JPH09274210A - Imaging device and imaging system - Google Patents

Abstract

(57) Abstract: An imaging apparatus and an imaging system that do not need to be provided with an extra signal line for a communicable accessory and need not be provided with an MCU for communicating with an incommunicable accessory. . A first accessory (30) attached to an imaging device (1) can be externally operated, and a first operation member (37) that generates an electric output according to the operation and a second accessory (20). ) Is a second operating member (27) that is externally operable and generates an electric output in response to the operation, and a data creating unit (21) that creates data based on the electric output generated by the second operating member, When the discriminating means (10, S2) for discriminating the accessory mounted on the imaging device and the discriminating means discriminating the mounting of the first accessory, the electric output generated by the first operating member is received, and the discriminating means performs the second operation. It has a receiving means (10) for receiving the data created by the data creating means when the attachment of the accessory is determined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup apparatus and an image pickup system to which an accessory having an operation member can be attached.

[0002]

2. Description of the Related Art In a camera system in which a camera body and a detachable back cover that does not communicate with the main body are combined, when an operation member is provided on the back cover, the operation member is connected to a microcomputer of the camera body through a contact. The microcomputer read the operation of the operation member.

[0003]

However, in a camera system in which a camera body and a data bag for communicating with the body are combined, an operation member for performing an operation equivalent to that of the camera body is provided on the back cover. However, the camera body must be provided with a contact for communication and a contact for the operation member, and there is a problem that the number of contacts is large. In order to avoid this, if the contact of the operation member is abolished and the back cover can communicate with the camera body, the back cover must also be equipped with a microcomputer, and even if the number of contacts decreases, the cost will increase. There was a problem that led to.

The present invention has been made in view of the above problems. It is not necessary to provide an extra signal line for a communicable accessory, and it is necessary to provide an MCU for communicating to an incommunicable accessory. An object of the present invention is to provide a non-imaging device and an imaging system.

[0005]

In order to achieve this object, a first invention comprises an image pickup device (1) and a first accessory (30) or a second accessory (20) attached to the image pickup device. In the imaging system, the first accessory is externally operable and has a first operation member (37) that generates an electric output according to the operation, and the second accessory is externally operable and operated. And a data creating unit (21) for creating data based on the electrical output generated by the second operating member. Discriminating means (10, S2) for discriminating mounted accessories
Then, when the determining means determines that the first accessory is attached,
And a receiving means (10) for receiving the data produced by the data producing means when the discriminating means discriminates the mounting of the second accessory by receiving the electric output generated by the first operating member.

A second aspect of the invention is a first accessory (30) which is externally operable and has a first operating member (37) which generates an electric output in response to the operation, and is externally operable.
A second operating member (27) that generates an electric output in response to an operation
And a second accessory (20) provided with a data creating means (21) for creating data based on the electrical output generated by the second operating member. Then, when the discriminating means (10, S2) for discriminating the accessory mounted on the imaging device and the discriminating means discriminating the mounting of the first accessory, the discriminating means receives the electric output generated by the first operating member. It has a receiving means (10) for receiving the data created by the data creating means when the wearing of the second accessory is determined.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block connection diagram showing an embodiment of an image pickup apparatus and an image pickup system according to the present invention.

In FIG. 1, 1 is a camera body, and 3
Reference numeral 0 is an accessory that can be attached to the camera body 1. The accessory 30 in the present embodiment is assumed to be a simple data back type (type incapable of communicating with the camera body).
The camera body 1 has six contacts 1a to 1f, and the simple data bag (accessory) 30 has contacts 30a, 3f.
It has four contacts 0b, 30d, and 30e. When the simple data bag 30 is attached to the camera body 1, the contacts 30a, 30b of the simple data bag 30,
30d and 30e are contacts 1a, 1b, 1 of the main body 1.
d and 1e, respectively.

Reference numeral 2 is a known photometric means, and a microcomputer (hereinafter referred to as MCU) 10 A / D-converts the output of the photometric means 2 to obtain a photometric output. Reference numeral 3 is an information setting means for inputting exposure control mode information, setting file sensitivity information, setting shutter speed information, aperture information from the photographing lens, etc. to the MCU 10. The switch SW1 is normally OFF, and is a release switch that is turned ON by pressing a release button (not shown). Reference numeral 4 denotes a display unit that displays various kinds of exposure information according to the output of the MCU 10. Reference numeral 5 is a sequence start-up means, which presses the release button after a predetermined calculation is completed to release the release switch S.
When W1 is turned on, the MCU 10 is activated to start the release sequence. For example, the magnet in the starting means 5 is energized to start the mirror up operation. A diaphragm control unit 6 performs automatic diaphragm control in the P mode and the S mode. A shutter control unit 7 controls the shutter curtain so that the shutter speed is set or the shutter speed calculated by the MCU 10 is achieved. Reference numeral 8 denotes a shutter charge film feeding means, which performs shutter charge after release and film winding and rewinding. 9 is E ² PR
The OM stores data that needs to be stored even when the power of the main body is turned off, such as data of the number of film frames that have been taken.

