JP2568267B2 - camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a camera capable of inputting digital information from the back.

[Conventional technology]

Conventional camera information input devices are provided with operating members such as levers, dials, and buttons for each function, or by operating a plurality of operating members simultaneously to operate the levers and dials for multi-function information input operation. It is provided to be used as a member.

Most of the information input devices of such a camera are arranged on the upper surface and the front side of the camera, and in particular, the information input operation members such as the lever and the dial are configured to be located near the release button.

[Problems that the invention is trying to solve]

However, in the above-mentioned conventional example, the information input operation member to the camera is located on the upper surface or the front side of the camera upper cover, and especially the operation member (multi-function, dial, etc.) which is multifunctional is arranged only near the release button. Therefore, there were the following disadvantages.

(1) When inputting information in the shooting state, the finger has to be released from the release button, and the shutter start-up is lost.

(2) When using a vertical position release button provided on the bottom of the camera or on a high-speed hoisting device, to perform vertical position shooting,
Since there is no operation member other than the release button near the release button, information cannot be easily input.

[Means for solving the problem]

In order to solve the above problems, the present invention is premised on a camera which is provided with a second digital signal input means on the rear surface in addition to the first digital signal input means provided on the upper surface or the front surface. The invention provides a first processing means for variably setting camera information such as an aperture value, a shutter speed, an exposure correction value, etc. by receiving a signal from the first digital signal input means, and the second digital signal input. Second processing means for variably setting camera information such as aperture value, shutter speed, exposure correction value and the like in response to a signal from the means, and camera information by the second digital signal input means when the release button is not operated. Is invalidated, and switching means for switching the input of camera information by the second digital signal input means to be valid during the photometric operation by operating the release button is provided. .

According to a second aspect of the present invention, a signal from the first digital signal input means is received, and an aperture value, a shutter speed,
A first processing unit for variably setting camera information such as an exposure correction value, and a signal from the second digital signal input unit for variably setting camera information such as aperture value, shutter speed, exposure correction value and the like. The second processing means for controlling the input of camera information by the second digital signal input means when the release button is not operated according to the setting of the shooting mode such as manual shooting, aperture priority shooting, and shutter priority shooting. A camera provided with switching means for switching between invalid and valid.

〔Example〕

1 to 7 show the structure of a camera as an embodiment of the present invention. In FIGS. 1 to 3, 10 is a camera body,
Reference numeral 11 is an eyepiece section, and 12 is an exposure compensation button that corrects the control value when the camera automatically controls the exposure, and an aperture setting button that sets the aperture of the lens during manual exposure. By rotating the dial 15 arranged at, exposure correction or aperture amount input setting is performed. 13 is an AE lock button that temporarily locks the control value when the camera is in automatic exposure control, 14 is a release button, 15 is a multi-function dial for inputting various information, and 20 is a back cover on the plane. A dial 30 for inputting information to the camera and a dial lock switch 21 for prohibiting the input of the dial 30 are provided on the (back side of the camera).

FIG. 4 shows a high-speed hoisting device that can be mounted on the camera body 1.
40 shows a state where the camera body 40 is attached to the camera body 10 and the camera is held in a vertical position. In the figure, high-speed hoisting device
40 has a release button for vertical position, not shown.

FIG. 5 shows a state in which the back cover 20 of the camera is opened, and is a perspective view showing a part of the inside of the back cover 20. In the figure, the contact groups 16a to 16f of the camera body 10 come into contact with the input information signal transmitting terminals 22a to 22f provided on the back cover 20 in a closed state of the back cover, and transmit information signals. The signal is transmitted to a control circuit in the camera body 10.

Reference numeral 23 denotes a signal generation circuit on the back cover 20 side, and a dial
A pulse signal is generated by the rotation of 30 and the camera body 10
The signal is output to the control circuit of.

FIG. 6 shows a cross section of the dial portion, and FIG. 7 is an enlarged view of the dial portion. Reference numeral 31 denotes a pattern of a dial substrate 33 which is fixed inside the back cover 20 and rotates with the rotation of the dial 30.
It is a dial contact piece that is in contact with 33a and outputs a signal, and has signal output terminal groups 31a to 31c. Reference numeral 32 is a click plate that rotates integrally with the dial 30, and a sphere 34 is urged by a spring 35 so as to be pressed against a mountain portion or a valley portion of the click plate. There is.

Next, an overall circuit of the camera according to the embodiment will be described with reference to FIG.

<Description of Fig. 8> 50 is a micro computer (hereinafter referred to as a micro computer)
Call CPU).

 VCC is the power supply pin, RES is the reset pin.

 PORT0 is an 8-bit parallel input port.

