval time is 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" is displayed, indicating the 111th setting of the hour, hour, and minute.
(Date), I-1 (Hour) + M (M
1nure)" will be displayed together with the numerical value. Press the UP key (11) or DO to select the underlined numerical value.
Change with the WN key (12), move the changed point with the cursor keys, and set the start time. Next, by pressing the ENT key (9), the character display section (1G) will show "Co MP L E T E D" 7E indicating that the setting is complete. :
Change L (figure omitted), then press I with the ADJ key (10).
The NPUT display is changed to the mode name display again (
Figure 95). As a result, when starting the interval function, press 0PEN-(8) to enter the execution state, and press ENT key (9) to enter the OUTPUT
When the T display is selected, the start time is displayed on the character display section (16) as shown in FIG. After the interval fjS release is actually released, the character display section (16) displays the remaining time until the next release in hours, minutes, and seconds (8, M, S''). 197
figure).

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), exchanges data with the calendar microcomputer (CAMC) and display microcomputer (DMC), and exchanges data with the camera body (BT). (C.A.M.
C) is a calendar microcomputer, which also controls calendar 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 Fig. 5, switch (CL) is a switch that is closed by operating the memory clear key (15), and (CU R) is a switch that is closed by pressing the memory key (14) in Fig. 5. The switch (E N T ) is made rA by operating the cursor key (13), and the enter key (
(UP) is a switch that is closed by operating the up key (11); (DW, N) is a switch that is closed by operating the up key (11);
is a switch that is closed by operation of the grand key (12). These six switches are controlled by a control microcomputer (CMC).
), and is also connected to an interrupt terminal (INTB) via an AND circuit (AG). Therefore, even if the control microcomputer (CMC) has stopped operating, when any switch is turned "ON", the control microcomputer (CMC) starts operating. Further, the switch (OPE) is a switch that is closed in conjunction with the operation of the operation key (8), (FUN) is a switch that is closed in conjunction with the operation of the function key (6), and (A
DJ) is a switch that is closed in conjunction with the adjustment key (10), and (MOD) is a switch that is closed in conjunction with the operation of the mode key (7). Since these four switches are connected only to the input ports of the control microcomputer (CMC), even if these switches are turned ON, the control microcomputer (CMC) is not activated.

-95= Next, the operation of the control microcomputer (CMC) will be explained based on the chart 70 of the control microcomputer (CMC) in FIG. 99. First, from the camera body (BD) to the signal line (CS
B) falls to “Lou+”, the interrupt terminal (INT
The operation starts from step A) of No and O.

First, since the camera has been activated, the signal line (B S l
) is set to "High", then an interrupt operation by the interrupt terminal (INTA) is enabled, and then it is determined at which timing the interrupt signal is input from the camera body (BD). That is, in step No. 2, it is determined whether the state is waiting for data input, and if it is in the state waiting for data input, it is determined whether imprint data (TVtAv) or calculation data has been input in N093. Determine by step. This is because the signal line (C3B) is “Lour” as described above.
”, the signal line (BIO) is “High” for calculation data and “Lour” for imprint data, so you can tell.Then, imprint data is input. When it is determined that
The sent data is read and it is determined in step No. 5 whether the forwarding function is selected. No. If it is determined in step 5 that the forwarding function is not selected, No.
, move to step J5. On the other hand, if the forwarding mode 7 is selected, No, the process moves to step 6 and the data corresponding to the selected forwarding mode is sent to the direction L.
Sends to the ED drive circuit (LDR). In this operation, a synchronization number 43 is sent to the signal line (C3LD), and data is sequentially sent 4 bits at a time. Then, the signal line (LDEN) is set to “Lova” and the drive circuit (LDR)
When the display operation is performed, the light emitting diodes (LED) of the segments are dynamically driven according to the wrap-around data, and forward feeding is performed. Then, the control microcomputer (
CMC) performs run 1 for a time corresponding to the film sensitivity read from the camera body. In addition, 1. t. Even if the read film sensitivity is the same data as the forwarding function, different (interval) times are counted.

And when the count ends, huh? No. line (LDE
N) is set to "Higl+" to stop the imaging operation by the drive circuit (LDR). Note that when the trailing curtain starts running in the camera body (BD), a "Lou+" pulse is output to the signal line (C8B). Therefore, at this time as well, an interrupt signal is input to the interrupt terminal (INTA), and since data input is not being waited for at this time, the process moves to step 11 (No). If it is determined in step No. 11 that the rotation operation is in progress, the process moves to step No. 10, and the signal line (LDEN) is set to "Higb".
Forcibly stop rotation operation. This prohibits the rotation operation from being performed even during film winding.
No.