The MCU 10 carries out an apex operation based on the settings by the photometric means 2 and the information setting means 3 and transmits the display output to the display means 4, while the sequence starting means 5, the aperture control means 6 and the shutter after the release. The control means 7, the film feeding, the shutter charge means 8, the E ² PROM and the like are controlled. When the release button is pressed and the release switch SW1 is turned on, the MCU 10 activates the sequence activation means 5 when the apex operation is completed. The sequence starting means 5 starts the mirror-up and the narrowing-down operation. The MCU 10 activates the aperture control means 6 subsequent to the activation of the sequence activation means 5.

In the aperture priority mode (hereinafter referred to as A mode) or the manual exposure control mode (hereinafter referred to as M mode), even if the MCU 10 does not particularly generate the stop stop signal,
It is controlled by the aperture value set by the aperture ring of the lens. On the other hand, program exposure control mode (hereinafter referred to as P mode)
In the shutter priority mode (hereinafter referred to as S mode), the aperture ring of the lens can be stopped down to the minimum aperture position, but the MCU 10 sends a stop signal when the aperture value calculated according to the mode is reached. When the signal is generated, the aperture control means receives this signal and stops the aperture of the lens. In this way, the aperture value is controlled to obtain the proper exposure. Next, MC
U10 activates the shutter control means 7, the shutter control means 7 starts traveling of the front curtain of the shutter, and in the M mode, after a time corresponding to the set shutter speed, the P mode, S
In the mode or the A mode, the trailing curtain starts running after a time corresponding to the shutter speed calculated by the MCU 10.

FIG. 2 is a pattern diagram of the command dial according to the first embodiment of the present invention. FIG. 3 is a time chart showing pulses generated by the command dial according to the first embodiment of this invention.

The simple data back 30 is provided with an exposure correction dial (command dial) 37 (see FIG. 1).
Contact) 37A and 37B of the command dial 37 when the simple data bag 30 is attached to the body 1.
Is connected to the body MCU 10 via the contacts 30d and 30e.
Connected to ports P13 and P14.

The command dial 37 is provided with a pattern board 37C which rotates integrally with the command dial 37. The shaded portion in FIG. 2 is the conductor portion 37D, and G
Since the ND contact 37E is always in contact with the conductor portion 37D,
Since the contacts 37A and 37B are in contact with the conductor portion 37D, the potential signal between the contacts 37A and 37B becomes LOW. In FIG. 2, the contacts 37A and 37B are in the HI state, and the contacts 37A and 37B are configured to be HI as shown in FIG. 2 after one-click rotation by the click means (not shown).

When the command dial is operated to rotate in the one-click counterclockwise direction (CCW), the contact 37A first becomes LOW and then the contact 3 as shown in FIG. 3 (a).
7B becomes LOW, the contact 37A returns to HI, and the contact 37B returns to HI. One click is completed here.
Similarly, when rotated one click clockwise (CW),
The result is as shown in FIG. Here, when the contact 37B changes from HI to LOW while the contact 37A is LOW, CC
W rotation is performed, and when the contact 37B changes from LOW to HI when the contact 37A is LOW, CW rotation is indicated. In this way, the rotation direction and the number of rotation clicks of the command dial 37 can be known. It is a known technique to know the rotation direction and the number of rotation clicks by using two contacts.

When the exposure compensation dial 37 is operated, M
CU10 contacts 37 via ports P13 and P14
Exposure compensation dial 3 receives signals A and 37B
The exposure correction amount is set by measuring the rotation direction of 7 and the number of rotation clicks. The determined exposure correction amount is added during the apex calculation.

Since the MCU 31 of the simple data back 30 does not have a serial communication function with the MCU 10 of the main body 1, it cannot be imprinted with the data from the MCU 10 of the main body 1, but the "year / month / day" or "hour / minute / second" Basic operations as a data back such as imprinting are possible. The date and the like are set by the information setting means 33, and the mode setting means 3
When the imprint mode is set by 2, the display LC
It is displayed on D34 and the LCD 35 for imprinting.

The imprinting signal from the MCU 10 of the main body 1 is received by the contact 30b. The contact 30b is connected to the base of the transistor Tr1 and is connected to the O of the transistor Tr1.
ON / OFF of the imprinting lamp 36 is controlled by N / OFF.

