JPH08304906A - Sequence controller for camera - Google Patents

Abstract

PURPOSE: To provide a sequence controller enabling a photographer to surely recognize focusing point display within a finder without delaying an operating sequence. CONSTITUTION: A finder display LCD 13 presents a contour nearly equal to a photographic image plane and the focusing point display is performed on the center position of the display LCD 13 and two range-finding frames are respectively superimposed on an observed image through the finder on both sides of the center position. When a shutter release button is operated to be depressed to a 1st stroke and the 1st release switch of an operation switch group 12 is turned on, it is detected by a CPU 1. By performing range-finding by an AFIC 8, the focusing point display appears on the display LCD 13. When the shutter release button is operated to be depressed to a 2nd stroke and focusing driving by a pulse motor 32 is completed based on the already obtained range-finding data, the focusing point display is erased. The range-finding frame is displayed before starting winding film and erased when the range-finding operation in the case of next photographing is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sequence control device for a camera, and more particularly to a finder display timing control, a timing control for detecting the on / off operation states of a number of operation switches, and a temperature detection data updating means. Of a series of photographing operations such as the update timing control of the camera, the timing control of the on / off operation of the DC / DC converter, the film exposure control, the film feeding control, and the related operations.
The present invention relates to a camera sequence control device that is executed by a PU.

[0002]

2. Description of the Related Art In a camera sequence control device, a series of camera operations are performed under the control of a CPU, and the CPU can take three operating states of stop / pause / operation. There is.

That is, when it is necessary to execute various controls such as performing a series of photographing operations, for example, a main switch is turned on, and a shutter release button is pressed to operate a regular photographing operation for a predetermined time or more. When performing the next shooting without leaving the camera, keep the CPU in the operating state, and when performing only a part of the series of shooting operations, for example, after performing a regular shooting, wait for a predetermined time or more before the next shooting. When not in use, the CPU is put in a rest state, and when the main switch is turned off when the photographing is not performed for a while, the CPU is put in a stop state.

Due to the nature of the camera, it is not possible to use a large-sized power source for the CPU, and since it is limited to a small battery, a large-capacity battery can be used. This is because the battery life is lengthened by the minimum required power consumption according to the number of operation control modes.

Now, an example of a control mode in a conventional camera sequence control device has an automatic focusing function and measures a plurality of distances of a subject (multi-point distance measurement) and displays the distance measurement range. A camera in which a display indicating whether or not each focus detection point is in focus is superposed on the observation image of the finder will be described as an example with reference to the flowchart shown in FIG.

The camera in the photographing standby state has a step # (hereinafter, “step #” is abbreviated as “#”) 1
In, the range-finding frame is displayed on the LCD member (liquid crystal display member) so as to be superimposed on the viewfinder observation image. And
When the first release switch is turned on in the next # 2, in other words, when the shutter button is pressed to the first stroke, the next #
3, photometry and distance measurement are performed, the photometry value is obtained, the shutter speed and aperture value corresponding to the proper exposure are calculated and stored, and the subject distance is measured and the distance measurement value is stored. , The next # 4.

[0007] Then, the stroboscopic light emission enable display LED (STLED) is turned on in a state where charging of the main condenser of the strobe is completed and stroboscopic light emission photographing is possible. In addition, the distance measurement state display L provided on the camera body
The ED (AFLED) blinks when the subject is positioned in front of the close range as a result of distance measurement by the distance measuring device, or when distance measurement becomes impossible due to insufficient contrast of the subject, etc. It lights up when the distance measurement is done normally.

Therefore, when the distance measurement is normally performed and the desired distance measurement data is obtained, the distance measurement state display LED is continuously turned on. At the same time, the focusing point is displayed on the finder by the LCD member (FLCD) so as to be superposed on the observed image and visually displayed (exposed), and the process proceeds to the next step # 5. # 5
Then, the second release switch is turned on, in other words, when the shutter button is pushed to the second stroke position where it is pushed by a predetermined distance from the first stroke, in the next # 6,
LED for strobe status display that is already lit in # 4
Then, the focus state display LEDs are turned off, the focus point display already displayed using the LCD member in # 4 is turned off and erased, and the process proceeds to the next # 7.

