JPS62115139A - Data imprinting device - Google Patents

Abstract

PURPOSE:To receive many data with a small number of terminals by sending data indicating a used film sensitivity value to a data imprinting device from a camera body as serial data. CONSTITUTION:When the imprinting function is selected, a back circuit BCKC starts the data imprinting operation. The camera body outputs a pulse having a time width corresponding to the film sensitivity ot a serial data input terminal T3 of the back circuit BCKC as serial data. A control microcomputer CMC generates data having the time width read from the camera body. When sending of an exposure time and an aperture value for control from the camera body is detected, a synchronizing signal is sent to a driving circuit LDR of an imprinting LED through a signal line CSLD for said time width to drive the LED dynamically, and data is imprinted. By this constitution, many kinds of film sensitivity data are received without increasing the number of terminals.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application of L-Sushi The present invention relates to a data imprinting device that is electrically connected to a camera body through a group of terminals that contact a corresponding group of terminals of the camera body, and in particular, The present invention relates to a data imprinting device that changes the amount of light emitted for data transmission according to the sensitivity value of the film.

In a data copying device that is electrically connected to the camera body via a terminal group that is separably connected to the terminal group of the camera body, a cam member and a switch are connected to the film sensitivity setting section of the camera body. It is also possible to turn on and off switches according to the film sensitivity setting, retrieve data corresponding to the set film sensitivity value from these switches, and use this data as light emission control data for data transmission. , was proposed in Japanese Patent Application Laid-Open No. 58-43440. In this device, the film sensitivity range is divided into multiple parts according to the number of switch J, and one data/event is assigned to the film sensitivity range of 1-], and the number of data is equal to the number of switches. It was uniquely stored according to the number of pieces. Further, a terminal group of the same number as the number of switches is provided between the camera body and the imaging device 6, and the binary data is transmitted to the imaging device as parallel data via this terminal group.

Solution 1 Shishi 1 Yoto Kan-1-Z +! ! J, MJ So: In order to transmit data indicating a larger number of film sensitivity values with this conventional device, it would be possible to increase the number of switches and terminals, but this also had the disadvantage of making the configuration complicated and impractical. Ta.

The present invention is electrically connected to the camera body via a 411 group that is separably connected to a corresponding terminal group of the camera body, and data indicating a film sensitivity value is transmitted from the camera body to this data. The present invention aims to provide a data input device that can receive a large amount of data with a small number of terminals, in which the amount of light emitted for forwarding is controlled accordingly. According to the present invention, data indicating the sensitivity value of the film used is sent as serial data from the camera body to the data input terminal via the serial data input terminal, and the data transfer V device receives this serial data. It is characterized in that the amount of light emitted for directing is controlled based on this.

Since the film sensitivity data is transmitted in series, there is no need to increase the number of data receiving terminals when transmitting a large number of film sensitivity data from the camera body to the imager.

Figure 1 is a block diagram showing the entire camera system to which this invention is applied. The part (BD) surrounded by a broken line is the camera body, and it is electrically connected to the camera body (BD) from the terminal (T1).
(BCKC), which is connected via (T,), has data imprinting function, interval shooting function, camera body (
This circuit has a calculation function for exposure control of the camera (BD).This circuit is installed on the camera back cover, and from now on this circuit will be
KC) is called the back circuit. Also, this back circuit (BC
The camera back cover with KC) is attached to the back (ncK).
It is called.

This back (BCK) is replaceable and detachable from the camera body (BD), and the camera body has a back cover that is equipped with a circuit that only has data imprinting function and interval shooting function, and It is also possible to attach a back cover that is not provided with a circuit having the functions of 1 to 3 in place of this back (BCK).

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

(MDR> is a motor drive device (hereinafter simply referred to as motor drive) that is connected to the switch (S, ) of the camera body (BD) via the terminal (T1°), and the exposure control operation is completed. When the switch (S,) is turned "ON", the motor in the motor drive (MDR) starts rotating, and the mechanical interlocking mechanism performs film winding and charging of the exposure control mechanism.Charging is then completed. Then, when the switch (S4) turns to '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 connecting 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. The motor drive (MDR) may be provided within the camera body (BD).

Camera body (BD) and terminals ('r',), ('rtz)
, (T, i) is a data output circuit provided within the interchangeable lens. This circuit (
LEC) is electrically connected by attaching an interchangeable lens to the camera body. Then, connect the camera body terminal (C
3L) becomes 'Low''°, it enters the operating state and sequentially outputs various data specific to the interchangeable lens in series based on the reading clock pulse from the camera body (BD).This data includes There are data for confirming the attachment of the camera, open aperture value data, maximum aperture value data, focal length data, characteristic data for automatic focus adjustment, etc. Details of this circuit and data etc.
No. 9-84228 and Japanese Unexamined Patent Publication No. 59-140401Lr, so the description thereof will be omitted.

(MET) is an external exposure meter (hereinafter referred to as meter). Camera body (r31)) and terminal ('r14),
(T 15).

(The circuit (RIF, C) connected at T16> is
This is a receiver that receives infrared optical signals sent from a meter (MET). Further, the circuit (PL) connected to the receiver (R, E C) and the terminals (T+7), (T+8), and (T19) is a flash device. The receiver (RE C) is attached to the hole 1 of the camera body (BD), and the flash device (FL) is attached to the hot shoe provided on the receiver (RE C). The connection will be as shown.

Incidentally, only the receiver (REC) or only the flash device (ff1r-) may be attached to the hot shoe of the camera body (BD). In addition, the terminal (
A group of terminals with the same functions as T14), (TI5), and (Tll,) are provided on other parts of the camera body (BD) other than the hot shoe (for example, the bottom of the camera), and the flash device (PL) and receiver are connected to the hot shoe. - (REC) may be directly attached, and the other of the flash device (PL) and receiver (REC>) may be attached to the other part via an adapter.

The meter (MET) can be used as an incident light type or reflected light type exposure meter, and can also measure steady light and flash light. 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 flash device (FL
) and whether or not to emit a test light, and also check whether the meter (ME
There is =7-data, etc. indicating whether control data is being sent from T). Data from infrared light sent from the meter (MI?, 'r) is sent to the receiver (11, E C).
is read and latched as an electrical signal.

Next, the signal lines (sT,), (s'r'2), (s'
Flash equipment related to r3)! (Ft,), the functions of the receiver (REC) will be explained together with the functions of the camera body (BD). First, the signal line (s'r,) is a line for transmitting a light emission start signal, and is a line for transmitting a light emission start signal.
When the contact (SX) closes when the front curtain (1C) completes travel, the flash unit W (pL> starts emitting light. Also, when the receiver (RFC) receives a test flash signal from the meter (MET), , the receiver (RE C) pulls this terminal (S'r+) to "Low" to start the flash device's light emission.The signal line (Sr1) is connected from the camera body (BD) to the flash device (FL). For data transmission, flash device (PL), receiver (RE)
It is a bidirectional serial data bus for data transmission from C) to the camera body (BD). Furthermore, a signal indicating that the X contact (SX) is closed and the flash device (FL) has started emitting light is sent from the flash device (FL) to the camera body (BD).
) has the function of transmitting information.

The signal line (sT3) transfers data from the flash device (PL) and receiver (RE C') to the camera body (BD).
), the mode in which data is output from the camera body (BD) to the flash device (FL), and the mode in which the camera body (BD) starts exposure control operation are controlled by pulses with different time widths. This is a line that transmits data from BD) to a flash device (PL) and a receiver (REC). Furthermore, the synchronization clock pulse for data exchange is transmitted from the camera body (BD) to the flash device (FL).
, the function of transmitting to the receiver (REC), and further,
It has a function of transmitting a signal to stop the flash device (FL) from emitting light from the camera body (BD) to the flash device (FL).

In the camera body (BD), the microcomputer (
(hereinafter referred to as microcontroller) (BMC) is the line (C8F
) is set to II L 0III+, the interface circuit (IF) enters a state in which data can be exchanged. When the camera body (BD) inputs data manually, when the microcomputer (BMC) outputs the pulse during the first time to the signal line (FMO), this pulse signal is transmitted to the signal line (ST, 3). The data is input to the flash device (PL) and receiver (REC) via the PL, and each enters data output mode. And the terminal (scK) of the microcomputer (BMC)
When the clock pulse for reading data is output from the interface circuit (IP), the signal line (
STs).

First, the flash device (PL) outputs 1 byte of data to the signal line (ST2), and this data is sent to the microcontroller (B
MC) data input terminal (STN). 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, and a signal indicating whether the flash device has been automatically dimmed. be. The 2nd, 3rd and 4th bytes are the receiver (
This data is also output from My:1 (BM).
C) is read from the data input terminal (SIN). 2
The data in the first byte is a signal indicating whether exposure control data is being sent from the meter (MET), a test flash signal, etc. The third byte is exposure time data from the meter (MET), and the fourth byte is the aperture value. data.When the above data input is completed, the signal line (C3F) goes 'High.
h”, flash device (FL), receiver (R
Data will no longer be exchanged with the EC.

When transmitting data from the camera body (BD) to the flash device (FL), connect the signal line (C8F) to the "Lou"
l” and outputs a pulse with the second time width to the signal line (FMO).Then, the flash unit (PL) enters data input mode, and based on the synchronization clock pulse from the camera body (BD), the microcontroller (BMC) ) reads 3 bytes of data from the data output terminal (SOU).

The first byte of this 3-byte data is the control aperture value (Av
) and the exposure control mode, the second byte is the sum of the film sensitivity and exposure correction data (S v + Cv), and the third byte is the focal pressure of the interchangeable lens, 111ff (rv). The data in the 1st and 2nd bytes are used to calculate and display the shooting distance range in which proper exposure is compensated by flash emission, and the data in the 3rd byte is for exchanging the irradiation range of the flash unit W (PL). This data is used to match the shooting angle of view of the lens.

When the camera body (BD) starts exposure control operation,
The signal line (C3F) is closed at 'Lo' and the pulse during the third time is outputted to the signal line (FMO).

Then, this pulse is read from the signal line (s'r,) by the flash device ff (PL), and the flash device (
FL) is a light emission mode for exposure control. When the actual exposure control operation starts, the signal line (RL) is
When a low pulse is output, the interface circuit (IF) controls the flash emission control circuit (FLM).
, the data from the signal line (s'r2) is given via the signal line (FST), and the data is sent from the circuit (FLM) to the line (
The signal input via the signal line (ST
3) Output. The signal line (ST2) outputs a 'Lou+'' signal until the flash device W (FL) starts emitting light, and changes to "High" when the flash device (FL) starts emitting light. Control circuit (FL
M) is equipped with a light-receiving element that receives the subject light that passes through the photographic optical system and is reflected from the film surface, and the signal lines (ST2) and (FST) change from "High" to -1t.
, oIII+, integration of the output current of this light receiving element starts. Then, the integral values are A-D, D-A
Film sensitivity (S) input from the conversion circuit (ADA)
When the value corresponding to the analog signal at the data output terminal Cv is reached by the exposure compensation amount (Cv) and the exposure compensation amount (Cv), the signal line (FSP
) outputs a "'High" pulse. This pulse is sent to the flash device (FL) via the signal line (ST3).
input and the flash will stop firing.

□Furthermore, when a pulse is input from the signal line (ST3) for data exchange, the flash device (PL) can perform a voltage 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 R pressure operation is performed for a certain period of time from that point onwards.

When using this function to perform interval shooting with flash photography, the camera body (BD) is
When the camera body (r31) is started, the flash device (FI
-), and a boosting operation is performed. Even in interval photography using flash photography having intervals of 15 minutes or more, the main capacitor of the flash device (FL) is fully charged before photography.

The above meters (MET>, receivers (R, E C),
Flash device (PL), interface circuit (IF
), a specific example of a flash light emission control circuit (FLM) is disclosed in a patent application published in 1973! Since it is described in No. J-201381, it will be omitted. Also, flash equipment? Specific examples of W (Ft,), interface circuit (Ir?), and flash light amount control circuit (FLM) are described in ``Unexamined Japanese Patent Publication No. 59-23.
It is also shown in Japanese Patent Application No. 1520, 1984-48C+5.

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 flowcharts of FIGS. 2 and 3.

(BA) is a power supply battery, and the 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 "O" with the signal from the output port (OPO) of the microcontroller (BMC).
When the transistor (BT) is turned on, the photometry circuit (FLM), (AMM), and A-D/D-A conversion circuit (A
DA) and the lens circuit (LEC). (
DSP> is a display circuit that controls photometry mode, exposure control mode, exposure time for control, aperture value for control, film sensitivity,
Displays the exposure compensation amount and flash device status. Also,
When the exposure time and aperture value are out of control interlock, the exposure time and aperture value at the control limit flash and a warning is displayed. This display circuit (DSP) is connected to the microcomputer (B) when the signal line (C8D) is set to II Lo, II.
MC) data output terminal (SOU) to the terminal (SC)
It reads serial data sent in synchronization with clock pulses from IO and displays based on this data.