FIG. 4 is a block diagram of the first embodiment of the present invention. FIG. 1 shows the case where the camera body 1 and the simple data back 30 are combined, but FIG. 4 shows the combination of the normal case back 40 (the accessory that cannot communicate with the camera body) and the camera body 1 without the imprinting function. It is a block diagram in the case of.

The camera body 1 has six contacts 1a to 1f, and the back cover 40 has contacts 40a, 40d, and 40e.
It has three contact points. When the back cover 40 is attached to the camera body 1, the contacts 40a, 40d, and 40e of the back cover 40 are connected to the contacts 1a, 1d, and 1e of the body 1, respectively. The signal from the exposure compensation dial 47 is
As in the case of the simple data back 30 described above, M
The exposure correction amount is counted by the CU 10 and is displayed and controlled.

FIG. 5 is a block diagram of the first embodiment of the present invention. FIG. 5 is a block diagram when a high-performance data bag (accessory of a type capable of communicating with the camera body) and the camera body 1 are combined. The main body 1 has six contacts from the contact 1a to the contact 1f.
Has the same number of contacts 20a to 20f, and when the high-performance data bag 20 is mounted on the main body 1, the contacts 1a to 1f and the contacts 20a to 20f are connected to each other. Unlike the case of the simple data back 30 and the case back 40, the exposure correction dial 27 is connected to the MCU 21 of the high-performance data back 20, and the rotation direction and the number of clicks of the exposure correction dial are counted by the MCU 21.

The high-performance data bag is constructed so that the shutter speed and the aperture value can be imprinted in addition to the imprint of "year / month / day" and "hour / minute / second".

Data of 5 bytes as shown in Table 1 is exchanged between the main body 1 and the high-performance data bag 20.

[Table 1]

Specifically, after transmitting the first byte of data from the high-performance data bag 20 to the main body 1, the remaining 4 bytes of data are sequentially transmitted from the main body 1 to the high-performance data back 20. The same number of communication memory areas M (1) to M (5) and DM (1) to MCU1 and MCU20 are provided respectively.
DM (5) is provided, and memory pointer N (= 1
~ 5) can be represented as M (N) and DM (N).

The data of the first byte is data back flag information, which is sent from the high function data back 20 to the main body 1. The data of the first byte is defined in the format shown in Table 2. Bit 7 is a flag for indicating that the data can be communicated, and is always 1 when the communication is possible. Bits 4 to 1 are 4-bit signed integers indicating the rotation direction and the number of rotation clicks of the exposure correction dial 27 provided on the data back.

[Table 2]

The data from the second byte onward is sent from the main body 1 to the high-performance data back 20. The data in the second byte is the film sensitivity, which is the SV value set by the main body 1 or read by the DX code. The data of the 3rd byte is the number of film frames that have been photographed, and is the number of film frames displayed on the main body 1, but when it is empty (when no film is loaded in the camera), it is set to $ 0E. The data in the 4th and 5th bytes are shutter speed information and aperture information, and are defined in the same format as the contents displayed on the main body 1, and are as shown in FIGS. 12 (a) and 12 (b). There is.

FIG. 6 is a flow chart of the main routine of the MCU 10.

In step S0, the power is turned on and the MCU 1
This is an initial setting routine that is executed only immediately after 0 is reset, and various settings necessary immediately after resetting such as release interrupt prohibition are performed. In step S1, a communication routine described later is called to communicate with the data bag. In step S2, it is checked whether bit 7 of the data M (1) of the first byte in which the received data back flag is stored is 1. If bit 7 is 1, the process proceeds to step S3, and if bit 7 is 0, the process proceeds to step S4. The high-performance data back 20 advances to step S4.
This is the case when it is considered that (the type of accessory that can communicate with the body) is not installed, and in that case, contact 1e.
The rotation direction of the exposure compensation dial and the number of clicks are counted through and 1d to set the exposure compensation amount.

The process proceeds to step S3 when the communication with the high-performance data back is established, and the data M (1) of the first byte in which the received data back flag is stored.
Bits 1 to 4 are received as a signed integer indicating the rotation direction and the number of clicks of the exposure correction dial, and the exposure correction amount is set.

When step S3 or step S4 is completed, a photometric routine is executed in step S5, the photometric output from the photometric means 2 is received, and this is A / D converted.
This A / D converted value is stored. In step S6, an information setting routine is executed to read the exposure control mode, the DX code of the cartridge, various information of the lens, the set shutter speed, etc. from the setting means 3. Next, an apex calculation routine is executed in step S7, exposure calculation is performed based on the information received in steps S5 and S6, and exposure is performed based on the exposure correction amount information received in step S3 or step S4. Correction is performed to obtain the shutter speed and aperture value for display and control. By executing the display routine in step S8, the display means 4
To display predetermined values such as the exposure value and the exposure correction value. At step S9, the release interruption prohibition is released. After step S9, the process returns to step S1. Therefore, thereafter, the interruption prohibition is always released.

