JPH0727162B2 - Camera data recorder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a function of recording on a film a numerical value increased or decreased by a constant value (for example, "1") each time a recording command signal is generated. The present invention relates to a data recording device.

2. Description of the Related Art A data recording device having the above function is disclosed in, for example, Japanese Patent Laid-Open No.
Many are known, such as 67134. In these conventional devices, so-called shooting serial numbers are printed on the film, which is convenient for organizing academic photographs, for example.

Problems to be Solved However, since these devices output a print command signal each time the exposure operation of the camera is performed, there are the following inconveniences when a serial number is printed over a plurality of films. . That is, in this case, it is necessary to replace the film on the way, but normal shooting is not performed from the time the film is loaded to the time when the film is wound for three frames (so-called blank feed). . During this idling, the camera is performing the exposure operation, and the imprinting command signal is also output. Therefore, when the film can be exchanged and normal shooting becomes possible, if the number is increased by the imprint command signal in the above-mentioned blank feed period, for example, it is increased by "3", and consecutive serial numbers are imprinted. I couldn't say I was there. Here, by utilizing the fact that the data imprinting device is provided with a changeover switch that is manually operated depending on whether or not data is imprinted, this changeover switch is used during the film exchange as described above. It is conceivable that the serial number does not change by switching to the off position to prohibit the input of the copy command signal. However, it is troublesome to operate this changeover switch at the time of replacement, and if you forget to return this changeover switch to the original ON position at the end of idling, the serial number as well as the imprinting itself can be performed. It has the disadvantage of disappearing and is not practical.

The present invention eliminates the above-mentioned inconvenience, and can prevent the serial number from changing without any manual operation during the operation of advancing the film to the position where the first frame is photographed, which is referred to as jump feed or initial load, An object of the present invention is to provide a data recording device capable of resuming the recording of serial numbers upon the end thereof.

Means for Solving the Problems The present invention relates to an apparatus for recording a numerical value which is increased or decreased by a constant value each time a command signal is generated, in which a loaded film is wound up to a predetermined position for performing the first frame photographing. The operation of the changing means or the changing means and the recording means is prohibited until a signal indicating that the film has been taken is output, and after a signal indicating that the film has been wound to the predetermined position is output. Is provided with control means for permitting the operation of the changing means and the recording means.

Function When the film is exchanged, the numerical value recorded increases or decreases only after the first frame of the film is photographed, so that the serial number is normally recorded.

First Embodiment FIG. 1 is a block diagram showing the whole camera system to which the present invention is applied. The camera body is surrounded by a broken line (BD), and the terminals (T ₁ ) to (T ₉ ) are electrically connected to the camera body (BD).
(BCKC) connected via is a circuit that has a data imprinting function, an interval shooting function, and a calculation function for exposure control of the camera body (BD). This circuit is provided on the camera back cover, This circuit (BCKC) is called a back circuit. The back cover of the camera provided with this back circuit (BCKC) is called back (BCK). The back (BCK) can be attached to and removed from the camera body (BD) so that it can be converted, and the camera body has a circuit that has only the data imprinting function and the interval shooting function. A back cover without a circuit having the function of can be attached instead of this back (BCK). In addition,
Configuration and function of this back (BCK) and back circuit (BCK)
C) will be described later.

The (MDR) connected to the switch (S ₄ ) of the camera body (BD) via the terminal (T ₁₀ ) is the motor drive device (hereinafter simply referred to as the motor drive), and the exposure control operation is completed. Switch (S ₄ ) turns ON, the motor
The motor in the drive (MDR) starts rotating, and the mechanical interlocking mechanism charges the film winding and exposure control mechanism. Then, when charging is completed and the switch (S ₄ ) turns off, the motor drive (MD
The rotation of the motor in R) stops. The motor drive (MDR) is attached to the bottom of the camera body via a connecting mechanism. When the motor drive is not attached, the exposure control mechanism is charged and the film is wound by a manual winding lever. The motor drive (MDR) may be provided inside the camera body (BD).

Camera body (BD) and the terminal (T _11), a data output circuit provided in the (T _12), circuit (LEC) that is connected with (T ₁₃₎ is an interchangeable lens. This circuit (LEC) is electrically connected by mounting an interchangeable lens on the camera body. Then, when the terminal (CSL) of the camera main body becomes “Low”, the operation state is set, and various data unique to the interchangeable lens are sequentially output in series based on the reading clock pulse from the camera main body (BD). This data includes data for confirming the mounting of the interchangeable lens, open aperture value data, maximum aperture value data, focal length data, characteristic data for automatic focus adjustment, and the like. Details and data of this circuit are described in, for example, Japanese Patent Laid-Open Nos. 59-84228 and 59-140408.
Since it is described in the issue, it is omitted.

(MET) is an external exposure meter (hereinafter referred to as a meter). Camera body (BD) and the terminal (T _14), a receiver for receiving the infrared signal sent from (T _15), the circuit being connected in (T ₁₆₎ (REC), the meter (MET). Also, the receiver (REC) and the terminal (T _17), a _{(T 18), (T 19} ) and the connected circuit (FL) is a flash device. The receiver (REC) is attached to the hot shoe of the camera body (BD), and the flash device (FL) is attached to the hot shoe provided in the receiver (REC), resulting in the connection state shown in FIG. Become. It should be noted that the hot shoe of the camera body (BD) may be equipped with only the shiver bar (REC) or the flash unit (FL). In addition, a terminal group that has the same function as the terminals (T ₁₄ ), (T ₁₅ ), and (T ₁₆ ) should be connected to the camera body (B
It is provided on the other part of D) (for example, the bottom of the camera), and one of the flash device (FL) and receiver (REC) is directly attached to the hot shoe, and the other part is connected to the flash device (FL) via an adapter. The other one of the receivers (REC) may be attached.

The meter (MET) can be used as an incident light type or reflected light type exposure meter, and can also measure stationary light and flash light. Then, the exposure control data is calculated based on the measured value, and this data is emitted as serial optical data by the infrared light projection means. In addition to this, the flash data (FL)
Whether or not to make a test flash, and also a meter (MET)
There is data indicating whether or not the control data is sent from. The infrared light data sent from the meter (MET) is read by the receiver (REC) and latched as an electrical signal.

Next, the functions of the flash unit (FL) and the receiver (REC) related to the signal lines (ST ₁ ), (ST ₂ ), and (ST ₃ ) will be described together with the functions of the camera body (BD). First, the signal line (ST ₁ ) is a line for transmitting the light emission start signal,
When the X contact (SX) in the camera body (BD) closes when the running of the front curtain (1C) is completed, the flash device (FL) starts emitting light. The receiver (REC) is a meter (MET)
When a test flash signal is received from the receiver (REC)
Pulls down this terminal (ST ₁ ) to "Low" to start the flash device. The signal line (ST ₂ ) is bidirectional serial data for data transmission from the camera body (BD) to the flash unit (FL), and data transmission from the flash unit (FL) and receiver (REC) to the camera unit (BD). It's a bus. Further, it has a function of transmitting a signal from the flash device (FL) to the camera body (BD), which indicates that the X contact (SX) is closed and the flash device (FL) starts to emit light.

The signal line (ST ₃ ) is a mode for inputting data to the camera body (BD) from the flash unit (FL) and receiver (REC), and the flash unit (FL) from the camera unit (BD).
The line that transmits the data to the flash unit (FL) and the receiver (REC) from the camera body (BD) to the flash unit (FL) with a pulse of different time width from the mode in which the data is output to the is there. Furthermore, the function to transmit the synchronization clock pulse for data transfer from the camera body (BD) to the flash unit (FL) and the receiver (REC), and the signal for stopping the light reception of the flash unit (FL) from the camera body (BD). ) Has the function of transmitting from the flash device (FL).

In the camera body (BD), when the microcomputer (hereinafter referred to as the microcomputer) (BMC) sets the line (CSF) to "Low", the interface circuit (IF) becomes ready to exchange data. Then, when the camera body (BD) inputs data, the microcomputer (BMC) outputs a pulse of the first time width to the signal line (FMO), and this pulse signal is transmitted via the signal line (ST ₃ ). Flash device (FL)
Input to the receiver (REC), and each becomes the data output mode. When a clock pulse for reading data is output from the terminal (SCK) of the microcomputer (BMC), it is output to the signal line (ST ₃ ) via the interface circuit (IF).

Then, the flash device (FL) first outputs 1-byte data to the signal line (ST ₂ ), and this data is read from the data input terminal (SIN) of the microcomputer (BMC) via the interface circuit (IF). . This data is
There are a signal indicating whether the flash device is dedicated to this system, a signal indicating whether the charging voltage of the main capacitor exceeds a predetermined value, a signal indicating whether the flash device is automatically dimmed or the like. The second, third, and fourth bytes are output from the receiver (REC), and this data is also the data input terminal (S) of the microcomputer (BMC).
IN). The data in the second byte is a signal indicating whether or not the exposure control data is sent from the meter (MET), a test light emission signal, and the like. The 3rd byte is the exposure time data from the meter (MET) and the 4th byte is the aperture value data. When the above data input is completed, the signal line (CSF) becomes "High", and data exchange with the flash unit (FL) and receiver (REC) is not performed.

When transmitting data from the camera body (BD) to the flash device (FL), the signal line (CSF) is set to “Low” and the pulse of the second time width is output to the signal line (FMO).
Then, the flash unit (FL) enters the data input mode, and the data from the data output terminal (SOU) of the microcomputer (BMC) is changed based on the synchronization clock pulse from the camera body (BD).
Read bytes of data. This 3-byte data is 1
The second byte is the control aperture value (Av) and exposure control mode, the second byte is the data obtained by adding the film sensitivity and exposure correction data (Sv + Cv), and the third byte is the focal length of the interchangeable lens (f
v). The 1st and 2nd bytes of data are used to calculate and display the shooting distance range in which the proper exposure is compensated by the flash emission, and the 3rd byte of data is the interchangeable lens of the flash unit (FL). It becomes the data for adapting to the shooting angle of view of.

When the camera body (BD) starts the exposure control operation, the signal line (CSF) is set to “Low” and the pulse of the third time width is output to the signal line (FMO). Then, this pulse is read from the signal line (ST ₃ ) by the flash device (FL), and the flash device (FL) enters the light emission mode for exposure control. Then, when the actual exposure control operation starts,
A “Low” pulse is output to the signal line (RL), and the interface circuit (IF) sends the data from the signal line (ST ₂ ) to the flash emission control circuit (FLM) via the signal line (FST). Apply the circuit (FLM) to the line (FS
The signal input via P) is output to the signal line (ST ₃ ). Signal line (ST ₂ ) is flash device (FL)
The signal of "Low" is output until the light emission of is started, and it changes to "High" when the light emission of the flash device (FL) starts. The light emission control circuit (FLM) is equipped with a light-receiving element that receives the subject light that has passed through the shooting optical system and reflected from the film surface, and the signal lines (ST ₂ ) and (FST) are "Hig
When h "changes to" Low ", the integration of the output current of this light receiving element starts. And the integrated value is the film sensitivity (Av) input from the A-D, D-A conversion circuit (ADA). When the value corresponding to the analog signal of the data Sv + Cv by the exposure correction amount (Cv) is reached, a "High" pulse is output to the signal line (FSP), which pulse is sent via the signal line (ST ₃ ) to the flash unit (FL). ) To stop flash firing.

Further, when a pulse is input from the signal line (ST ₃ ) for data transfer, the flash device (FL) can perform a boosting operation for a fixed time (for example, 15 minutes) from the time when the pulse is input. Therefore, every time data is exchanged with the camera body (BD), the boosting operation is performed for a certain period from that point. When using this function to perform interval shooting with flash shooting, a signal to activate the camera body (BD) should be input from the back circuit (BCKC) a fixed time (for example, 1 minute) before the start of shooting. When the camera body (BD) is activated, data is exchanged with the flash unit (FL), and the boosting operation is performed. Therefore, even with interval shooting with flash shooting that has an interval of 15 minutes or more, the flash device (F
The main capacitor of L) is in the charging completed state.

Specific examples of the above meter (MET), receiver (REC), flash unit (FL), interface circuit (IF), flash emission control circuit (FLM) are, for example, Japanese Patent Application No. 59-2.
Since it is described in No. 01381, it is omitted. Further, specific examples of the flash device (FL), interface circuit (IF), and flash light emission amount control circuit (FLM) are described in JP-A-59-59
-231520 and Japanese Patent Application No. 59-48435.

Next, the inside of the camera body (BD) surrounded by a broken line will be described.
(BMC) is a microcomputer, and its operation is shown in the flow charts of FIGS. (BA) is a power supply battery, and a circuit excluding the photometry circuits (FLM), (AM), and A-D / D-A conversion circuit (ADA) directly from this battery (BA) through the power supply line (+ E). Is powered. Transistor (B
T) is controlled by the signal from the output port (OP ₀ ) of the microcomputer (BMC) to "ON" and "OFF", and the transistor (BT) is "ON".
Then, through the power line (+ V), the photometric circuit (FLM),
(AMM), AD / DA conversion circuit (ADA), lens circuit (L
EC) is supplied. (DSP) is a display circuit that displays a metering mode, an exposure control mode, a control exposure time, a control aperture value, a film sensitivity, an exposure correction amount, and a flash device state. Further, when the exposure time and the aperture value are out of control interlocking, the control limit exposure time and the aperture value blink to display a warning. This display circuit (DSP)
When the signal line (CSD) is "Low", the data output terminal (SOU) to the terminal (SC
The serial data sent in synchronization with the clock pulse from K) is read and the display based on this data is performed.

(AMM) is a photometering circuit for ambient light, which has a light receiving element for partial and averaged light metering, which can be switched by "High" or "Low" from the signal line (ASMO). Then, the photometric circuit (AMM) outputs a voltage signal obtained by logarithmically compressing the output current of the light receiving element. The AD, DA conversion circuit (ADA) outputs the output of the photometric circuit (AMM) to the clock from the terminal (CKOUT) of the microcomputer (BMC) when a "Low" pulse is output to the signal line (ADSTA). A-D conversion is performed based on the pulse. Also,
When the signal line (CSA) is "Low" and (ADMO) is "High", A- is synchronized with the clock pulse from the pin (SCK).
Send the D-converted data to the data input terminal (SIN) of the microcomputer (BMC), and the signal line (CSA) is "Low" (ADMO)
Is "Low", the above-mentioned data Sv + Cv from the output terminal (SOU) is read, and this data is DA converted and output to the light emission amount control circuit (FLM). When the signal line (CSA) is "High", data is not exchanged with the microcomputer (BMC). (G ₁ ) is a gate circuit, which becomes active when the signal line (CSL) becomes “Low”, enabling data transfer from the lens circuit (LEC) to the microcomputer (BMC).