In step 15, press the switch on the camera body (S CN
) is “ON”. And switch (S
If the switch (SCN) is "ON", do not perform steps 16 to 2 and move to step 40. - On the other hand, if the switch (SCN) is "OFF", then proceed to step 40. Determine whether it is in up mode.And,
If it is the count up mode, 1'' is added to the register CR in which the loop data is set, and the process moves to step No. 40.

On the other hand, if it is not the count-up mode, it is determined whether the count-down mode is next. 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, it depends on whether the bracket function is 1, or if it is a bracket function, subtract "1" from the register BR where the frame number of the bracket function is set
, Step 4.0 ＼, If it is not a bracket functitan, go to No, step 40 as it is. Note that even when the switch (SCN) is ON, the data circulation is turned on, but when the switch (SCN)
) is provided at the opening of steps No, 4 and No, 5, and if the switch (SCN) is “ON”, it immediately turns No,
Alternatively, the process may proceed to step 40.

No, step 3 indicates that the data is not looped (signal line (
When the BIO) is determined to be 1-1iH1+"), the process moves to step No. 25 and data is read from the camera body. And when the exposure function is selected, step No. 27 is selected. The process moves to step 2 and waits for the signal line (BIO) to become "Low".

Then, when the signal line (BIO) becomes "Lou+", back ICP ("80H") is output. When this back ICP is input to the camera body (BD), the signal line (
BIO) is set to "High", the signal line (C8B) remains "Lou+" and waits for the control microcomputer (CMC) to perform the calculation, and when enough time has elapsed for the calculation to be performed, the signal line (C8B) is set to "Lou+". BIO) “LoIll”
shall be. The control microcomputer (CMC) outputs the back ICP at step No. 28 and performs the operation of the exposure calculation subroutine. When the calculation operation is completed, wait for the signal line (BIO) to become "Low", and then
”, it sends the aforementioned control data (Tv, Av), exposure control mode, out of linkage, release enable/disable, etc.N.
o. Move to step 40.

When the camera body (BD) starts operating, the pulse output to the signal line (C8B) activates the control microcomputer (CMC), or when the trailing curtain starts running. When inputted, if the direction is 77, or if the imprinting operation has been completed, the process immediately moves to step No. 40. Switches (M), (CL).

(CUR), (ENT), (UP), (DWN) are 'O'
When the signal becomes "N" and interrupt No. 18 is input manually to the interrupt terminal (IN"f"I3) or the operation due to the interrupt from the interrupt terminal (INTA) is completed, the operation starts from step 40. .No, in step 40, reset the timer register (for counting operating time) T R, and set the flag IOF, which determines whether data is input or output from the calendar microcomputer (CAMC), to "1") uNo , 42
Move to the next step. No, in step 42, determine whether the flag IOF is 0'', and if it is "1", read the data from the calendar microcomputer (CAMC), reset the 7-lag IOF to 0, and go to step 47. - On the other hand, if it is determined in step 42 that the flag IOF is 1, the data is sent to the current microcomputer (CAMC) and the flag IOF is set to 1.
Set it to No, and move to step 47. The data transfer method is to connect the signal line (C8CA) to “Lou+”
When outputting data, the signal line (Ilo) is set to "■, otu", and when inputting data, the signal line (Ilo) is set to "I-I i g h". When the signal line (C3CA) becomes "LoIU", an interrupt is applied to the calendar microcomputer (CAMC), and a pulse for data exchange synchronization is output from the calendar microcomputer (CAMC). In synchronization with this pulse, 4-bit data is sequentially exchanged via the data bus (DI3USI). The data sent from the calendar microcomputer (CAMC) to the control microcomputer (CMC) is 1:09:01 on September 1, 2017, and 1:02 at the time until the start of the next shooting operation for interval shooting. In addition, there is data indicating whether interval photography is in progress and whether interval photography 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 when using the interval function, and also creates data for displaying the remaining time until the start of the next shooting operation. If input, the interval function will be canceled. In addition, the data sent from the control microcomputer (CMC) to the calendar microcomputer (CAMC) includes the start of interval shooting 1], hour, minute, hour, minute, and second indicating the interval of interval shooting, the number of groups for interval shooting, and the interval. There is data such as the number of frames taken, exposure time set in M/LT mode, whether the interval function is selected, and whether 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 state of the switches (M) to (MO+)) and the state of the control microcomputer at that time, and the answer is No.