When the shutter is released, the process jumps from step S44 of the interrupt processing routine shown in FIG. 7, which will be described later, to step S10 in FIG. 6, and the stack is cleared in step S10. That is, step S1 described above in FIG.
In any of the states up to S9, the state is changed so that the process can be performed from step S11. Then, in step S11, a sequence start-up routine is executed to start the sequence start-up means 5 to energize a magnet or the like and start a mirror-up operation. Subsequently, the aperture control routine of step S12 is executed, and when the aperture of the lens is reduced to a predetermined value, the aperture stop magnet of the aperture control means 6 is energized to lock the aperture. Next, in step S13, a shutter control routine is executed,
The shutter control means 7 is caused to control a predetermined shutter speed. In step S14, the mirror down, shutter charge, and film feeding routines are executed, and the mirror down, shutter charging, and film feeding means 8 are operated. When the operation is completed, the process returns to step S1 to shift to re-photometry after the mirror down. Subsequently, the processing is restarted in order from the photometry of step S1.

FIG. 7 is a flowchart of the release interrupt processing routine. This routine is step S9.
When the interrupt is released in (Fig. 6), steps S1 to S1.
While the operations of S9 and steps S10 to S12 are being performed, they are executed by interrupting every predetermined time (for example, every 2 ms). When this routine returns, the process returns to the process before the interrupt process in FIG. Immediately after the power is turned on, interrupts are prohibited, and execution is possible only after the interrupt is released in step S9.

When this routine is executed, first step S
At 41, it is checked whether or not the imprint flag PRNF on the RAM of the MCU 10 is 0. Imprint flag PRNF
Is 1 when the release operation is started by pressing the shutter button, and becomes 0 after the elapse of a predetermined time. This predetermined time is the transmission time of the imprint signal. If the flag PRNF is 0 in step S41, the process proceeds to step S42, and if the flag PRNF is 1, the process proceeds to step S45. The imprint flag PRNF is 0 before it is detected that the release operation is performed, and the process proceeds to step S42. In step S42, it is checked whether or not the input terminal P10 is L by turning on the release switch SW1, and if it is L, the process proceeds to step S43.
If it is H, the process returns and the process before the interrupt process is restarted. The release button is pressed and the release switch SW1
When is ON, P10 is L and step S4
Proceed to 3. In step S43, the P11 terminal is set to L to generate the imprinting signal (the signal instructing the data back to imprint the data) on the high function data back 20. In the following step S44, the imprint flag P
RNF is set to 1 and the timer built in the MCU 10 is reset. This timer is for measuring the transmission time tp of the imprint signal transmitted from the camera body to the data bag. When this step S44 ends, step S10 of the main routine of FIG. 6 described above.
Jump to.

When the interruption processing routine of FIG. 7 is entered during execution of step S11, the imprint flag PRNF is set to 1 in step S44, and therefore the process proceeds from step S41 to step S45. In step S45, the value t of the timer is compared with the transmission time tp of the imprinting signal set according to the sensitivity of the film loaded in the camera, and if tp is reached, the process proceeds to step S46 and still t
If it has not reached p, the process returns and the process before the interrupt of FIG. 6 is restarted.

When the predetermined transmission time tp is reached, the process proceeds from step S45 to step S46, and in step S46, the imprinting signal terminal P11 is set to H to stop the transmission of the imprinting signal from the camera body to the data bag. In step S47, the flag PRNF is set to 0. In step S48, interrupts are prohibited, and the process returns to the routine before the interrupt process of FIG. After that,
The interrupt routine of FIG. 7 is not executed until the interrupt inhibition is released again in step S9.

FIG. 8 is a flow chart of the communication routine of the MCU 10 which is called as a subroutine in step S5 of FIG.

In step S101, the terminal P12 is set to L, and after waiting for a predetermined time, it is set to H. Where P
Setting 12 terminals to L means generation of a start signal for starting data communication with the loaded data bag. When the high-performance data bag 20 is loaded, the Q12 terminal of the MCU 21 connected via the contact 1c and the contact 20c becomes L in response to the activation signal. However,
Even if the P12 terminal on the MCU10 side tries to become H after the predetermined time as described above, the P12 terminal also maintains the L state as long as the Q12 terminal of the MCU21 is L.