(AFC) is a circuit for automatic focus adjustment, and the signal line (AFE
When N) becomes “Low”, it becomes operating state, and when it becomes “High”, the operation stops. When the signal line (CSAF) is "Low", the automatic focus adjustment data from the microcomputer (BMC) is read. Since a concrete example of the automatic focus adjustment circuit (AFC) is shown in, for example, Japanese Patent Laid-Open No. 59-140408, its details are omitted.

(APG) is a means to output a pulse corresponding to the movement of the diaphragm narrowing member, and this pulse is a microcomputer (BMC)
Input to the terminal (CKIN) of. The pulse input to this terminal (CKIN) is input to the event counter in the microcomputer (BMC) and subtracted based on this pulse from the preset data of the number of narrowing stages. And
When the content of the counter becomes "0", it means that the number has been narrowed down by the planned number of narrowing stages, and a counter interrupt occurs, and a pulse for stopping the narrowing is output from the output port (OP ₁₂ ) and the narrowing operation stops.

(MGD) is a magnet circuit, and "Lo" is added to the signal line (RL).
When the "w" pulse is output, the release magnet operates, and the aperture and mirror-up operations start. When the "Low" pulse is output to the signal line (AP), the aperture magnet operates, and the aperture operation starts. Stop When the "Low" pulse is output to the signal line (1C), the front curtain lock release magnet operates and the front curtain starts running.The "Low" pulse is output to the signal line (2C). Then, the trailing-curtain unlocking magnet operates and the trailing-curtain starts to run. (G ₂ ) is a gate circuit, which becomes active state when the signal line (CSB) becomes “Low”, and the back circuit (BCKC) and the microcomputer. Data can be exchanged with (BMC) The signal line (CSB) has a function to activate the back circuit (BCKC), and the camera body (BD)
When the is in the operating state and tries to exchange data with the back circuit (BCKC), the back circuit (BCKC) is also activated. Furthermore, the signal line (CSB) is connected to the back circuit (BCK
When data is imprinted in C), a "Low" pulse is output when the trailing curtain starts running to prevent film winding. When this pulse is input, the back circuit (BCKC) stops the imprinting operation for the time corresponding to the film sensitivity data sent from the camera body (BD). Signal line (BI
O) sends data from the camera body (BD) to the back circuit (BCKC) when it is "High", and sends data from the back circuit (BCKC) to the camera body (BD) when it is "Low". A pulse for imprinting data 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 ₁ ) is a photometric switch that is closed in the first step of pressing down the release button and starts the photometric calculation operation. The back circuit (BC and parallel with the switch (S ₁₎
The signal line (BS ₁ ) is input from KC), and the microcomputer (BMC) can be started from the back circuit (BCKC). From the back circuit (BCKC) to the signal line (B
The start signal is input via S ₁ ) to the back circuit (BC
KC) is operated and the back circuit (BCKC) operates, and as described above, the camera body is set to start boosting the flash unit (FL) 1 minute before starting the shooting operation in interval shooting. There are two types of activation.
The switch (S ₂ ) is a release switch that is closed in the second step of pressing down the release button. When this switch (S ₂ ) is closed, the exposure control operation is activated. In addition, the signal line (BS ₂ ) is connected in parallel from the back circuit (BCKC) in parallel with this switch (S ₂ ), and the back circuit (BCKC)
To transmit the signal to start the shooting operation to the camera body (BD) when shooting a predetermined number of shots (hereinafter referred to as bracket shooting) that have been shifted by a fixed exposure value relative to the proper exposure. It has become. Further, when a predetermined number of frames (hereinafter referred to as the number of frames) have been shot during bracket shooting, the shift to the exposure control operation is switched to the back circuit even if the release switch (S ₂ ) of the camera body (BD) is "ON". It is prohibited from the (BCKC) side, and when the release switch (S ₂ ) of the camera body (BD) is set to “OFF”, it is possible to shift to the next bracket shooting. Therefore, the back circuit (BCKC) looks at the state of the release switch (S ₂ ) of the camera body (BD), and the release switch (S ₂ ) turns “ON” after shooting for the set number of frames by bracket shooting. If so, the data that prohibits the transition to the exposure control operation is transferred to the back circuit (BCK
It is designed to be sent from C) to the camera body (BD). In the interval shooting, the back circuit (BCKC) determines the shooting start time, the number of frames, and how many times (in the following, the number of groups) shooting is performed by this number of frames. Can be set. And the back circuit (BC
From KC), at the start time, the exposure control operation is performed by outputting a “Low” signal to the signal line (BS ₂ ) until shooting for the number of frames is performed. When the photographing of one group is completed, the signal line (BS ₂ ) is set to "Higj", the time count for the set time interval is performed, and the remaining time is displayed. Then, when the remaining time reaches 0 seconds, the signal line (BS ₂ ) is set to “Low” again, and photographing for the number of frames is performed. When the above operation is completed, the set interval shooting mode is released. Even if the back circuit (BCKC) is operating in the interval shooting mode, the set start time and time interval are ignored if the release switch (S ₂ ) of the camera body (BD) is closed. Then, the photographing operation is performed. That is, even if the start time has not been reached, when the release switch (S ₂ ) turns “ON” and the shooting operation starts, the back circuit (BCKC) keeps the signal line (BS ₂ ) until shooting for the number of frames. “Low”
I have to. The same operation is performed when the release switch (S ₂ ) is closed before the set time interval elapses. It should be noted that it is determined that the number of shooting operations performed by the camera body (BD) counts the number of pulses of the data imprinting pulse input from the signal line (IP).

The switch (SMO) of the camera body (BD) is a switch for switching the exposure control mode. The mode changes each time this switch (SMO) changes from "OFF" to "ON". The exposure control modes of the camera are a program automatic exposure control mode (P mode), an exposure time priority aperture automatic exposure control mode (S mode), an aperture priority exposure time automatic exposure control mode (A mode), and a manual exposure control mode (M mode). There is. The respective modes change in the order of P → A → M → S → P .... The switch (SIS) is a switch for setting the film sensitivity, and every time this switch (SIS) changes from “OFF” to “ON”, the film sensitivity changes in steps of 1/3 Ev and reaches the upper limit value. After that, when the switch (SIS) changes from “OFF” to “ON”, it changes to the lower limit value and “OF” again.
It increases again when the switch changes from "F" to "ON".

(SOR) is a switch for setting the exposure compensation amount. Every time this switch (SOR) changes from "OFF" to "ON", 0 → 1 /
2 → 1 → 11/2 → 2 → 21/2 → 3 → 31/2 → 4 → -4 → −31 / 2
→ -3 → -21 / 2 → -2 → -11 / 2 → -1 → −1 / 2 → 0. (ST) is a switch for setting the exposure time, and every time this switch (ST) changes from "OFF" to "ON", it changes to the shorter exposure time side in 1Ev steps. And, in S mode, 32sec → 16sec → 8sec → …… →
It changes in the following order: 1 / 1000sec → 1 / 2000sec → 1 / 4000sec → 32sec → …… In M mode, 32sec → 16sec → ……
→ 1 / 2000sec → 1 / 4000sec → Valve → 32sec → …… Therefore, switch (S
The valve mode can be set by operating T).
The switch (SA) is a switch for setting the aperture value. When this switch (SA) changes from "OFF" to "ON", when the mode is A or N mode, the maximum aperture value is changed from the maximum aperture value in 1 / 2Ev step. Change towards value. Then, when the maximum aperture value is reached, the aperture value is changed to the maximum aperture value. The switches (SMO), (SIS), (SOR), (ST), and (SA) are switches that are closed by operating the operation keys provided outside the camera. Also, the switches (S ₁ ), (S ₂ ),
(SMO), (SIS), (SOR), (ST), (SA) are connected to the interrupt terminal (INT) of the microcomputer (BMC) via the AND circuit (AN), respectively, and therefore the camera When the data setting key provided externally is operated, when the release button is operated, and the "Low" signal is sent from the pack circuit (BCKC) through the signal lines (BS ₁ ) and (BS ₂ ). When input, if the microcomputer (BMC) is in the operation stopped state,
The microcomputer (BMC) receives this interrupt signal and starts operation. The switch (SCN) is a switch linked to a mechanical film counter. This switch (SCN) remains "ON" until the film counter reaches the position indicating "1" of the number of frames, and then "OFF" from the position of "1". The signal from this switch (SCN) is sent to the back circuit (BCK) via the input port (IP ₇ ) of the microcomputer (BMC) and the terminal (T ₉ ).
You are typing in C). Microcomputer (BMC) is switch (SC
While N) is "ON", exposure control is performed with the shortest exposure time and maximum aperture value. On the other hand, the back circuit (BCKC) is a switch (SC
While N) is "ON", the data imprinting operation is not performed even if a pulse signal is input from the signal line (IP). In addition, the back circuit (BCKC) has a function of adding or subtracting "1" from the set value for each pulse from the signal line (IP) that is input each time shooting is performed, and this data is imprinted. While (SCN) is "ON", neither addition nor subtraction operation is performed. If the pulse is not output to the signal line (IP) while the switch (SCN) is "ON", the back circuit (BCKC) looks at the state of the switch (SCN) and imprints the data. It is not necessary to determine whether or not to perform addition / subtraction, and the terminal (T ₉ ) is also unnecessary.
Also, instead of a mechanical film counter, an electric film counter is used, and until the film reaches the regular shooting frame position (counter display is "1"), a "Low" signal is output to the terminal (T ₉ ), And no pulse may be output to the signal line (IP).

The switch (SAS) is a switch that turns “ON” and “OFF” in conjunction with the photometric mode switching member attached to the external appearance of the camera. This signal is input to the input port (I) of the microcomputer (BMC).
Have entered into P _8), the microcomputer (BMC) is a signal line from the if signal "Low" is input output port (OP ₇₎ (A
SMO) outputs a "Low" signal to set the partial metering mode and causes the display (DSP) to display the partial metering mode. On the other hand, if a “High” signal is input to the input port (IP ₈ ), the “High” signal is output to the signal line (ASMO) to set the average metering mode, and the display (DSP) is averaged. Send data to display the mode. Switch (S ₄ )
Is "ON" when the exposure control mechanism finishes the exposure control operation, and "OFF" when the shutter charge operation of the exposure control mechanism is finished.
The signal from this switch (S ₄ ) is input to the input port (IP ₉ ) of the microcomputer (BMC). Microcomputer (BMC) does not migrate even exposure control operation by the release switch (S ₂₎ is "ON" if the input signal of "Low" from the switch (S _4).

The microcomputer (BMC) outputs a pulse of a time width corresponding to the film sensitivity to the signal line (IP), but the back circuit (BCKC) shown in Fig. 1 is output from the camera body (BD). The time corresponding to the read film sensitivity is made in the back circuit (BCKC), and the data is imprinted only for this time width. Therefore, the pulse from the signal line (IP) is used only for the signal to start the imprinting operation. However, it does not have a function to read the film sensitivity data from the camera body and make a time corresponding to this data, and it has a data imprinting unit that imprints data while pulses are being input from the signal line (IP). The back cover provided may be attached to the camera body (BD), so the microcomputer (BMC) has such a function. The back circuit (BCKC) has a function to capture the exposure time and aperture value for exposure control sent from the camera body. Therefore, before the microcomputer (BMC) enters the flow of exposure control and outputs a pulse to the signal line (IP), the exposure time and aperture value must be set in the back circuit (BCK).
C). Therefore, the back circuit (BCKC) uses the exposure for control from the camera body (BD) in order to reduce the probability that the trailing curtain will start running and the data imprinting will be stopped before the appropriate time is reached. The imprinting operation is started when the operation of sending the time and the aperture value is detected.

The operation of the camera system shown in FIG. 1 will be described below with reference to the flowcharts shown in FIGS. Switch (S ₁ ),
Either (S ₂ ) (SMO), (SIS), (SOR), (ST), (SA) becomes “ON”, or the back circuit (BCKC)
When a "Low" signal is input from the signal lines (BS ₁ ) and (BS ₂ ) of, the output of the AND circuit (AN) becomes "Low" and the interrupt terminal (INT) of the microcomputer (BMC) becomes "Low". Stand up.
Then, the microcomputer (BMC), which has stopped its operation, starts the operation from step # 0. First, in step # 0, a "Low" pulse is output to the signal line (CSB),
Activate the back circuit (BCKC), and in step # 1,
Turn on the transistor (BT) to turn on the photometric circuit (FLM),
(AMM), AD, DA conversion circuit (ADA), lens circuit (L
Power supply to EC) is started. Then, in the step of # 2, whether or not the signal of "Low" is input to the input port (IP ₁ ), that is, whether the switch (S ₂ ) is turned on or whether the signal line of the back circuit (BCKC) ( Determine whether the release signal is input from BS ₂ ). And the input port (IP
_{If the} "Low" signal is input to ₁ ), the process proceeds to step # 3. In step # 3, the switch (S ₄ ) turns to “OF”.
If it is "F", it is determined whether or not the charge of the exposure control mechanism is completed, and if it is not "OFF", the exposure control operation cannot be started, so the process proceeds to step # 10. On the other hand, the switch (S ₄ ) If it is "OFF", it is then determined in step # 4 whether the flag RLEF is "1".
RLEF is set to “1” if the exposure control data (Tv, Av) is ready and the release prohibition signal is not input from the back circuit (BCKC). It is reset to "0" when the release prohibition signal (input at the end of bracket shooting) is input from the circuit (BCKC). If the flag RLEF is "1" in the step # 4, the flow proceeds to the exposure control operation starting from the step # 110, and if the flag RLEF is "0", the step moves to the step # 10. In step # 2, input port (IP ₁ )
If a "Low" signal is not input to, the process proceeds to step # 10.