At step 49, set line 43 (I3 S +) to “1”
．． , oll” and start the camera body and press No. 50.
Move to the next step. This subroutine No. 48 is shown in FIGS. 103 and 104, and the detailed operation will be omitted since the relationship between the operation of each key, the setting data, and the display has 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 microcomputer (DMC). In this operation, first, the signal line (DEN) is set to "Low" and the display section (S D
), (D D ), and (CD ) are in operation, then close the signal line (C8DM) with "Lou+" to notify the display microcomputer (DMC) that data will be output, and then close the signal line (D CK 2). A synchronizing pulse is output from the 4 bits, and data is sent 4 bits at a time. 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, although the enable terminal is used in the figure, when the signal line (DEN) becomes "Loiu", the display section (S D
), (CD), and (DD).

Once the data transfer is complete, NO! It doesn't matter which of the switches CM) to (MOD) are turned ON in step 2; if they are turned ON, reset the register TIR and select which switch Also ON
”, add “1” to the contents of register TIR and move to step No. 55. Then, No.
In step 55, the contents of register TIR are set to a constant value "I".
If it has not reached 4K, the process goes to step 42 and repeats the same operation. And no.

At step 55, the contents of register T T If become “K”
When it is determined that the signal line (D E N) is set to "I-l-1i" to stop the operation of the display section, and to enable operation by an interrupt signal to the interrupt terminal (INTB), the operation is stopped.

FIG. 100 is a flowchart showing a specific example of the calculation subroutine of NO, 29 in FIG. 99. First, it is determined whether or not the bracket function (Platin) 77 is selected, and if it is not selected, the A7 lug is reset. If it is selected, it is determined whether or not the bracket function is being operated. Otherwise, the A flag is sent. Then, after resetting or setting the A7 lug,
Calculate the Ev value 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
) is imported, and if so, it is set as an external function and the meter (MET
) as the control value. Note that when the control limit is exceeded, the limit value is used as the control value, similar to 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 mode, and if it is in this mode, the manually set Tv and Av are output. - If the mode is not M, M/LT mode, determine whether multi-function is selected next, and if multi-function is selected, calculate the control Ev value based on the stored Ev value. do.

A subroutine for this multi-function calculation is shown in FIG. 102. When in center mode, the maximum Evmax and minimum Ev of the stored Ev values.
Find min, and from these two values (E vmax + E
v+n1n)/2 to find the control Ev. If it is not the center, it is determined whether it is the highlight mode, and if it is the highlight mode, the calculation of E vmax -2,3 is performed on the maximum value of stored Ev, and the control Ev
Calculate. If it's not highlight mode, what about shadow mode? Apart from that, in the shadow mode, E vmi is set to the minimum value Evmin of the stored 1.
The calculation of n+2 and 7 is performed to calculate the control Ev. If it is not the shadow mode, it is the average mode, and in this case, the calculation (Σ Evk)/n (n: number of stores) k=1 is performed to determine the control Ev.

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

Then, based on the obtained control Ev, P, , P2. P
3. Calculation is performed depending on which mode is selected, A or S mode. A specific example of this calculation subroutine is shown in FIG. This calculation is first performed as follows: E vmax (= T vmax + A vmax) <
EV.

E vmin (= T vmin ten A vmin)>
When E v, the control is not interlocked, 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 it is within the interlock, the operation is performed in the order shown in the flowchart, the control value is calculated, the out-of-interlock flag is reset, and the main routine (t51oo diagram)
Return to 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, the limit aperture value can be set (not the maximum aperture value or the maximum aperture value).

When the control Tv and Av are determined, it is important to check whether the flag A is set to "1" or not. If it is set to "1", the bracket function is selected and no calculation is performed. Then, the process moves to the calculation operation for bracketing. Further, even during the bracket function operation, the process shifts to the bracket operation for the next photographing. First, M
, M/LT mode, and if the mode is M or M/LT mode, the aperture value is shifted by the number of frames (the number of next shooting) gJ, and the flag is reset).