Then, in step S102, P12
It is checked whether or not the input to the terminal is L, and if the P12 terminal is H, the process proceeds to step S106, and if L, the step S10.
Proceed to 3. If the high-performance data back 20 is loaded, the P12 terminal becomes L, and therefore the process proceeds to step S103. When the high-performance data back 20 is not loaded, the P12 terminal is not dropped to L, so it becomes H. Then, the process proceeds to step S106, and the memory M (1) in which the data back flag information is stored is cleared. P1
To determine whether or not the two terminals are dropped to L,
This corresponds to determining whether the data bag loaded in the camera body 1 is a high-performance data bag, a simple data bag, or a normal case back.

As described above, step S10
The processes after 3 are executed only when the high-performance data bag 20 is attached. Steps S103 to S
The process of 105 is a process for receiving the data back flag information of the first byte from the high-performance data bag 20 to the main body 1. In step S103, the camera 1
Start the transmission of the serial clock from the data back to the data back. Next, in step S104, the elapse of a predetermined time, which is the total of the time until the signal transmission of the first byte ends and the time when the MCU 21 on the data back side becomes ready to receive the data of the second byte, waits. .
Then, in step S105, the communication data (first byte data described above) from the high-performance data back 20 stored in the serial register SR (not shown) of the MCU 10 is shown in the first table of the MCU 10 on the camera body side. Stored in the memory M (1).

The processing from step S107 to step S111 is processing for transmitting 4 bytes (2nd to 5th bytes) of data from the main body 1 to the high-performance data back 20. In step S107, N = 2 is set as the memory pointer of the transmission data. In step S108, the data in the memory M (N) of the MCU 10 (the film sensitivity of the second byte data because N = 2 at the beginning) is transferred to the serial register SR,
At 109, transmission of the serial clock from the camera to the data back is started. In step S110, the data stored in the serial register SR is transferred to the MCU 21 of the data back, and the time until the transfer is completed and then the next byte (3rd to 5th bytes)
It waits for the total time (predetermined time) until the MCU 21 on the data back side can receive the data. Then, in step S111, 1 is set to the memory pointer N.
Is added and returns when 5 is exceeded, step S1 in FIG.
To step S2. If 5 or less, step S1
Return to 08. Since N = 3 after the transfer of the second byte of data, the process returns to step S108 and the processes of steps S108 to S111 are repeated. After the transfer of the fifth byte of data, the process returns and the communication subroutine shown in FIG. 8 ends.

FIG. 9A is a flowchart of the main routine of the MCU 21 of the high-performance data back 20.
When the MCU 21 is reset by loading the battery in the data bag, initialization is performed in step S501, and steps S502 to S50 are performed even after the main body is powered off.
The process of 6 is repeated.

In step S502, the information setting routine is called to read the setting information such as the setting of the imprinting mode from the mode setting means 22 and to correct the data to be transferred by the information from the information setting means 23. In step S503, the rotation direction and the number of rotation clicks of the exposure correction dial 27 are read and stored as a signed integer in 1 to 4 bits of the memory DM (1) of the MCU 21. In step S504, it is checked whether the Q12 terminal is L or not. Q12 terminal becomes L because P12 terminal is L
Then, the communication from the main body MCU 10 was started. In this case, the process proceeds to step 505, and the communication routine shown in FIG. 10 is called to exchange data with the main unit MCU 10. If the communication is not activated from the main body MCU 10, the Q12 terminal is H, so the process proceeds to step 506. In step 506, the data set in step S502 and the data obtained through the communication in step S505 are displayed. When step S506 ends, the process returns to step S501 and the above processing is repeated.

FIG. 9B is a flowchart of the interrupt routine of the MCU 21 incorporated in the high-performance data back 20. The timer built into the MCU 21 is activated by a timer interrupt every 1 minute, and counts up for the date and time. Upon returning, the processing before the interruption in FIG. 9A is restarted.

FIG. 10 shows the step S505 of FIG. 9A.
9 is a flow chart of a communication routine of the MCU 21 called from, which corresponds to the communication routine of the main body 1 of FIG. 8.

In step S601, the data in the memory DM (1) of the MCU 21 is transferred to the MCU in order to transfer the data back flag information from the high function data back 20.
21 to the serial register DSR (not shown).
In step S602, the Q12 terminal is set to L to notify the main body 1 that transmission preparation is completed. Note that the P12 terminal has already become L in step S503, and even if the P12 terminal is going to become H after that, if the Q12 terminal becomes L, the P12 terminal can be held at L. In step S603, the process is repeated until the serial flag becomes 1. This serial flag is 1 byte (8
It is a flag that becomes 0 at the time point when each of the data of (bit) starts to be transferred, and becomes 1 every time when 8 pulses of the serial clock pulse from the MCU 10 are counted by the transfer. When this flag is 1, it means that the transfer of 1 byte is completed. When the 8-pulse serial clock is input from the main body 1, the serial flag becomes 1 and the 1-byte serial communication is completed. Then, it progresses to step S604. In step S604, the Q12 terminal is set to H to indicate that 1-byte communication is completed.