In step # 10, it is determined whether or not the "Low" signal is input to the input port (IP ₀ ). If it is input, the flag S ₁ F is set to "1", and if it is not input. S ₁ F remains “0” and the process proceeds to step # 12. This is a preparatory operation for determining whether "Low" is input to the input port (IP ₀ ) by the switch (S ₁ ) or the back circuit (BCKC). Next, in step # 12, one of the partial and average light receiving elements in the photometric circuit (AMM) is selected according to the state of the switch (SAS), and the process proceeds to step # 13. In the step of # 13, the signal line (CSL) is set to “Low” and the serial input / output operation is repeated a plurality of times,
Various data is read from the lens circuit (LEC), then in step # 14, the output of the A / D conversion clock is started from the clock output terminal (CKOUT), and the signal line (AD
STA) outputs a "Low" pulse to start the operation of AD conversion of the output of the photometric circuit (AMM) by the AD, DA conversion circuit (ADA).

Next, in step # 20, it is determined whether or not the flag S ₁ F is set to "1" in step # 11. If it is set, the process proceeds to step # 21.
Go to 24 steps. The fact that the flag S ₁ F is not set means that the switch (S ₁ ) and the back circuit (BCKC)
It means that it is not the operation by the signal line (BS ₁ ) of
At this time, the signal line (AFEN) is set to "High" in the step of # 25 to set the flag S ₁ F in order to prevent the photographing lens from being inadvertently moved by the automatic focus adjustment operation.
Is reset to "0" (in this case, it has already been reset to "0"), and the routine proceeds to step # 26. On the other hand, # 20
If the flag S ₁ F is "1" in the step of, the next step is # 21 to determine whether the input port (IP ₀ ) is still "Low". This is because the back circuit (BCKC) starts the boosting operation of the flash device 1 minute before the interval shooting, or when the back circuit (BCKC) starts the operation for exposure calculation, the camera body (BD) is To activate it, it outputs a "Low" pulse to the signal line (BS ₁ ). By the way, it is not desirable that the lens is inadvertently moved by performing the automatic focus adjustment operation when the camera body (BD) is activated by the back circuit (BCKC). Therefore, when the back circuit (BCKC) activates the camera body (BD), the time from the time the interrupt signal is input to the microcomputer (BMC) to the step of # 21 is shorter than the time to the step of # 21. Longer than "Lo
The w "pulse is output to the signal line (BS ₁ ) and
At the time of determining whether the input port (IP ₀ ) is “Low” in step, the signal line (BS ₁ ) is “Hig”.
In this case, therefore, in step # 24, the signal line (AFEN) is set to “High” so that the automatic focus adjustment operation cannot be performed.
Go to step. On the other hand, if it is determined in step # 21 that the input port (IP ₀ ) is "Low", it means that the photometric switch (S ₁ ) is "ON" at this time. Set the line (AFEN) to "Low" to activate the automatic focus adjustment circuit (AFC), and set the signal line (CSA
F) to "Low" to send automatic focus adjustment data, and to return the signal line (CSAF) to "High". Then, in step # 25, the flag S ₁ F is reset to "0" and # 26 Go to step. In step # 26, the flash unit (F
L) and the data reading from the receiver (REC). This operation is performed by setting the signal line (CSF) to "L" as described above.
ow ", and outputs the pulse of the first time width to the signal line (FMO). And the serial I / O operation is performed. First, the above-mentioned first byte data from the flash unit (FL), and then the receiver (REC ), The data is output in the order of the second, third, and fourth bytes of the above-mentioned data read from the meter (MET), and this data is read, and the signal line (CSF) is set to “High”. The operation of step # 26 is completed.

Next, in step # 30, it is determined whether or not the film sensitivity setting switch (SIS) has changed from "OFF" to "ON".
Increase by 1/3 Ev and move to step # 32. on the other hand,
If it is not determined that there is a change, the process immediately moves to step # 32, and the exposure compensation amount setting switch (ORS) is set to "OFF".
To determine whether it has changed from "ON" to "ON". When a change is detected, the exposure correction amount is increased by 1/2 EV in step # 33 and the process proceeds to step # 34. If no change is detected, the process directly proceeds to step # 34.

In step # 34, it is determined whether or not the switch (SCN) is "ON", and if it is "OFF", the process proceeds to step # 40. On the other hand, if the switch (SCN) is "ON", it means that the film counter is not in the display state of the number of regular photographing frames ("1") (S ...). At this time, the process proceeds to step # 35. . In step # 35, the shortest exposure time (Tvmax) and the maximum aperture value (Avmax) corresponding to the minimum aperture are set for control, the flag RLEF is set to "1" in step # 108, and then in step # 75. Move to. Even when the control data from the back circuit (BCKC) or meter (MET) is read from the receiver (REC) until the number of regular shooting frames is reached, the camera body ignores this data and performs exposure control with Tvmax and Avmax. It will be. In this case, the exposure calculation is not performed in the camera body (BD), and the settings other than the data of the film sensitivity and the exposure correction amount cannot be accepted. Moreover, even if the data for prohibiting the exposure control operation is input from the back circuit (BCKC), it is ignored.

In step # 40, it is determined whether the flag BCKF is "1". For this flag BCKF, the back circuit (BCKC) calculates the exposure control data, sends this data to the camera body (BD), and the camera body (BD) controls the exposure based on this data. Data (hereinafter back ICP
Is set to "1" when it is read, and it is reset to "0" otherwise. Therefore, since it is always reset to "0" at the first operation, # 41
Go to step. On the other hand, when the exposure control is performed based on the data from the back (BCKF = 1) # 43
Immediately #
Move to step 51. Therefore, the switch (SMO),
The data is not changed even if (ST) or (SA) is operated.

In step # 41, it is determined whether or not the mode switch (SMO) is changed from "OFF" to "ON", and when the change is determined, the exposure control mode is changed. On the other hand, switch (SM
If O) remains “OFF” or remains “ON”, the exposure control mode remains the same and the process proceeds to step # 43. # 43
In step (4), it is determined whether or not the mode is the S, M mode. Since the S, M mode accepts the change of the exposure time, the process proceeds to step # 44. On the other hand, if the mode is not the S or M mode, the process immediately proceeds to step # 46. In step # 44, it is determined whether or not the switch (ST) has changed from "OFF" to "ON", and when the change is detected, the exposure time is increased by 1 Ev. On the other hand, if the change in the switch (ST) is not detected, the process immediately proceeds to step # 46. As mentioned above, after the shortest exposure time (1/4000 sec), switch (S
When T) changes from "OFF" to "ON", it changes to the longest exposure time (32 sec) in S mode, and changes to a valve in M mode. In step # 46, it is determined whether the mode is A or M. If the mode is not A or M, the aperture value setting cannot be accepted. Determine the change of the switch (SA) with. Then, if there is no change, the process directly proceeds to the step # 50, and when the change from "OFF" to "ON" is discriminated, the aperture value is increased by 1 / 2Ev and the process proceeds to the next step # 50. . The change of the switches # 30, # 32, # 41, # 44, and # 47 from "OFF" to "ON" is detected at each step, and the state of the switch at that time is stored. It can be detected by comparing the state of the switch at the time of the step with the signal storing the previous state.

In step # 50, the signal line (CSA) is set to "Low", then serial input / output operation is performed to read the A / D converted data in series, and the signal line (CSA) is set to "High".
Then, the output of the clock from the clock output terminal (CKOUT) is stopped and the process proceeds to step # 51. And # 51
In the step of # 5, it is determined whether the flag BCKF is “1”, and if it is “1”, # 55, 53
Go to step. On the other hand, if the flag BCKF is "0", the process proceeds to step # 52, and it is determined whether or not the charging completion signal is input from the flash device (FL). If the charge completion signal is input, the exposure calculation for flash photography is performed in step # 53, and if the charge completion signal is not input, the exposure calculation for constant light photography is performed.
When the above operation is completed, the microcomputer (BNC) goes to # 55.
Move to the operation of step. Specific examples of the operations of # 53 and 54 are, for example, JP-A-59-111132 and JP-A-59-140408.
No.

In step # 55, the signal line (CSB) is set to "Low", the signal line (BIO) remains "High", and data is transferred to the back circuit (BCKC). The following data is sent from the camera body (BD). First, the first byte is the data sent from the flash device, the second byte, the third byte, and the fourth byte are the data from the meter (MET) read from the receiver (REC). When it is determined that the exposure control data from the meter (MET) has been input, the back circuit (BCKC) performs display based on this data and sends this data back to the camera body (BD) as control data. This function is called an external function. What kind of exposure is this external function if the function that performs the exposure calculation by the back circuit (BCKC) (hereinafter called the exposure function) is active when the exposure control data from the meter (MET) is input? Mode (3 types of P mode, S, A,
M mode and manual long time (M / LT) mode)
Even if is selected, it becomes an external function and controls the exposure based on the data from the meter (MET).
Further, when the exposure function is in the active state, a function that stores a plurality of photometric values from the camera can be activated (hereinafter referred to as a multi-function). In this function, the average value of multiple stored photometric values Mode (average mode), mode that calculates the intermediate value ((Bvmax + Bvmin) / 2) between the maximum and minimum stored photometric values (center mode), and the value that reproduces the maximum value at the upper limit of film latitude (Bvmax There is a mode (highlight mode) for obtaining −2.3) and a mode (shadow mode) for obtaining a value (Bvmin + 2.7) that reproduces the minimum value at the lower limit of latitude. Even if such a multi-function is active, if the exposure control data is input from the meter (MET), it becomes an external function and the multi-function becomes invalid. Further, when the exposure function is in the active state, the function for performing bracket shooting (bracket function) may also be in the active state. At this time, if it is determined that the exposure control data from the meter (MET) is input, bracket shooting is performed based on the exposure control data from the meter (MET).

5 sent from the camera body (BD) to the back circuit (BCKC)
The byte data is the photometric data (Bv-Av ₀ ) (Av ₀ ; open aperture value) read from the AD / DA conversion circuit (ADA), and the 6th byte is the open read from the lens circuit (LEC). Aperture value data (Av ₀ ), the 7th byte is maximum aperture value data (Avmax). Furthermore, the 8th byte is the shortest exposure time data (Tvmax), and the 9th byte is the longest exposure time data (Tvm).
in), the 10th byte is the flash exposure sync limit exposure time data (Tvx), the 11th byte is the exposure time data (Tv) obtained by the camera body (BD), and the 12th byte is the aperture value data obtained by the camera body. (Av). Furthermore, the 13th byte is the film sensitivity (Sv), and the 14th byte is the exposure compensation amount (Cv). When the above data transfer is completed, the microcomputer (BMC) of the camera body (BD) moves to step # 56 and sets the signal line (BIO) to "Low". Then, 1 byte of data is sent from the back circuit (BCKC). This data is the back ICP described above. Back circuit (BCK
If the exposure function is selected in C), for example, “8
0H "(H indicates hexadecimal number) data is sent, and if the exposure function is not selected, the back circuit (BCKC) does not output this data and the camera body (BD) outputs" 00H ".
To read. When the reading of the back ICP data is completed, the microcomputer (BMC) sets the signal lines (CSB) and (BIO) to "High" and shifts to step # 57.

In step # 57, it is determined whether or not the back ICP is "80H". If it is not "80H", the back cover without the back circuit (BCKC) is attached or the back circuit (BCKC).
When the exposure function is not selected in
At this time, the calculation or meter (MET) in the camera body
In order to perform the operation based on the data from, the flag BCKF is reset to "0" in step # 58, and the process proceeds to step # 90. If it is determined in step # 57 that the back ICP is "80H", it means that the exposure function is selected, and the process shifts to step # 60 to set the flag BCKF to "1". And the back circuit (BCK
In step # 61, a sufficient time is waited for the back circuit (BCKC) to calculate the exposure control data based on the data sent to C). During this time, the back circuit first calculates the photometric value based on the sent data. During this period, the signal line (CSB) remains "Low". This means that (Bv-A
v ₀ ) + Av ₀ = Bv is only calculated, but when multifunction is selected, it depends on the mode selected from the above-mentioned average mode, center mode, highlight mode, and shadow mode. Calculate. In the case of multi-function, unless the memory operation (pressing the memory key) is performed, the exposure calculation based on that data is performed every time the photometric data from the camera body (BD) is updated. After that, the control data is calculated based on the stored photometric data, and the data from the camera body (BD) is only displayed. Then, the exposure data is calculated according to the photometric data thus obtained and the set exposure mode to calculate the control data. This operation is
As the program mode, the first program (P ₁ ) mode (Principally Av = 2/3 · Ev, with a slope of 2/3 that divides Bv + Sv = Ev into the aperture value and the exposure time at a ratio of 2: 1 Tv = 1/3 ・
Ev), second program (P ₂ ) mode with slope 1/2 (Av = 1
There are three types: / 2 ・ Ev, Tv = 1/2 ・ Ev) and third program (P ₃ ) mode (Av = 1/3 ・ Ev, Tv = 2/3 ・ Ev) with a slope of 2/3. . In S mode, Ev-Tv = Av is calculated from T set in the back circuit (BCKC), and in A mode, the set Av is set.
Ev−Av = Tv was calculated from the above, and M mode was set.
Calculate Av and Tv as control values. Note that the calculated Av is A
If v> Avmax, EV−Avmax = Tv; if Av <Av ₀ , EV−
Av ₀ = Tv is calculated and Tv and Avmax or Tv and Av ₀ are used as calculated values. Similarly, when Tv <Tvmin, Tvmin and EV
-Tvmin = Av is Tvmax and EV-Tvmax = Av when Tv> Tvmax
Is the calculated value. Also, in P ₁ , P ₂ and P ₃ modes,
Limit the aperture with manually set Av ₁ and Av _{2 such} that Av ₀ <Av ₁ and Av ₂ <Avmax.

Also, in the M / LT mode, it is possible to set a longer exposure time than the maximum exposure time (Tvmin) that can be set on the camera body. When such a time is set, the valve data is sent to the camera body (BD), the camera body is set to the valve mode, and this time is counted by the back circuit (BCKC). During this time, the signal line (BS ₂ ) is set to "Low".
As a result, the trailing curtain is prevented from running, and when the count ends, (BS ₂ ) is set to “High” to run the trailing curtain. The display data of the camera body is not the valve display data but the set time display data. If the multifunction is not selected, the exposure control diagram and the Ev value line in each mode are graphically displayed on the back side with the vertical axis representing the aperture value and the horizontal axis representing the exposure time. When the multi-function is selected, each stored value and the current value based on the exposure control value are displayed graphically.