(A M
'II i gl+'' from SM O)
This photometric circuit (A M M ) outputs a voltage signal obtained by logarithmically compressing the output current of the light receiving element.

The A-D, D-A conversion circuit (ADA) is connected to the signal line (A
When a 'Loud' pulse is output to DSTA), the output of the photometric circuit (AMM) is changed to A-D based on the clock pulse from the terminal (CKOUT) of the microcomputer (BMC).
Convert. Also, the signal line (C8A) is II Lo
When (A D M O) is 'Highl-' in ulI+, A- is synchronized with the clock pulse from the terminal (SCK).
The D-converted data is sent to the data input terminal (SIN) of the microcomputer (BMC), and the signal line (C3A) is =l L
oIllI+ (ADMO) is II L oIllI
+, read the data S v + Cv from the output terminal (SOU) and convert this data to 1.
)-A conversion and output to the light emission amount control circuit (FLM). Note that when the signal line (C8A) is "'Hi8h'", no data is exchanged with the microcomputer (BMC). (
G1) is a gate circuit, and the signal line (C8L) is “I”.
When it becomes L01llI+, it becomes active and the microcomputer (B
It becomes possible to transfer data from the lens circuit (LEC) to the lens circuit (MC).

(AF When is 'II-oulI+, 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 means for outputting pulses in response to the movement of the aperture member of the aperture, and these pulses are
It is input to the terminal (CKIN) of MC).

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. When the content of the counter reaches 0'', it means that the number of steps has been narrowed down by the planned number of stages, and when the counter interrupt is generated, a pulse to stop the narrowing down is output from output capo-1~(OPl2>) and the narrowing down operation is stopped. do.

(MGD) is a magnet circuit, and the signal line (R
When a pulse of +L0w++ is output to L), the release switch 1 is operated, and the aperture-down operation and mirror-up operation are started. I L 0IllI on the signal line (AP)
When a + pulse is output, the aperture magnet) operates,
Narrowing down operation stops. Lou on the signal line (IC)
When the pulse of "d" is output, the leading curtain latch release magnet operates and the leading curtain starts running.
When a "Low" pulse is output, the trailing curtain lock release magnet operates and the trailing curtain starts running.

(G2) is a game) circuit, and when the signal line (C8I3) becomes II Lo, ++, it becomes active and data can be exchanged between the back circuit (BCKC) and the main circuit (BMC). . The signal line (C3B) has the function of starting the back circuit (BCKC) and connects the camera body (BD
) becomes active and attempts to exchange data with the back circuit (BCKC), the back circuit (BCKC) also becomes active. Furthermore, the signal line (C3B) outputs a pulse of "L 0+11" when the trailing curtain starts running in order to prevent film winding while data is imprinted in the back circuit (BCKC). It is designed to 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). The signal line (BIO) is °“High”
When , the back circuit (BCK) is connected from the camera body (BD) to
C), and when "Lou+", 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 has a time width corresponding to the film sensitivity.

The switch (S,) is a photometry switch that is closed at the first step of pressing down on the release button, and starts photometry calculation operation. A signal line (B S l) is input from the back circuit (13CKC) in parallel with Manako's switch (Sl), and the microcontroller (BM) is also input from the back circuit (BCKC).
C) can be started. Buck circuit (rl
The activation signal is input from cKc) through the signal line (BSI) when the back circuit (BCKC) is operated and the back circuit (BCKC) operates, and when the shooting operation is performed during interval shooting as described above. There are two types: a case where the camera body is started to start boosting the flash unit (FL) one minute before starting the flash unit (FL);

The switch (C2) 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. Also, a signal line (1'3Sz) from the back circuit (BCK C) is connected in parallel with this switch (C2).
When performing interval shooting from the back concavity 1 to 3 (BCKC), shooting a predetermined number of shots (hereinafter referred to as bracket! shooting) with a fixed exposure value shifted from the appropriate exposure, the camera body (BD) performs a shooting operation. It is designed to transmit a signal to start the process. Furthermore, when shooting a predetermined number of frames (hereinafter referred to as the number of frames) during bracket shooting, the release switch (C2) on the camera body (BD) is set to “
Even if it is set to ``ON'', the transition to exposure control operation is prohibited from the back circuit (BCKC) side, and the release switch (C2) of the camera body (BD) is set to ``OFF''.
F", it is possible to move to the next bracketing section. Therefore, the back circuit (BCKC) is connected to the camera body (BD
), and if the release switch (C2) is turned "ON" after shooting the set number of frames with bracket shooting,
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, at the start time, the back circuit (BCKC) outputs a “Low” signal to the signal line (BS2) until the number of frames have been photographed.
The exposure control operation is performed by outputting the signal "1". When the shooting of one group is completed, the signal line (
BS2) is set to "High", the time is counted for the set time interval, and the remaining time is displayed. Then, when the remaining time reaches 0 seconds, the signal line (BS2) is set to "Loud" again and the number of frames is photographed. 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, if the release switch (S2) of the camera body (T3D) is closed, the set start time and time interval will be ignored. A photographing operation is performed. In other words, 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 (r+cr<c) will continue to hold one word line ( ns
2) is set to "'Loud'". Further, the same operation is performed when the release switch (S2) is closed before the set time interval has elapsed. In addition, the camera body (B
The number of photographic operations performed in D) is determined by the signal line (IP
) to input the number of pulses for data imprinting.
・It is determined by

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).Each mode is P→A-+
It changes in the order of M→S→P...

The switch (SIS) is a switch for setting film sensitivity, and each time this switch (SIS) changes from "OFF" to "ON", the film sensitivity changes in steps of 1/3 Ev until the upper limit is reached. After that, when the switch (SIS) changes from "OF" to "ON", it changes to the lower limit value, and when the switch changes from "OF" to "P○N" again, it increases again.

(SOR,) is a switch that sets the exposure compensation amount.
23, - The switch (SOR,) is 'OFF' and 'ON'
0 → 1/2 → 1 → 11/2 → 2 → 21
/2→3→31/2→4→−4→−31/2→−3→～
It changes in the order of 21/2→-2→-11/2→-1→-1/2→0.

(ST) is a switch for setting the exposure time, and each time this switch (S'T) changes from 'OFF' to 'ON', the exposure time changes to the shorter side in IEv steps. And when in S mode, 32 sec → 16 sec
e→8 sec→--→1/1000scc→1/20
00sec → 1/4000sec → 32sec --
------, j: changes to sea urchin, and in M mode, 32 sec → 16 scc → -・- → 1/2000 s
eC→1/4000sec→Valve→:12sec→・
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 aperture value, and when this switch (SA) changes from 'OFF' to 'ON', the aperture value will change from the maximum aperture value in 1/2Ev steps when the mode is A or M mode. The aperture value changes toward the maximum aperture value.Then, when the maximum aperture value is reached, the aperture value changes to the open aperture value.The above switches (SMO), (S
IS), (SOR), (ST), and (SA) are switches that are closed by operating operation keys provided outside the camera. In addition, switches (St), (S2),
(SMO), (SI S), (SOR), (ST),
(SA) are connected to the interrupt terminal (INT) of the microcomputer (BMC) through an AND circuit (AN), and therefore, when the data setting key provided outside the camera is operated, the release When the button is operated, the signal line (B S l) is also connected from the back circuit (BCKC).
, (BS2), if the microcomputer (BMC) is in a stopped state, the microcomputer (BMC) accepts this interrupt signal and starts operating.Switch (SCN) is a switch linked to a mechanical film counter.

This switch (SCN) remains ``ON'' until the film counter reaches the position where it indicates the number of frames taken, 1.
From the `` position onwards, it becomes OFF ''. The signal from this switch (SCN) is sent to the input port (IP?) of the microcontroller (BMC) and the back circuit (B
CKC). The microcomputer (BMC) performs exposure control using the shortest exposure time and maximum aperture value while the switch (SCN) is "ON". On the other hand, the back circuit (B CK
C) does not perform data imprinting operation even if a pulse signal is input from the signal line (IP) while the switch (SCN) is 'ON'.Furthermore, the back circuit (BCKC) is There is a function to add or subtract 1"° from the set value to the pulse 1 from the signal line (IP) input to the switch (SC).
Addition and subtraction operations are not performed while the switch (SCN) is "ON".If the pulse is not output to the signal line (IP) while the switch (SCN) is "ON", the buck circuit (BCKC) ), there is no need to check the state of the switch (SCN) to determine whether or not to imprint data or whether to perform addition or subtraction, and the terminal (T9) is also unnecessary. In addition, an electric film counter is used instead of a mechanical film counter, and when the film reaches the proper frame position (counter display is "1°"), the "LoIll'" signal is connected to the terminal. (T,), or furthermore, the pulse may not be output to the signal line (IP).

The switch (SAS) is a switch that turns ``ON'' and ``OFF'' in conjunction with the photometry mode switching member attached to the exterior of the camera, and this signal is input to the input port (IPa) of the microcontroller (BMC). , microcomputer (B M
C) is 'Lo' from the output port (oP7) to the signal line (ASMO) if the signal of Lou+"' is input.
ud" signal to set the partial metering mode, and display the partial metering mode on the display unit (DSP). On the other hand, if a "High" signal is input to the input port (IPa), the signal The line (ASMO) has “'Hi”
gh'' signal is output to set the average metering mode, and data indicating the average metering mode is sent to the display unit (DSP).The switch (S4) is turned 'ON' when the exposure control mechanism finishes the exposure control operation. This switch turns OFF when the shutter charging operation of the exposure control mechanism is completed, and the signal from this switch (S4) is input to the input port (IP9) of the microcomputer (BMC). Microcomputer (BMC)
If a ``Low'' signal is input from the switch (S4) of the shutters 27-, . . . , the exposure control operation will not proceed even if the release switch (S2) is turned ``ON''.

Note that the microcomputer (I) MC) outputs pulses at a time corresponding to the film sensitivity to the signal line (IP), but the back circuit (BCKC) shown in Figure 1
A time corresponding to the film sensitivity read from the camera body (BD) is created in the back circuit (BCKC), and data is imprinted for this time [11].

Therefore, the pulse from the signal line (IP) is used only as a signal to start the imprinting operation. However, it does not have the function of reading film sensitivity data from the camera body and creating a time corresponding to this data, and has a data imprinting section that imprints data while pulses are input from the signal line (IP). Since the camera back with a built-in camera back is sometimes attached to the camera body (BD), the microcontroller (B
MC) has such a function. The back circuit (BCKC) 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) enters the exposure control flow and before outputting pulses to the signal line (IP),
The exposure time and aperture value are always sent to the back circuit (BCKC). 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 the flowcharts shown in FIGS. 2.3. Switch (Sl)
, (S 2) (S M O), (S I S ), (S
OR).

Either (ST) or (SA) becomes “ON” or the signal line (B S
+).

When a signal of lI Low'l is input from (BS2), the output of the AND circuit (AN> is "'L 01+1'"
Therefore, the interrupt terminal (INT) of the microcontroller (BMC) is 1.
1 Lo, falls to ++. Then, the microcomputer (BMC), which had stopped operating, starts operating from step #0.

First, in step #0, a "Loud" pulse is output to the G"4 line (C3B), and the back circuit (BCK
Activate C), turn on the transistor (BT), and turn on the light metering circuit (FLM).
AMM), A-D, l)-A conversion circuit (ADA
), starts power supply to the lens circuit (L E C). Then, in step #2, the input port (IPI) is set to 'L'.
oul” signal is input and the tail signal is input or not, that is, the switch (
S2) is turned 'ON' or whether a release signal is input from the signal line (IIIs2) of the back circuit (BCKC).Then, input capo-1 to (IP
If the belief "Loud" is input in I), the process moves to step #3. In step 4L3, switch (
S, ) becomes "Ol"li'" and the charging of the exposure control mechanism is completed, and the switch is turned "OFF".
What happened? ), the exposure control operation cannot be started, so the process moves to step #10. On the other hand, switch (S,)
If it is "OFF?", then in step #4 it is determined whether flags R and LEF are "1". These flags R and LEF are data for exposure control (Tv, Av)
If the preparation is completed and the release prohibition signal is not input from the back circuit (BCKC), the release will be set to "'1".
If the data preparation is not completed or the back circuit (BC)
It is reset to "o" when a release prohibition signal (bracket I/input at the end of shooting) is input from KC). If the flag RLEF is "1'° in step #4, the flow shifts to the exposure control operation starting from step #110, and if the flag RLEF is 0", the flow shifts to step #10. If the "'Loul"° signal is not input to the input port (IPI> in step 2), the process moves to step #10.