In step S605, the memory pointer N of the memory DM (N) in which the data received from the main body 1 is stored is set to 2. Then, step S6
At 06, the Q12 terminal is set to L to notify the main body 1 that reception preparation is completed. In step S607, the process is repeated until the serial communication is completed, that is, until the serial flag becomes 1 as in step S603. Then, in step S608, MC
The data transferred to the serial register DSR of U21 is stored in the data of the memory DM (N) of MCU21. In step S609, the Q12 terminal is set to H to indicate that 1-byte communication is completed. In step S610, 1 is added to the communication memory pointer N, and 1 is added to N.
If is less than or equal to 5, the process returns to step S606 to receive the data of the third and subsequent bytes, and if it exceeds 5, the process returns to end this subroutine and proceeds to step S506 in FIG.

FIG. 11 shows the main body 1 and the high-performance data back 2
It is a timing chart at the time of communication of 0. 8 to 10
The operation shown in the flow chart of will be described with reference to this figure.

In step S101, the MCU 10 sets t
When the P12 terminal is activated at the time of = tc1, the MCU
In step S502, step S503, step S504, step S506, and step 502, 21 captures this activation signal in step S504, proceeds from step S504 to step S505, and executes the communication routine of FIG.

The MCU 21 executes step S601 in FIG.
In, the first byte of communication data DM (1) (= data back flag information) is transferred to the serial register DSR of the MCU 21, and the Q12 terminal is set to L in step S602 (t = tc2). Then, the MCU 10 tries to set the P12 terminal to H at the time of t = tc3. Next, step S
In step 102, it is checked whether the P12 terminal is L or not. P12
The state of the terminal when the terminal and the Q12 terminal are connected via the contact 1c and the contact 20c is as shown in FIG.
Since it is pulled to the Q12 terminal and remains at L, step S10
2 to step S103, MCU10 to MCU
Start transmission of serial clock to 21 (Fig. 1
1 (e)). Then, the P13 terminal is connected to the serial clock terminal Q13 of the MCU 21 through the contact 21d. Therefore, in synchronization with this clock, the data back flag information (1
The second byte) is output. The first byte of information is the LSB
Is output one bit at a time.

This output is the contact 20 of the data back 20.
It is transmitted to the serial input terminal P15 of the MCU 10 via f and the contact point 1f of the camera body 1 and transferred bit by bit to the serial register SR of the MCU 10 in synchronization with the serial clock. When eight clocks are output from the P13 terminal (t = tc4), the transfer of 1 byte ends. Then, the serial flag of the MCU 21 becomes 1 and the process proceeds from step S603 to step S604, where Q12
The terminal is set to H (t = tc5). Subsequently, step S6
The memory pointer N is set to 2 in 05, and step S6
In 06, the Q12 terminal is set to L (t = tc6),
In step S607, the serial flag is set to 0 at once, and then the process waits until the flag becomes 1.

On the other hand, in step S104, the MCU 10 sets a predetermined time (the time until the signal transmission of the first byte is completed and the time after which the MCU 21 on the data back side is ready to receive the data of the second byte). Wait for the MCU 21 to be ready for reception. At this time, the P12 terminal causes the Q12 terminal to go to L
If you monitor the change from → H → L, it will be more reliable and faster. When the process proceeds from step S104 to step S105, the data back flag information transferred to the serial register SR is transferred to the memory M (1) of the MCU 10. Subsequently, the memory pointer N is set to 2 in step S107, and the data stored in the memory M (N) indicated by the memory pointer is transferred to the serial register SR of the MCU 10 in step S108.
Since N = 2 at the beginning, the film sensitivity of the second byte is transferred to the serial register SR. In step S109, the transmission of the serial clock from the MCU 10 to the MCU 21 is started (t = tc7). Then, in step S110, the serial clock transfer and the data back wait until the next data can be received. If the film sensitivity is IS0100 (SV = 5), the binary number 00000101 is output from the serial output terminal P14 of the MCU 10 in synchronization with the clock from the LSB. 1 when 8 clocks are issued (t = tc8)
The byte transfer ends. Then, the serial flag of the MCU 21 becomes 1 and the process proceeds from step S607 to step S608, where the serial register DSR of the MCU 21 is
The data transferred to the memory DM (N) of the MCU 21 is transferred. At first N = 2, so the film speed information is MC
It is stored in the memory DM (2) of U21. Then, in step S609, the Q12 terminal is set to H (t = t
c9). In the next step S610, 1 is added to the memory pointer N, and when 5 is exceeded, the process returns because the point where 2 changed to 3 at the beginning is, so the process returns to step S108 and waits for the third byte of data. On the other hand, the MCU 10 waits for a predetermined time in step S110, and then waits for step S1.
At 11, the memory pointer N is incremented by 1. N is 5
When the value exceeds 3, it returns, but since it has changed from 2 to 3, it returns to step 3108. Therefore, the data transfer of the third byte is performed. Below, step S
Steps 108 to S111 and steps S606 to S610 are repeated until N = 5, and the timing chart of FIG. 11 also has a waveform similar to t = tc6 to tc9. When transmission and reception of a total of 5 bytes are completed, MCU 10 and M
Both CUs 21 return from their respective communication routines to complete a series of communications.