In step # 7, the taking lens is extended based on the distance measurement data already stored in step # 3 to bring it into focus, and in step # 8, the correctness already stored in step # 3 is stored. The shutter is opened / closed so that the shutter speed is set to a proper shutter speed and the aperture value is set to a proper value, so that the film is properly exposed. Then, in # 9, the drive for returning the taking lens, which has already been moved to the in-focus position in # 7, to the initial position side is started, and the taking lens is returned to the initial position. Then, in # 10, the film to which the proper exposure is applied in # 8 is wound up by one frame, the series of shooting operations is completed, and the camera is set to the shooting standby state.

Therefore, when focusing on the display operation of the focus point in the viewfinder display in such a camera, the photometry and the distance measurement performed immediately after the shutter release button is pressed and the first stroke is reached. The display of the focus point starts immediately after the completion, and the display is erased immediately after the shutter release button is further pressed to reach the second stroke.

Further, as a conventional technique devised in timing setting for superimposing a mark indicating a focused state on an observation image of a viewfinder, there is one disclosed in Japanese Patent Laid-Open No. 59-218432. A mark indicating the focus state, that is, the front pin /
Immediately after measuring the distance to the subject by displaying the timing of superimposing the marks expressing the in-focus / rear pin on the observation image of the viewfinder before measuring the distance, Alternatively, there is a method in which the display of the mark is erased after a lapse of a predetermined time and the mark indicating the focused state is displayed outside the field of view of the observation image in the viewfinder.

According to this conventional example, even after the distance measurement for focusing is performed, the mark is superposed on the photographed observation image, and a part of the subject is eclipsed, which is an obstacle to confirmation of the photographed observation image. In addition, since the focus mark is actively displayed outside the field of view of the photographed observation image after the distance measurement is completed, the mark indicating the focus state superimposed on the photographed observation image due to power drop or failure is displayed. It is intuitively understood that it has not disappeared. Further, as an example of a control mode in a sequence control device for a camera, an example in which two displays, that is, a range-finding range display and a range-finding impossible display, are displayed on one display member at appropriate timings is disclosed in Japanese Utility Model Laid-Open No. 56-74425. It is described in the official gazette.

That is, one display member superimposes on the observation image by the finder to display the distance measuring range and two displays in which the distance cannot be measured, and the portion corresponding to the distance measuring range in the viewfinder field is the other portion. A display means that looks different from the above is formed by a liquid crystal member (or an electrochromic element), and the display means is not displayed when it is detected that the focus cannot be detected by the distance measurement result by the distance measurement means. There is a sequence control device for the camera to put it into a state.

Further, as described in Japanese Utility Model Laid-Open No. 59-1038, after a focusing operation and a shutter operation are sequentially performed in response to a shutter release operation, a film winding operation and a shutter are successively performed. In a camera in which the operation and the charging operation of the focusing mechanism are performed almost simultaneously by the motor, the timing setting for displaying the focusing result is set from the end of the focusing operation to the charging operation process of the automatic focusing mechanism. There is a device in which the contents of the in-focus state can be easily confirmed by continuously displaying in the finder until the end time.

On the other hand, there are a large number of operation switches for instructing a series of operations in the camera, such as a distance measurement mode selection switch and a photometry mode selection switch. All the operation switches are connected to the CPU one by one. Since detecting the on / off operating state of each makes the configuration complicated, it is configured by connecting several operation switches to a matrix circuit and connecting to the CPU, and detecting the on / off operating state of the matrix circuit. It is widely practiced to simplify the above.