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

Also, when it is determined that the charging completion signal is included in the data from the flash device input via the camera body, at this time, the back circuit does not perform the above-mentioned calculation display and the camera body (BD ) From Tv, Av is displayed and the data is used as control data. This is because the calculation for flash photography (step # 53) on the camera body side has a considerable function as shown in, for example, Japanese Patent Laid-Open Nos. 59-140408 and 59-111132. This is because there is no need to perform calculations for flash photography on the back circuit (BCKC) side. Note that, for example, in order to correspond to the camera body that does not have the function for flash photography as described above, the back circuit side performs the same calculation as the step of # 53, and when the charging completion signal is input, the exposure is performed. If the function is selected, the flash function is automatically selected, and calculation may be performed according to the exposure mode set at that time and control data may be sent to the camera body. Further, it is possible to prepare an operation that combines a multi-function, a bracket function and a flash function, and send the operation result to the camera body (BD).

After a sufficient time to complete the above operation, the microcomputer (BMC) shifts to step # 62, sets the signal line (BIO) to "Low", and performs serial input / output operation. , Read the data from the back circuit (BCKC). The first byte of this data is the control exposure time data (valve in M / LT mode), the second byte is the control and display aperture value data, and the third byte is the display exposure time data (M / LT
Exposure time in mode), 4th byte is back exposure mode (P ₁ , P ₂ , P ₃ is P mode, M, M / LT mode is M
Mode, external function is meter metering mode), 1,
There are two-byte control data that indicates that Ev is data limited to the limit value because Ev is out of control interlocking, and data that indicates whether exposure control operation is prohibited (release prohibition data). When the 4-byte data is read, the microcomputer sets the signal lines (CSB) and (BIO) to "Hig".
In step # 63, the read Tv and Av are set as control data. Then, it is determined whether the release prohibition data is read, and if read, the flag RLEF is set to “1”. If it is not read, the flag RLEF is reset to "0" and the process proceeds to step # 70.

In step # 70, the exposure mode is displayed according to the read mode data (M mode in the metering mode), and in step # 71, it is determined whether or not the non-interlocked data is read and the data is read. If so, the warning is displayed, and if not read, the warning is not displayed and the process proceeds to step # 74. In step # 74, the meter photometry mode or the average photometry mode or the partial photometry mode is displayed on the camera body (BD). In step # 75, the control exposure time and aperture value are displayed. When long exposure time data is sent from the back circuit (BCKC), valve data is sent for control, but this long data is sent for display. This data is displayed. Next, in step # 76, the film sensitivity and exposure compensation amount are displayed.
Based on the data sent from the flash unit (FL), it displays whether or not flash photography will be performed. next,
In step # 78, the signal line (CSF) is set to "Low",
The pulse of the second time width is output to the signal line (FMO). When the flash unit (FL) reads this pulse, it becomes a state of reading the data from the camera body. In the microcomputer (BMC), the first byte is the control aperture value and the exposure control mode, the second byte is the data obtained by adding the film sensitivity and the exposure correction amount (Sv + Cv), and the third byte is the focal length data of the interchangeable lens ( fv). The method of using these data is as described above.

When the above operation is completed, the switches (S ₁ ), (S ₂ ), (SMO), (SIS), (SOR), (S
It is determined whether at least one of T) and (SA) is closed. If even one is closed, the timer is reset and started in step # 80, and # 2
Then, the operation explained above is repeated. On the other hand, if all of the above steps are "OFF", it is determined in step # 81 whether the count time (10 sec) of the timer started in step # 80 has ended, and if not, the step returns to step # 2. Return. On the other hand, when all of the above switches are turned "OFF" and 10 seconds have passed, the process proceeds to step # 85. Then, in step # 85, the interrupt pin (INT) can be interrupted, and flags RLEF and BCK
F is reset to "0", the display is turned "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", the flag BCKF is reset to "0" in step # 58, and the process proceeds to step # 90 in FIG. In step # 90, the exposure control data is read from the meter (MET) by the receiver (REC), and this data is read by the camera body (B
Determine whether or not D) was read. When it is read, the process proceeds to step # 91, and when it is not read, the process proceeds to step # 100. In step # 91, the data from the read meter (MET) is limited within the range of the maximum aperture value and the maximum aperture value for the aperture value. Within the range, if shooting with flash, limit within the range of the synchronization limit and the longest exposure time. Then, the data from the meter (MET) thus obtained is set as a control value, and the M mode is set as the exposure control mode and the meter photometry mode is set as the photometry mode, and the process proceeds to step # 105. On the other hand, when 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. The setting of the control aperture value at # 63, 92, 100 corresponds to the setting of the number of aperture steps (Av-Av ₀ ). In step # 101, the exposure control mode of the camera body (BD) is displayed, the metering mode is further displayed, and the process proceeds to step # 105. When the control data is limited to the interlocking limit data, the warning display is set to "ON", and when not limited, the warning display is set to "OFF" and the flag RL is set.
Set EF to "1" and move to step # 75 in FIG.

If the input port (IP ₁ ) is “Low”, the switch (S ₄ ) is “OFF”, and the flag RLEF is “1” in the step # 2, # in FIG.
The exposure control operation from step 110 is performed. First # 110
In the step, the signal line (AFEN) is set to "High" to stop the operation of the automatic focusing circuit (AFC), and then the release signal is transmitted to the flash unit (FL). This operation sets the signal line (CSF) to "Low" and the signal line (FMO)
The pulse of the third time width is output to the signal line (CSF)
Is made high again. When the flash unit (FL) determines that the pulse having the third time width is input, the flash mode is set to the light emission mode for photographing. Next, the signal line (CSB) is set to “Low”, and the 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 the data imprinting operation when the imprinting function is selected. In the imprint function, as the imprint mode, control data mode,
Year / month / day mode, month / day / year mode, day / month / year mode, month / day / hour mode, day / hour / minute mode, hour / minute / second mode, count up mode, count down There are modes and fixed data modes. In the control data mode, the control data calculated by the back circuit (BCKC) (only when the exposure function is selected) or the camera body (BD)
The control data sent from step # 112 to # 112 are copied. Year / month / day mode, month / day / year mode, day / month /
Year mode, day / month / hour mode, day / hour / minute mode, hour /
In the minute / second mode, each data from the calendar circuit of the back circuit (BCKC) is copied in the order of the mode name. In the count-up mode and count-down mode, the value obtained by adding or subtracting "1" to or from each preset is imprinted on the preset fixed value. Fixed data mode imprints preset values.

In step # 113, the microcomputer (BMC) next sets the signal lines (CSA) and (ADMO) to "Low", and adds the film sensitivity and exposure correction amount data (Sv + Cv) to the AD / DA conversion circuit. Send to (ADA). When the circuit (ADA) reads this data Sv + Cv, it performs DA conversion and outputs it to the flash emission control circuit (FLM). Next, set the film sensitivity on the timer to control the imprinting time, and at step # 115, set the signal line (IP) to "Low" and back circuit (BCKC).
It is possible to determine the start of data imprinting as described above, and the imprinting operation of the data imprinting device having no imprinting time control function is started. Then, the interruption by the timer is enabled and the counting of the timer is started. Then, in step # 120, the counter interrupt is enabled, a "Low" pulse is output to the signal line (RL) to operate the release magnet, and the narrowing-down operation and the mirror-up operation are started. Then, in step # 122, wait for a sufficient time to complete the mirror-up operation. During this time, the pulse from the aperture pulse output circuit (APG) is input to the clock input terminal, and the aperture stage number data preset in the down counter is subtracted each time the pulse is input. When the content of the counter becomes "0", the counter is interrupted and the operation of step # 150 is performed. In this step, a "Low" pulse is output to the signal line (AP) to operate the diaphragm magnet and stop the diaphragm operation. Then, the timer interrupt is enabled and the process returns to the main routine. In addition, the counter interrupt may not be applied when an interchangeable lens that cannot control the aperture is attached, or when the interchangeable lens is not attached.
When a certain period of time elapses in step # 122, the process proceeds to step # 123, where the counter interrupt is disabled and the process proceeds to step # 125.

In step # 125, it is determined whether the control exposure time data is a valve. If it is not a valve, the process proceeds to step # 126.

In step # 126, a "Low" pulse is output to the signal line (1C) to operate the front curtain magnet to start traveling of the front curtain. Next, the exposure time is counted, and when the count is finished, a "Low" pulse is output to the signal line (2C), the rear curtain magnet is activated, and the rear curtain is started to move to step # 135. . If it is determined in step # 125 that the valve is a valve, the process proceeds to step # 130 and the leading curtain is run. And the input port (I
Wait for the input signal to P ₁ ) to become "High". At this time, if the back circuit (BCKC) is not installed, wait for the release button to be released and the switch (S ₂ ) to be “OFF”. When the switch (S ₂ ) is “OFF”, the rear curtain Start running. On the other hand, the back circuit (BCKC) is installed, and M / LT
When is selected, the back circuit (BCKC) starts time counting from the time when the signal line (IP) becomes “Low”, and the signal line (BS ₂ ) is set to “Low”.
Then, when the count of the back circuit (BCKC) ends,
The signal line (BS ₂ ) is set to “High”, and the camera body (BD) starts running the rear curtain with this signal. In this way, when in M / LT mode, exposure time counting starts with the signal input from the camera body (BD) via the signal line (IP), not at the start of the first curtain, and 1 second Although the exposure time is not precisely controlled because it is controlled as the minimum unit, the error does not affect the exposure so much because the overall exposure time is long.

Normally, the timer corresponding to the film sensitivity has finished counting up to the step of # 135. When the timer finishes counting, a timer interrupt occurs and the signal line (IP) is set to “High” at the step of # 145. "Stops the imprinting operation, enables counter interruption and returns to the main routine. In step # 135, when the exposure time is short, the signal line (IP) may be "Low" even when the trailing curtain starts running. Therefore, in order to forcibly stop the imprinting operation (to prevent imprinting during winding), the signal line (IP) is set to "High". In step # 136, the signal line (CS
A low-level pulse with a fixed time duration is sent to B), and the back circuit (BCKC) terminates the copying operation when this pulse is input from the signal line (CSB). Then, the counter and the timer interrupt are not accepted, and the operation of the trailing curtain is completed and the switch (S ₄ ) is turned on. Then, when the switch (S ₄ ) is turned "ON", the flags RLEF and BCKF are set to "0".
Then, the process returns to step # 2 and the above-described operation is performed.

When the continuous shooting mode such as the interval function / bracket function is selected in the back circuit (BCKC), the “Low” signal remains input from the signal line (BS ₂ ), and during the winding operation, the above The exposure control is being prepared, and the next exposure control operation is performed immediately after the winding is completed and the switch (S ₄ ) is turned off. Also, the release switch (S ₂ ) is "ON".
Even when it is left as it is, such continuous shooting is performed.

When the camera body (BD) is started by the signal from the signal line (BS ₁ ) of the back circuit (BCKC), the automatic focus adjustment operation is not performed.
L) Start-up to start boosting and back circuit (BCK
The width of the starting pulse may be distinguished from the starting when the key operation of C) is performed, and the automatic focus adjustment operation may be performed when the key operation of the back circuit (BCKC) is performed. In addition to this, there is a buzzer or the like that warns of camera shake when the back circuit (BCKC) is not activated when it is activated and when the photometric switch (S ₁ ) is activated. In addition, the signal from the back circuit (BCKC) is a pulse with a width of a fixed time or less in order to determine what the start signal is due to the microcomputer (BMC), but it is different from the switch (S ₁ ). If input is made to the input port, such measures as limiting the pulse width are unnecessary.

In the back circuit (BCKC), it is possible to control the exposure time longer than the longest exposure time of the camera body only in M / LT mode, but in any mode if the exposure function is selected. It may be possible to control the exposure time for a long time, or even when an external function is selected.

Also, during interval shooting, a start signal is sent to the camera body (BD) one minute before the shooting operation of one group is started, and the camera body (BD) exchanges data with the flash device (FL). The boosting of the flash unit (FL) is starting. By the way, since the flash device continues the boosting for 15 minutes when the boosting operation is started, the boosting is very often continued even after the photographing of one group is completed. If the group interval is very long, the boosting after the shooting of one group is wasted and the battery is wasted. Therefore, when the shooting of one group is completed, the data indicating that the shooting of one group is completed is sent from the back circuit (BCKC) to the camera body (BD) (for example, the least significant bit of the back ICP is set to “1”). When this data is input, the camera body (BD) sends a boosting prohibition signal to the flash device (FL) (flash device (FL)
Of the 3-byte data to be transmitted to the flash device (FL), or the flash device (FL) may stop the boosting operation when this data is input.

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

FIG. 4 shows an external view of the back (BCK). (1) is the battery cover of the battery chamber, and (2) is the external display, which shows the operation stopped state. (3) shows a key cover for protecting some keys of the operation key section, (4) shows a grip section, and (5) shows an operation key section.

FIG. 5 shows a state in which the external display portion is in an operating state and the key lid (3) is opened in FIG. The function of each key will be described. (6) is a function key for selecting each function. (7) is a mode key to select a mode in each function. (8) is the operation key,
Switches execution and non-execution of each function.
(9) Enter key to change the external display in sequence.
(10) is an adjust key to change the external display from the control status to the numerical setting status and from the numerical setting status to the control status. (11) is the up key and (12) is the down key to change the value in each mode and shift the program line. (13) is a cursor key, and sends each digit to be changed when changing the value in each mode. (14) is a memory key that accepts photometric data from the camera. (15)
Use the memory clear key to clear all the photometric data imported with the memory key.

Fig. 6 shows the operating status in the external display, EXPOSURE
The P ₁ mode of the function is displayed. Each display section will be described. (16) is a character display unit that uses a 5 × 7 dot liquid crystal display for 10 digits, and displays shutter speed values, aperture values, mode names, operating procedure messages, and the like. (17) shows the display positions of the shutter speed value <T> and the aperture value <F>. (18) displays the mode selected in EXPOSURE function. (19) indicates each function name, and function key (6)
Each time you press, EXPOSURE → (MULTI ・ M) → (BRACKET) →
IMPRINT → INTERVAL → B & W → EXPOSURE → …… MULTI M function and BRACKET function are skipped and cannot be selected when EXPOSURE function is not executed. Also, the EXTERNAL function can be executed only when the control data from the camera (BD) is input from the camera body (BD) while the EXPOSURE function is in execution, and cannot be selected with the function keys. (20) is an external display
It is a symbol indicating the selected function. (2
1) is a symbol indicating that each function is in the execution state. (22) is an index showing the shutter speed value, and (23) is an index showing the aperture value. When the shutter speed value is 2 seconds or less When the aperture value is F32 or more Display also with. (24) is the graphic display (2
5) indicates a photometric line, which is referred to as an EV line in the following because it shows an equal EV value. (26) shows the P ₁ mode with a slope of 2/3, which is a high-speed program on the program line. Depending on the lens, the limit is F1.4 on the open side and F22 on the aperture side,
Further, the arbitrary aperture restriction is performed between F2 and F8 and F11. Lowercase numbers are 1 / in the character display area
It shows 4EV units and displays the control point <1/60, F4 + 1 / 4EV>, which is the intersection of the program line and the EV line.