On the other hand, P 1=r' 2. E in P, -A, and S modes
v 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 A v. In this way, T V, A vlJ' f
(When it is output, the bracket function is selected, shooting for the set number of frames is completed, and it is determined whether the signal line (BS2) is "LOIII" or not. Then, it is changed to "Lou+". If so, a release disable signal is set to prevent the photographing operation from being performed, and if the above conditions are not met, the release disable signal is reset and the process returns to the main routine.

FIG. 105 is a flowchart showing the operation of the calendar microcomputer (CAMC). First, the signal line (IP) of the camera body (BD) becomes “Loud” when the exposure control operation starts.
”, the interrupt operation by the interrupt terminal (INTA> is started. Then, in step STI, the timer interrupt (l
sec) and moves to Sr1. In step ST2, the switch (SCN) is “'ON”
If it is “ON”,
Step 5 without performing interval and M/LT operations.
Move on to T20. - Power, switch (SCN) is “'O”
FF”, it is determined whether it is interval shooting, and if it is not interval shooting, it is then determined whether it is M/LT mode.

Then, in M/L, T mode, the signal line (B
S2) is closed as "Lou+", and if the mode is not M/LT mode, the process directly proceeds to step 5T20.

When it is determined that it is interval shooting in step Sr1, the remaining time until the start of interval shooting is reset, and the signal line (BS2> is set to "Low". Then, the number of frames is set. register IFR
If the contents of the register IFH are not 0'', the process moves to step 5T20.On the other hand, if the contents of the register IFR are 0, then the number of groups is set. Turn off 1 from register IGR and set it to “0”
Determine whether it has become . Then, if it is "0", it sets the interval end signal, and if it is not "0", it sets the remaining time.Then, it determines whether it is in M/LT mode or not. (
If so, close the Iligb line (11S2) and enter it in M/LT mode.
remains "Low" and proceeds to step 5T20.

Then, interrupts to the interrupt terminals (rNTA) and (INTB) are enabled, and it is determined whether the 7-lag TTF is "1".If the 7-lag TTF is "1", this operation is in progress. This means that a timer interrupt has occurred, TIF is reset to 0'', 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 (CS CA) to 'Low' for data exchange, the calendar microcomputer (CAMC) connects the Sr15 interrupt terminal (IN
TT3). Sr15 enables timer interrupts, and then determines the state of the signal line (Ilo>) to determine whether to output or input data.Then,
For data input, data from the control microcomputer (CMC) is read in step Sr17. And M/L
If the T mode is selected and the M/LT mode is not in operation, exposure time data is set, and if the M/LT mode is not selected or counting is in progress in the M/LT mode, the process directly proceeds to step 5T30. 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 but is in operation, leave it as is, 5
The process moves to step T20. On the other hand, when the interval function is selected and the operation has not started, the number of frames is stored in register IFH, the number of groups is stored in IGR, and the time interval between groups (remaining Q interval) and start time are set. Sera 1 and move to step S'l' 20. When it is determined that data is to be output at step Sr1G, the data mentioned above is sent to the control microcomputer (CMC) and Sr1
Move to step T20.

When a timer interrupt occurs every second, the operation starts from step 5T40, and the X111I input terminal (INTA), (I
NTB), set the 7-lag TIF to “1゛1”.
and return to the previous flow of operation. On the other hand, if such operations are not performed or their (INTA
), 5T45 when the operation by (I NTl3) is completed.
Perform the operation from step . In step 5T45, 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 (1'v timer), and it is determined whether the Tv timer has reached "0". If it is not "0", proceed directly to step 5T62 (rNTA).

(INTB), enables timer interrupts and stops operation. On the other hand, if the content of the Tν timer is “0” in step 5T48, the signal line (13S2) is set to “H”.
igh'', the rear curtain starts running in the camera body (BD), and the process moves to step 5T62.

If it is determined in step 5T46 that the M/LT mode is not in operation, it is then determined whether an interval photographing operation is being performed. Then, set the signal line (BS2) to "'HiHI" during interval shooting.
+” and moves to step Sr12.