As an example of this, Japanese Patent Application Laid-Open No. 5-341347
There is a sequence control device for a camera described in the publication. That is, in this conventional example, the operation switches other than the main switch among a large number of operation switches are formed into a matrix circuit and connected to the CPU, and the ON / OFF operation state of the matrix circuit is repeatedly detected at a predetermined cycle. Is being simplified.

Along with this, the main switch is independently connected to the CPU and the main switch is turned on.
When it is detected by, the predetermined period is determined to be short by determining that the camera is ready for shooting, and the response time of the on / off operation state of the matrix circuit is shortened so that various operations can be performed quickly. When OFF is detected by the CPU, it is determined that the photographing is impossible, the predetermined period is lengthened, and the response time of the ON / OFF operation state of the matrix circuit is significantly reduced to reduce power consumption. There is.

Further, when detecting the ON / OFF operation state of the operation switch, an operation switch having three terminals of a common contact terminal, a normally closed contact terminal and a normally open contact terminal is constructed, and the common contact terminal is By connecting to the input part of the CPU, connecting the normally closed contact terminal to the L level potential (for example, ground potential), and connecting the normally open contact terminal to the H level potential (for example, + potential of the power supply), the operation switch When the common contact terminal is switched to the normally open contact terminal, the input part of the CPU is H
It is set to the level potential, and when it is switched to the normally closed contact terminal, it is set to the L level potential.

In this case, there is a problem that the operation switch is complicated because it uses a three-terminal type switch. To solve this problem, one end of the two-contact type switch has an L level potential (eg, ground potential). By connecting the other end to the H level potential (for example, the + potential of the power supply) through the pull-up resistor, the L level potential is applied when the operation switch is closed and the H level level is applied when the operation switch is opened. Since the potential is applied, the structure can be simplified. However, in this case, although the switch configuration can be simplified, current flows through the pull-up resistor when the operation switch is closed, and if the closed state continues, current continues to flow during that period. There is a problem that the electric power of is consumed.

A solution to this problem is JP-A-57-380.
It is a camera sequence control device of a camera described in Japanese Patent No. 27. That is, focusing on the fact that the on / off operation detection of the operation switch by the CPU suffices to apply a predetermined potential only to the detected pull-up resistance of the operation switch, the pull-up resistance is detected only during the operation switch detection period. The power consumption is reduced by setting the timing such that the predetermined potential is applied and the predetermined potential is not applied to the pull-up resistor of the undetected operation switch.

Further, Japanese Patent Laid-Open No. 2-69727 discloses that
In a camera using a power supply battery as an operating power supply, a dummy battery having the same shape as the power supply battery is provided with an output voltage of a circuit unit called an AC adapter for converting a commercial power supply into a DC voltage equivalent to the output voltage of the power supply battery. It is described that a connection is made through a connection cord, and a dummy battery in this state is mounted on a camera instead of a power supply battery to perform a predetermined camera operation.

In this case, in order to prevent the camera from malfunctioning when the connection cord of the AC adapter is disconnected, the voltage of the dummy battery is constantly monitored at regular time intervals, and when a voltage drop is detected. A supplementary power supply is provided so that the minimum necessary operation such as a reset operation associated with the power interruption is performed. Further, as a device devised to reduce the power consumption in the sequence control device of the camera, there is one described in Japanese Patent Laid-Open No. 55-57830.

In this conventional example, it is noted that photometry and display are not always performed, and that it is sufficient to perform only a part of the camera sequence, and only when necessary by rotating the dial member. The timer is activated and the metering, calculation and display circuits are supplied with electric power only during the operating time of the timer to reduce the consumption of the power source battery as much as possible.

Further, in the sequence control device of the camera, the operation of each part of the electric circuit and the mechanical control part constituting the sequence control device fluctuates depending on the environmental temperature. Therefore, the environmental temperature is detected, and various electric circuits are detected based on this data. And mechanical temperature compensation of the controller is required. If the temperature is constantly detected and the temperature of various electric circuits is constantly compensated based on this data, the power source battery will be consumed more. Therefore, in Japanese Patent Laid-Open No. 4-73627, Operate the timer set to a relatively long time to activate the temperature detection circuit at each operation time, consider the response delay corresponding to the detected temperature data obtained at this time, and compensate the temperature as necessary. Is to do.