 PORT1 and PORT2 are 8-bit parallel output ports.

 P30, P31, P32, P33, P34, P35, P36, and P37 are input ports.

 P40, P41, P42, P43, P44, P45, and P46 are output ports.

 P47 is an input port.

 P50, P51, and P52 are output ports.

 SCLK is the clock output for serial communication.

 SIN is the data input for serial communication.

 51 is a power supply.

 52 is a switch for turning on the power.

53 is resistance. A capacitor 54 resets the CPU 50 when the power is turned on.

55 is a dial circuit for reading the value input from the dial 15.

Reference numeral 56 denotes a dial circuit for reading a value input from the dial 30.

 The details of the dial circuit will be described with reference to FIG.

 57 is a known LCD display circuit.

Reference numeral 58 denotes an LCD display, and all display patterns are shown in FIG.

When the input terminal CS is 1, the LCD display circuit 57 outputs the address A0,
The A1 and 8-bit data are fetched and displayed on the LCD display 58. The relationship between the data and the display is shown in Fig. 16.

 59 is a reference voltage source.

 60 is an SPC that measures the brightness of the subject.

 61 is a logarithmic compression diode.

 62 is an operational amplifier.

63 is an A / D converter that A / D converts the output of the operational amplifier 62 and outputs it as 8-bit photometric data.

Reference numeral 64 denotes a known diaphragm driving device, which narrows down the lens according to the value of the PORT1 output of the CPU 50 and outputs 1 to the terminal E when the operation is completed.

 65 and 66 are OR gates. 67,68,69,70 are AND gates.

 71 is an inverter.

 72 is a magnet that runs the rear curtain of the shutter.

 73 is a transistor for controlling the energization of the magnet 72.

 74 is a magnet that drives the shutter front curtain.

 75 is a transistor for controlling the energization of the magnet 74.

 76 is a magnet for driving the aperture driving device 64.

 77 is a transistor that controls the energization of the magnet 76.

78 is a magnet for activating a mechanical sequence (not shown).

 79 is a transistor that controls the energization of the magnet 78.

 80 is a hoist motor.

 81 is a transistor that controls the energization of the motor 80.

Reference numeral 82 denotes a photometry switch that is turned on by the first stroke of the release button 14 (hereinafter referred to as SW1).

An exposure switch 83 is turned on by the second stroke of the release button 14 (hereinafter SW2).

84 is a back cover switch (hereinafter SWBP) that turns off when the back cover 20 is opened and turns on when the back cover is closed.

A switch 85 turns on when the mirror is up and turns off when the winding is completed (hereinafter SW4).

 86 is a mode change switch (hereinafter SWMODE).

 87 is a function switching switch (hereinafter SWMF).

The 88 is a switch that is turned on by pressing the exposure compensation button 12 (hereinafter SWCOMP).

<Description of FIG. 9> FIG. 9 is a detailed drawing of the dial circuits 55 and 56.

 90 is an up-down counter.

 91 and 92 are OR gates.

 93 is a counter.

 94 is a parallel-serial converter.

<Description of operation of dial circuit> When the terminal RESET is high, the OR gate 91 also outputs high, and the counters 90 and 93 are cleared. Therefore, the counters 90 and 93 start operating when the terminal RESET goes low.

UP / DOWN and CLK that are inputs to the up-down counter 90
Are connected to dial switches SWDIAL1 and SWDIAL2, respectively. In the case of the dial circuit 55, the terminal 31b corresponds to the dial switch SWDIAL1, and the terminal 31c corresponds to the dial switch SWDIAL2. The dial circuit 56 is connected to a dial segment connected to the dial 15 although not particularly shown because it is similar. Here, the case of the dial circuit 55 will be described.

Turning the dial 30 one click clockwise turns the eleventh
As shown in the figure, the dial switch SWDIAL2 turns on, then the dial switch SWDIAL1 turns on, SWDIAL2 turns off, and SWDIAL1 turns off. The up-down counter 90 is configured to count when the clock terminal CLK rises high. Therefore, when the dial switch SWDIAL2 is turned off, the dial switch SWDIAL1 is in the on state, so that the up-down counter 90 counts down. Conversely, when the dial 30 is rotated one click counterclockwise, the dial switch SWDIAL1 is turned on as shown in FIG. 11, then the dial switch SWDIAL2 is turned on, and then the SWDIAL1 is turned off.
The signal changes in the order that AL2 is off. Therefore, when the dial switch SWDIAL2 is turned off, the dial switch SWDIAL1 is in the off state, so the up-down counter 90 counts up.

In this way, when the dial 30 is rotated clockwise, the up-down counter 90 can count down for each click and up-counts in the counterclockwise direction. The OR gate 92 outputs high when the output of the up-down counter 90 is not 0.