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

If it is determined in step ST55 that the interval function is selected, the process moves to step 5T56, where it is determined whether it is one minute before the start of one group shooting, and if it is one minute before, the signal line (BSI ) to ■, o
Ill'' pulse is output to activate the camera body (BD) and start boosting operation of the flash device (Fl,).In this case, the signal line (BS2) is
'll1HI+' is output, so calculate the time until the start and move to step Sr12. On the other hand, S
r5 If it is determined in step G that it is not one minute in advance, then it is determined whether it is the start time for one group's shooting, and when the start time is reached, the Irebo No. 43 line (BS 2) is LoILl'' and the process moves to step Sr12. On the other hand, before or after the start, "Loud" is applied to the signal line (n S2).
Check whether tV is outputting or not, and if “Loud” is being output, one group is in the shooting operation, so immediately 5
The process moves to step T62. On the other hand, if "High" is output to the (il B; line (BS 2)), the shooting operation for interval shooting starts +1iI or between groups, and in this case, the remaining time until the start is calculated. Then, the process moves to step Sr12.

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), and used for graphic display by the display microcontroller (DMC). It is converted into data and serially transferred to the LCD segment driver (SD). LCD segment driver (SD)
It has a built-in display RAM, and this LCD display RAM
1 bit of data corresponds to lighting/non-lighting of 1 dot on the liquid crystal display (LCD). After the graphic display data is transferred to the LCD segment driver (SD), it is stored in the LCD display RAM.
LCD segment drive signal (S G
T ), LCD segment driver (S D )
h' la FII product display n (1-CD) Ni' J El. The LCD common driver (CD) uses a built-in oscillator to generate timing signals necessary for display, and also automatically scans the common signal of the liquid crystal display (LCD) according to the display duty. C
M T ) is output to the liquid crystal display section (L, CI')).

LCD segment drive i (SGT) and I-CD
:1mon scanning signal (CM T ) is from ■, CD common driver (CD) to LCD segment driver (SD)
It is synchronized with the synchronization signal (TRS) supplied to J:. The liquid crystal display (LCD) uses these two signals, namely the LCD segment drive signal (SGT) and the LCD
A common scan ID (CMT) provides a dot matrix graphic display. The reference power source (DD) for driving the LCD provides a stable power source (VDP) for driving the liquid crystal display (LCD) to the LCD segment driver (SD) and the LCD common driver (C
D).

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).See the 70-chart of the display microcomputer (DMC) below. This will be explained in more detail.

First, from the control microcomputer (CMC) to the display microcomputer (DM)
The display microcomputer (DMC) starts operating and starts supplying power by the signal line (DEN) to C), and starts the reset routine shown in FIG. 106 (Step 2). In step 2, the LCD segment driver (SD) is initialized, and the LCD segment driver (SD) is initialized.
D) 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 the full lighting mode is used is for a disconnection test at the factory. Turn on the display (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 a flag for displaying an imprinting indication ("IM F") for a certain period of time during imprinting. After starting with the imprint signal (II') from the camera, step ■), saving the register in step CD, and setting the "IMF" display flag in step [phase], restore the register in step ■ and restore it in step @. to return to the main routine.

Figure 108 Main routine is performed by the control microcomputer (CMC)
A signal (C3DM) is sent from the display microcomputer (DMC) to the display microcomputer (DMC) until all processing within the display microcomputer (DMC) is completed at step tD.
Prohibit restart of the main routine, input the transfer data from the control microcomputer (CMC) shown in Table 2 in step 2, check the power supply voltage in step [stock], and if the power supply voltage is below the specified value, , Step 0 sets the power supply voltage check flag (B, C, 7 lags).

At step ■~step 0, the control microcomputer (CMC)
Decodes the data transferred from the computer into graphic display data.

This decoding is first performed on the character display section (16) (step ■), and the mode name display, I NPU
It is converted into graphic display data corresponding to each display content such as T display, OUTPUT display, etc.
This data is output to the LCD segment driver (SD), and the L
CD display RAM i: written (step [
phase]). Subsequently, the indicator indicating the control range and the mode display section (18) are decoded in step [phase], and the L
It is output to the CD segment driver (SD) (step ◎).

Next, the index (22) indicating the shutter speed value, the finger 12 (23) indicating the aperture value, and the symbol (21) indicating the execution state of each function are decoded into graphic display data (step O). In step O, the B, C, and 7 lags determined in step ■ are tested, and if B, C, and 7 lags are set, the battery check display (B, C,
display) (step (0□).

--12,0- If the B, C, and flags are not set, depending on which function is selected in the external display, an operation corresponding to that function is performed in step O, and furthermore, this function itself The finger +2 (20) indicating 1 is decoded in step 0>, and these graphic display data are output to the l-CI') segment driver (SD) in step 6. 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. Then the exposure mode (P llp 2.p 3.S, A).