Further, in the sequence control device of the camera, when the load of the power supply in the operation sequence increases, the power supply voltage to the CPU may drop, causing malfunction or program runaway. In order to prevent this, the one proposed in Japanese Laid-Open Patent Publication No. 59-48739 normally causes the CPU to work normally and causes a large load on the power supply in the operation sequence, for example, when driving a motor. When the CPU becomes
Only the function that retains necessary data is activated to reduce power consumption, and when the load becomes small, the CPU is restored and the CPU is restored.
By operating the battery regularly, the life of the power battery is extended.

[0026]

In the conventional camera sequence control device, the first problem is the viewfinder display, that is, in the conventional camera sequence control device, when the focus display is performed on the viewfinder, Depending on the operation and the display timing, the display time may become short and the photographer may not be able to confirm the in-focus display.

For example, in the conventional example described with reference to FIG. 25, when the shutter release button is pressed to the first stroke position to start the display and further pressed to the second stroke position to erase the display, If the push operation to the second stroke position is performed immediately after the push operation to the first stroke position, the display time is so short that the photographer cannot confirm the in-focus display. . Further, this problem remarkably occurs when a liquid crystal element whose display response is generally slow is used in the display section.

Therefore, a first object of the present invention is to provide a sequence control device for a camera having an operation sequence that allows a photographer to more reliably view the display when the focus display is performed on the viewfinder. Especially. Also,
As the second problem of the above-mentioned conventional example, there is a problem in the case where a large number of operation switches are formed in a matrix circuit, that is, when the matrix circuit is connected to a CPU and which operation switch is turned on is detected. The detection is performed at regular intervals, but if the power consumption for the detection is substantially constant regardless of whether the CPU is in the stopped / paused / operating state, the power saving effect is obtained. Can't work. This applies not only to the matrix circuit but also to the chattering detection circuit of the operation switch.

Therefore, a second object of the present invention is to connect the matrix circuit to the CPU, detect which operation switch is turned on, and which switch has chattering, and detect the state of the CPU. Stopped /
An object of the present invention is to provide a sequence control device for a camera, which can obtain an effective power saving effect depending on whether it is in a pause or an operation.

As a third problem of the above-mentioned conventional example, there is a problem regarding temperature compensation in the sequence control device of the camera. That is, in the above-mentioned conventional example, temperature compensation is performed by operating a timer set to a relatively long time to activate the temperature detection circuit at each operating time, and corresponding to the detected temperature data obtained at this time. Although temperature compensation is performed as necessary in consideration of response delay, there is some improvement effect, but due to the recent demand for camera miniaturization, the temperature sensor itself is sealed inside the IC etc. In this case, the temperature rises due to the heat generated during the operation of the temperature sensor itself, and a temperature difference occurs between the temperature sensor and the object to be temperature-corrected, and correct temperature correction cannot be performed. There are difficulties.

Therefore, a third object of the present invention is to provide a camera sequence in which the temperature sensor can obtain a detection timing such that correct temperature detection can be obtained even when the temperature becomes different from the temperature to be temperature-compensated due to self-heating. It is to provide a control device. In addition, as the fourth problem of the above-mentioned conventional example, there is a problem regarding power supply to the CPU. That is, in order to compensate for the drop in the power supply voltage to the CPU when the load on the power supply increases in the operation sequence, a booster circuit such as a DC / DC converter is operated. However, since it is performed even when the CPU is in the idle state, there is a disadvantage that unnecessary power consumption is performed.