In step #10, “Lo” is input to the input port (IPo).
ud" signal is input. If it is input, flags S and F are set to "1''; if not, S and F remain "0" and #12 is set. Move to step. This is “Loud” at the input port (IPo).
This is a preparatory operation for determining whether the input is from the switch (S, ) or the buck circuit (BCKC). Next, in step #12, the switch (SA
Depending on the state of S ), one of the partial and average light receiving elements in the photometric circuit (A M By repeating the serial input/output operation multiple times, various data are read from the lens circuit (LEC), and then in step #14, the data is read from the clock output terminal (CKOUT'). Start outputting the A-D conversion clock and connect I to the signal line (ADSTA,).
Output the pulse of I L o II + j' and set the photometry aperture 1/3
(AMM) output A-D.

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

Next, in step #20, it is determined whether flags S and F were set to °1'' in step #11, and if they are set, proceed to step #21; if not, go to step #24. Move to step .Flags S, I
? is not set, it means that the switch (S,)
, the operation is not based on the signal line (BS+) of the back circuit (BCKC), and in this case, the signal line (AFEN) is “High”
"" and set flag S+F to "0" in step #25.
0°' (in this case, it has already been reset to 0°') and the process moves to step #26. on the other hand,
When flags S and F are "1" in step #20, the input port (IPo) is turned off in step #21.
This is because the back circuit (BCKC) starts the boost operation of the flash device one minute before interval shooting, or because the back circuit (BCKC) is in operation for exposure calculation. When starting the camera body (BD), a "'Low'" pulse is output to the signal line (B s +) in order to start the camera body (BD).By the way, the back circuit (BCK
When the camera body (BD) is activated in accordance with C), it is undesirable for the automatic focus adjustment operation to be performed and the lens to be moved inadvertently.

Therefore, the back circuit (BCKC) is connected to the camera body (BD).
When starting up, the time period from the time when the interrupt signal is input to the microcontroller (BMC) to step #21 is shorter than the time, and the time to step 4110 is longer than the time required.
．． A pulse of oI11'' is output to the signal line (B S +), and the input port (IP.) is output at step #21.
At the time of determining whether or not I-OWI+, the signal line CBS,) is at "High".In this case, in step #24, the signal line (AFEN) is set at "T-( igh'" to disable the automatic focus adjustment operation, and proceed to step #25 and then step #26.

On the other hand, in step #21, input capo-1-(IP,) is “
When it is determined that I L O, ++, the photometry switch (Sl) is turned on, and in this case, the signal line (A, FIEN) is turned on.
l", and set the automatic focus adjustment circuit (ΔI?C) to f↑
:, set the signal line (C3AF) to "Low" and send the data for automatic focus adjustment, return the signal line (C8AI") to 'T (igl+"), and then set the flag SIF to "o" in step #25. Go to reset 1 and move to step #26. In step #26, data is read from ζJ, the flash device (FL), and the receiver (HrE C'). This operation is performed as described above. , set the signal line (C8F) to 'I L oIII+ and output a pulse of the first time width to the signal line (F M O). Then, serial input/output operation is performed. First, the above-mentioned 1st byte data, then 2nd pie 1st to 3rd bytes, 4th byte of the aforementioned data read from the receiver (REC) and the meter (MET)
Data is output in the order of the byte, and this data is read. Then set the signal line (C8F) 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 "OFF" to "ON", and if it is determined that it has changed, the film sensitivity data is increased by 173E. Proceed to step #32. On the other hand, if it is not determined that there has been a change, the process immediately moves to step #32, and it is determined whether the exposure compensation amount setting switch (ORS) has changed from "OFF" to ○N'''. If detected, increase the exposure compensation amount by 17ZEv in step #33 and
Step 1: Move to step 15, and if no change 1 hit is detected, continue #
Move to step 34.

In step #34, it is determined whether the switch (SCN) is "ON", and if it is "Or・'F", then #4
Move to step 0. On the other hand, if the switch (SCN) is 'ON', the film counter will display the regular number of frames (
If the display state of 1"') is not displayed (S...), in this case, proceed to step #35. In step #35, the minimum exposure time (Tvmax) and the minimum aperture are Set the maximum aperture value (Avmax) for control, and set the flag RL E F to °1 in steps #1o8.
Sera in '°? -1, then move to step #75.

jThe back circuit (BCKC>
Even if the receiver (REc) reads the control data of Tm, I-1(l-1), the camera body ignores this data and
Exposure control will be performed.

In this case, exposure calculations are not performed on the camera body (BD), and settings other than film sensitivity and exposure correction amount data are not accepted. Furthermore, even if data for inhibiting the exposure control operation is input from the variable circuit (BCKC), it will be ignored.

In step #40, it is determined whether the flag BCKF is ``'1''. This flag BCKF is a buck circuit (BCKF).
KC) calculates exposure control data, sends this data to the camera body (BD), and uses data (hereinafter referred to as back ICP) for the camera body (BD) to perform exposure control based on this data. ) is read, it is set to "1", and otherwise it is reset to "0". Therefore, at the first operation, it is always “′0
°”, the process moves to step #41. On the other hand, when exposure control is performed based on data from the back (BCKF=1) #43 to #48
Step operation for changing data is not performed and the process immediately proceeds to step #51. Therefore, the switch (SMO), (
Even if ST) and (SA) are operated, no data is changed.

In step #41, the mode switch (SMO) is set to “O”.
Determine whether it has been changed from “FF” to “ON”.
When the change is determined, the exposure control mode is changed. on the other hand,
Switch (SMO) remains 'OFF' or 'ON'
’, the exposure control mode remains as is, and #43
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. At step #44, the switch (ST) is set to '○FF.
It is determined whether there is a change from "ON" to "ON", and if a change is detected, the exposure time is increased by IEv.

On the other hand, if no change in the switch (ST) is detected, the process immediately moves to step #46.

In addition, as mentioned above, the shortest exposure time (1/4000se
After c), the switch (s 'r) is 'Ori' l
When changing from "i" to "ON", the exposure time changes to the longest exposure time (32 seconds) in S mode, and the maximum exposure time (32 seconds) in M mode.
Changes into a valve. In step #46, it is determined whether the mode is A or M mode, and if it is A or M mode, the aperture value setting is not accepted (if it is J, the aperture value setting is not accepted, so the process goes directly to step #50; if it is A or M mode, it is not , in step #47, a change in the switch (SA) is determined.If there is a change, the process moves directly to step #50, and asks “”OFI?”
When a change from "'ON'" is detected, the aperture value is changed to 1.
．． /2Ev and move on to the next step #50. In addition, #30. #32. #41゜#44. To detect the change in switch #47 from "OFF" to "ON°', the state of the switch at that time is memorized at each step, and the state of the switch at the next step and the previous state are stored. It can be detected by comparing it with the stored signal.

In step #50, the signal line (C8A) is
oud”, then perform serial input/output operation, and
Read the converted data in series and connect it to the signal line (C3
A) is set to High'" and the clock output terminal (CKOU
The output of the clock from T) is stopped and the process moves to step #51. Then, in step #51, the flag BC
Determine whether KF is 1'' and if it is "1", #52,
The process proceeds to step #55 without passing through the calculation steps 53 and 54. On the other hand, if -39=flag B CK F is "o", the process moves to step 4t52, and it is determined whether a charge completion signal is input from the flash device (PL). If a charge completion signal has been input, exposure calculation for flash photography is performed in step 4153, and if a charge completion signal has not been input, exposure calculation for ambient light photography is performed. When the second calculation operation is completed, the microcomputer (BNC)
Shift to step operation. Note that specific examples of the calculations #53 and 54 are shown in, for example, Japanese Patent Laid-Open Nos. 1.11132/1982 and 140408/1982, and will therefore be omitted.

In step #55, the signal line (C3B) is set to “Lo”.
ud” and the signal line (r3-10) is
”, the data is transferred to the back circuit (IIcKc).The following data is sent from the camera body (nD).First, 1 by I is the data sent from the flash device, 2nd byte, 3rd byte, 4
The data from the meter (MET) read from the byte (J receiver (R, EC)) is input to the back circuit (BCK, C). When the exposure control data from the meter (MET) is determined, a display is performed based on this data, and this data is sent back to the camera body (BD) as control data. If the back circuit (BCKC) or the function that performs exposure calculation (hereinafter referred to as exposure function) is active at the time of input, which exposure mode (three types of P mode, S, A, M mode) and manual long time (M/
Even if LT) mode is selected, it becomes an external function and performs exposure control based on data from the meter (MET). Further, when the exposure function is in an active state, a function for storing a plurality of photometric values from the camera can be made active (hereinafter referred to as a multi-function). This function includes multiple stored photometric values (-), an intermediate value between the maximum and minimum stored photometric values ((B vmax + B
vmin)/2) (hereinafter referred to as center mode), a mode to determine the value (Bvmax-2,3) that reproduces the maximum value at the upper limit of film latitude (highlight mode), and a mode that reproduces the minimum value at the lower limit of latitude. There is a mode (shadow mode) that calculates the value (rl vmin+2.7>). Even if such a multifunction is active, if exposure control data is input from the meter (MET), it becomes an external function and the multifunction is activated. In addition, when the exposure function is active, the function that performs bracket photography (bracketing function) may also become active. At this time, if exposure control data from the meter (MIC'l") is input, When it is determined, the meter (M
Bracket photography is performed based on the exposure control data from E T ).

Backward Ml (1'3CKC) from camera body (BD)
The data of 5 bytes l-ff1l sent to is Δ-D-D-
A-change m times fi'1F (ADA>KJf+"+Y->I
's 1llll >e data (B y -A vo)
(A VO: open aperture value), the 6th byte is the lens circuit (
Open aperture value data (Av.) read from LEC),
The seventh byte is maximum aperture value data (Avmax).

Furthermore, the 8th byte is the shortest exposure time de (“pvmax”),
The 9th byte is the longest exposure time data (Tvmin), 10
The first bite is the synchronization limit exposure time data for flash photography (
The 11th byte is the exposure time data (Tv) determined by the camera body (BD), and the 12th byte is the aperture value data (Av) determined by the camera body. Furthermore, 13
The 1st byte is the film sensitivity (Sv), and the 14th byte is the exposure compensation amount (Cv). When the data transfer is completed, the microcomputer (BMC) of the camera body (BD)
moves to step #56 and connects the signal line (BIO)
Set to “Lou+”. Then the back circuit (BCKC)
One byte of data is sent from. This data is the aforementioned back ICP. If the exposure function is selected, the back circuit (BCKC) will be set to 80H, for example.
(H indicates a hexadecimal number), and if the exposure function is not selected, the back circuit (BCKC) will not output this data and the camera body (BD) will output "'0Orl". read. When J sales of this back ICP data is completed, the microcomputer (B
MC) is a signal line (CS13), (BIO
) is set to "'High"° and the process moves to step #57.

In step #57, it is determined whether the back ICP is "80H"°, and if it is not "ROII", it is determined that the camera back without a back circuit (BCKC) is attached or that the back circuit (BCKC) is not installed. This is a case where the exposure function is not selected. In this case, in order to perform calculations on the camera body or based on data from the meter (MET), flag l3 is set in step #58.
CKF is reset to '0' and the process moves to step #90.

If it is determined in step #57 that the back I CI) is "80H°", it means that the exposure function has been selected, and the process moves to step #60 and the flag +3 CK F] Then, in step #61σ), the process waits for sufficient time for the back circuit (BCKC) to calculate exposure control data based on the data sent to the back circuit (BCKC).

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 +1 Lo, TI. this is,
If multifunction is not selected, (Bv
Avo) + Avo = Bv, but if multi-function is selected, the above-mentioned average mode, center mode, highlight mode,
Calculation is performed according to the selected shadow mode. Note that when using multi-function, unless a memory operation (pressing the memory key) is performed, exposure calculation will be performed based on the data each time the photometric data from the camera body (BD) is updated. After that, control data is calculated based on the stored photometric data, and the camera body (BD)
The data from 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. This calculation is performed using the first program (p+) with a slope of 2/3, which divides Bv+5v=Ev into aperture value and exposure time at a ratio of 2=1.
mode (in principle, Av = 2/3・Ev, T”v = 1
/ 3 ・Ev), the second program with a slope of 1/2 (
P2) Mode (Av-1/2 ・Ev, Tv= 1
/ 2 □ F, v), 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, Ev-T is changed from Tv set by the back circuit (B (AKC)).
Calculate v=Av, and A mode is Ev from the set Av.
-Av-Tv is calculated, and M mode is set to A
v and Tv are calculated as control values.