FIG. 7 shows the P ₂ mode in which the slope of the program line is 1/1, and FIG. 8 shows the slope of the program line in 1/2.
Shows the P ₃ mode. As you can see from this figure
In the P ₁ mode, the graphic display dots are on the F value side.
In 1EV pitch, also when the P ₃ mode display dot exposure time side in the 1EV pitch is displayed as a straight line. Table 1 shows the transition of each function and each mode. The mode in the double frame is initially set at power-on reset such as battery replacement. The operation procedure for each mode in each function will be described.

FIG. 9 shows the P ₂ mode of the EXPOSURE function. By FUNC key (6) Move to select the EXPOSURE function, then MO
Put out a "PROGRAM2" display mode name displayed on the character display unit (16) by the DE key (7), is set to P ₂ mode. EXPOSURE function mode display (18) is on top of "P" Is lit. In the graphic display (24), the program line is restricted by the camera shutter speed control limits of 1/4000 seconds and 30 seconds and the lens control limits of F1.4 and F22. In addition, the inclined part of the program line passes the point of F5.6 for 1/250 seconds in the initial setting state.
Next, press the OPE key (8) and the EXPOSURE function will be in the execution state, as shown in Fig. 10. (21) lights up, and an EV line (25) corresponding to the photometric value appears. Next, press the ENT key (9) to switch from the mode name display (“PROGRAM2”) to the control display (hereinafter called OUTPUT display). In this case, the shutter speed value 1/60 second and F2.8, which is the intersection of the program line and the EV line, are displayed in the character section (Fig. 11). In the OUTPUT display, the UP line (11) and DOWN key (12) can be used to shift the slope of the program line. FIG. 12 shows a state of shifting to the right by the UP key (11). Next, press the ADJ key (10) to switch to the setting display (hereinafter referred to as INPUT display), and first ask the FMAX value. Thirteenth
In the figure, the FMAX value is F22 because it is the initial setting. DOWN
When the FMAX value is lowered to F8 with the key (12), the inclined part of the program line stops at F8, as shown in Fig. 14.
There are restrictions. After setting the FMAX value, go to FMIN with the ENT key (9). In Fig. 15, the character display switches to FMIN value setting. F for initial setting
1.4 is displayed. Change the FMIN value with the UP key (11). FIG. 16 shows a state in which F2.8 is set. Next, press the ENT key (9) to confirm that “COMPLET”
The ED "display is displayed in the character section. When the completion display appears, the ADJ key is used again to switch to the OUTPUT display, and the character display section displays the camera control value (Fig. 18).

Next, the S mode (shutter speed priority mode) of the EXPOSURE function will be described. When the "S MODE" is displayed on the character display by pressing the MODE key (7) and the S mode is selected, it is displayed as shown in FIG. OP here
Execution is enabled by the E key (8). (Also, due to the lens, it is restricted to F1.4 and F22.) When switching to OUTPUT display with the ENT key (9), an underline (cursor) is displayed in the shutter speed value display section of the character display section (16). (Fig. 20). The underline indicates that the value can be changed with the UP key (11) or DOWN key (12). 1 with UP key (11)
If you change from 125 seconds to 1/500 seconds, it will look like Figure 21. At the same time, the aperture value also changes to the proper exposure value.

Next, the A mode of the EXPOSURE function (aperture priority mode) will be described. When the "A MODE" display is displayed on the character display section by the MODE key (7) and the A mode is selected, it is displayed as shown in FIG. It is in the execution state by the OPE key (8). Also, 30 seconds depending on the camera And 1/4000 second is limited. O with the ENT key (9)
When switching to UTPUT 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). Change from F5.6 to F11 + 2 / 4EV with the UP key (11), and the result will be as shown in Fig. 24. At the same time, the shutter speed value also changes to the proper exposure value.

Next, the M mode (manual mode) of the EXPOSURE function will be described. When the "M VODE" display is displayed on the character display section (16) by the MODE key (7) and the M mode is selected, it is displayed as shown in FIG. It is in the execution state by the OPE key (8). Also, the shutter speed and aperture are limited by the camera and lens. When the display is switched to the OUTPUT display with the ENT key (9), it becomes as shown in Fig. 26. At this time, an underline is displayed in the shutter speed value display section, indicating that the numerical value can be changed (Fig. 26). Change from 1/250 seconds to 1/1000 seconds with the UP key (11), and the result will be as shown in Fig. 27. Then use the cursor key (13) to move the underline (cursor) to the aperture value display (Fig. 28) and press the DOWN key (12).
If you change from F5.6 to F2.8 + 2 / 4EV, it will be as shown in Fig. 29.
When the cursor key (13) is operated again, the underline shifts to the shutter speed value display section, and the shutter speed can be changed.

Next, the long time mode of the EXPOSURE function will be described. Press the MODE key (7) to display "M MODE / LT" on the character display and select the long time mode. The display will be as shown in Fig. 30. It is in the execution state by the OPE key (8). When you switch to the OUTPUT display with the ENT key (9), it becomes as shown in Fig. 31. The underline indicates on the aperture value display that the aperture value can be changed, but the cursor key (13) is disabled and the shutter speed value (long time) cannot be changed.
Not possible with OUTPUT display. Then use the ADJ key (10) to INP
When changed to UT display, the shutter speed value can be set as shown in Fig. 32. The shutter speed value (long time) can be set from 10 seconds to 9990 seconds.
Can be set in seconds. The underline is first set at the thousandth digit, and sequentially shifts to the hundreds digit, the tenth digit and the ones digit, and the thousandth digit again, and the UP key (11) or DO
Use the WN key (12) to change the value (Fig. 33, 34)
Figure). When the setting of the shutter speed value (long time) is completed, press the ADJ key (10) again to switch to the OUTPUT display. The camera control value is displayed on the character display (Fig. 35).

Next, the AVERGE mode for performing the average calculation of the MULTI.M (multimetering) function will be described. This MULTI / M function can be set with the FUNC key (6) when the EXPOSURE function is in the execution state. FUNC while the EXPOSURE function is running
Select MULTI / M function with the key (6),
Next, press the MODE key (7) to display the character display (16)
Display “AVERGE” and the mode name on to set the AVERGE mode (Fig. 36). Here, the EXPOSURE function mode is set to P mode from the mode display. OP
Execution is enabled by the E key (8), and the M key (1
By 4), the photometric value can be taken in.
-6 shows the controllable range at the top of the graphic display
Indicators (EV) to 6 (EV) are displayed on the LCD. In addition, the graphic display section has an index display showing the deviation width during highlight calculation and shadow calculation. The index display (“■■■■”) that indicates that it is not linked with is displayed on the left and right. 1 above the index in the middle
The point display (“■”) is the first photometric point and is normally located in the middle (0 position). When OUTPUT is displayed with the ENT key (9), the P mode of the EXPOSURE function (for example,
The shutter speed value and aperture value calculated in P ₂ mode) are displayed on the character display section (16) (No. 37)
Figure). At this time, "A" of "AVERGE" is displayed in the middle and AVERA
It shows that it is in GE mode. Next, when the M key is operated, the value of the first photometric point located one step above the index is taken in, and the one-point display (“■”) is moved one step below the index display. At the same time, the second photometric point appears one step above the index display with reference to the first photometric point (FIG. 38). At this time, the value of the first metering point taken in is in the AE locked state, and the character display section (16) is calculated in the mode selected by the EXPOSURE function (this time is the P ₂ mode). The shutter speed value and aperture value are displayed. When the M key (14) is operated again, the value of the second photometric point is taken in, the first and second photometric points move to a state of being balanced with respect to the 0 position reference, and the character display section displays the first and second values. Averaging the second photometric point value, and the shutter speed value in P ₂ mode,
The aperture value is calculated and displayed (Fig. 39). Also at this time the third
The photometric point of 1 appears above the index display. After that, by operating the M key (14) sequentially, you can capture and display the photometric values up to 8 points.
From the 9th point, it will be replaced with the 1st point, and the latest 8 photometric points can be loaded and calculated. FIG. 40 shows a state in which three photometric points are taken in, and FIG. 41 shows a state in which the highest eight photometric points are taken in. Here, if you operate the MODE key (7), the character display (16) will
The display will change from UT display to mode name display and "CENTER" will be displayed. The CENTER mode is a mode for averaging the MAX and MIN photometric values, and the graphic display section indicates the MAX and MIN values of the photometric points taken one drop below the index display with reference to the zero position. Move to a balanced position (Fig. 42). Next, press the ENT key (9) to display OUTPUT, and the shutter speed value and aperture value calculated on the character display section (16) and CENT between them.
Display "C" in ER mode (Fig. 43). Press the MODE key (7) again to switch to HIGHLIGHT mode, and the mode name display of "HIGHLIGHT" is shown on the character display. At the same time, the point display showing the MAX value of the captured metering point moves so as to come to the position of plus 2.3 Ev, and the MAX
The entire metering point display taken in is moved based on the point display showing the value (Fig. 44). At this time, minus 6E
The number of metering points that extend beyond v is displayed at the position of -6 Ev. Then press the ENT key (9) to OUTPUT
The display becomes, and the shutter speed value and aperture value calculated according to the highlight standard and "H" in HIGHLIGHT mode are displayed between them in the character display section (Fig. 45). Press the MODE key (7) again to change to SHADOW mode,
The "SHADOW" mode name display is shown in the character display area. The point display showing the MIN value of the metering points taken in at the same time moves so as to come to the position of minus 2.7 Ev, and the entire metering point display taken in moves based on the point display showing the MIN value (46th Figure). At this time, the number of metering points protruding from the plus 6Ev is displayed at the plus 6Ev position. Next, the ENT key (9) is used to switch to OUTPUT display, and the shutter speed value and aperture value calculated based on the shadow reference, and the "S" in SHADOW mode between them are displayed on the character display (Fig. 47). If you operate the MODE key (7) again and again, it will return to the AVERAGE mode again and repeat in sequence. In addition to the modes described above, the MULTI / M function has another mode. If the EXPOSURE function is in M (manual) mode, the MULTI / M function will be in MANUAL mode, and the MODE key (7) will be disabled without any other mode. MA
In the NUAL mode, the control value is the setting value in the M mode of the EXPOSURE function, which is 0 in the index display.
The position is the set value. Therefore, the photometric value from the camera is present at a position displaced by the amount of deviation from the set value as shown in FIG. The ENT key (9) changes to OUTPUT display, and the character display section (16) displays the shutter speed value and aperture value, which are the set values, and "M" between them (Fig. 50). Since it is in the execution state by the OPE key, the photometric points are taken in by the M key as in the other modes. Fig. 51 shows 1
52, two in FIG. 52, and eight in FIG. 53. In these, the character display section (16) remains unchanged from the set value and does not change. As shown in FIG. 53, the graphic display allows the photometric distribution of a certain subject to be judged at a glance. Here, the UP key (11) or COWN key (12) can be used to move the entire photometric distribution chart consisting of the photometric points taken in to the left and right. 54th
In the figure, the shutter speed value display section is underlined, so the shutter speed value is changed at the same time as the photometric distribution map moves with the UP key (11). Therefore, with this function, it becomes possible to perform exposure control according to the brightness distribution of the subject, and further 2.3Ev, 2.7Ev
You can also change the width of the highlight and shadow exposure that are fixed to. If the underline is moved to the aperture value with the cursor key, the aperture value will be changed.
In the above description, the point that is judged to be the most appropriate in the photometric distribution map is that the shutter speed value or aperture value is arbitrarily changed with the UP key (11) or the DOWN key (12) to display the index display. It is possible to move to the 0 position and set an appropriate value for the subject by one's own judgment. In other words, it can be said that the MANUAL mode of this MULTI / M function is a kind of metered manual in a generally known manner.

Next, the BRACKET function will be described. This function is for shooting with shifted exposure values based on the captured photometric data. It is possible to shoot up to 9 frames by shifting, and you can set the shift start value, shift width, and number of shots. This function is also skipped and cannot be selected if the EXPOSURE function is not in the running state. Fig. 55 shows the state of mode name display, showing that P mode is selected with the EXPOSURE function, and the index indicating the shift start value and shift amount is displayed at the top of the graphic display (24). Has been done. This indicator is MULTI
Although it is common with the one showing the photometric range of the M function, a non-common one may be provided separately. An index indicating the offset range is displayed on the graphic display portion. Moreover, the BRACKET function is in the non-execution state. Press the ENT key (9) to display OUTPU as shown in Fig. 56.
The display changes to T. The character display (16) shows the amount of deviation from the reference value and the number of remaining flames.
Further, since it is in the execution state by the OPE key (8), a display newly showing the operation state of the BRACKET function appears in the graphic display section (24) below the index in the same shift range. Then press the ADJ key (10) to set OUTPU
When the T display is changed to the INPUT display, as shown in FIG. 57, the message "FRON" first appears on the character display section (16) to set the shift start value. Here, enter the underlined number with the UP key (11)
Alternatively, when the desired value is changed by the DOWN key (12), the index and the operation display are moved as shown in FIG. 58 together with the key input. Next, press the ENT key (9) to display the message "STEP" for setting the width
Appears in 6) (Fig. 59). Shift width is 1 / 4Ev, 12Ev, 1Ev,
Selectable from 4 types of 2Ev, UP key (11) or DOWN
Use the key (12) to change and set the underlined value (Fig. 60). Then, by the ENT key (12), a message "FRAME" appears on the character display to set the number of shooting frames as shown in FIG. UP
Use the key (11) or DOWN key (12) to change and set the underlined value (9 frames this time), and on the graphic display section, the width of the indicator and the operation display will start shifting. The shift range is displayed continuously from the value to the final shift value (No. 62)
Figure). Next, by pressing the ENT key (12), the message "COMPLETED" will be displayed on the character display (16) to notify the completion of setting. If you press the ENT key (12), the display will return to "FROM" and the setting display will be repeated. Press the ADJ key (10) to change from INPUT display to OUTPUT display,
The character display (16) shows the amount of deviation from the reference value,
Display the number of remaining frames (Fig. 64). Next, when the camera is released, the photometric value at that time is locked, and the exposure value of each flame that is shifted based on that photometric value is the mode selected by the EXPOSURE function, this time the P mode (P one of the mode of _1, P _2, P ₃₎
The camera is controlled by being converted by the shutter speed value and the aperture value calculated in. FIG. 65 shows a state in which the camera is released once, and the character display (16) shows the amount of deviation from the reference value of the exposure value controlled by the next release.
The number of remaining flames is displayed. Then, the graphic display section (24) changes so as to display the range from the next control (exposure) value to the final (exposure) value in the operation display.