Therefore, a fourth object of the present invention is to use a CPU that does not operate at the power supply voltage of the camera, but operates at the voltage when the DC / DC converter is operating, and operates the DC / DC converter when the CPU is reset. By doing D
The operating voltage of the CPU is secured without always operating the C / DC converter, and after the reset of the CPU is released, the ON / OFF operation of the DC / DC converter can be controlled on the CPU side, and thus the cumulative power consumption by the DC / DC converter is achieved. It is an object of the present invention to provide a sequence control device for a camera, which can save as much as possible.

[0033]

In order to achieve the first object, the present invention superimposes a focus point display on a viewfinder for observing a photographing screen, and a shutter release button up to the first stroke. A camera in which distance measurement for automatic focusing is started when is pressed, and film exposure is started when the shutter release button is located at the second stroke where the shutter release button is further pressed than the first stroke. In the sequence control device, when the shutter release button is pressed to the first stroke and the distance measurement is completed after that, the focus point is displayed on the viewfinder and the shutter is released. The release button is pressed to the second stroke,
Further, it is characterized in that focus point display control means for erasing the display of the focus point on the finder is provided before the film exposure after the lens is fed out for the focus drive.

Further, according to the present invention, in order to achieve the first object, the distance measuring frame display is superimposed on the viewfinder for observing the photographing screen, and the shutter release button is pressed until the first stroke. Sometimes, distance measurement for automatic focusing is started, and the shutter release button is set to the first
In a sequence control device of a camera in which film exposure is started when the film is exposed to a second stroke which is further pushed than the stroke, the shutter release button is pushed to the first stroke, and then the distance measurement is completed. When the shutter release button is pressed, the range-finding frame display already displayed on the viewfinder before the shutter release button is pressed is erased, and the shutter release button is pressed to the second stroke. It is characterized in that distance measuring frame display control means for displaying the distance measuring frame display on the finder is provided before the film is fed after the exposure is completed.

Further, according to the present invention, in order to achieve the second object, a series of camera operations are performed under the control of the CPU, and the CPU is stopped / paused / operated.
A sequence control device for a camera which takes one of two operating states, is activated from a rest state or a stopped state to an operating state, and detects the on / off operating state of a plurality of operation switches formed as a matrix switch by the CPU. The detection of the ON / OFF operation state of the matrix switch is selected such that the operation switch when the matrix switch is OFF or the ON state is not maintained is performed by interrupting the port of the CPU, and When the matrix switch is on,
Alternatively, the switch whose ON state is held is provided with a start-up selecting means for selecting execution by a timer interrupt to the port of the CPU, and the start-up process is changed depending on the state of the matrix switch. It is a thing.

Further, according to the present invention, in order to achieve the second object, a series of camera operations are performed under the control of the CPU, and the CPU is stopped / paused / operated.
In a sequence control device of a camera, which takes one of two operating states, is operated at a predetermined processing speed in the operating state, and is operated at a speed slower than the predetermined processing speed in a resting state, the CPU is in an operating state. First chattering detection means for detecting the chattering state of a plurality of operation switches formed as a matrix switch at short time intervals in the standby state, and when the CPU is interrupted and activated from the halt state or the halt state. In addition, the detection of the chattering state of the plurality of operation switches formed as the matrix switch is performed by the interrupt activation 1
A second chattering detection unit that is completed within a time period per turn, and is configured to change the detection of chattering when the CPU is activated from the idle state to the operating state and when the CPU is in the idle state. It is characterized by that.

In order to achieve the third object of the present invention, a series of camera operations are performed under the control of the CPU, and the CPU takes three operating states of stop / pause / operation. In a sequence control device for a camera, the temperature is controlled by the temperature detection means and the temperature detection data is sequentially updated to obtain temperature compensation data, and temperature compensation of the controlled object is performed by the CPU based on the temperature compensation data. When the duration when the CPU is in the stopped state or the rest state or the duration when the temperature detecting means is in the inoperative state is a predetermined time or more,
It is characterized in that it has a data updating means for using the temperature detection data obtained by the temperature detecting means as update data.