When the terminal REQ of the dial circuit 56 becomes high, the CPU 50 determines that the dial 30 has been rotated and performs serial communication. The count value of the up-down counter 90 is output as serial data to the terminal SOUT in synchronization with the clock of the terminal SCLK of the dial circuit 56, and at the same time, the counter 93 is output from the terminal SCLK.
Is counted, and when 8 clocks (for one communication) are counted, a high is output to the OR gate 91.

OR gate 91 changes to high and up counter
Clear 90 and counter 93 simultaneously. When the counter 93 is cleared, the output to the OR gate 91 falls to low, and returns to the initial state.

In this way, by clearing the up-down counter 90 every time 8 bits of communication are performed, the dial count value can be read.

<Description of Flowchart> The operation of the circuit will be described with reference to the flowcharts shown in FIGS. Assume that the initial state is a state in which all the switches are off, that is, the winding is completed and the back cover is open.

When the power switch 52 is turned on, the battery voltage is supplied to VCC. At that time, the capacitor 54 is gradually charged through the resistor 53, and the terminal RES of the CPU 50 is set to low for a certain period of time to reset the CPU 50. As a result, the CPU 50 starts operating in sequence from the RESET of the flow chart.

(Step 1) Initialization of registers, ports and flags MODER, COMPR, TVR, AVR, MFR, SVR, DIAL1R, DIAL2R
, And values are appropriately assigned to the respective registers.
MODER is 1 for manual mode, 2 for shutter priority, and 3 for aperture priority.

BPF, MFING, SWMFF, SW1DIAL, CHGDIAL, DIAL2EN are CPU
Flags in 50, each cleared to 0. Each output port is also cleared.

(Step 2) Output high to the output terminal P46.

(Step 3) Wait for a fixed time.

(Step 4) Drop output port P46 to low.

Dial circuits 55 and 56 by Step 2 to Step 4
Reset.

(Step 5) The back cover switch SWBP is detected. If the back cover 20 is now open, proceed to Step 6, and if the back cover 20 is closed, go to Step 6.
Proceed to 23.

(Step 6) Clear the back cover status flag BPF.

(Step 7) Flag DIAL2EN indicating presence / absence of dial 30
Clear.

(Step 8) Check the flag MFING indicating the setting of the multi function, and if it is 1, proceed to Step 87 and now 0
If so, proceed to step 9.

(Step 9) MF (multi function) switch 87
(SWMF) is detected, and if it is off, go to step 10.

(Step 10) The MR switch 85 (SW4) is detected. When the switch is off, the process proceeds to Step 11.

(Step 11) Since the mode switch 86 (SWMODE) is detected and turned off, the process proceeds to Step 12.

(Step 12) If the input port P47 is detected and the dial 30 is not rotated, the process proceeds to Step 13 because it is 0.

(Step 13) The photometric switch 82 (SW1) is detected.

(Step 14) If the AE mode register MODER is 3 (aperture priority), proceed to step 16; otherwise proceed to step 15.

(Step 15) Transfer the value of the shutter register TVR to the LCD display buffer LCD1R.

(Step 16) Clear the buffer LCD1R to 0.

(Step 17) If the AE mode register MODER is 2 (shutter priority), proceed to step 19; otherwise, go to step 19.
Proceed to 18.

(Step 18) Aperture register for LCD display buffer LCD2R
Transfer the AVR value.

(Step 19) Clear the buffer LCD2R to 0.

(Step 20) Register COMP to buffer LCD3R for LCD display
Store the value of R.

(Step 21) Register MODE in the LCD display buffer LCD4R
Store the value of R.

Therefore, from step 14 to step 21, now LC
5 for D display buffer LCD1R (value of shutter register TVR set in step 1), 5 for same buffer LCD2R (value of aperture register AVR set in step 1), buffer L
0 is stored in the CD3R, and 1 is stored in the buffer LCD4R.

(Step 22) LC by calling the display subroutine
The display is performed on the D display 58.

Here, the display subroutine will be described with reference to FIG.

(Step 119) 00 output to addresses A0 and A1 (Step 120) Output port PORT2 buffer for LCD display L
Outputs the value of CD1R.

 Here, 5 is output.

(Step 121) Output high to the output port P51.

(Step 122) Wait for a certain time.

(Step 123) Return the output port P52 to low.

The LCD display circuit 57 takes in the address and the data and performs the display by the high signal of the output port P51 at the steps 121 to 123. In this case, “30” is displayed as shown in FIG. This means that the shutter time is 1/30 second.