M, M/LT) according to the setting line (26) @109
71. Follow the steps from Figure to Figure 114. i (.P,,P2
．． When the P3 mode is selected, in Fig. 109, the minimum aperture value Avmax of the lens, the maximum aperture value Av+nin of the lens, and the setting limit value Av on the side of fine print of the lens are shown.
ns Assuming the setting limit value Avon on the open aperture side of the lens and the selected slope Avp, the procedure shown in @110 diagram is T.
Draw Avy while changing vx. To explain briefly, first, in step ■, set Tvx=-〇, 5,
Line segment ■ is drawn in step ■, and then line segments ■ to ■ are drawn while incrementing Tvx (steps ■ to ■). Finally, a line ■ is drawn with T vx == T vmax (step ■). P,,P2. Setting line in P mode, Figure 6 - The calculation of (26) is above, Avp line in PL and P3 mode, Figure 109 - Line segment ■
The slope is 2:1 and 1:2, so if you draw it in the same way as in P2 mode, the slope will be step-like and difficult to understand. Therefore, in the P and P modes, this point is devised so that the points (Tvx, Avy) obtained by calculation are lined up on a - straight line (see Fig. 6.8). FIG. 111 shows how to draw a setting line in S mode, and Tvn is the setting shutter speed. Draw a line (line segment ■) of A vy = A v + l1in while incrementing Tvx in steps ■~■, then T vx ” T vn
Draw a line (line segment ■), draw a line segment ■ as T vx" T vn (step ■), and finally increment Tvx by 1 again and draw the line Avy = A vmax (
Remove the line segment ■). Figure m112 shows the setting line aperture in A mode, and Avn is the setting aperture value. In steps ■~■, set Tvx=-0,5, draw a line segment ■, and in step ■, while incrementing Tvx,
= line Cm of Avn) is i in step (ij)
” Set vx = T vmux and draw a line segment ■ respectively. Figure 113 shows how to draw a setting line in M mode. While incrementing Tvx by 1 in steps ■ to ■, draw the line Avy = Avn ( Line segment ■), in step ■ I' vx= T vn and A vy= A
Remove the line (line segment ■) from v+1lin to A vy = A v+aax. Here A vn, T v
n is a set aperture value and a set shutter speed value, respectively.

Figure 114 shows how to draw the setting line in M/LT mode, setting Tvx = -0,5 in steps ■- and ■.
A vy=A vmin to Avy=l~V III
a Line (line segment ■) up to X with step ■
Draw a line (line segment ■) of AVV"Avn while incrementing ν× (.Also, the setting line for M/LT mode can be drawn using the exact same procedure as for M mode. The above is the graphic display section in the exposure function. This is the calculation method.

Next, the calculations of the graphic display unit when the multi-function is selected on the external display will be described. At this time, the finger 8X (hereinafter abbreviated as ΔEvx) from -6 to +6 indicating the range from control has already been decoded so that the liquid crystal display (LCD) lights up in step [phase] of FIG. In addition, the index (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 Eves and the Ev currently being measured is Evo.
qIf the number of stored data is n, then the point P currently being photometered in step ① in Fig. 115. (ΔEvo, 5'O), then line L. (Step ■). Point Pi (ΔEv+++
Plot yn+). However, 1≦n≦8, 2≦■≦9
．． This situation is shown in FIG. 115 as a 70-chart. The above is the calculation method of the graphic display section in multifunction.

Next, the operation of the graphic display section when the external display is displayed and the bracket function is selected will be explained. Indicator indicating the amount of deviation from proper exposure -6 to +
6 is decoded in step [phase] of FIG. 108, like the multi-function, so that the liquid crystal display (LCD) lights up.

In Table 4, the current point is ΔEvCONT1 setting start point is Δ
If EvSET, then in step ■ in Figure 116, ΔE
Find vmax, and in step ∆Evx = ∆EvSET
Line from to ΔEvx - ΔEvmax (LSET)
, and in step ■, ΔEvx = ΔEvCONT to Δ
Line to E vx = ΔEv + aax (LCONT)
draw The above is the calculation method of the graphic display section of the bracket function.

As described above, when the calculation on the graphic display section is completed, the process proceeds to step 0 in FIG. 108, and the symbol (2
0) is decoded and output to the LCD segment driver (SD) in step ◎ together with the decoding result in step O and the calculation result in step O. Step O-
At step O, the "IMF" flag indicating that imprinting is in progress is tested, and if it is set, "IMP" is decoded into a subcharacter and output to the LCD segment driver (SD).