Figure 66 shows the camera released twice.
FIG. 67 shows a state where the camera is released eight times.
The number of remaining flames on the character display part (16) is displayed as "1" to indicate that there is one remaining frame, and the graphic display part (24) is an operation display of only the final value. Next, in order to shoot the last flame set,
When the camera is released, the character display section (16) and graphic display section (24) are reset to the initially set values, and as shown in FIG. The same display state is displayed and the camera can be controlled repeatedly. When the BRACKET function is being executed and the BRACKET function is executed by changing the external display (2) display to EXPOSURE function, EXP
When the OSURE function selects P, S, A mode,
In the graphic display, the Ev line moves in parallel on the program line, and when M mode is selected, the aperture line moves in parallel, so the BRACKET function is executed. Can be easily confirmed.

Next, the imprinting function will be described. When the imprint function is selected by operating the FUNC key (6), the mode becomes the exposure control data imprint mode,
When the OPE key (8) is operated, it becomes active. At this time, if the exposure function is selected, the diagram and Ev line at that time are displayed (Fig. 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 (70th
(Figure) This data is imprinted. On the other hand, when the exposure function is not selected, when the ENT key (9) is pressed, the data sent from the camera body (BD) is displayed as the imprinted data. In this case, graphic display is not performed.

Press MODE key (7) to enter year / month / day mode, and the mode name will be displayed on the character display (16) (71st
Figure). Next, press the ENT key (9) to display the data from the calendar microcomputer (CAMC) (Fig. 72). If shooting is performed in this state, the data of this character display section (16) is imprinted. Also, in the state shown in Fig. 72, ADJ key (1
Press (0) to change the data, and the cursor is displayed in the year data display (Fig. 73). Then, when the cursor key (13) is pressed twice, the cursor is displayed below the day data display section, and in Fig. 75, the UP key (11) is pressed three times to change the day data from 12th to 15th. is there. When the ADJ key (10) is pressed in this state, the display state shown in Fig. 75 is obtained and this data is imprinted. Note that the imprinting is performed even in the display state of FIGS. Further, if the calendar data is changed (data from the calendar microcomputer (CAMC)), the display data is also changed. Each time the MODE key (7) is pressed in this state, the imprint mode is changed in the order shown in Table 1, and the hour, minute, and second modes are also changed.
Further, when the MODE key (7) is pressed, the up count mode is set. FIG. 76 shows the mode name display state of this up-count mode. When the ENT key (9) is pressed in this state, the display state shown in FIG. 77 appears. Then, when the ADJ key (10) is pressed, a cursor appears and the data corresponding to the position of the cursor can be changed with the up key (11) and the down key (12). Up key (11) 0 → 1 → ...
… → 9 → − → Blank → 0 …… in the order of down key (1
In 2), it changes to the opposite. FIG. 79 shows a state in which the data change is thus completed. When the ENT key (9) is pressed in this state, the cursor can be moved as shown in FIG.
When shooting is performed in this state, the data incremented by "1" is sequentially printed. There is no carry to the blank digit. When the MODE key (7) is pressed in the up count mode, the down count mode is set and the mode name display shown in FIG. 81 is displayed. In the following steps, the initial data is set in the same procedure as in up-count mode, and the display at the end of setting is
It is a figure. In both of these modes, the data to be changed and imprinted at the time of shooting is displayed on the character display section (16).

When the MODE key (7) is pressed in the down count mode, the fixed data imprinting mode is set and the display state shown in FIG.
When the ENT key (9) is pressed below, the display state shown in Fig. 84 and when the ADJ key (10) is pressed is displayed as shown in Fig. 85. 86th
Change the data as shown in Fig. 87 and press the ENT key (9) to enter the state shown in Fig. 88. This mode is OP
Unless you operate E (8) or MODE key (7), the fixed data you set will be imprinted.

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 cannot be performed, and the setting state of the imprint function is maintained. When this function is selected, it is the imprinting function for monochrome film, and when the B & W function is not selected, it is the imprinting function for color film. When the B & W function is selected, the imprinting function may be invalidated so that the same operation as the imprinting function can be performed. When the B & W function is selected, the imprinting time becomes long.

Next, the INTERVAL function will be described. This function can operate the camera at certain time intervals and take pictures automatically in sequence. In the interval function, the interval time,
The number of frames at each interval shooting (hereinafter, referred to as frame number), the number of times the interval is repeated (hereinafter, referred to as group number), and the first release start time of interval shooting (hereinafter referred to as start time) can be set.

FIG. 89 shows the mode name display of the interval function. In the non-execution state, the ENT key (9) is invalid. Further, the graphic display section (24) is in a state of no display by this function. When this interval function is set to the execution state with the OPE key (8), execution is started toward the start time. Also, if you want to immediately execute the first release of the interval, you can start it by canceling the start time by putting it in the execution state with the OPE key (8) and releasing the camera. There is. Next, press the ADJ key (10) to OUT
The PUT display changes to the INPUT display, and as shown in Fig. 90, the interval time can be set first. The INTERVAL time "I" is displayed on the character display section (16), and "H (Hour), M (Minu
The letters “te), S (Second)” are displayed together with the numerical value.
In addition, the underline indicates where the value can be changed,
Use the UP key (11) or DOWN key (12) to change the value, and use the cursor key (13) to move the changed position to set the interval time (Fig. 91). The interval time is 0 seconds to 99 hours 59 minutes. It can be set up to 59 seconds.
Next, the ENT key (9) is used to change the setting display of the number of frames ("F") and the number of groups ("G") as shown in FIG. Enter the value underlined with the UP key (11) or
Use the DOWN key (12) to change, and the cursor key (13) to move the changed position to set the number of frames and groups (Fig. 93). The number of frames can be set up to a maximum of 9 frames, but when the BRACKET function is in the execution state, the number of frames in the BRACKET function has priority. The number of groups can be set up to 99 groups. Then press the ENT key (9)
As shown in Fig. 94, the display changes to the start time setting display. The start time can be set to what hours, hours, and minutes. The START time "S" is displayed on the character display (16) and "D (Da
te), H (Hour), M (Minute) ”are displayed together with the numerical value. Underlined numerical value is UP key (11)
Alternatively, use the DOWN key (12) to change the value, and use the cursor key to move the changed point and set the start time. Then ENT
By the key (9), the character display (16) changes to the "COMPLETED" display of setting completion (illustration omitted), and then ADJ
Press the key (10) to change the INPUT display to the mode name display again (Fig. 95). As a result, when the interval function is started, press the OPE key (8) to put it in the running state, and press the ENT key (9) to display the output. The start time will be displayed on the character display (16) as shown in Fig. 96. To be done. After the first release of the interval is executed, the remaining time until the next release is displayed in hours / minutes / seconds (“H, M, S”) on the character display (16) ( (Fig. 97).

FIG. 98 is a block diagram showing a specific example of the back circuit (BCKC). (CMC) is a control microcomputer, and by key input,
Functions, modes, data settings, exposure calculation, display data creation, imprint data creation, and imprint operation control. Furthermore, a display unit (SD), which will be described later,
It also controls (DD) and (CD), exchanges data with the calendar microcomputer (CAMC) and display microcomputer (DMC), and exchanges data with the camera body (BD). (CAMC) is a calendar microcomputer, which also controls calendar data for imprinting, interval control, and long exposure time (long time) control.

The switch (M) is a switch that is closed by pressing the memory key (14) in Fig. 5, and the switch (CL) is a memory
Switch that is closed by operating the clear key (15), (CU
R) is a switch that is closed by operating the cursor key (13), (ENT) is a switch that is closed by operating the enter key (9), and (UP) is a switch that is closed by operating the up key (11). The switch (DWN) is a switch that is closed by operating the down key (12). These six switches are connected to each input port of the control microcomputer (CMC) and also connected to the interrupt terminal (INTB) via the AND circuit (AG). Therefore, even if the control microcomputer (CMC) stops operating, the control microcomputer (CMC) starts operating when any switch is turned "ON". In addition, the switch (OPE) is a switch that is closed by operating the operation key (8), (FUN) is a switch that is closed by operating the function key (6), and (ADJ).
Is a switch that is closed in conjunction with the adjust key (10), and (MOD) is a switch that is closed in conjunction with the operation of the mode key (7). Since these four switches are connected only to the input port of the control microcomputer (CMC), the control microcomputer (CMC) will not be activated even if these switches are turned "ON".

Next, the operation of the control microcomputer (CMC) will be described based on the flowchart of the control microcomputer (CMC) shown in FIG. The signal line (CSB) from the camera body (BD) is still "Low"
When it falls to, operation starts from the No. 0 step by the interrupt pin (INTA). First, since the camera was started, set the signal line (BS ₁ ) to "High", and then the interrupt pin (INT
Enables interrupt operation by A), then camera body (BD)
From which timing the interrupt signal is input. That is, in the step of No. 2, it is determined whether or not it is in the state of waiting for data input, and if it is in the state of waiting for data input, whether the imprinting data (Tv, Av) has been input, or whether the calculation data has been input is No. Determine in step 3.3. This is because the signal line (BIO) is "H" when the signal line (CSB) falls to "Low" and it is the data for calculation as described above.
If it is imprinted data, it can be identified because it is “Low”. When it is determined that the imprinted data is input, the sent data is read and No. 5 If it is determined in step No. 5 that the copy function is not selected, the copy operation is not performed and the process proceeds to step No. 15. On the other hand, if the copy function is selected, the process moves to step No. 6 and sends the data corresponding to the selected copy mode to the LED drive circuit (LDR) for the copy. A sync signal is sent to the signal line (CSLD) to sequentially send data in units of 4 bits.
When EN) is set to "Low" and the display operation of the drive circuit (LDR) is operated, the light emitting diode (LED) of the segment is dynamically driven according to the image data and the image is captured. Then, the control microcomputer (CMC) counts the time according to the film sensitivity read from the camera body. In the B & W function, a different (long) time is counted even if the read film sensitivity is the same data as the imprint function. Then, when the counting ends, the signal line (LDEN) is set to “Hi
gh "to stop the capturing operation by the drive circuit (LDR). When the trailing curtain starts running on the camera body (BD), a" Low "pulse is output to the signal line (CSB). Therefore, at this time as well, the interrupt signal is input to the interrupt terminal (INTA), and since it is not waiting for data input at this time, No. 11
Go to step. Then, if it is determined in step Mo.11 that the copying operation is in progress, the process moves to step No.10, and the signal line (LDEN) is set to "High" to forcibly stop the copying operation. . This prohibits the copying operation from being performed during film winding. No.15
In step, the switch (SCN) on the camera body is turned “ON”.
Determine whether or not. If the switch (SCN) is "ON", the operations of steps No. 16 to 21 are not performed and No. 40
Go to step. On the other hand, the switch (SCN) is "OF".
If it is F ", then it is determined whether or not it is the count-up mode. Then, if it is the count-up mode," 1 "is added to the register CR in which the imprint data is set, and the process proceeds to No. 40. , If it is not the count-up mode, then it is determined whether it is the count-down mode or not, and if it is the count-down mode, "1" is subtracted from the content of the register CR and the process shifts to No.40.
If it is not the countdown mode, then it is determined whether it is the bracket function or not, and if it is the bracket function, subtract “1” from the register BR in which the number of bracket function frames is set, and proceed to the No. 40 step.
If it is not a bracket function, proceed directly to step No.40. The data is imprinted even when the switch (SCN) is "ON".
The determination of the switch (SCN) may be provided between No. 4 and No. 5 steps, and if the switch (SCN) is "ON", the process may immediately proceed to No. 40 step.

In the step of No.3, it is not the imprint data (signal line (BI
If it is determined that O) is "High"), the process proceeds to No. 25 and the data is read from the camera body.
And when the exposure function is selected
Go to step No. 27, and signal line (BIO) is "Low"
Wait for And the signal line (BIO) is "Low"
Then, the back ICP (“80H”) is output. The camera body (BD) receives the signal line (BI
O) is set to "High", the signal line (CSB) remains "Low" and waits for the control microcomputer (CMC) to perform an operation.
The signal line (BIO) is set to “Low” when a sufficient time has passed for the calculation. In the control microcomputer (CMC),
In step No. 28, the back ICP is output and the exposure calculation subroutine is executed. When the calculation operation ends, wait for the signal line (BIO) to go to "Low", and when it goes to "Low", the above-mentioned control data (Tv, Av), exposure control mode, out-of-interlocking data, release enable / disable data, etc. To move to step No.40.

A pulse is input when the control microcomputer (CMC) is activated by the pulse output to the signal line (CSB) when the camera body (BD) starts operating, or when the trailing curtain starts running. At this time, when it is not the imprint function or when the imprint operation is completed, the process immediately shifts to step No. 40. Switch (M),
(CL), (CUR), (ENT), (UP), (DWN) are turned on and an interrupt signal is input to the interrupt terminal (INTB), or an interrupt is generated by the interrupt terminal (INTA). When the operation by is completed, No.40
Start the operation from step. In step No.40, the timer TIR (for operating time count) register TIR is reset, and the flag IOF that determines whether data is input or output from the calendar microcomputer (CAMC) is set to "1".
Go to step o.42. In the step of No.42, it is determined whether the flag IOF is "0". If it is "1", the data from the calendar microcomputer (CAMC) is read and the flag IOF is reset to "0". Transition. On the other hand, if it is determined in step No.42 that the flag IOF is "1", the data is sent to the calendar microcomputer (CAMC), the flag IOF is set to "1", and the process proceeds to step No.47. To do. The method of data transmission / reception is to set the signal line (CSCA) to “Low”, and when outputting data, the signal line (I / I
O) is “Low”, and the signal line (I
/ O) to "High". When the signal line (CSCA) goes "Low", the calendar microcomputer (CAMC) is interrupted, and the calendar microcomputer (CAMC) outputs a pulse for data transfer synchronization. In synchronization with this pulse, 4-bit data is sequentially transmitted and received via the data bus (DBUSI). The data sent from the calendar microcomputer (CAMC) to the control microcomputer (CMC) is the current year, month, day, hour, minute, second and time until the start of the next shooting operation for interval shooting,
Minutes, seconds, and whether interval shooting is active,
There is data indicating whether or not the interval shooting is finished. Therefore, the control microcomputer (CMC) creates the imprinting data based on these data, and also creates the remaining time display data until the start of the next shooting operation at the time of the interval function, and also inputs the interval end signal. If it does, the interval function is canceled. In addition, the data sent from the control microcomputer (CMC) to the calendar microcomputer (CAMC) is the start date, hour, minute of the interval shooting, hour, minute indicating the interval shooting interval,
Seconds, number of groups for intervanic shooting, number of frames for interval shooting, set exposure time in M / LT mode, whether interval function is selected, M / LT
There is data such as whether the mode is selected.