Note that the calculated A vl)' A v> A vma
If x, EV-Avmax=Tv, if Av<AVo, calculate EV-AVo-TV, and calculate this Tv and Av.
max.

Alternatively, Tv and AVO are used as calculated values. Similarly, Tv<T
When vmin, Tvmin and E V−Tvmin=
Av as 'I'' v ) l'' vmax x then T
Calculate vmax and EV-T vmax=A v6f
Let it be C. Also, Pl.

In P2+P3 mode, Avo<AvI, A
Manually set A v + such that V2<Avmax,
Limit the aperture with AV2.

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

During this time, the signal line (BS2) is
r''', the trailing curtain is prevented from running, and when Karun I is finished (BS2> is set to 'High', the trailing curtain is run. Data is sent not for bulb display data but for setting time display data.If multi-function is not selected, the exposure control diagram and Ev value line for each mode will be displayed with the vertical axis as the aperture value and the horizontal axis as the aperture value. is displayed graphically on the back side as the exposure time.If multi-function is selected, each stored value and current value based on the exposure control value is displayed graphically.

Further, when a bracket function is selected, a control value is calculated that shifts the set shift amount by the number of frames at that time, using the calculated control value as a reference. Note that the graphic display at this time displays the current shooting position in the form of a bar graph. Details of the display using the second exposure function will be described later.

Additionally, if it is determined that there is a charging completion signal in the data from the flash device input via the camera body, the back circuit does not perform the above-mentioned calculation display, and the camera body (BD ) from T v , A v
is displayed and that data is used as control data. This means that the calculation for flash photography (step #53) on the camera body side is
As shown in No. 9-111132, etc., the back circuit (B
This is because there is no need to perform any particular calculation for flash photography on the CKC side.

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 multi-function, a calculation combining a bracket function and a flash 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, sets the signal line (BIO) to "I L 0Ill++," and performs serial input/output operations. , the back circuit (B CKC
). 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
I, P2. P3 is P mode, M, M/LT mode is M mode, external function is meter photometry mode), 1,
The 2-byte control data includes non-motion data indicating that Ev is limited to a limit value because it is out of control interlock, data indicating whether to prohibit exposure control operation (release prohibition data), etc. After reading this 4-byte data, the microcontroller connects the signal line (CS B), (B I
O) is set to "I-I i H1+", and in step #63, the read Tv and Av are set as control data.Then, it is determined whether or not the release prohibition data has been read, and if it has not been read. If it is not read, set the flag RLEF to "1", and if it is not read, reset the flag R, L E F to 0°' and #7
Move to step 0.

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

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

Next, in step #76, the film sensitivity and the exposure correction amount are displayed, and then, based on the data sent from the flash device (PL), whether or not flash photography will be used is displayed. Next, in step #78, the signal line (C
3F) is set to "'Low" and outputs a pulse during the second time to the signal line (FMO).

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

The microcomputer (BMC) firstly stores the control aperture value and exposure control mode in the first byte, the data (Sν + Cν) that adds the film sensitivity and exposure compensation amount in the second byte, and the focal length of the interchangeable lens in the third byte. Data (fv). The method of using these data is as described above.

When the above operations are completed, the switches (S l), (S 2), (S M O), (S I
S＞.

It is determined whether at least one of (SOR), (ST), and (SA) is closed. If even one is closed, the timer is reset and started in step #80, and the process returns to step #2 to repeat the operations described above. On the other hand, all of the above switches
? If F"', then in step #81, it is determined whether the timer count time (10 seconds) started in step #80 has ended, and if it has not ended, repeat #2.
Go back to step. On the other hand, all the above switches are
#85 when 10 seconds have elapsed after turning OFF.
Move to the next step. Then, in step #85, an interrupt is enabled to the interrupt terminal (INT), and the flag RLEF is set.
and reset BCKF to 0, and change the display to “OFF”.
”, the power supply transistor (BT) is turned OFF, and the microcomputer (BMC) stops operating.

When it is determined in step #57 that the back ICP is not "'80H", flag B is set in step #58.
CKF is reset to "0" and the process moves to step #90 in FIG. In step #90, the meter (ME
The receiver (RFC) reads exposure control data from T), and determines whether the camera body (BD) has read this data. When it has been read, the process moves to step #91, and when it has not 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 minimum and maximum exposure time for continuous light photography. For flash photography, limit it to the sync limit and maximum exposure time. Then, the meter (M
The data from ET) is set as a control value, the exposure control mode is set to M mode, the photometry mode is set to meter 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. Note that setting the control aperture value in #63°92.100 corresponds to setting the number of aperture stages (Av-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 "'○N", and when it is not limited, the warning display is set to "0FI7".
Then, the flag IILEF is set to "°1" and the process moves to step #75 in FIG.

In step #2, the input capo-111P+) is “Loud”
If the switch (S,) is "or't" and the flags R and LEF are "1", the exposure control operation is performed from step #110 in FIG. First, in step #110, the signal line (A F T3N) is set to 'JIiH1+°' to stop the operation of the automatic focus adjustment circuit (AI"C), and then the release signal is transmitted to the flash and ff (F+,). do.

This operation sets the signal line (C8F) to “Loud” and
This is done by outputting a pulse with a third time duration on the signal line (FMO) and setting the signal line (C3F) high again.The flash device (PL) detects when the pulse during this third time is input. When it is determined that
u+'', control exposure time data and aperture 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, the back circuit starts a data imprinting operation if the imprinting function is selected. Some of the imprint functions include control data mode, year/month/day mode, month/day/year mode,
There are day/month/year mode, month/date/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 function is selected) or the control data sent from the camera body (BD) in step #112 is imprinted. Year/Month/Day mode, Month/Day/Year mode, Day/Month/Year mode, Day/Month/Hour mode, Day/Hour/Minute mode 1, Hour/Minute/Seconds mode are each based on the buck circuit (BCKC). Print each data from the calendar circuit in order of mode name. Up mode and count down mode print a value obtained by adding or subtracting 1° from a preset fixed value each time a photograph is taken. Fixed data mode imprints preset values.

The microcomputer (BMC) then performs step #113,
The signal line (C8A) and (ADMO) are set to 'L01g', and the added data of film sensitivity and exposure compensation amount (S v +
Cv) to the A-D-D-A conversion circuit (ADA).

When the circuit (ADA) reads this data 5v-1-Cv, it performs D-A conversion and outputs the flash light emission amount control circuit (FLM).
). Next, set the film sensitivity on the timer to control the imprinting time, and in step #115 set the signal line (I P) to "Low" and turn on the back circuit (B
It is possible to determine the start of data imprinting such as CKC).
To start the imprinting operation of a data imprinting device that does not have an imprinting time control function. Then, interrupts by the timer are enabled and the timer starts counting. Then, in step #120, enable the counter interrupt, output a 'Low' pulse to the signal line (RL) to operate the release magnet, and start the aperture operation and mirror up operation. Then, at #122 Wait for sufficient time to complete the mirror up operation in step .During this time, the aperture pulse output circuit (APG)
) is input to the clock input terminal, and the number of refinement stages data preset in the down counter is
It is subtracted every time a pulse is input. Then, when the contents of the counter reach 0"', a counter interrupt occurs and #
150 steps are performed. In this step,
A "Low" pulse is output to the signal line (AP) to operate the aperture magnet and stop the aperture operation.Then, the timer interrupt is enabled and the process returns to the main routine.

Also, if an interchangeable lens that cannot control aperture is attached or no interchangeable lens is attached, the counter interrupt may not occur, so if a certain period of time has elapsed in step #122, step #123 will occur. Then, the counter interrupt is disabled and the process moves to step #125.

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

In step #126, the signal line (IC) is set to ``Lo''.
Output a pulse of u+”° to operate the front curtain magnet and start running the front curtain. Next, the exposure time is set to 1-
and when the callan I is finished, the signal line (2C)
A pulse of "' L oul'" is outputted to operate the trailing curtain magnet to start running the trailing curtain, and the process moves to step #135. #] If it is determined in step 25 that it is a valve, the process moves to step #130,
Run the front curtain.

Then, the input signal to input capo-1-(IPl) is “)(
Wait until it becomes ``right''. At this time, the back circuit (B
CKC) is not installed, wait for the release button to be released and the switch (S2) to turn OFF.
When the switch (S2) is turned "OFF", the trailing curtain starts running. On the other hand, the back circuit (BCKC) is installed,
When M/LT is selected, the signal line (IP)
The buck circuit (BCK
C) has started counting the time and the signal line (B
s2) is set to "Low"'. When the count of the back circuit (BCK C) is completed, the signal line (B S 2) is set to "High" and the
) causes the trailing curtain to start running at this signal. Like this M
/In LT mode, it is not the time when the front curtain starts running,
Exposure time counting starts with a signal input from the camera body (BD) via the signal line (IP), and 1
Since the exposure time is controlled using seconds as the minimum unit, the exposure time is not precisely controlled, but since the overall exposure time is long, the error does not have a large effect on the exposure.

Normally, the timer corresponding to the film sensitivity has finished counting up to step #135, and when the timer finishes counting to step 1, a timer interrupt occurs and #1
In step 45, set the signal line (IP) to 'Higl+°
The imprinting operation is stopped as °, the counter interrupt is enabled, and the process returns to the main routine.

In step #135, when the exposure time is short, even if the trailing curtain starts running, the signal line (I P) is
There are times when it's ll"". Therefore, in order to forcibly stop the imprinting operation (to prevent imprinting during the second roll), the signal input (IP) is set to High. Also, #136 In the step, in order to stop the imprinting operation by the back circuit (BCKC), a "Low" pulse is sent to the signal line (CSB) for a certain period of time, and the back circuit (BCKC) When input from (C8B), the imprinting operation is aborted. Then, counter and timer interrupts are not accepted, and when the trailing curtain has finished running, switch (S,
) becomes "'ON'". And the switch (
When S, ) turns ON, flags RL E F , B
Set CKF to O°', return to step #2, and perform the above operation.

When a continuous shooting mode such as interval function, bracket I, or function is selected in the back circuit (BCKC), -I is output from the signal line (BS2).
The L o and I+ signals remain input, and the above-mentioned exposure control preparation operation is performed even during the winding operation, and as soon as the winding is completed and the switch (S, ) is turned OFF, the next An 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 (BS+) of the back circuit (B CK C), automatic focus adjustment is not performed, but the boost of the flash device (FL) is The width of the starting pulse is distinguished between activation for starting the back circuit (BCKC) and activation when a key is operated on the back circuit (BCKC).
When the key operation in C) is performed, an automatic focus adjustment operation may be performed.

In addition, there is a buzzer that warns of camera shake, etc., which is not activated when activated by the back circuit (BCKC), but activated when activated by the photometry switch (Sl). In addition, the back circuit (
The input from 130K C') is a pulse with a width of less than a certain time, but if you input it to a separate input port from the switch (S,), you can limit the duration of the pulse like this. Such measures become unnecessary.

Note that the back circuit (BCKC) allows exposure time control longer than the maximum exposure time of the camera body only in M/LT mode, but if the exposure function is selected, Long exposure time control may also be possible in the mode, or may be made possible when an external function is selected.

Also, during interval shooting, a start signal is sent to the camera body (BD) one minute before the start of the shooting operation for one group, and the camera body (nD) exchanges data with the flash device (FL). Boosting of the flash unit (FL) is starting. By the way, since the flash device continues to increase the pressure for 15 minutes after starting the pressure increase operation,
Very often, boosting is continued even after imaging of one group is completed. If the interval between groups is very long, boosting the voltage after one group has been photographed is wasted, resulting in wasted battery power. Therefore, when the shooting of one group is completed, the back circuit (BCKC) sends data indicating that the shooting of one group has been completed to the camera body (BD) (for example, the lowest bit of the back ICP is set to "1"' When this data is input, the camera body (BD) sends a boost prohibition signal to the flash device (FL) (the 1st to 4th byte of the 3 hide data sent to the flash device (FL) The flash device (FL) may stop boosting operation when this data is input.

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

FIG. 4 shows an external view of the bag (B CK ). (1)
=63- is the battery cover in the battery compartment, and (2) is the external display, which does not indicate an operation stop state. (3) is a key cover to protect some of the operation keys, (4) is a grip part, (5)
) indicates part of the operation key.

FIG. 5 does not show a state in which the external display section is in an operating state and the key cover (3) is opened in FIG. 4. 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 down key to change the numerical values in each mode and to 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 = 64- key to clear all the photometric data taken in with the memory key.

Figure 6 shows the operating state on the external display, and the EXPO
8UR]lli, the P1 mode of the function is displayed. Each display section will be explained. (16) is a character display section using a 10-digit 5 x 7 dot liquid crystal display.
Displays the shutter speed value, aperture value, mode name, operating procedure messages, etc. (17) indicates the display position of the shutter speed value <T> and the aperture value <F>. (
18> displays the mode selected in the EXPO8URE function. (19) shows each function name, and each time you press the function key (6),
EXPO8URE → (MULTI・M) → (BRACK
ET)→IMPRINT→I NTERVAL-+B&
The transition goes from W→EXPO8URE→...