FIG. 13 is a block diagram of the second embodiment of the present invention. Reference numeral 101 is a camera body, and 120 is a body 1
It is a high-performance type (a type that can communicate with the camera body) of an accessory (here, a data bag) that can be attached to.

FIG. 14 shows a simple function type accessory (data back) which cannot communicate with the camera body (13).
FIG. 2 is a block diagram when (0) is attached to the camera body 1. FIG. 15 is a block diagram when the simple back cover 140 having no data back function is attached to the camera body 1. The switches SW102 to SW105 are AF area selectors. This back cover 140 is also incapable of data communication with the camera. Only the points different from the first embodiment will be described below.

FIG. 16 is a plan view showing the display in the finder of the second embodiment of the present invention. A plurality of distance measuring areas 113 for measuring the distance to the subject are provided, and the user can select one or a plurality of distance measuring areas 113 from among them. The selected distance measuring area 113 is LE
Superimposed display is made in the viewfinder by a display means such as D or LCD, and is also displayed on the external LCD.
In the following description, it is assumed that one distance measuring area is selected,
For example, even when the camera automatically selects a distance measuring area from a plurality of selected distance measuring areas, the same effect can be obtained with the same configuration.

The high function data back is provided with an AF area selector as an operating member. The AF area selector is a swingable operating member, and is internally provided with four switches SW102 to SW105. The switches SW102 to SW105 are respectively the switches SW corresponding to the vertical and horizontal movements of the AF area selector. It is configured to be LOW.
That is, when the AF area selector is operated in the upward direction, the switch SW102 becomes LOW, and the switch SW103
Therefore, the switch SW105 becomes HI. When the AF area selector is operated diagonally to the upper right, the switch SW1
02 and the switch SW105 are LOW, and the switch SW1
03 and the switch SW104 become HI.

The high-performance data back MCU 121 reads the switch of the switch SW105 from the switch SW102 and transmits the state of the switch SW105 from the switch SW102 as 4-bit data when communicating with the body. Based on the received information, the MCU 110 determines a distance measuring point from a plurality of distance measuring points and sends it to the AFCPU 111. The AFCPU 111 measures the distance of the determined distance measuring point, and the result is measured by the lens MCU.
Then, the lens motor 151 drives the AF motor 152.

The simple data back 130 and the normal back cover 1
The AF area selector provided in 20 is connected to the AFMCU 111 in the body via a contact.

FIG. 17 is a main flowchart of the body MCU 110. Explaining only the points different from the first embodiment, communication is performed with the data back MCU 121 in step S101. In step S102, it is determined whether the communication is successful. If successful, the process proceeds to step S103, and the information of the AF area selector is stored from the received data. If the communication is not established, the simple data back 130
Alternatively, it can be considered that the back cover 140 is normally attached.
In that case, the process proceeds to step S104, and the AFMCU111
And the information of the AF area selector received by the AFMCU 111 is received, and the information is stored in step S105. In step S106, the AF area is set based on the stored information. AF in step S107
Information indicating the selected AF area is sent to the MCU 111. In step S108, photometry, calculation, and display are performed. The selected AF area is also displayed.

FIG. 18 is a flowchart of the AFMCU 111. In step S120, the AF area selector signal is read through the ports R4 to R7. In step S121, it is determined whether R4 is LOW for 2 ms. This is data back M of body MCU110
This is because P12 is set to LOW for a fixed time (here, 2 ms) when trying to communicate with the CU120. If it becomes LOW for the same time as that time, the switch SW105
It can be regarded as a signal of the body MCU 110 instead of the signal of.
This time (2 ms) is sufficiently shorter than the time for which a signal is generated when operated by a human. Where R4 is 2
If it is LOW for ms, the process proceeds to step S122, and this signal is not the signal of the switch SW105 but the body MCU.
It is ignored as the signal of 110.