In the step of No. 47, the states of the switches (M) to (MOD) are discriminated and it is discriminated whether or not the key operation is performed. If there is no key operation, immediately N
Go to step o.50. On the other hand, if the key operation is performed, the operation according to the state of the switches (M) to (MOD) and the state of the control microcomputer at that time is performed.
In step, set the signal line (BS ₁ ) to "Low" to start the camera body and move to step No.50. This No.48
This subroutine is shown in FIGS. 103 and 104, and the specific operation is omitted because the relationship between the operation of each key and the setting data and display has already been described.

When the No. 48 step subroutine and the No. 49 step operation are completed, the interrupt signal can be accepted to the interrupt terminal (INTA) and the display data is sent to the display microcomputer (DMC). In this operation, first, the signal line (DEN) is set to "Low" to activate the display units (SD), (DD), (CD), then the signal line (CSDM) is set to "Low", and the display microcomputer ( DM
The data is output to C) and the signal line (D
Synchronous pulse is output from CK ₂ ) and data is sent in 4-bit units. The data sent according to each function and mode and the display will be described later based on the operation of the display microcomputer (DMC). In the figure, the enable terminal is used, but when the signal line (DEN) becomes "Low", power is supplied to the display sections (SD), (CD), (DD). There is.

When the data transfer is completed, determine whether any of the switches (M) to (MOD) is "ON" in the step of No.52, and if it is "ON", reset the register TIR. If none of the switches are "ON", add "1" to the contents of the register TIR and move to the step of No.55. Then, in the step of No. 55, it is judged whether or not the content of the register TIR has reached the constant value "K", and if it has not reached "K", the process proceeds to the step of No. 42 and the same operation is repeated. If it is determined in step No. 55 that the content of the register TIR has reached “K”, it means that a certain time has passed since no key operation or data exchange with the camera body (BD) was performed. At this time, the signal line (DEN) is set to "High" to stop the operation of the display unit, enable the operation by the interrupt signal to the interrupt terminal (INTB), and stop the operation.

FIG. 100 is a flowchart showing a specific example of the calculation subroutine of No. 29 in FIG. 99. First, it is determined whether or not the bracket function 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 operation is being performed. Set. Then, after resetting or setting the A flag, the Ev value is calculated from the data from the camera body (BD). On the other hand, if the bracket function is in operation, the Ev value obtained when the operation is started is not changed, and therefore the operation proceeds to bracket operation.

When the current Ev value is obtained, it is next determined whether or not the data from the meter (MET) has been fetched, and if it has been fetched, the external function is used, and the data from the meter (MET) is used as the control value. When the control limit is exceeded, the limit value is used as the control value, as in the calculation in the camera body (BD). If there is no data from the meter (MET), then M
Alternatively, it is determined whether or not the mode is the M / LT mode, and if it is in this mode, the manually set Tv and Av are output. On the other hand, M, M
If it is not in / LT mode, determine whether the next multifunction is selected. If multifunction is selected, control is performed based on the stored Ev value.
Calculate the Ev value.

This multi-function calculation subroutine is
It is shown in Figure 102. In the center mode, the maximum Evmax and the minimum Evmin are obtained from the stored Ev values, and (Evmax + Evmin) / 2 is calculated from these two values to obtain the control Ev. If it is not the center, it is judged whether it is the highlight mode or not, and if it is the highlight mode, the maximum value of the stored Ev is calculated by Evmax−2.3 to calculate the control Ev. If it is not the highlight mode, then it is determined whether or not it is the shadow mode. If it is the shadow mode, the minimum value Evmin of the stored Ev is calculated by Evmin + 2.7 to calculate the control Ev. If it's not shadow mode, it's average mode. Is calculated 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, calculation is performed according to the selected mode among the P ₁ , P ₂ , P ₃ , A and S modes. A concrete example of this arithmetic subroutine is shown in FIG. In this calculation, when Evmax (= Tvmax + Avmax) <Ev, Evmin (= Tvmin + Avmin)> Ev, the limit value is set as the control value because it is outside the control interlock, and the control returns to the main routine. On the other hand, when the operation is in the interlocking operation, the operation according to the sequence shown in the flowchart is performed to calculate the control value, the out-of-interlocking 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 set as the set value, and then
The set value is changed by recalculating from Ev and the limit value.
In the program mode, the limit aperture value can be set (not the maximum aperture value or the maximum aperture value).

When the control Tv and Av are obtained, it is determined whether the flag A is set to "1". If it is set to "1", the bracket function is selected and the operation is not performed. The operation shifts to. Also, during the bracket function operation, the process proceeds to the bracket calculation for the next shooting. First, determine whether it is M, M / LT mode, and if it is M, M / LT mode, move the aperture value by the number of frames of the shift amount (the number of next shots),
Reset the A flag.

_{Meanwhile, P 1, P 2, P} 3, A, moves the Ev by the number of frames of the shift amount in the S mode, the process proceeds to reset the A flag Tv, the calculation subroutine Av. In this way, Tv, Av
When is calculated, the bracket function is next selected, shooting for the set number of frames is completed, and it is determined whether the signal line (BS ₂ ) is “Low”. And if it is "Low", in order to prevent shooting operation,
The release disable signal is set, and if the above conditions are not satisfied, the release disable signal is reset and the process returns to the main routine.

FIG. 105 is a flow chart showing the operation of the calendar microcomputer (CAMC). First, when the signal line (IP) of the camera body (BD) is set to "Low" at the start of the exposure control operation, the interrupt operation by the interrupt terminal (INTA) starts. Then, in step ST1, tile interruption (interruption every 1 sec) is enabled, and the process proceeds to ST2. In step ST2, switch (SC
N) is "ON", and if it is "ON", the interval and M / LT operations are not performed and step ST
Move to 20. On the other hand, if the switch (SCN) is "OFF",
Whether it is interval shooting or not is determined. If it is not interval shooting, then it is determined whether or not it is M / LT mode. And
In the M / LT mode, set the signal line (BS ₂ ) to “Low” and set M / L
If it is not the T mode, the process directly proceeds to step ST20.

If it is determined in step ST3 that interval shooting is in progress, the remaining time until the start of interval shooting is reset and the signal line (BS ₂ ) is set to "Low". Then, "1" is subtracted from the register IFR in which the number of frames is set, and if the content of the register IFR is not "0", the process proceeds to step ST20. On the other hand, if the content of the register IFR is "0", then "1" is subtracted from the register IGR in which the number of groups is set, and it is determined whether or not it is "0". If it is "0", the interval end signal is set, and if it is not "0", the remaining time is set. Then, it is determined whether or not the M / LT mode is set, and if it is not the M / LT mode, the signal line (BS ₂ ) is set to “High”, and if it is the M / LT mode, the signal line (BS ₂ ) is set to “Low”. Then, the process proceeds to step ST20. And the interrupt terminal (INTA), (INT
It is possible to interrupt B) and determine whether the flag TIF is "1". If the flag TIF is "1", it means that a timer interrupt has occurred during this operation, the TIF is reset to "0", and the operation proceeds from step ST45. Meanwhile, the flag TI
If F is “0”, stop the operation.

Calendar microcomputer (CAMC) when the control microcomputer (CMC) sets the signal line (CSCA) to "Low" for data transfer.
Operates with the interrupt pin (INTB) from ST25. ST
25 enables timer interrupts, then the signal line (I /
Determine whether to output or input data by determining the state of O). If it is data input, the data from the control microcomputer (CMC) is read in step ST27. If M / LT mode is selected and M / LT mode is not in operation, exposure time data is set, and if M / LT mode is not selected or counting is in M / LT mode, ST30 remains as it is.
Go to step. In step ST30, it is determined whether the interval function has been selected and is in the operating state. Then, if the interval function is not selected or is operating, the process directly proceeds to step ST20. On the other hand, if the interval function is selected and the operation has not started, set the number of frames in the register IFR, the number of groups in IGR, the time interval between groups (remaining time), and the start time, and then proceed to step ST20. Transition. When it is determined in ST26 that the data is output, the above-mentioned data is sent to the control microcomputer (CMC) and the process proceeds to ST20.

When the timer is interrupted every 1 second, the operation from step ST40 is started, and if the interrupt pin (INTA), (INTB) is in operation, set the flag TIF to "1" and go to the operation flow up to that point. Return. On the other hand, if such an operation is not performed or the operation by (INTA) and (INTB) is completed, the operation from step ST45 is performed. In step ST45, the rewriting operation of the calendar is performed in increments of 1 second. Then, it is determined whether or not the M / LT mode is operating, and if it is operating, the set second (Tv timer) changes to "1".
Is subtracted and it is determined whether the Tv timer has become "0". If it does not become "0", the process directly shifts to the step of ST62, interrupts by (INTA), (INTB) and the timer are enabled, and the operation is stopped. On the other hand, the content of Tv timer at step ST48 is "0" to start traveling of the rear curtain in the camera body (BD) as a "High" to be long as the signal line (BS ₂₎ becomes, the processing proceeds to step ST62.

When it is determined in step ST46 that the M / LT mode is not in operation, it is next determined whether or not the interval shooting operation is performed. Then, if it is not interval shooting, the signal line (BS ₂ ) is set to “High” and the process proceeds to step ST62. In this case, the operation key (8) may be operated during the operation of the M / LT mode and the interval function to bring the operation into the in-operation (stop operation) state. In this case, the signal line (BS ₂ ) is set to “High” to stop the M / LT and the interval, and the exposure control operation of the camera is stopped.

When it is determined in step ST55 that the interval function is selected, the process proceeds to step ST56, and it is determined whether one minute before the start of one group shooting, and 1
If it is a minute before, a "Low" pulse is output to the signal line (BS ₁ ) to activate the camera body (BD), and the flash unit (F
Start the boost operation of L). And in this case, the signal line (BS ₂₎ proceeds to ST62 step calculates the time until the start since the output "High". On the other hand, if it is determined in step ST56 that it is not 1 minute before, it is determined whether or not it is the start time for shooting one group, and if the start time is reached, the signal line (BS ₂ ) is set to “Low”. "To move to step ST62.
On the other hand, before or after the start, it is determined whether "Low" is being output to the signal line (BS ₂ ) next,
If "Low" is output, the shooting operation for one group is in progress, and the process immediately moves to step ST62. On the other hand, if “High” is output to the signal line (BS ₂ ), it means that the shooting operation of interval shooting is started or between groups, and at this time, the remaining time until start is calculated.
Move to step ST62.

Next, we will explain the graphic display block consisting of the display microcomputer (DMC), LCD segment driver (SD), LCD common driver (CD), LCD drive reference power supply (DD), and liquid crystal display (LCD). To do. First, the data (4 bits) shown in Table 2 is transferred from the control microcomputer (CMC) to the display microcomputer (DMC) via the data bus (DBUS2) based on the transfer clock (DCK2), and the graphic is displayed on the display microcomputer (DMC). Converted to display data and serially transferred to the LCD segment driver (SD). LCD segment driver (SD) is RAM for LCD display
1-bit data of the LCD display RAM corresponds to lighting or non-lighting of one dot of the liquid crystal display (LCD). The graphic display data is transferred to the LCD segment driver (SD) and then stored in the LCD display RAM. The LCD segment drive signal (SGT) corresponding to the contents of the LCD display RAM is sent from the LCD segment driver (SD). It is given to the liquid crystal display (LCD). The LCD common driver (CD) uses the internal oscillator to generate the timing signals necessary for display.
LCD common scan signal (CMT) that automatically scans the common signal of the liquid crystal display (LCD) according to the display duty.
Is output to the liquid crystal display (LCD). The LCD segment drive signal (SGT) and the LCD common scan signal (CMT) are synchronized by the synchronization signal (HS) supplied from the LCD common driver (CD) to the LCD segment driver (SD). The liquid crystal display (LCD) displays these two signals, the LCD
Segment drive signal (SGT) and LCD common scan signal (CM
T) for dot matrix graphic display. The reference power supply (DD) for LCD drive is the liquid crystal display (LC
Stable power supply (VDP) to drive D) LCD segment driver (SD) and LCD common driver (CD)
Is being supplied to.

The above is the data from the control microcomputer (CMC)
The outline of the operation until the graphic pattern is displayed on the liquid crystal display (LCD) will be described in more detail below with reference to the flow chart of the display microcomputer (DMC).

First, the signal line (DEN) from the control microcomputer (CMC) to the display microcomputer (DMC) starts the operation of the display microcomputer (DMC) (power supply is started) and the reset routine shown in FIG. 106. Start (step). LCD segment driver (S
D) is initialized and the liquid crystal display (LCD) is turned off (all lights off). In step, it is judged whether it is in the all-lighting mode, and normally, the step is in the waiting state for interruption. The judgment of whether or not this is the full lighting mode is for a disconnection test at the factory. In the full lighting mode, all lighting data is output to the LCD segment driver (SD) (step), and the liquid crystal display (LCD) ) Lights, and stops the system clock in step. In the normal state, that is, in the all-lighting mode, the step wait state is entered and the control microcomputer (CMC) waits for an interrupt. The imprint routine shown in FIG. 107 is a routine for setting a flag for displaying an imprinting display (“IMP”) for a certain time during imprinting. Imprint signal from camera (I
P) to start (step), save the register in step, set the "IMP" display flag in step, and restore the register in step to restore the original main routine.