The MULTI-M function and the BRACKET function are skipped and cannot be selected when the EXPO8URE function is not executed.

Also, the EXTERNAL function is EXPO3UR.
Camera body (BD) when E function is in execution state
It can only be executed when control data from a meter (MET) is input, and cannot be selected using function keys. (2o) is a symbol indicating the selected function in the external display. (21) is a notation indicating that each function is in an execution state. (22
) is an index indicating the shutter speed value, (23)
is an index indicating the aperture value. Shutter speed value is 2
If the aperture value is less than a second, it will be displayed with a `` `` '' symbol, and if the aperture value is F32 or higher, it will be displayed with a ``!'' symbol. (24) is a graphic display section, and (25) is a photometric line, which is called an "IζV line" because it shows equal EV values.

(26) shows a P mode with a slope of 2/3 which is a high speed progera l\ in the progra no line. Depending on the lens, the limit is F], 4 on the wide open side, and F22 on the aperture side, and arbitrary aperture limits are set between [i''2 and F8 and Fll.A-1~. In the rafter display section, the lowercase number i indicates Jl/4 EV position, and the control point <1 which is the intersection of the program line and the EV line
760. F4+1/4EV> is displayed.

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

As you can see from this figure, when in P mode, the dots on the graphic display are displayed so that the F value side is at IEV pitch, and when in P3 mode, the exposure time side is at IE pitch, so that the dots are displayed in a straight line. . Table 1 shows the transitions between each function and each mode. The double-framed modes are power-on reset 1 when replacing batteries, etc.
Initialized at ~. The operating procedure for each mode in each function will be explained.

FIG. 9 shows the P2 mode of the EXPO8URE function. Use the FUNC key (6) to move the "1" mark to select the EXPO8URE function, then use the MODE key (7) to select the mode name displayed on the character display section (16).
2" Display and set to P2 mode. EX
I) In the mode display section (18) of the OS U RE function, the ``M'' mark is lit in the second part of ``P''''. In the graphic display (24), the camera shutter speed control limits are 174,000 seconds and 30 seconds.
The program line is limited by the second and lens control limits F1.4 and F22. In addition, the inclined portion of the program line passes through the F5.6 point at 1.7250 seconds in the initial setting state. Next, press the OPE key (8), the EXPO3URE7y function will be in the execution state,
As shown in Figure 10, the °゛l'' mark (21) lights up, and the EV line (25) corresponding to the photometric value appears.Next, the EN
Press the T key (9) to display the mode name ("PROGRA").
M2°') is switched to a control display (hereinafter referred to as 0UTPUT display). In this case, the shutter speed value is 1760 seconds, which is the intersection of the program line and the EV line, and F2
．． 8 is displayed on a part of the character (FIG. 11). 0U
In the TPUT display, press the UP key (1], ), D
0WN-q-(12) allows the slope of the program line to be shifted. FIG. 12 shows a state in which the UP key (11) has been moved to the right. Next, when the ADJ key (10) is pressed, the display switches to the setting display (hereinafter referred to as the INPUT display) and first asks for the FMAX value.

In FIG. 13, the FMAX value shows F22 due to initial setting. Set the FMAX value to F8 using the DOWN key (12).
When it is lowered to F8, the slope of the program line stops at F8, as shown in FIG. 14, and a restriction is added. FM
After setting the AX value, press the ENT key (9) to set the FM
Proceed to IN. In FIG. 15, the character display section is switched to FMIN value setting. For initial settings, Fl, 4
is displayed. With the UP key (11), FMIN
Change the value. FIG. 16 shows a state where F2.8 is set. Next, when you press the ENT key (9), the 'C0MPLETED' display indicating that the setting is complete will be displayed on a part of the character.When the completion display appears, switch to the 0UTPUT display using the ADJ key again, and the character display will appear. Camera control values are displayed (Figure 18).

Next, the S mode (shutter speed priority mode) of the EXPO3URE function will be explained.

Press the MODE key (7) and press “5” on the L recharacter display.
M0DE'” display and select S mode, the first
It will be displayed as shown in Figure 9. Here, press the OPE key 8)
It is in the running state.

(Also, the lens limits I='1.4 and 1♂22.) When you switch to 0UTPUT display with the ENT key (9), the shutter speed value display section of the character display section (16) will show an undercut. A line (cursor) is displayed (Figure 20). For the underline, press the UP key (1
1) or the DOWN key (12) indicates that the numerical value can be changed. 171 by UP key (11)
When the time is changed from 25 seconds to 11500 seconds, the result becomes as shown in Fig. 21. At the same time, the aperture value also changes to the appropriate exposure value.

Next, EXP OS 1. The A mode (aperture priority mode) of the J Tj E function will be explained. MOD
Press the E key (7) to display "A MODE" on the character display and select A mode, and the display will appear as shown in Figure 22.OPE key (8)
It is in the running state. Also, the camera is limited to 30 seconds ("l@" display section) and 1/4000 seconds. When the ENT key (9) is used to switch to the 0UTPUT display, an underline is displayed in the aperture value display section of the character display section (16), indicating that the numerical value can be changed (FIG. 23).

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

Next, the M mode (manual mode) of the EXPO8URE function will be explained. ``M MODE'' is displayed on the character display section (16) by pressing the MODE key (7).
When the display is displayed and M-mote is selected, a display as shown in FIG. 25 is displayed. It is in the execution state by pressing the OPE key (8). Also, the shutter speed and aperture are limited by the camera and lens. ENT key (9)
When the display is switched to 0UTPUT, the display becomes as shown in FIG. At this time, an underline is displayed on the shutter speed value display section, indicating that the value can be changed (FIG. 26). i from 17250 seconds by pressing the UP key (11)
/ 1. If the time is changed to OO0 seconds, the result will be as shown in Fig. 27. Next, press the cursor key <13) to underline (
cursor) to the aperture value display area (Fig. 28), DO
F5.6 to F2.8+ 2 by WN key (12)
If you change it to /4EV, it will look like Figure 29.

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.

Next, the long time mode of EXPO3UR and E functions will be explained. MODE-V-(7) displays "M MODE/L, T' on the character display section, and when the long time mode is selected, the display as shown in Fig. 30 is displayed. OPE key (8) If you switch to the 0UTPUT display using the E N T key (9), the display will appear as shown in Figure 31.The underline is attached to the aperture value display section, indicating that the aperture value can be changed. However, the cursor key (13) is disabled and the shutter speed value (long time) cannot be changed when 0UTPUT is displayed.Next, use the ADJ key (10) to change the INPUT value.
When the display is changed, the shutter speed value can be set as shown in FIG. 32. The shutter speed value (long time) can be set in a range of 10 seconds to 9990 seconds, and can be set in units of 10 seconds.

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

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

Next, the AVERGE mode in which the average calculation of the MULTI-M (multimetering) function is performed will be explained. This MULTI/M function is EXP
It can be set using the FUNC key (6) when the O8URE function is in the execution state. E X P OS U
When R and E functions are in execution state, FUNC
Use the key (6) to select MULT, I/M funk simulator 1, then use the MODE key (7) to display the mode name 'AVERGE' on the key A/rafter display (16), and select AVERGE mode. (Figure 36).

Here, the mode of the EXPOSURE function 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 import photometric values.

The -6 part of the graphic display indicates the controllable range.
Indices from (EV) to 6 (EV) are displayed on the LCD. In addition, on the left and right sides of the graphic display section, there are index displays ("--") indicating the width of deviation during highlight calculation and shadow calculation, and index displays (゛■■■■Pa) indicating out of linkage. The 1 point display (■゛) located one step higher than the index in the middle is the first photometric point, and is usually located in the middle (0 position). ! '：N'T
When 0UTPUT is displayed using the ' key (9), the character display section (
16) (Fig. 37). At this time “AVERG
Display “A” of “E” in the middle and press A VE RA G
Indicates E mode. Next, when the M key is operated, the value of the first photometric point located one step above the index is imported, and the 1-point display (■'') moves to one step below the index display. A second photometric point appears one step above the index display with respect to the first photometric point (Figure 38).At this time,
The value of the first metering point that has been imported becomes AE-locked, and the character display section (16) shows EX
Mode 1 selected by PO8tJRE function
The shutter speed value and aperture value calculated by =' (P2 mode is used this time) are displayed. Press the M key again (14
), the value of the second metering point is imported, the first and second metering points move to a balanced state with respect to the 0 position reference, and the character after display shows the first and second metering points.
The average value of the photometry point 1 is calculated, and the shutter speed value in P2 mode and the calibration value are displayed as calculation 1- (FIG. 39). At this time as well, the third photometric points 1 to 3 appear one step above the index display. Below, M key (
By sequentially operating 14), you can import and display the photometric values up to 8 points, but from the 9th point onwards, it will be replaced with the 1st point, and the latest one will be displayed. 8 Bo, it is possible to import and calculate photometric points in India. 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, MODE￥--(
When you operate 7), the character display M (16) changes to 0U.
The TPUT display changes to the mode name display, and “CI?”
CE N T E R 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 value is set to one level higher than the index display based on the zero position. The MAX and MIN values of the photometry points that have been entered will move to the balanced position (Figure 42).Next, press the ENT key (9).
), 0UTPUT is displayed, and the character display section (16) displays the calculated shutter speed value and aperture value, and "c" for CENTER mode between them (FIG. 43). Press the MODE key (7) again to set it to HIGHL.
Changes to I GHT mode, and '' appears on the character display area.
HI GHL I GHT" mode name display will be shown. At the same time, the point display showing the MAX value of the captured photometric point will move to the +2.3 Ev position, and the point display showing the MAX value will be displayed. The entire photometric point display captured as a reference moves (FIG. 44).

At this time, the number of photometric points protruding from minus 6 Ev is displayed at the minus 6 Ev position. Then E
0UTPUT is displayed by pressing the NT key (9), and the shutter speed value and aperture value calculated based on the highlight standard and H°' of the HIGHLIGHT mode are displayed on the character display section (Fig. 45). MO again and again
By pressing the DE key (7), the mode changes to 5HADOW mode, and the mode name "'5HADOW" is displayed on the character representation.

The point display showing the MIN value of the photometric point that was captured at the same time moves to the -2.7Ev position, and does not show the MIN value, but points I. The photometry point I that was captured based on the display. The entire display. moves (Figure 46)
. At this time, the photometric points I. which protrude beyond +6Ev are displayed at the position of +6F,v by that number. Then E
The NT key (9) will display 0UTPUT, and the shutter speed and aperture values calculated based on the shadow standard will be displayed.
o is displayed on the character display section (47th country). If you operate the MODE key (7) again and again, the AV
E T'? , return to A GE mode and repeat in sequence. The MULTI-M function has one more mode in addition to the 31-year-old mode mentioned above. EX r'
When the OS U RE function is in M (manual) mode, the MULTI-M function is in M A
Nt, IA becomes I-mode and other modes are not available (MOI) I-V-(7) becomes invalid. M A N
In U A L mode, the control value is only EXPO.
This is the setting value in M mode of 8URE function,
The 0 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 between them (Fig. 50). ). Since the OPE key enters the execution state, the M key imports the photometric points in the same way as in the other modes. In Fig. 51, one point, in Fig. 52, two points, in Fig. 53, eight points. In these cases, the character display section (16) remains at the set value and does not change.As shown in Fig. 53, a graphic display that allows you to judge the photometric distribution of a certain subject at a glance Here, by pressing the UP key (11) or the DOWN key (12), it is possible to move the entire photometric distribution map made up of the captured photometric points to the left or right.

In FIG. 54, since 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 brightness distribution of the subject.
3Ev.

2.7 The width of highlight and shadow exposure, which is fixed at Ev, can also be changed arbitrarily. If the underline is moved to the aperture value using the cursor key L, the aperture value will be changed. In the above description, the index display can be adjusted by arbitrarily changing the shutter speed value or aperture value using the UP key (11) or the DOWN key (12) to select the most appropriate point on the photometric distribution map. By moving it to the O position, you can set the appropriate value for the subject at your own discretion. In other words, this MULTI・
In commonly known terms, the MANUAT mode of the M function can be said to be a type of metered manual.