The same applies to steps 124 to 138 in the order of address 01.
The LCD display buffer LCD2R and 10 are the same.
The value of the buffer LCD4R is loaded into. Therefore, L
As shown in Fig. 10, the CD display 58 shows a shutter 1/30
The second, aperture F5.6, and mode are set to manual M. If the register MODER is 2 (shutter priority), the operations of steps 14 to 16 will cause the LCD
The display buffer LCD1R, the register TVR, the buffer LCD2R and the buffer LCD3R are 0, and the buffer LCD4R is 2 as well.
Therefore, the display is performed as shown in FIG. Similarly, when the register MODER = 3, the display is as shown in FIG. If all the switches are turned off without any operation as described above, step 5 → step 10 → step 11 → step 13 → step 22 → step 5 loop control is repeated, and mode, shutter seconds,
The aperture etc. is displayed continuously. Hereafter, this is called the main loop.

When the back cover 20 is closed while the main loop control is being repeated, in step 5, the process branches to step 23.

(Step 23) The flag BPF is determined. 0 in step 6
Since it is set to, proceed to step 24.

(Step 24) 1 is output to the output port P46, and the dial circuits 55 and 56 are reset.

(Step 25) Output 0 to the output port P45. Therefore, the output of the inverter 71 becomes high, and the AND gate 69
And 67 open to select the dial circuit 56 on the back lid side.

(Step 26) Perform serial communication. The serial communication clock of CPU50 is dial circuit 56 through AND gate 69.
Is transmitted to the SCLK terminal.

In synchronization with this, the value of the up-down counter 90 is read out and stored in the accumulator register (hereinafter abbreviated as register A) of the CPU 50 through the AND gate 67. By reading the value of the up-down counter 90, it is possible to confirm that the back cover 20 is securely attached.

(Step 27) Return the output port P46 to 0.

(Step 28) The value of the register A is determined. Since the RESET terminal is high, the up-down counter 90 is cleared, and the serial output of the dial circuit 56 becomes all zero. Accordingly, the flow branches to step 30 to set the DIAL2EN flag.

Also, when a normal back cover without the dial circuit 56 is attached, all the terminals 16a to 16f are open,
All serial communication data goes high. Therefore, register A is not zero and the DIAL2EN flag is cleared in step 29.

(Step 31) After setting the BPF flag, step 8
Return to.

After this, when the display returns to step 5 again, the BPF flag has been set, so step 2
The process branches from step 3 to step 31, and the resetting of the dial circuits 55 and 56 is not performed. Therefore, the dial circuits 55 and 56 can be reset only once when the back cover 20 is closed, and it can be determined whether or not the dial circuit 56 is mounted. When the back cover 20 is opened again, the BPF flag is cleared in step 6, so that each time the back cover 20 is opened and closed, it can be reset once.

When the dial 15 or the dial 30 is rotated while the back cover 20 is closed and the dial circuit 56 is connected, the REQ terminals of the dial circuits 55 and 56 rise to high and the input port is passed through the gate 65. Turn P47 high.

 Therefore, in step 12, the process branches to step 33.

(Step 33) Call the dial reading subroutine.

<Description of dial reading subroutine> (Step 151) 1 is output to the output port P45. Therefore, the output of the inverter 71 becomes low, and AND gates 68 and 70
Opens, and the dial circuit 57 on the main body is selected.

(Step 152) Perform serial communication. The serial communication clock (SCLK terminal) of the CPU 50 is transmitted to the SCLK terminal of the dial circuit 57 through the AND gate 70.

In synchronization therewith, the value of the up-down counter 90 is read out and stored in the register A of the CPU 50 through the AND gate 67.

(Step 153) The value of register A is stored in register DIAL1R (count register of dial 15).

(Step 154) DIAL2EN flag discrimination, dial circuit 56
Is connected, and if the DIAL2EN flag is 1, the routine proceeds to step 155.

(Step 155) Output 0 of the output port P45, and select the dial circuit 56 on the back cover side.

(Step 156), (step (157) in step 152,
Similar to step 153, the value of the up-down counter 90 is written to the register DIAL2R by serial communication and the process returns to the main flow.

If the dial circuit 56 for the back cover dial 30 is not connected, the flow branches from step 154 to step 158 to clear the register DIAL2R and return to the main flow.

Dial 1 to register DIAL1R by this subroutine
5. The count value of the dial 30 can be read into the register DIAL2R.

(Step 34) The value of the register MODER in the AE mode is determined, and if it is 1 (manual mode), the process proceeds to step 35.

(Step 35) C for switching TV and AV settings during manual operation
Determine the HGDIAL flag. In this case, since it has been cleared in step 1, the process proceeds to step 36.