Fig. 108 The main routine starts (step) by the signal (CSDM) from the control microcomputer (CMC) to the display microcomputer (DMC), and the display microcomputer (DMC) at the step
Until all the processes within are completed, restart of the main routine is prohibited, the transfer data from the control microcomputer (CMC) shown in Table 2 is input in step, the power supply voltage is checked in step, and if the power supply voltage When is less than or equal to the predetermined value, the power supply voltage check flag (BC flag) is set in step. From step to step, the transfer data from the control microcomputer (CMC) is decoded into graphic display data.

This decoding is first performed on the character display section (16) (step), and the mode name display, INPUT display, O
Converted to graphic display data corresponding to each display contents such as UTPUT display, this data is output to the LCD segment driver (SD) and written to the LCD display RAM in this LCD segment driver (SD) ( Step). Subsequently, the index indicating the control range and the mode display section (18) are decoded in step and output to the LCD segment driver (SD) (step).

Next, the index (22) indicating the shutter speed value, the index (23) indicating the aperture value, and the symbol (21) indicating that each function is in the execution state are decoded into graphic display data (step). In the step, the BC flag determined in the step is tested, and if the BC flag is set, the battery check display (BC display) is displayed on the graphic display section (24) (step). If the BC flag is not set,
Depending on which function is selected in the external display, the operation according to that function is performed in steps, and the index (20) indicating this function itself is decoded (step), and these graphic display data are displayed. Output to LCD segment driver (SD) in step. Here, the calculation according to the function of the step will be described in detail.

If the exposure function is selected first,
To draw the Ev line (25), the appropriate aperture value for each shutter speed value is obtained while sequentially changing the shutter speed value. Then, set line (26) according to the exposure mode (P ₁ , P ₂ , P ₃ , S, A, M, M / LT)
Is drawn by the procedure from FIG. 109 to FIG. 114. P _1, P _2, if P ₃ mode is selected, the lens minimum diameter aperture Avmax of the 109th view, lens open aperture value Avmin, lens small aperture side of the set limit value Avn, the open aperture Assuming that the setting limit value Avm on the side is Avm and the selected slope Avp, Avy is drawn while changing Tvx in the procedure shown in FIG. To briefly explain, first set Tvx = -0.5 in the step,
Draw a line segment in steps, and then draw a line segment ~ while incrementing Tvx (step ~). Finally draw a line with Tvx = Tvmax (step). P ₁ ,
The setting line in the P ₂ and P ₃ modes, the calculation of FIG. 6- (26) is as above, but the Avp line in the P ₁ and P ₃ modes, the 109th line
The slope of the figure-segments is 2: 1 and 1: 2, so if you draw it in the same way as in the P ₂ mode, the slope will be stepwise and difficult to understand. Therefore, in the P ₁ and P ₃ modes, this point is devised so that the points (Tvx, Tvy) obtained by the calculation are arranged in a straight line (see FIGS. 6 and 8). FIG. 111 shows how to draw the setting line in S mode, and Tvn is the setting shutter speed. Draw a line (line segment) of Avy = Avmin while incrementing Tvx in steps, and then Tvx = Tvn
Draw the line (line segment), draw the line segment with Tvx = Tvn (step), and finally draw the line (line segment) with Avy = Avmax while incrementing Tvx again. Fig. 112 shows how to draw the setting line in A mode.
Is a set aperture value. Set Tvx = -0.5 in step ~, draw a line segment, increment the Tvx in step, and set the line (line segment) of Avy = Avn in step
Set Tvx = Tvmax and draw each line segment. Fig. 113 shows how to draw the setting line in M mode. In step, increment the Tvx and set the line (line segment) of Avy = Avn, and in the step set Tvx = Tvn to Avy.
Draw a line (line segment) from = Avmin to Avy = avmax. Here, Avn and Tvn are the set aperture value and the set shutter speed value, respectively.

Fig. 114 shows how to draw the setting line in M / LT mode. In step ~, set Tvx = -0.5, Avy = Avmin to Avy = A.
Draw the line (line segment) up to vmax while incrementing Tvx in steps, and draw the line (line segment) for Avy = Avn. Also, the setting line for M / LT mode can be drawn in the same procedure as for M mode. The above is the calculation method of the graphic display unit in the exposure function.

Next, the calculation of the graphic display unit when the multifunction is selected in the external display will be described. At this time, the index from -6 to +6 (hereinafter, abbreviated as ΔEvx) indicating the range from the control has already been decoded so that the liquid crystal display (LCD) lights up in step 108 in FIG. Index indicating the value (2
2), the index (23) indicating the aperture value is decoded so that it goes out. Ev values that are automatically controlled in Table 4 are Ev
c, Ev ₀ currently being measured is Ev ₀ , and the number of stored data is n, the point P ₀ (ΔE
v ₀ , yo) and then the line L ₀ (step). Point Pn (ΔEv stored in step
n, ym) is plotted. However, 1≤n≤8, 2≤m≤9. This situation is shown in the flow chart in FIG. The above is the calculation method of the graphic display unit in the multi-function.

Next, the calculation of the graphic display unit when the bracket function is selected in the external display will be described. Index indicating deviation from proper exposure -6 to +6
In the same manner as the multi-function, in the step shown in FIG. 108, is decoded so that the liquid crystal display (LCD) is turned on. Assuming that the current point is ΔEvCONT and the setting start point is ΔEvSET in Table 4, ΔEvmax is reached in step in FIG. 116.
Then, in steps, from ΔEvx = ΔEvSET to ΔEvx = ΔEvm
Draw a line (LSET) up to ax, and in steps ΔEvx ＝
Draw a line (LCONT) from ΔEvCONT to ΔEvx = ΔEvmax. The above is the calculation method of the bracket function graphic display unit.

As described above, when the calculation of the graphic display section is completed, the process proceeds to step in FIG. 108, and the symbol (20) indicating which function is selected in the external display.
Is decoded and is output to the LCD segment driver (SD) in step together with the decoding result in step and the calculation result in step. In steps,
Test the "IMP" flag indicating that imprinting is in progress, and if set, decode "IMP" into the subcharacters, and
Output to D segment driver (SD).

In this way, when all 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) process 1 End the loop. After that, the interrupt signal (C
When the interrupt signal (CSDM) is sent again, the display microcomputer (DMC) starts the main routine again, and from the above steps, the processing for the next graphic display is started. That is why.

As described above, according to the data sent from the control microcomputer (CMC) to the display microcomputer (DMC), the liquid crystal display (LC
Graphic pattern is displayed in D).

In the back circuit (BCKC) of FIG. 98, the calendar microcomputer is supplied with power from two 3-volt power supply batteries (B), and the control and display microcomputers (CMC) and (DMC) are supplied with four. Power is supplied from the 6-volt power supply battery (A). Then, the battery check is performed by the display microcomputer (DMC) (in the step of FIG. 108, the power supply batteries of both (A) and (B) are checked. If the power supply battery of (A) is not good, As shown in FIG. 117, the symbol (A) and four batteries are displayed on the graphic display (24), and when the power source battery in (B) is useless, the symbols (B) and 2 are displayed as shown in FIG. 118. Two batteries are displayed.

The following describes how to draw a tilted line (Pv. 109, Avp) in P ₁ mode. The shutter speed value: aperture value = 1: 2
There are three possible ways (a), (b), and (c) as shown in FIG. That is, in this embodiment, a liquid crystal display (LCD)
Since the minimum display step of is 0.5Ev steps in both shutter speed direction and aperture direction, if points are always displayed every 0.5Ev step of aperture value, the 11th
It can be displayed in Fig. 9 (a) or (b). The difference between FIG. 119 (a) and FIG. 119 (b) is due to the way the shutter speed value and aperture value are rounded during display. If it is displayed in this way, the shutter speed value: aperture value slope 1: 2 in P ₁ mode is extremely clear. Therefore, in this embodiment, as shown in FIG. 119 (c), only the points for each 1 Ev step of the aperture value are displayed, and no points are displayed during that time. This reveals the slope of the aperture value with respect to the shutter speed value. For exactly the same reason, the display shown in FIG. 8 is also used in the P ₃ mode.

Next, how to draw the Ev line (25) will be explained. In this embodiment, the display range of the liquid crystal display (LCD) is set to
The speed value is Tv ≦ 11 and the aperture value is Av ≧ 0.5, but Tv ≦
-0.5 and Av ≥ 9.5 are both indicators It is not accurate because it represents in. So the Ev line is Tv
Not displayed when ≤-0.5 and Av ≥9.5 11 ≥ Tv ≥ 0, 0.5 ≤ A
It is displayed only in the range of v <9.5. However, the setting line (26) is displayed within the range of Rv ≦ 11, Av ≧ 0.5. By doing this, the control point, which is the intersection of the setting line (26) and the Ev line (25), is the shutter speed value 11
Only the accurate range of ≧ Tv ≧ 0 and aperture value 0.5 ≦ Av ≦ 9.5 is displayed. Figure 120 shows how to draw the Ev line. In this figure, first, Tvx = 0 (1 sec) is initially set in step, and Avy = Ev−Tvx is obtained in step. However
Ev is an Ev value controlled automatically by data Nos. 14 to 15 in Table 2 and is a value sent from the control microcomputer (CMC).
In the step, it is determined whether 0.5 ≦ Avy <9.5 (1.2 ≦ F <27), and if it is within this range, the point (Tvx, Avy) is plotted (step), and if it is outside the range, it is not plotted. In the step, Tvx is incremented by 1 Ev step, and in the step, Tvx> Tvmax (Tv = 11) is determined. If NO, the process returns to the step and the following steps are repeated. When YES, that is, Tv> Tvmax, the process proceeds to step and ends. The step of incrementing Tvx may be 0.5 Ev step.

In Fig. 1, the control microcomputer (BM) of the camera body (BD)
C) is connected to all the remaining circuits (flash device (FL), flash device (FL), through serial input / output terminals (SOU), (SIN), (SCK).
Receiver (REC), display (DSP), lens circuit (LE
C), AF circuit (AFC), back circuit (BCKC), A-D, D-
Data is exchanged with the A conversion circuit (ADA). Therefore, by monitoring this serial input / output terminal while operating this system and checking the data read by monitoring and comparing it with the operation of the camera system, it can be determined whether the system is operating normally or not. You can check. Therefore, these serial input / output terminals (SOU), (SIN), (SC
K) is exposed from the camera body (BD) to the back circuit (BCKC) terminals (T ₁ ), (T ₂ ), (T ₃ ), and the lens circuit (LEC) terminals ( There are T ₁₁ ), (T ₁₂ ), and (T ₁₃ ). And it is the terminals (T1), (T2), (T3) for the back circuit (BCKC) that have all the terminals.
The checker should be installed at the position of the back circuit (BCKC). Then, from the checker side, the microcomputer (BMC) outputs a "Low" signal having a lower impedance than the "High" signal output to the signal line (CSB) to force the signal line (CSB) to " If set to "Low", the gate circuit (G ₂ ) will always be in the active state, so data exchange with the circuits other than the back circuit (BCKC) can be checked. Also, the back circuit (BCKC) can be checked to some extent by the terminals (T ₁₂ ) and (T ₁₃ ) for the range circuit (LEC).

Effect As described above, according to the present invention, means for outputting a signal indicating whether or not the loaded film has been wound up to the position of the first frame shooting is provided, and the recording numerical value can be changed according to the signal. Since it is decided whether to allow or prohibit the increase or the phenomenon, the increase or decrease of the recording numerical value is automatically stopped during the so-called initial loading of the film.

Therefore, the troublesome operation of turning off the switch only during the initial load period is unnecessary, and the operability is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing the whole camera system to which the present invention is applied, FIGS. 2 and 3 are flowcharts showing the operation of the microcomputer (BMC) of the camera body (BD), and FIGS. 4 and 5 are back views. (BCK) external view, FIGS. 6 to 8 are diagrams showing display examples on the display unit (2), and FIGS. 9 to 35 are diagrams showing the relationship between key operation and display in the exposure function,
36 to 54 are diagrams showing the relationship between key operation and display in the multi-function, and Figs. 55 to 68 are diagrams showing relationship between key operation and shooting operation in the bracket function and display, from Fig. 69. FIG. 88 is a diagram showing the relationship between key operations and displays in the imprint function, and FIGS. 89 to 97.
The figure shows the relationship between key operation and shooting operation in the interval function and the display. Figure 98 shows the back circuit (BCK
Fig. 99 to 104 are flowcharts showing the operation of the control microcomputer (CMC), Fig. 105 is a flowchart showing the operation of the calendar microcomputer (CAMC), and Figs. 106 to 108. Is a flowchart showing the operation of the display microcomputer (DMC), FIGS. 109 and 110 are diagrams showing the display method of the program line in the P mode, and FIGS. 111 to 114 are S, A, M, M / LT. Fig. 115 shows the display method of the program line in the mode, Fig. 115 shows the display method with the multi-function, Fig. 116 shows the display method with the bracket function, Fig. 117, Fig. 118 show the power supply battery FIG. 119 is a diagram showing a display example at the time of lowering, FIG. 119 is a diagram showing a display example in the P ₁ mode, and FIG. 120 is a flowchart showing a display method of the Ev line. No.48: Memory means, No.16 to No.19: Change means, No.5 to No.1
0, LDR, LED: image capturing means, SCN: signal output means, No. 15: control means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Nakai, 2-30 Azuchi-cho, Higashi-ku, Osaka, Osaka Prefecture Osaka Osaka Building Minolta Camera Co., Ltd. (72) Takanobu Tamaki, 2 Azuchi-cho, Higashi-ku, Osaka, Osaka 30-chome Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Nobuyuki Taniguchi 2-30-30 Azuchi-cho, Higashi-ku, Osaka-shi, Osaka Office Osaka University Building Minolta Camera Co., Ltd. Hiroo Obara (56) References Special Kai 59-170828 (JP, A) JP 58-24134 (JP, A) JP 54-13324 (JP, A) JP 56-95235 (JP, A) Actual break 58-113030 ( JP, U)

Claims (1)

[Claims] 1. Storage means for storing numerical values initialized by manual operation, changing means for increasing or decreasing the stored numerical values by a constant value each time a recording command signal is generated, and the changing means sequentially. Recording means for recording the changing numerical value of the memory means on the film in response to the generation of the recording command signal, and whether the loaded film has been wound up to a predetermined position for performing the first frame photographing. Signal output means for outputting the signal indicating that the film is wound up to the predetermined position, and until the signal indicating that the film has been wound up to the predetermined position, the operation of the changing means and the recording means is prohibited, A data recording device for a camera, comprising: a changing means and a control means for permitting the operation of the recording means after a signal indicating that the film has been wound up to a position is output.