Next, the B RACK E T (bracket l-) function will be explained. This funcsidine takes pictures by shifting the exposure value based on the captured photometric data. It is possible to shoot with a shift up to the maximum reframe, and the start value of shift, shift width, and number of frames to be shot can be set. This function is also skipped and cannot be selected if the EXPO8URE 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 by the E function, and an index indicating the starting value and shift amount of the smoothing is displayed at the top of the graphic display section (24). This index is common to that indicating the photometric range of the MULTI/M function, but it is also possible to provide a different index. An index indicating the shift range is displayed on the graphic display section. Further, the BRACKET function is in a non-execution 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 number of remaining frames. Also, OPE
It is in the execution state by pressing the key (8), and therefore, a new display indicating the operating state of B RACK ET' funk stain 1 is displayed below the above-mentioned indicator in the same shift range on the graphic display section (24). appear. Next, AI) J key (
10) OUT 1) UT display INPtJ
When the display is changed to T, a message "ri' It OM" appears on the character display section (16), as shown in FIG. 57, to set the start value of the shift. Here, enter the underlined value
When the desired value is changed using the P key (11) or the DOWN key (12), the index and the operation display move as shown in FIG. 58 together with the key input. Next, press the ENT key (9) to send the message "5" to set Surashi 11.
"TEP" appears on the character display (16) (Fig. 59). The shift rlJ is 1/4Ev.

You can choose from four types: 1/2Ev, IEv, and 2Ev.
Use the UP key (11) or the DOWN key (12) to change and set the underlined value (Figure 60). Next, press the EN'r key (12) to
As shown in Figure 1, a message "FRAME'" appears on the character display section to set the number of frames to be photographed.

By pressing the UP key (11) or the DOWN key (12),
Change and set the underlined numbers (
9 frames this time) and in the graphic display section,
The width of the indicator and the operation display continuously display a shift range from the smooth start value to the smooth final value (FIG. 62). Next, by pressing the ENT key (12), the message 'C0MPLETED' is displayed on the character display section (16), indicating that the setting is complete.

At this point, if you operate the ENT key (12), the
ROM" and repeatedly display each setting. ADJ key (10
), the INPUT display changes to the 0UTPUT display, and the character display section (16) displays the amount of deviation from the reference value and the number of remaining frames (Figure 64).Next, release the camera. Then, the photometric value at that time becomes locked, and the exposure value of each frame, which is shifted based on that photometric value, is set to the mode selected by the EXPO3URE function, this time P mode (P,.

P2. The camera is controlled by converting the shutter speed value and aperture value calculated in any mode of P3). Figure 65 shows the camera released once.
The character display section (16) displays the amount of deviation of the exposure value controlled by the next release from the reference value and the number of remaining frames. Then, the graphic display section (24)
changes in the operational display to display a range from the next control (exposure) value to the final (exposure) 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 to indicate that there is one frame remaining, and only the final value is displayed on the graphic display section (24).

Next, when you release the camera to take the last frame you have set, the character display area (16) and graphic display area (24) are reset to the initially set values, and the new metering meter is displayed again as shown in Figure 68. The state changes to a state where values can be taken in, the display state becomes the same as that shown in FIG. 64, and the camera can be controlled repeatedly. When the BRACKET function is in execution state, the display on the external display section (2) is set to EXPO8URE.
When changing to the function and executing the BRACKET function, if the EXPO3URE 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 value lines move in parallel, so B R
It can be easily confirmed that the ACKET function is being executed.

Next, the imprint function will be explained.

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

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

, no graphic display is performed in the second case.

Press the MODE key (7) to enter the month/day mode, and the mode name is displayed on the character display section (16) (Fig. 71). Next, when the rgNT key (9) is pressed, data from the calendar microcomputer (CAMC) is displayed (Fig. 72). If the image is photographed without being pulled out, the data of this character display section (16) will be imprinted. Furthermore, if the ADJ key (10) is not pressed in the state shown in FIG. 72, data can be changed, and a cursor is displayed on the year data display section (FIG. 73).

Then, when you press the cursor key (13) twice, the cursor is displayed below the day data display area, and the UP key (13) in Figure 75 is displayed.
Press 1) three times to see the message ``The data in 1 has been changed from the 12th to the 15th.'' In this state, press the ADJ key (10) and the display shown in Figure 75 will appear, and this data will be imprinted. Imprinting is performed even in the display state shown in Figs. key (7)
Each time the key (7) is pressed, the imprint mode is changed in the order shown in Table 1, up to the hours, minutes, and seconds mode, and when the MODE key (7) is further pressed, the mode becomes the up-count mode. FIG. 76 shows the mode name display state of this up count mode. If the ENT key (9) is pressed in this state, the display state shown in FIG. 77 will be obtained. and ADJ key (10
), a cursor will appear and the data corresponding to the cursor position will be displayed using the up key (11) and down key (12).
) can be changed. Up key (11)
Then O→l→・・・・・・→9→−→Blank→O・・
. . . and the down key (12) changes in the reverse order. The state where the data change is completed in this way is the seventh
This is Figure 9. If you press the ENT key (9) in this state, the 8th
The cursor will move as shown in Figure 0. When photographing is performed in this state, the data incremented by "1" is sequentially imprinted. Note that there is no carry to - or blank digits. When the MODE key (7) is pressed in the up-count mode, the mode changes to the down-count mode, with the mode name displayed as shown in FIG. 81. The initial data is set in the same procedure as in the up-count mode, and the display at the end of the setting is shown in Fig. 82. In both of these modes, data that is sequentially changed and imprinted during photographing is displayed on the character display section (16).

When the MODE key (7) is pressed in the down count mode, the fixed data imprint mode is entered, resulting in the display state shown in FIG. 83. If you press the ENT key (9) below, the ADJ
When the key (10) is pressed, the display state shown in Fig. 85 is displayed, and the cursor key (13), up key (11), down key (
12), change the data as shown in Figures 86 and 87, and if you do not press the ENT key (9),
1-! ? It becomes state I.

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

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

Next, the INTER, VAL (interval) functions 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 frames during each interval shooting (hereinafter referred to as the number of frames), and the number of repetitions of the interval (
(hereinafter referred to as the number of groups), the first release start time of interval shooting (hereinafter referred to as the start time)
can be set.

FIG. 89 shows the mode name display of the interval function. It is in a non-execution state, and the ENT key (9) is disabled. Further, the graphic display section (24) is in a non-display state in this function. When this interval function is put into an execution state by pressing the OPE key <8), execution starts toward the start time. Also, if you want to immediately execute the first Lurise of the interval, press the OPE key (8) to activate it, then release the camera to cancel the start time and start. . Next, press the ADJ key (10
), the 0UTPUT display changes to the INPUT display, and as shown in FIG. 90, a display state in which the interval time can be set is first entered. The character display section (16) displays "I" for INTERVAL time, and "H (Hour), M (Minute)" indicating the setting units for hours, minutes, and seconds.
te).

The characters "S" 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 frames (F°°) and the number of groups ("'G"). Press the UP key (11) or DOWN key (] for the underlined value.
2), move the changed part using the cursor keys (13), and set the number of frames and the number of groups (Fig. 93). The number of frames can be set up to a maximum of 9 frames, but if the BRACKET function is in the execution state, priority is given to the number of frames in the BRACKET function. Maximum number of groups is 9
Up to 9 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 5 TART time.
“S 11 will be displayed, indicating the date, hour, and minute setting units.”
D (Date), H (Hour), M (
The characters “M 1nute)” are displayed together with the numerical value.

Change the numerical value in the underlined area using the UP key (11) or DOWN key (12), move the changed area using the cursor keys, and set the start time. Then EN
By pressing the T key (9), the character display section (16) changes to display ``'COMPLETED'' indicating that the setting has been completed (figure omitted), and then by pressing the ADJ key (10), the INPUT display is changed to the mode name display again. (Figure 95).If you want to start the interval function, press the OPE key (8) to enter the execution state, and press the EN key.
When the T key (9) is used to display 0UTPUT, the 96th
As shown in the figure, the start time is displayed on the character display section (16). After the interval Lullies is executed, the character display section (16) shows the following:
The remaining time until the next release is hours, minutes, seconds (“H, M, S
”) (Figure 97).

FIG. 98 is a block diagram showing a specific example of the buck circuit (BCKC). (CMC) is a control microcomputer that manually controls functions, modes, data settings, exposure calculations, display data creation, imprint data creation, and imprint operations.

Furthermore, display sections (S D ), (D D ), which will be described later,
(CD) control, calendar microcomputer (CAMC)
It also exchanges data with the display microcomputer (DMC) and the camera body (BD). (CAM
C) is a calendar microcomputer, which also controls 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 Figure 5, switch (CL) is a switch that is closed by operating the memory clear key (15), and (CUR) is a cursor. A switch that is closed by operating the key (13), (ENT) is a switch that is closed by operating the enter key (9), (up) is a switch that is closed by operating the enter key (9), and (up) is a switch that is closed by operating the enter key (9).
The switch (DWN'') that is opened by operating the down key (11) is a switch that is opened by operating the down key (12).

These six switches are connected to each human-powered boat of the control microcomputer (CMC), and are also connected to the AND circuit (A
G) is connected to the interrupt terminal (INTB).

Therefore, even if the control microcomputer (CMC) has stopped operating, if any switch is turned ON, the control microcomputer (CMC) will start operating.
P E ) 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 (AD
J) is a switch that is closed in conjunction with the adjustment key (10), and (MOD) is a switch that is opened in conjunction with the operation of the mode key (7). These four switches are connected only to the input ports of the control microcomputer (CMC), so even if these switches are turned 'ON', the control microcomputer (CMC) is not activated.

Next, the operation of the control microcomputer (CMC) will be explained based on the flowchart of the control microcomputer (CMC) shown in FIG. First, from the camera body (BD) to the signal line (C
8B) falls to “Loud”, the interrupt terminal (INT
The operation starts from step A) of No and O.

First, since the camera has been started, set the signal line (BS,) to "High", then enable interrupt operation using the interrupt terminal (INTA), and then determine at what timing the camera body (BD) interrupts. Determine whether a signal is input. That is,
In step No. 2, it is determined whether or not it is in the state of waiting for data input. If it is in the state of waiting for data input, the data for imprinting (Tv) is determined.

Av) or calculation data is input in step No.3. This is because, as mentioned above, when the signal line (C8B) falls to "I Lo, I+", the signal line (BI
O) is “High”, 11 L for imprint data
It can be identified because it is oIll++. and,
When it is determined that imprint data is input, the sent data is read and it is determined in step No. 5 whether or not the photographic function has been selected. No, if it is determined in step 5 that the photographic function is not selected, the step 5 is not performed and the
o. Move to step 15. On the other hand, if the photographic function is selected, the process moves to step 6 and the data corresponding to the selected 5-inclusive mode is transferred to the photographic L.
It is sent to the drive circuit III (LDR) of the ED. This operation is
A synchronizing signal is sent to the signal line (C8LD), and data is sent sequentially in 4-bit units. Then, set the signal line (LDEN) to °'Low°° and drive circuit (L
When the display operation of DR) is activated, the light emitting diodes (LEDs) of the segments are dynamically driven in accordance with the imaging data, and imaging is performed. Then, the control microcomputer (
CMC) counts the time according to the film sensitivity read from the camera body. Note that when using the B&W function, even if the read film sensitivity is the same data as the subject function, a different (long) time count is performed.

When the count ends, the signal line (LDEN)
is set to "High" to stop the imaging operation by the drive circuit (LDR). In addition, when the rear curtain starts running on the camera body (BD), 'Lo' is displayed on the signal line (C8B).
ud" pulse is output. Then, at this time as well, an interrupt signal is input to the interrupt terminal (INTA), and since it is not waiting for data input at this time, the process moves to step No. 11. Then, No. If it is determined in step 11 that the 5-input operation is in progress, No, the process moves to step 10.
The signal line (LDEN) is set to "High" to forcibly stop the 5-input operation. This prohibits the 5-loading operation from being performed even during film winding. N
o.

In step 15, press the switch (SCN) on the camera body.
It is determined whether the switch (SCN
) is "ON", No, steps 16 to 21 are not performed, and No, the process moves to step 40. On the other hand, if the switch (SCN) is ``OFF'', then it is determined whether or not it is in count-up mode.If it is in count-up mode, ``1'' is added to the register CR in which the imprint data is set. No, proceed to step 40.

On the other hand, if the mode is not the count-up mode, it is then determined whether the mode is the count-down mode. Then, in the countdown mode, subtract 1'' from the contents of register CR and N
o. Move to step 40.

On the other hand, if it is not the countdown mode, then it is determined whether it is a bracket function or not, and if it is a bracket function, subtract II II II from the register BR where the frame number of the bracket function is set, and if it is No, go to step 40. As usual, move to step No. 40.

Note that data transmission is performed even when the switch (SCN) is "ON";
N) is set between steps N014 and No, 5, and if the switch (SCN) is "ON", it is immediately determined
, 40.