(Step 36) Add the value of dial count register DIAL2R on the back cover side to the aperture register AVR. This allows
The aperture value can be changed by the number of clicks rotated with the dial 30. For example, when the motor is rotated counterclockwise by two clicks, the value of the up-down counter 90 becomes 2
Therefore, the register DIAL2R also becomes 2. The aperture register AVR becomes 7 at 5 + 2.

(Step 37) Determination of SWCOMP (exposure compensation switch).

(Step 38) Shaster register Change the shutter time by adding the value of dial count register DIAL1R on the TVR main unit side. For example, if you rotate one click clockwise, the value of the up-down counter 90 will be-.
The register DIAL1R also becomes -1. The value of the shutter register TVR becomes 4 from 5-1.

Then, in step 52, the limit subroutine is called.

<Explanation of Limit Subroutine> (Step 139) It is determined whether the shutter register TVR is larger than 10.

(Step 140) When the shutter register TVR is larger than 10, the register TVR is set to 10.

(Step 141) It is determined whether the shutter register TVR is smaller than 1.

(Step 142) When the shutter register TVR is smaller than 1, the register TVR is set to 1.

Therefore, when the shutter register TVR is between 1 and 10, the value is kept as it is, when it is larger than 10, it is set to 10, and when it is smaller than 1, a limit is applied to 1.

The same applies to (step 143) to (step 150), and the shutter register AVR is limited to 1 and 8, and the exposure compensation register COMPR is limited to between -3 and 3, and the process returns to the main flow.

The display is performed on the LCD from (step 14) to (step 22). This time, since the shutter register TVR is 4 and the aperture register AVR is 7, the display is as shown in FIG.

In this way, the aperture value can be arbitrarily changed with the dial 15 when the shutter speed is in shutter seconds, and the result can be confirmed on the LCD display.

Dial count register for dial 30 when back cover 20 does not have dial circuit 56 or when back cover 20 is open.
The aperture value cannot be changed at step 36 because it is always cleared to 0 at DIAL2R step 158. In such a case, if the dial 15 is rotated while pressing the exposure compensation switch 88 (SWCOMP), the flow branches to step 39 at step 37.

(Step 39) Add the dial count register DIAL1R for the dial 15 to the aperture register AVR.

Therefore, by rotating the dial 15 while pressing the exposure compensation switch 88 (SWCOMP), operations such as changing the aperture value and releasing the shutter to change the shutter time can be performed.

Further, some users may want to reverse the roles of the dial 15 and the dial 30 in the manual mode.
For that purpose, CHGDIA for manual TV and AV setting switching
An L flag is provided.

If the CHGDIAL flag has been set in the function setting mode described later, the process branches to step 40 in step 35.

(Step 40) to (Step 43) are almost the same as Step 36 to Step 39, except that the shutter register TVR and the aperture register AVR are completely replaced. Therefore, the dial 15 can be used to change the aperture, and the dial 30 can be used to change the shutter. Of course, exposure compensation switch 88 (SWCOMP)
While turning on, you can change the shutter time and release to change the aperture value.

AE mode register MODER other than 1 gives priority to a shutter,
In the case of aperture priority, the process branches to step 44 in step 34.

(Step 44) The SW1DIAL flag is determined. Since this has been cleared in step 1, proceed to step 46.

(Step 46) By adding the value of the dial count register DIAL2R for the dial 30 to the exposure compensation register COMPR, and thus rotating the dial 30,
The exposure compensation value of COMPR can be changed. For example, by rotating the dial 30 two clicks counterclockwise, the register DIAL2R becomes 2. Therefore, the exposure compensation register COMPR also becomes 2.

(Step 47) The exposure compensation switch 88 (SWCOMP) is determined. If it is off, go to step 48.

(Step 48) Determine the AE mode register MODER. If the priority is 2 (shutter priority), the flow branches to step 49;

Therefore, by rotating the dial 15, it is possible to change the shutter speed in the shutter seconds when the shutter is prioritized and the aperture value when the aperture is prioritized.

After the upper and lower limits are set in step 52, the respective modes are displayed. However, the exposure compensation register
Since COMPR is 2, the display is as shown in Fig. 10.

Also, when the dial circuit 56 is not connected as in the manual mode, the dial 15 is rotated while the exposure compensation switch 88 (SWCOMP) is turned on, and the process branches to step 51 at step 47 to change the exposure compensation value. You can also.

If the user easily changes the exposure compensation value, the SW1DIAL flag can be set in the function setting mode described below. In this case, step 44 branches to step 45.

(Step 45) The photometric switch 82 (SW1) is determined, and when the switch 82 (SW1) is off, the step 46 is performed.
The exposure compensation value cannot be changed no matter how much the dial 30 is rotated.