After that, the process proceeds to step S123, communication with the body is performed, the information of the signal of the AF area selector is sent to the body, and the position of the set AF area is received. In step S124, the distance measuring unit 112 performs distance measurement, communicates with the lens MCU 121, and sends AF motor drive information. The imprinting method is that the body MCU 110 controls the irradiation time of the imprinting lamp in the case of the simple data back 130, and the data back MCU 21 controls the imprinting lamp in the case of the high function data back 120.
Different controls are performed depending on the type of data back. Regarding the control of this imprinting, Japanese Patent Laid-Open No. 1-2976.
Since the known technique disclosed in No. 38 is used, it is omitted here.

[0062]

As described above, according to the image pickup apparatus and the image pickup system of the present invention, when the discriminating means discriminates the mounting of the first accessory, the electric output generated by the first operating member is received, and the discriminating means. Is configured to receive the data created by the data creating means when it determines that the second accessory is attached, it is not necessary to provide an extra signal line for a communicable accessory, and communication is performed for an incommunicable accessory. It is possible to obtain an effect that it is not necessary to provide an MCU for doing so, and it is possible to reduce the cost.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing a first embodiment of an image pickup apparatus and an image pickup system according to the present invention.

FIG. 2 is a plan view showing a pattern of a command dial according to the first embodiment of the present invention.

FIG. 3 is a timing chart of the command dial showing the first embodiment of the present invention.

FIG. 4 is a block connection diagram showing a first embodiment of the present invention.

FIG. 5 is a block connection diagram showing a first embodiment of the present invention.

FIG. 6 is a flowchart of a body MCU showing the first embodiment of the present invention.

FIG. 7 is a flowchart of a body MCU showing the first embodiment of the present invention.

FIG. 8 is a flowchart of a body MCU showing the first embodiment of the present invention.

FIG. 9 is a flowchart of a high-performance data back MCU showing the first embodiment of the present invention.

FIG. 10 is a flowchart of a high-performance data back MCU showing the first embodiment of the present invention.

FIG. 11 is a timing chart showing the first embodiment of the present invention.

FIG. 12 is a conceptual diagram showing shutter speed and aperture value in the first embodiment of the present invention.

FIG. 13 is a block connection diagram showing a second embodiment of the present invention.

FIG. 14 is a block connection diagram showing a second embodiment of the present invention.

FIG. 15 is a block connection diagram showing a second embodiment of the present invention.

FIG. 16 is a front view of the display in the finder showing the second embodiment of the present invention.

FIG. 17 is a flowchart showing a second embodiment of the present invention.

FIG. 18 is a flowchart showing a second embodiment of the present invention.

[Explanation of symbols]

1 Camera Main Body 2 Photometric Means 3 Information Setting Means 4 Display Means 5 Sequence Starting Means 6 Aperture Control Means 7 Shutter Control Means 8 Film Feed Means 9 E ² PROM 10 In-body MCU 20 High-performance Data Back 21 Data Back MCU 22 Mode Setting means 23 Information setting means 24 LCD for display 25 LCD for imprinting 26 Imprinting lamp 27 Exposure compensation dial

Claims (6)

[Claims] 1. An imaging system comprising an imaging device (1) and a first accessory (30) or a second accessory (20) attached to the imaging device, wherein the first accessory can be operated externally. And a second operation member (37) for generating an electric output in response to the operation, wherein the second accessory is externally operable, and a second operation member for generating an electric output in response to the operation. (27)
A data creating means (21) for creating data based on an electrical output generated by the second operation member, wherein the image pickup device distinguishes an accessory mounted on the image pickup device (10, S2). ) And the determination means determines that the first accessory is attached, the first accessory
Receiving means (1) that receives the electrical output generated by the operating member and, when the determining means determines the attachment of the second accessory, receives the data created by the data creating means.
0) and are included. 2. The imaging system according to claim 1, wherein the first operating member and the second operating member are operating members for causing the imaging device to perform the same operation. 3. The first operating member and the second operating member are area selecting members for selecting a specific area from a photographing screen divided into a plurality of areas. The imaging system according to item 1. 4. The imaging system according to claim 2, wherein the first operation member and the second operation member are operation members related to exposure correction. 5. A first accessory that is externally operable and has a first operating member that generates an electrical output in response to the operation, and a first accessory that is externally operable and generates an electrical output in response to the operation. An imaging device capable of mounting a selected one of a second accessory including two operating members and a data creating unit that creates data based on an electric output generated by the second operating member, A discriminating means for discriminating an accessory attached to the image pickup device; and when the discriminating means discriminates the attachment of the first accessory, the electric output generated by the first operation member is received, and the discriminating means receives the electric output. 2 If you decide to attach accessories,
An image pickup apparatus, comprising: a receiving unit that receives the data created by the data creating unit. 6. The image pickup system according to claim 5, wherein the first operation member and the second operation member are operation members for causing the image pickup apparatus to perform the same operation.