In this way, all graphics display data is decoded and output to the LCD segment driver (SD).
When the serial data is transferred to
Processing 1 loop ends. After that, the control microcomputer (CM
The display microcomputer (DMC) enters the standby state for the interrupt signal (C8DM) from C), and when the interrupt signal (C3DM) is sent again, the display microcomputer (DMC) starts the main routine again and repeats the steps described above. Now we move on to the next process for graphic display.

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

In the buck circuit (BCKC) shown in Fig. 98, power is supplied to the current microcomputer 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 battery check on the display microcomputer (DMC) (step [stock] in Figure 108) is as follows.
Both power batteries (A) and (B) are checked. If the power source battery (A) fails, the symbol (A) will be displayed on the graphic display section (24) as shown in Figure 117.
) and four batteries are displayed, and if the power battery in (B) is not working, the symbol (+3) and two batteries are displayed as shown in @i18 figure.

Here, the line with the slope in P1 mode (Fig. 109A
To explain how to draw the shutter
The method of displaying a line with a slope of speed value: aperture value = 1:2 is as shown in Figure 1119 (a) t (bL (c)
There are three possible ways. 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 for every 0.5 Ev step of the aperture value. Then, it can be displayed as shown in FIG. 119(a) or (b).The difference between FIGS. 119(a) and (b) is due to the way the shutter speed value and aperture value are rounded during display.

When displayed in this way, it is extremely difficult to understand the slope of shutter speed value: aperture value of 1:2 in %PI mode. Therefore, in this embodiment, as shown in FIG. 119(e), only the points for each iEv step of the aperture value are displayed,
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. Aperture value is Av≧0
．． 5, but in Tv≦−0, 5 and Av≧9.5, both are represented by the indicators “IEI” and “=”, so it is not accurate. Therefore, the Ev line is Tv≦−0,
5 and Av≧9.5, it is not displayed, and 11≧Tv≧0.
Only the range of 0.5≦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 (
26) and the Ev line (25), the control point is the intersection of the shutter speed value 11≧Tv≧0. Only the accurate range of aperture value 0.5≦Av≦9.5 is displayed. E
Fig. 120 shows a specific way to take care of the v-line. In this figure, first, in step ■, T vx=O(15e
c), and in step ■, A vy = E v
- Find T vx. However, Ev is the data No. in Table 2.

This is an automatically controlled Ev value of 14 to 15 and is a value sent from the control microcomputer (CMC'). In step (2), it is determined whether 0.5≦Avy<9.5 (1,2≦F<27), and if it is within this range, the point 'tcTvx is determined.

Avy) is 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 ■, Tvx>T
Determine v+nax (Tv=11), and if No, return to step (2) and repeat steps (2) to (2) below.

And when YES, that is, Tv>Tvmax,
Proceed to step ■ and finish. Incidentally, the step of incrementing Tvx may be 0.5Ev step.

In Figure 1, the control microcomputer (
BMC) is a serial input/output terminal (SOU).

All remaining circuits (flash device (PL), receiver (RFC)
, display unit (D S P ), lens circuit (LE, C),
AF open circuit AFC), 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),
The reason why (S IN) and (SCK) come out from the camera body (BD) is the terminal for the back circuit (BCKC) (
T , ), (T 2), (T )) and the lens circuit (L
EC) terminals (T I+), (T I2).

There is (TI3). And all the terminals are the back circuit (BCKC) terminal (T I L (
T2) T3) Therefore, a checker can be installed at the position of the back circuit (BCKC).

Then, from the checker side, the microcomputer (BMC) outputs the "Lou+" signal, which has a lower impedance than the "I-l-1i+" signal outputted to the signal line (C3B), and connects the signal line (C8B). Forced 'Lovl+
'', the gate circuit (G2) is always active, so data exchange with circuits other than the back circuit (BCKC) can be checked.
Check the lens circuit (LEC) terminal (TI
2)-(T I3) makes it possible to some extent.

Effect-1 (As described above, according to the present invention, a two-dimensional coordinate display means is provided in which one axis is scaled with exposure time and the other axis is scaled with aperture value, and the two-dimensional coordinates are displayed in accordance with the selected automatic exposure control mode. The display means displays a program diagram, a straight line indicating exposure control characteristics such as a set exposure time or a set fringe value, and a straight line indicating a calculated exposure value (Ev) according to the photometric value. How the combination of exposure time and aperture value changes depending on the selected exposure control mode and set exposure conditions, and how the exposure time and aperture value change depending on the photometric value are two-dimensional In addition to being easily visible as a graph, the combination of exposure time and aperture value that is actually controlled can be read from the coordinates of the intersection of these straight lines, and each straight line can predict the control value in response to changes in exposure conditions. easily displayed.