By turning the dial 30 while turning on the photometric switch 82 (SW1), the exposure compensation value can be changed for the first time.

The mode can be changed by turning on the mode switch 86 (SWMODE).

If the display is continued in the loop of the main flow, the mode switch 86 (SWMODE) is turned on to branch from step 11 to a subroutine.

(Step 76) If the dial is not turned, the input port P47 is 0, and therefore, the flow proceeds to Step 83.

(Step 83) Clear the LCD display buffers LCD1R to LCD3R and store the value of the AE mode register MODER in the LCD display buffer LCD4R.

(Step 84) Call the display subroutine. As shown in FIG. 10, only the current mode is displayed. Thereafter, the flow returns to the flow. Thereafter, while the mode switch 86 (SWMODE) is ON, the loop is performed in the order of step 5 → step 10 → step 11 → step 76 → step 84 → step 5.

Dial while turning on the mode switch 86 (SWMODE)
When 15 is rotated, input port P47 goes high and moves from step 76 to step 77.

(Step 77) Call the dial read subroutine.

(Step 78) Dial AE mode register MODER 15
Add the dial count register DIAL1R.

(Step 79) to (Step 82) are routines for limiting the mode between 1 and 3. As a result, the dial can be rotated counterclockwise to change the mode to manual M → shutter priority T → aperture priority A →, and clockwise rotation to A → T → M.

When the mode switch 86 (SWMODE) is turned off after the setting is completed, the display returns to the main loop and the display according to the newly set mode.

When the photographer points the camera at the subject and presses the release button to the first stroke while turning the main loop, the metering switch 82 (SW1) is turned on, and the exposure can be corrected by the dial 30 at step 45. Then, the flow branches from step 13 to step 53.

(Step 53) Measure the brightness of the subject from port PORT0, read the A / D converted value, and add the film sensitivity and exposure correction value. Here, the film sensitivity register SVR is 1
5 (that is, the ISO100 apex value), and the exposure correction value is the value set in the exposure correction register COMPR. The result is stored in the ISO register SVR.

(Step 54) The AE mode is determined. If the shutter is prioritized, the process proceeds to Step 55; if the aperture is prioritized, the process proceeds to Step 56; if the manual is used, the process proceeds to Step 57.

(Step 55) An appropriate aperture value is calculated by the EV-TV and stored in the aperture register AVR.

(Step 56) Calculate the appropriate shutter time with EV-AV,
Store in shutter register TVR.

(Step 57) The limit subroutine is called to limit the registers TVR and AVR.

In this way, the calculation in each mode could be performed.

(Step 58) Register TVR to LCD1 buffer LCD1R
Register AVR to the same buffer LCD2R,
Register COMPR to R and register MODER to the same LCD4R
Transfer the value of

(Step 59) Call the display subroutine. Therefore, the LCD display 58 is displayed as shown in FIG. The display for each mode is common except for the mode display portion.

(Step 60) The exposure switch 83 (SW2) is discriminated. If the switch is not turned on, the process returns to step 5, and step 5 → step
10 → Step 12 → Step 13 → Step 59 → Step 5
The loop of is repeated all the time while the metering switch 82 (SW1) is on, and the metering display is executed.

When the photographer further presses the release button to the second stroke at the time when the photometric value is displayed, the exposure switch 83 (SW2) is turned on. Therefore, the process branches from step 60 to a subroutine.

(Step 61) Output the aperture register AVR (aperture value) to the output port PORT1.

(Step 62) to (Step 63) output ports P41, P42
Is high, and the transistors 77 and 79 are turned on to energize the magnets 76 and 78. Then, the mechanical tension (not shown) is released by the magnet 78, the mirror is opened, and the aperture is narrowed down by the magnet 76.

After (Step 64) to (Step 65) wait for a predetermined time, the energization of the magnet 78 is stopped.

(Step 66) Wait until the refinement is completed. When the tension is released and the magnet 76 is energized, the diaphragm is narrowed down mechanically. When the diaphragm is narrowed down to a predetermined value, the diaphragm driving circuit 64 outputs high and the input port P37 becomes 1, so that the completion of diaphragm control can be known.

(Step 67) The output of the output port P42 is made low, and the magnet 76 is de-energized.

(Step 68) The real time is calculated from the TV of the apex value and the timer is set.

From (step 69) to (step 71), the magnet 74 is energized, and the shutter first curtain is advanced.

(Step 72) Wait until the timer expires.

From (step 73) to (step 75), the magnet 72 is energized and the rear curtain of the shutter runs.

With the above operation, the aperture and the shutter can be controlled. After a series of release operations, the flow returns to the flow.