No, in step 3, it is not forwarding data (signal line (
When it is determined that B I'O) is "High"), the process moves to step 25 (No), and data is read from the camera body. Then, if the exposure function is selected, No, the process moves to step 27,
Wait until the signal line (BIO) becomes “Low”.

Then, when the signal line (BIO) becomes "'Low'", the back ICP ('"80H") is output. The camera body (BD) sets the signal line (BIO) to High when this back ICP is input, and the signal line (CS
B) remains 'Loud' and the control microcomputer (CM
Wait for the operation to be performed in C), and when enough time has elapsed for the operation to be performed, switch the signal line (BIO) to “”.
In the control microcomputer (CMC), N
o. In step 28, the back ICP is output and the exposure calculation subroutine is performed. When the arithmetic operation is completed, the signal line (BIO) is waited for to become "Low", and when it becomes "Low", the aforementioned control data (Tv, Av
), exposure control mode, out of interlock, release enable/disable, etc. are sent, and the process moves to step 40.

When the control microcomputer (CMC) is activated by a pulse output to the signal line (C8B) when the camera body (BD) starts operating, or when a pulse is input when the trailing curtain starts running. In this case, if it is not a forward function or if the imprinting operation has been completed, the process immediately moves to step 40 (No). Switches (M), (CL).

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

No, in step 40, reset the timer register (for counting operating time) TTfl, set the flag IOF, which determines whether to input or output data from the calendar microcomputer (CAMC), to 1'') LNo, in step 42 No. At step 42, the flag TOF
Determine whether or not is "°0", and if it is 1', read data from the calendar microcomputer (CAMC), reset the flag IOF to "0°", and move 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 calendar microcomputer 00-(CA) and the flag IOF is set to 1.
Set it to .degree. and move to step 47. The data transfer method is to set the signal line (C8CA) to “Low”
When outputting data, the signal line (Ilo) is set to 'High', and when inputting data, the signal line (Ilo) is set to 'High'.The signal line (C8CA) is set to 'Low'. When this occurs, an interrupt is generated to the calendar microcomputer (CAMC), and the calendar microcomputer (CAMC) is interrupted.
CAMC) outputs a pulse for data exchange synchronization. In synchronization with this pulse, 4-bit data is sequentially exchanged via the data bus (DBUSI). The data sent from the calendar microcomputer (CAMC) to the control microcomputer (CMC) is 2:02:02 on February 1, 2018, and 9:01 until the start of the next shooting operation for interval shooting.
seconds, and data indicating whether interval shooting is in progress and whether interval shooting has ended. Therefore, the control microcomputer (CMC) creates imprint data based on these data, and also creates data for displaying the remaining time until the start of the next shooting operation 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 date, hour, and minute of interval shooting, the time indicating the interval of interval shooting,
Minutes, seconds, number of groups for interval shooting, number of frames for interval shooting, set exposure time in M/LT mode,
There is data such as whether the interval function is selected or not, and whether the M/LT mode is selected.

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

49 steps to l-LoI the signal line (IISz)
Activate the camera body as III+ and move to step 50. This No. 48 subroutine is the first
03 and 104, and the detailed operations will be omitted since the relationships between the operations of each key, setting data, and display have already been described.

No. 48 step subroutine and no.

When the operation of step 49 is completed, the interrupt terminal (INTA
) and sends display data to the display microcomputer (DMC'). This operation first
Set the signal line (DEN) to 'Lou+' and set the display unit (S
D ), (D D ), and (CD ) are in the operating state,
Next, set the signal line (C3DM) to “L our”,
It notifies the display microcomputer (DMC) that data will be output, outputs a synchronization pulse from the signal line (DCK2), and sends data 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, power is supplied to the display sections (SD), (CD), and (DD) when the signal line (DEN> becomes 'Low''). It has become so.

When the data transfer is completed, one of the switches (M) to (MOD) turns “ON” in step 52.
If it is “ON”, reset the register TIR, and set all switches to “O”.
If it is not N°, add 1 to the contents of the register TIR, and move to step 55 (No). and N
o, in step 55, it is determined whether the contents of the register TIR have reached a certain value "K", and if it has not reached "K", the process moves to step 42, and the same operation is repeated. And no.

When it is determined in step 55 that the contents of the register TTR have reached °K', it means that a certain period of time has elapsed with no key operations or data exchange with the camera body (BD). At this time, the signal line (DE
N) to 'Higb' to stop the operation of the display section, and enable operation by an interrupt signal to the interrupt terminal (INTB) to stop the operation.6 Figure 100 is No. 29 in Figure 99.
3 is a flowchart showing a specific example of a calculation subroutine. First, it is determined whether the bracket function is selected, and if it is not selected, the A flag is reset. If it is selected, it is determined whether or not the bracket function is being operated. Set flag. After resetting or setting the A flag, the Ev value is calculated using data from the camera body (BD).

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

Once the current Ev value is determined, the meter (MET
) is imported, and if so, it is set as an external function and the meter (ME
The data from T ) is used as the control value. Note that when the control limit is 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 (MET), then it is determined whether the mode is M or M/LT mode, and if it is in this mode, the manually set T v and A v are output. On the other hand, if it is not the M, M/LT mode, it is determined whether the multi-function is selected next, and if the multi-function is selected, the control Ev is determined based on the stored Ev value.
Calculate the value.

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
vmin)/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 I mode, the calculation of Evmax=2, 3 is performed on the maximum value of Ev stored, and the control E
Calculate v. If it is not highlight mode, then it is determined whether it is shadow mode or not, and if it is shadow mode, Evmin-1 is set to the minimum value Evmin of stored Ev.
-2 and 7 are 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 calculate the control Ev.

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

Then, based on the obtained control Ev, P, , P2. P
3. Calculation is performed depending on which mode is selected from A and S modes. A specific example of this calculation subroutine is shown in FIG. This calculation is first performed as follows: Evmax (=Tvmax+Avmax)<Ev.

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

When the control T v and A v are determined, the flag A is set to °“.
If it is set to "1", it means that the bracket function is selected and no calculation is being performed, and the operation shifts to the calculation operation for brackets.Also, if the bracket function is in operation. also moves to bracketing calculation for the next shooting.First, it is determined whether the M, M/LT mode is selected, and then the M, M/LT mode is selected.
When in mode, the aperture value is moved by the number of frames corresponding to the amount of shift (the number of times of next shooting), and the flag is reset to 1.

On the other hand, P, , P2. In the P, , A, and S modes, Ev is moved by the number of frames corresponding to the amount of shift, the A flag is reset, and the process moves to the calculation subroutine for Tv and Av. When T v and A v are calculated in this way, the bracket function 41 is selected, shooting for the set number of frames is completed, and the signal line (BS2) is
is “Low”. And “Low”
If the conditions are met, a release disable signal is set to prevent the photographing operation, 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, in the camera body (BD), the signal line (IP)
+”, the interrupt operation by the interrupt terminal (INTA) starts. Then, in step STI, the timer interrupt (
(Interrupts that occur every lsec) are enabled, and the process moves to Sr2. In step ST2, the switch (SCN) is “ON”
If it is “ON”, the interval and M/LT operations are not performed and step 5T is performed.
Move to 20. On the other hand, the switch (SCN) is OFF.
``If so, 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.

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

When it is determined 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
, by subtracting ゛1p, the contents of register IFH become “0°
If the number is not reached (°), the process moves to step 5T20.

On the other hand, if the contents of register IFR, are "0", then "tlo
Subtract o and determine whether it has become "0゛'. Then, if it has become "0", set the interval end signal to Sera?-L, and if it has not become "'O", set the remaining time. Then, it is determined whether the M/LT mode is set, and if it is not the M/LT mode, the signal line (BS2) is set to "I-1i Hh", and if the M/LT mode is set, the signal line (BS2) is set to "I-1i Hh". Step 5T with “Low”
Move to 20.

Then, interrupts to the interrupt terminals (INTA) and (INTB) are enabled, and it is determined whether the flag TIF is "1". If the flag TIF is "'1°", it means that a timer interrupt has occurred during this operation, TIF is reset to "o", and the operation proceeds from step 5T45. on the other hand,
If the flag TIF is "O'", the operation is stopped.

When the control microcomputer (CMC) sets the signal line (C8CA) low for data exchange, the calendar microcomputer (CAMC) outputs the interrupt terminal (INT) from the 5T25.
Perform the operation according to B). 5T25 enables a timer interrupt, and then determines whether to output or input data by determining the state of the signal line (Ilo). For data input, the control microcomputer (C
Read data from MC). Then, if M/LT mode is selected and M/LT mode is not in operation, set the exposure time data, and if M/LT mode is not selected or counting is in progress in M/LT mode, leave it at 5.
The process moves to step T30. In step 5T30, it is determined whether the interval function has been selected and is in an operating state. If the interval function is not selected or is in operation, leave it as is, 5T2
Move to step 0. On the other hand, if the interval function is selected and the operation has not started, set the number of frames in the register IFR, the number of groups in IGH, the time interval between groups (remaining time), and the start time.
Then move to step 5T20. When it is determined in step 5T26 that data is to be output, the aforementioned data is sent to the control microcomputer (CMC) and the process moves to step 5T20.

When a timer interrupt occurs every second, the operation starts from step 5T40, and if the interrupt terminal (INTA) or (INTB) is in operation, the flag TIF is set to "1°°" and the flow of the operation up to that point is continued. On the other hand, if such an operation is not performed or those (INTA), (IN
When the operation in step TB) is completed, the operation starts from step 5T45. 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 (Tv timer), and it is determined whether the Tv timer has reached "0". If it is not 0'', proceed directly to step 5T62 (INTA).

(INTB), enables timer interrupts and stops operation. On the other hand, if the content of the Tv timer is "0" in step 5T48, the signal line (BS2) is
High”, the camera body (BD) starts running the trailing curtain, and moves to step 5T62.

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

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

When it is determined in step 5T55 that the interval function is selected, the process moves to step 5T56, where it is determined whether it is 1 minute before the start of one group shooting, and if it is 1 minute before, the signal line CBS, ) is selected. °“Low
” pulse is output to start the camera body (BD) and start the boost operation of the flash device (FL).In this case, since the signal line (BS2) is outputted as ``High'', there is no need to wait until the start. Calculate the time of 5T6
Move on to step 2. On the other hand, if it is determined in step ST56 that it is not one minute before, it is then determined whether it is the start time of one group's shooting,
If the start time has been reached, the signal line (BS2) is
Move to step 5T62 as ILoIll-1. On the other hand, before or after the start, it is determined whether 'Low' is output to the signal line (Bs2), and if I't, oIll++ is output, one group's shooting operation is started. Since it is inside, immediately 5T62
Move to the next step. On the other hand, if "'High'" is output to the signal line (BS2), it is before the shooting operation of interval shooting starts or between groups, and in this case, the remaining time until the start is calculated. 5
The process moves to step T62.

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) from Table 2. The data (4 bits) shown in is connected to the data bus (D BUS
2”) to the display microcontroller (DMC),
The data is converted into graphic display data by a display microcomputer (DMC) and serially transferred to an LCD segment driver (SD). LCD segment driver (SD
) has a built-in RAM for LCD display, and 1-bit data of this RAM for LCD display is displayed on the liquid crystal display (LCD).
It corresponds to lighting and non-lighting of 1 dot I. After the graphic display data is transferred to the LCD segment driver (SD), it is stored in the LCD display RAM, and the LCD
An LCD segment drive signal (SGT) corresponding to the contents of the display RAM is applied from the LCD segment driver 11.5- (SD) to the liquid crystal display (LCD). The LCD common driver (CD) uses a built-in oscillator to generate timing signals necessary for display, and also drives the liquid crystal display (LCD).
The LCD common scanning signal (CMT) that automatically scans the common signal in accordance with the display duty is transmitted to the liquid crystal display section (
LCD).

The LCD segment drive signal (SGT) and the LCD common scanning signal (CMT) are generated by the LCD common driver (CD).
Synchronization is achieved by a synchronization signal (H8) supplied from the LCD segment driver (SD) to the LCD segment driver (SD). The liquid crystal display (LCD) uses these two signals, namely the LCD segment drive signal (SGT) and the LCD common scanning signal (C
The reference power source (DD) for driving the LCD, which performs dot matrix graphic display using the MT), is a stable power source (VDP) for driving the liquid crystal display (LCD).
) is supplied to the LCD segment driver (SD) and LCD common driver (CD).

The above is an outline of the operation until a graphic pattern is displayed on the liquid crystal display (LCD) based on data from the control microcomputer (CMC), but below is a flowchart of the display microcomputer (DMC). This will be explained in more detail.