Further, according to the embodiment of the present invention, the numerical display means for numerically displaying the control value is arranged near the two-dimensional display means, so that the value on the intersection point can be easily and accurately determined.

According to yet another embodiment, when the photometric circuit is inactive, Ev
Since the straight line indicating the camera is not displayed, it is easy to see whether the camera is in operation or not.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the entire camera system to which this invention is applied, Fig. 2 J3 is a flowchart showing the operation of the microcomputer (I3MC) of the camera body (BD), and Figs. 4 and 5 are the back (BCK) ) external view, from Figure 6 tt
SB diagram is a diagram showing an example of the display on the display section (2), Figures 9 to 35 are diagrams showing the relationship between key operations and display in the exposure function 5, and tIS diagrams 36 to 54 are diagrams showing the relationship between the key operations and the display in the multifunction function. Figures 55 to 68 are diagrams showing the relationship between key operations and displays, and Figures 69 to 88 are diagrams showing the relationships between key operations, photographing operations, and displays in the bracket function.
The figure shows the relationship between key operation and display in the imprint function, Figures 89 to 97 show the relationship between key operation, photographing operation, and display in interval function sequence, and ttS98 figure shows the back circuit. (BCKC). Figures 99 to 104 are flowcharts showing the operation of the control microcomputer (CMC).
FIG. 5 is a flowchart showing the operation of the calendar microcomputer (CAMC), FIGS. 106 to 108 are flowcharts showing the operation of the display microcomputer (DMC), and FIG.
Figure 110 is a diagram showing how to display program lines in P mode, Figures 111 to 114 are S, A, M
, Figure 115 is a diagram showing how to display program lines in M/LT mode, Figure 115 is a diagram showing how to display in multi-function, Figure 116 is a diagram showing how to display in bracket function, Figures 117, 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. 24: Display means, AMM, BMC: Exposure control means, SM
O: mode selection means, DCM: first and second decoding means, DD, SD, CD: display driving means. Applicant: Minolta Camera Co., Ltd. Figure 2 Figure 7 Figure S Figure 1 '/10 0 (/t, xrtθ SoQ 1st Theta diagram TNT
INT B5Tl
5T25 possible Tl2 3r26YES9
CN input 〃T
35 sT3 NOTl2'l de'9
Out)jNθ
two sr4 s7
-15S'r2θhi,y ir N0tr sT5STt 5T29BS 24-
/-11,'; 2◆t T (IFR)-/
8cho 30ST7
N0rrR)・θ〃0 T37 Tl8 YES ' frR
, IGPGR)-/
t2 STQ
5T32 (TGR)・0N0 srt 5ISTIO start, Ri-Pal 4 each J Sera l, sn? Yr':s, T Tl3 B, S'2!4-/1 T2 1st O and figure 7eZ figure 1/Q figure 1// figure 112 figure 1/3 figure 1111 figure 1'05577" Figure 115 Figure 1/7 Figure 1/g

Claims (3)

[Claims] (1) A two-dimensional coordinate display means with exposure time on one axis and aperture value on the other axis, and a calculation means that includes a photometry circuit and calculates the exposure value based on the photometry value and the film sensitivity value. , an exposure control means that selectively performs automatic exposure control in a plurality of automatic exposure control modes based on the calculated exposure value, a mode selection means that selects one exposure control mode in response to manual operation, and a selected exposure control means. a first decoding means for converting an exposure control diagram showing exposure control characteristics with respect to subject brightness in a control mode into a signal for displaying the calculated exposure value in a straight line on the display means; 1. A display device for a camera, comprising: a second decoding means for converting signals into a signal for displaying images; and a display driving means for driving the display means based on signals from the first and second decoding means. (2) The display of the camera according to claim 1, further comprising numerical display means for numerically displaying the exposure time and aperture value determined by the exposure control means, and this is arranged near the two-dimensional display means. Device. (3) The display device for a camera according to claim 1, wherein the display drive means includes display prohibition means for prohibiting display based on the signal from the second decoding means when the photometric circuit is not activated.