When returning to the main loop, the release is completed,
Since the MR switch 85 (SW4), which is turned on when the mirror is turned on and turned off when the winding is completed, is turned on, the process branches from step 10 to step 159.

(Step 159) 1 is output to the output port P40, the transistor 81 is turned on, and the motor 80 is energized to start winding.

(Step 160) Wait until MR switch 85 (SW4) turns off.

(Step 161) When the winding of one frame is completed, the motor energization is terminated.

As described above, photometry, exposure, and winding control can be performed.

 Finally, the function setting mode will be described.

You can enter the function setting mode by turning on the MF switch 89 (SWMF).

If the MF switch 87 (SWMF) is turned on while the main loop is being executed repeatedly, step 9
Branch to 85.

(Step 85) MFING indicating the multifunction setting
Set 1 to the flag.

(Step 86) The SWMFF flag indicating the state of the MF switch 87 is set to 1 and the flow proceeds to the subroutine.

(Step 89) It is determined whether or not the dial has been turned. If not, proceed to step 97.

(Step 97) The state of the MF switch 87 (SWMF) is checked, and if it is on, the process proceeds to step 98.

(Step 98) Set 10 seconds for the timer.

(Step 99) The SWMFF flag is determined. In this case, since the setting is made in step 85, the process proceeds to step 108.

(Step 108) The value of the MF setting register MFR is determined. Since it is set to 1 in step 1, the process proceeds to step 109.

(Step 109) Set -1 to the LCD display buffer LCD1R.

(Step 110) Manual TV / AV setting switching
Determine the CHGDIAL flag.

(Step 111) If the CHGDIAL flag is 1, -1 is set to the LCD display buffer LCD2R.

(Step 112) If the CHGDIAL flag is 0, the same buffer LC
Set D2R to -2.

(Step 117) The buffers LCD3R and LCD4R are cleared.

(Step 118) Call the display subroutine.

 Therefore, the display is as shown in FIG.

"F-1" indicates that the CHGDIAL flag is currently being changed, "0" indicates that the CHGDIAL flag is 0, that is, the dial 15 performs shutter setting in the manual mode,
It shows that the dial 30 is set to the aperture setting. After the display, return to the flow.

When the process returns to step 8 again, the MFING flag is set, so the process branches to step 87 and jumps to the flow until the timer 10 seconds expires.

While the MF switch 87 (SWMF) is on, the timer continues to be set in step 98, so the function setting mode does not end.

When MF switch 87 (SWMF) is turned on, step 97 branches to step 100.

(Step 100) Clear the SWMFF flag as the MFSW status flag.

At this time, since the timer is not set, the MF switch 87 (SW
MF) Returning to step 5 with the switch off, if step 5 → step 8 → step 87 → step 100 → step 5 is repeatedly executed, the timer is reset to 0 after 10 seconds.
, The process branches from step 87 to step 88, the MFING flag is cleared, the function setting mode ends, and the process returns to the main loop.

When the MF switch 87 (SWMF) is turned on again in the function setting mode, the flow branches to step 98 at step 97.

(Step 98) Reset the timer to 10 seconds.

(Step 99) Since the SWMFF flag has been cleared at step 100, the process branches to step 101.

(Step 101) Check the value of the MF setting register MFR. Since it is 1, the process proceeds to step 102.

(Step 102) to (Step 104) invert the CHGDIAL flag.

In this way, by setting the SWMFF flag to 1 and turning it on, the function setting mode is entered. By turning it off once and turning it on again, the flag can be inverted, and the function of the CHGDIAL flag can be set. Can be.

When the dial 15 is rotated during the function setting mode, the input port P47 becomes high, and the flow moves from step 89 to step 90.

(Step 90) Call the dial read subroutine.

(Step 91) Set the timer to 10 seconds. Therefore, each time the dial rotates, the timer is extended.

(Step 92) Add the dial count register DIAL1R for the dial 15 to the MF setting register MFR.

(Step 93) to (Step 96) are routines for limiting the multifunction mode between 1 and 2. This allows the dial to rotate "F"
-1 "→" F-2 ", rotate clockwise to" F-2 "→" F
"-1" and the function being set can be exchanged. Note that 1 indicates that the TV and AV settings are being switched, and 2 indicates that the exposure correction is being set.

CHGD even when register MFR = 2, that is, SW1DIAL flag
As in the case of the IAL flag, Step 105 to Step 107
By pressing the MF switch 87 (SWMF) again, the SW1DIAL flag is switched, and the result is displayed in steps 113 to 116.

 In this way, the function setting of the camera becomes possible.

As explained above, by using the dial 15 of the camera body and the dial 30 attached to the back cover, it is possible to easily set the manual and exposure compensation. We were able to realize a function that allows input by changing various operations.