First, from the control microcomputer (CMC) to the display microcomputer (D
By the signal line (D E N ) to M C),
The display microcomputer (DMC) starts operating, power supply starts, and the reset routine shown in FIG. 106 starts (step 1). LC at step ■
Initialize the D segment driver (SD) and turn off the liquid crystal display (LCD) (all lights off).

At step (2), it is determined whether or not the full lighting mode is set, and normally the system enters an interrupt standby state at step (2). This determination of whether or not it is the full lighting mode is for a disconnection test at the factory.When the full lighting mode is selected, all lighting data is output to the LCD segment driver (sp). 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 of step (2) and waits for an interrupt from the control microcomputer (CMC). 1st
The imprint routine shown in FIG. 07 is a routine for setting a flag for displaying surface water during imprinting ("IMP") for a certain period of time during imprinting. The step starts with the imprint signal (I P) from the camera (■)
, save the register at step ■, 'IM' at step [phase]
After setting the P"' display flag, the registers are restored in step (2) and the original main routine is returned to in step 0.

The main routine in Fig. 108 is executed by a control microcomputer (CM C
) to the display microcontroller (DMC) (C3DM
), the restart of the main routine is prohibited until all processing in the display microcomputer (DMC) is completed, and step Input the transfer data from C), check the power supply voltage in step [phase], and if the power supply voltage is below a predetermined value, set the power supply voltage check flag (B, C, flag) in step O.

In steps [phase] to step O, the control microcomputer (CMC)
) is decoded into graphic display data.

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

Next, the index <22) indicating the shutter speed value, the index (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, test the B, C, and flags determined in step [phase],
If the B and C flags are set, the battery check display (B, C,
display).

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 an index (20) indicating the function itself is performed. In step 0, these graphic display data are decoded, and the calculations corresponding to the LCD segment 1 to the driver (SD) will be described in detail.

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

M, M/LT), set the setting line (26) to the 109th
Draw according to the steps from Figure to Figure 114. P+, P2
, PS When the S mode is selected, in Fig. 109, the minimum aperture value Avmax of the lens, the maximum aperture value Avmin of the lens, the setting limit value Avn on the small aperture side of the lens, and the setting limit value on the wide aperture side of the lens. Avm and the selected slope Avp, the procedure shown in FIG.
Draw Avy without 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 as T vx = T vmax (step ■). The calculation of the setting line in P l, P 2, PS mode, Figure 6-(26) is above,
Avp line in P and P3 modes, Figure 109-
The slope of the line segment ■ is 2:1 and 1:2, so if it is drawn in the same way as in the P2 mode, the slope becomes step-like and difficult to understand.

Therefore, in the Pl 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). Figure 111 is S
It shows how to draw a setting line in the mode, and Tvn is the setting shutter speed. Tv with steps ■～■
Draw a line (line segment) with Avy = Avmin while incrementing x, then draw a line (line segment ■) with T vx = T vn, draw a line segment ■ with Tvx = Tvn (step ■), and finally While incrementing Tvx again l-L, Avy-A vmax line (line segment ■)
draw FIG. 112 shows how to draw a setting line in A mode, and Avn is the setting aperture value. Step ■
Set Tvx--0,5 at ~■, draw a line segment ■, increment Tvx at step ■, and calculate A vy =
A vn line (line segment ■), T vx with step ■
= T vmax, and draw a line segment ■. Fig. 113 shows how to draw a setting line in M mode. In steps ■ to ■, while incrementing Tvx, draw the line (line segment ■) of Avy = Avn. = A vmi
Draw a line (line segment ■) from n to A VV = A vmax. Here, A vn and T vn are a set aperture value and a set shutter speed value, respectively.

Figure 114 shows how to draw a setting line in M/LT mode. In steps ① to ②, set Tvx--0, 5, and Avy =
Draw a line (line segment ■) from Av+nin to A vy = A vmax, and draw a line (line segment ■) from Avy=Avn while incrementing Tvx at each step.

Furthermore, the setting line for M/LT mode can be drawn using exactly the same procedure as for M mode. The above is the calculation method of the graphic display unit in the exposure function.

Next, the calculations of the graphic display unit when the multi-function is selected on the external display will be described. At this time, the index from -6 to +6 (hereinafter abbreviated as △Evx) indicating the range from control has already been decoded so that the liquid crystal display (LCD) lights up in step [phase] in Fig. 108. 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 Eve, the Ev currently being measured is Evo,
When the number of stored data is n, the point P is currently being photometered in step ① in Fig. 115. Plot (△Evo, yo) and then plot line L0 (step ■)
. Point Pn (△Evn, ym) stored in step ■
Plot. However, 1≦n≦8, 2≦river≦9. This situation is shown in a flowchart in FIG. 115. The above is the calculation method of the graphic display section in multifunction.

Next, the operation of the graphic display section when the bracket function is selected on the external display will be explained. Indicator indicating the amount of deviation from proper exposure -6 to -1
-6, like the multifunction, is decoded so that the liquid crystal display (LCD) lights up in step [phase] of FIG.

In Table 4, the current point is △EvCONT, and the setting start point is △
If EvSET, then in step ■ in Figure 116, △E
Find vn+ax, and in step △Evx=ΔEvSE
Line from T to △I':vx-△E vmax (L
SET), ΔEvx - ΔEvCON in step ■
The line from T to ΔEvx - ΔE vmax (LCO
NT). 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 advances to step (c) in Figure 108, where the symbol (20) indicating which function is selected on the external display is decoded, and the symbol (20) on the stabilizer O is decoded. LC at step 0 along with the decoding result and the operation result at step O.
Output to the D segment driver (SD). In steps 0-0, the "'IMP" flag indicating that imprinting is in progress is tested, and if it is set, the "IMP" flag is displayed on the subcharacter.
MP'” is decoded and the LCD segment driver (S
Output to D).

In this way, when all the graphic display data is decoded and serially transferred to the LCD segment driver (SD), the liquid crystal display (LCD) is turned on (step @), and the display microcomputer (DMC) processes the data. 1 loop ends. After that, it enters a standby state for an interrupt signal (C8DM) from the control microcomputer (CM C), and when the interrupt signal (C8DM) is sent again, the display microcomputer (D
MC') starts the main routine again and enters the process for the next graphic display from the above-mentioned step (2).

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

In addition, in the back circuit (r3cKc) of FIG. 98,
Two 3-volt power batteries (B) for the calendar microcontroller
Power is supplied from the control and display microcontroller (CMC)
, (DMC) are powered by four 6 volt power batteries (A). and display microcontroller (DMC)
The battery check (step [phase] in Fig. 108 checks both of the power batteries (A>, (B)).If the power battery in (A) is not working, the
As shown in the figure, the graphic display section (24) has a symbol (
A) and four batteries are displayed, and when the power source battery (B) is not working, the symbol (B) and two batteries are displayed as shown in FIG. 118.

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 119 (a) and (b).
, (c) are possible. That is, in this embodiment, the minimum display step of the liquid crystal display (LCD) is 0.5 Ev steps in both the shutter speed direction and the aperture direction, so a point is always displayed every 0.5 Ev step of the 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 rounding of the shutter speed value and aperture value during display.

If displayed in this way, it is extremely difficult to understand the slope of shutter speed value: aperture value of 1:2 in P1 mode. Therefore, in this embodiment, as shown in FIG. 119(c), 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 aperture value relative 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) and the shutter speed value are Tv≦11. Aperture value is Av≧0.5
However, when Tv≦-0,5 and Av≧9.5, both are represented by the index [11-“;”, so it is not accurate. Therefore, the Ev line is not displayed when Tv≦-〇, 5 and Av≧9.5, but when 11≧Tv≧O, 0,5
Only the range of ≦Av<9.5 is displayed. However, the setting line (26) is displayed in the range of Tv≦11 and 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≧O9 and the aperture value 0.
Only the accurate range of 5≦Av≦9.5 is displayed. A specific method of drawing the Ev line is shown in FIG. 120. In this figure, first, in step ■, initial setting is made to Tvx=O (15ec), and in step ■, A vy= Ev−T vx
seek. 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). 0 at step ■
．． Determine whether 5≦Avy<9.5 (1,,2≦F<27) and if it is within this range, point) (Tvx).

A vy) is set to the blower 1 - step (■), and if it is outside the range, it is not plotted. In step ■, Tvx is incremented by IEv step, and in step ■, T vx>T
Determine vmax (T v = 11), and if No, return to step (2) and repeat steps (2) to (2). If YES, that is, T v>T vmax, the process proceeds to step (2) and ends. Note that the step of incrementing Tvx may be set to 0.5 Ev steps.

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

All remaining circuits (flash device (FL), receiver (RE)
C'), display section (DSP), lens circuit (LEC)
, AF circuit (AFC), back circuit (BCKC),
A-D.

It exchanges data with the DA converter circuit (ADA). Therefore, if you monitor this serial input/output terminal while operating this system, check the monitored and read data, and compare it with the operation of the camera system.
You can check whether the system is working properly. Therefore, this series input/output terminal (SOU), (S
The terminal (TI>) for the back circuit (BCKC) is where IN) and (SCK) come out from the camera body (BD).
, (T2), (T,), terminals (T, l), (T, 2) for the lens circuit (LEC).

There is (TI3). All the terminals are the back circuit (rlcKc) terminal (Tl).

(T2), (T3), so the back circuit ([1CKC)
What is necessary is to be able to attach a checker at the position of .

Then, from the checker side, the microcomputer (13Mc> outputs °'I-riHh to the signal line (C31, 1).
``Low'' signal with lower impedance than the ``'' signal.
If the signal line (csn) is forced to "Low" by outputting the "signal", the gate circuit (G2) will always be in the active state, so the back circuit FIFS (n CK
Data exchange with circuits other than C) will be checked.

Also, checking of the back circuit (BCKC) is possible to some extent with the lens circuit (LEC) terminals (TI2) and (TI!>).

(As described above, according to the present invention, film sensitivity data is input as serial data from the camera body to the serial data input terminal of the data imprinting device. Data reception can be performed without increasing the amount of data, and the configuration is simple.

Furthermore, according to the embodiment of the present invention, the direction data indicating the control exposure time and the control aperture value are also sent through this serial data input terminal, so the direction data terminal is no longer required, and the number of terminals is reduced. is further reduced.

Figure 1 is a block diagram showing the entire camera system to which this invention is applied, and Figures 2 and 3 are flow charts showing the operation of the microcomputer (BMC) in the camera body (BD). , Figures 4 and 5 are external views of the back (BCK), Figures 6 to 8
The figures are diagrams showing display examples of the display section (2), figures 9 to 35.
The figure shows the relationship between key operation and display in the exposure function, Figures 36 to 54 show the relationship between key operation and display in multifunction, and Figures 55 to 68
Figures 69 to 1.31-88 are diagrams showing the relationships between key operations, photographing operations, and displays in the bracket function, Figures 69 through 1.31-88 are diagrams showing the relationships between key operations and displays in imprint funk stain I, Figures 89 to 97 show the relationship between key operations, photographing operations, and displays in interval funk simulator 1, and Figure 98 shows the back circuit (BCKC).
), and FIGS. 99 to 104 are flowcharts 1 showing the operation of the control microcomputer (CMC).
~, Figure 105 is a flowchart showing the operation of the calendar microcomputer (CAMC), Figures 106 to 108 are flowcharts showing the operation of the display microcomputer (DMC), and Figures 109 and 110 are program lines in P mode. Figures 111 to 114 show how to display S,
A diagram showing how to display program lines in A, M, M/I, and T modes, Figure 115 is a diagram showing how to display in multi-function, and Figures 1-16 are diagrams showing how to display in bracket function. , FIG. 117, and FIG. 118 are diagrams showing display examples when the power supply battery is low, and FIG. 119 is P1.
In the figure showing an example of display in the mode, the 120th country does not show the method of displaying the Ev line, but is flowchart 1.

T3: Serial data input terminal, NO, 8, No, 9: Light emission control means, T4: Start signal input terminal, NO, 5 to NO,
10: Direction control means.

Applicant: Minolta Camera Co., Ltd.
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Claims (2)

[Claims] (1) Serial data indicating the sensitivity value of the film used, set on the camera body, is input to a data imprinting device that is electrically connected to the camera body through a terminal group that contacts the corresponding terminal group of the camera body. A serial data input terminal, a light emission control means for controlling the amount of light emitted by the data exposure light emitting section according to the film sensitivity value input to the serial data input terminal, and a signal related to the start of the shutter release operation of the camera body. A start signal input terminal to be inputted, and a projection control means for starting a light emission operation of the light emitting section in response to the signal input to the start signal input terminal, and causing the light emission control means to control the amount of light emission. data imprinting device. (2) The serial data input from the camera body to the serial data input terminal includes the exposure time or aperture value calculated by the camera body, and the exposure control means captures this exposure time or aperture value. The data imprinting device according to item 1.