 FIG. 15 shows a second embodiment of the dial circuit.

In this embodiment, the discrimination of the dial circuit is performed by a method different from that of the first embodiment (detected by a method that does not perform communication). The difference from FIG. 9 is that a resistor 95 and a transistor 96 are added.

 The operation of this embodiment will be described.

When the CPU (50) detects that the back cover 20 is closed, it outputs a high level to the output port P46 as in the first embodiment. As a result, the counters 90 and 93 are reset. Further, since this signal is input to the base of the transistor 96 via the resistor 95, the transistor 96 is turned on, forcing the SOUT terminal to the low level. In this state
The CPU (50) outputs a low level to the output port P45, enables the AND gate 67, and sets the dial circuit on the back cover side.
Select 56. Next, the CPU (50) checks the input state of the SIN terminal. Since the SOUT terminal of the dial circuit 56 is low, the output of the AND gate 67 and the output of the OR gate 66 are low, and the SIN terminal of the CPU (50) is low. When the CPU (50) reads the input from the SI terminal, it is at a low level, and therefore determines that the back cover with the dial circuit 56 is attached.

For back lid without dial circuit 56, AND gate 67
Since the input terminal is open, it goes high, the output goes high, and the output of the OR gate 66 goes high. When the input of the SIN terminal of the CPU (50) is read high, the CPU ( 50) determines that the back cover without a dial circuit is attached.

In this embodiment, it is also possible to perform communication as in the first embodiment to determine whether or not the back cover with a dial is attached based on communication data.

〔The invention's effect〕

In the present invention, the second digital signal input means is provided on the back surface, the camera information input by the second digital signal input means is invalidated when the release button is not operated, and the camera information input is valid when the sidelight operation is performed by the operation. Therefore, it is possible to provide a camera that is functionalized to improve operability and prevents erroneous setting of camera information.

Further, according to the present invention, the camera information input by the second digital signal input means when the release button is not operated is switched between invalid and valid according to the setting of the photographing mode. It is possible to provide a camera in which the erroneous setting and the erroneous setting of camera information are prevented.

[Brief description of drawings]

FIG. 1 is a rear view of the camera of the present invention. FIG. 2 is a top view of the same. FIG. 3 is a side view of the same. FIG. 4 is a rear view showing that the camera of FIG. 1 is photographed in a vertical position in a state where the high-speed winding device is mounted. FIG. 5 is a partial cross-sectional rear view of the camera of FIG. 1 with a back cover opened. FIG. 6 is an enlarged sectional view of the dial in FIG. FIG. 7 is an explanatory view showing a dial pattern in FIG. FIG. 8 is an overall circuit diagram as a first embodiment. FIG. 9 is a detailed view of the dial circuit of FIG. FIG. 10 is an explanatory view showing a display example of an LCD. Fig. 11 is a timing chart. Figures 12 to 14 are flow charts. FIG. 15 is a detailed view of a dial circuit as a second embodiment. FIG. 16 is an explanatory diagram showing the correspondence between data and LCD display.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tatsuo Konno Inventor Tatsuo Konno 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Inc. Tamagawa Plant In-house (72) Inventor Atsushi Terashima, 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Inc. Tamagawa Office

Claims (3)

(57) [Claims] 1. A camera comprising a second digital signal input means provided on the rear surface in addition to a first digital signal input means provided on the upper surface or the front surface, the signal being received from the first digital signal input means. hand,
First processing means for variably setting camera information such as aperture value, shutter speed, exposure correction value, and the like, receiving signals from the second digital signal input means,
Second processing means for variably setting camera information such as aperture value, shutter speed, exposure correction value, and the like. When the release button is not operated, the camera information input by the second digital signal input means is invalidated, and the release is performed. A camera provided with switching means for switching the input of camera information by the second digital signal input means to be valid during a photometric operation by operating a button. 2. A camera having a second digital signal input means provided on the rear surface in addition to the first digital signal input means provided on the upper surface or the front surface, wherein a signal from the first digital signal input means is received. hand,
First processing means for variably setting camera information such as aperture value, shutter speed, exposure correction value, and the like, receiving signals from the second digital signal input means,
Second processing means for variably setting camera information such as aperture value, shutter speed, exposure compensation value, etc., and non-operation of release button according to setting of shooting mode such as manual shooting, aperture priority shooting, shutter priority shooting And a switching means for switching between invalidation and validity of the input of the camera information by the second digital signal inputting means at the time. 3. The second digital signal input means includes a dial-like operation member rotatably supported, and pulse signal forming means for generating a pulse signal in response to rotation of the operation member. The camera according to claim 1 or 2, wherein the operation member is positioned near the thumb in the camera holding state.