In order to achieve the third object of the present invention, a series of camera operations are performed under the control of the CPU, and the CPU takes three operating states of stop / pause / operation. In a sequence control device for a camera, the temperature is controlled by the temperature detection means and the temperature detection data is sequentially updated to obtain temperature compensation data, and temperature compensation of the controlled object is performed by the CPU based on the temperature compensation data. An operating time obtained by measuring a duration of time when the CPU is in an operating state or the temperature detecting means is in an operating state, and a duration of time when the CPU is in a non-operating state or when the temperature detecting means is in an inactive state. And a non-operation time for detecting the non-operation time, the operation time and the non-operation time obtained by the continuation time measurement means are compared, Work time is characterized in that it has a data updating means for temperature detection data and update data obtained by the temperature detection means when it exceeds a predetermined multiple with respect to the operation time.

Further, in order to achieve the fourth object of the present invention, a series of camera operations are performed under the control of the CPU, and the CPU is in three states of stop state / hibernation state / operating state. In a sequence control device for a camera that secures the operating voltage of the CPU by a DC / DC converter that boosts the voltage of a power supply battery, the on / off operation of the DC / DC converter is performed by the CPU.
Power source control for turning on the DC / DC converter and supplying the output voltage of the DC / DC converter to the CPU when a command for resetting the CPU is issued from the control means controlled from the side. Means and voltage holding means for holding the supply of the output voltage to the CPU by the power supply control means at least until the reset operation is completed in the CPU. is there.

According to the present invention, in order to achieve the fourth object, a series of camera operations are performed under the control of the CPU, and the CPU has three states of stop state / hibernation state / operating state. In a sequence control device for a camera that secures the operating voltage of the CPU by a DC / DC converter that boosts the voltage of a power supply battery, the on / off operation of the DC / DC converter is performed by the CPU.
Control from the side, and when the CPU is in a stopped state or a rest state, the above D
The C / DC converter was started to be turned on, and this on state was continued so that sufficient power supply could be obtained to ensure the operation of the CPU until the next interrupt processing command was issued. It is characterized in that it is provided with a control means to be turned off later.

[0041]

In the sequence control device for a camera configured as described above, when the shutter release button is pressed to the first stroke and distance measurement is completed, the focus point is displayed in the viewfinder and the second focus is displayed. After being pressed to the stroke, the display is maintained while the lens feeding operation is performed, and the display of the focus point is erased before the opening / closing operation of the shutter, which causes a delay in the sequence operation of the camera. The focus point is displayed (revealed) for a long time without fail to ensure the confirmation of the display.

The camera sequence control device configured as described above causes the distance measurement frame display to appear before the shutter release button is pressed to the first stroke, and is pressed to the first stroke. When it is operated and the distance measurement is completed, it is erased, and after the film exposure is finished, it is made to appear again before the film is fed.
Even in the case of a display element having a slow display reaction speed such as a CD, it is easy to confirm the distance measurement frame display without delaying the sequence, particularly in the case of quick shooting.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an overall configuration of an electric circuit of a camera to which a sequence control device for a camera according to an embodiment of the present invention is applied. CPU 1 and interface IC 2 are provided. This CPU
1 and the interface IC2 are connected by a control line S and are formed so that various data can be exchanged between them.

Further, a power supply battery 3 is provided as an operating power supply for each circuit portion of the camera body 50. Also,
CPU that selectively boosts DC voltage and stabilizes output voltage (function as series regulator) and CPU
Configured to have a function of resetting 1
A / DC converter 4 is provided.

The positive terminal and negative terminal of the power battery 3 are connected to the power input terminal Vin and the common terminal G of the DC / DC converter 4. The DC / DC converter 4 is provided with first and second control ends S1 and S2, and each of the first and second control ends S1 and S2 is connected to the CPU1.
It is connected to the. Further, the power supply output terminal Vout of the DC / DC converter 4 is the remote controller IC6, AEIC7,
The AFIC 8 and the date LED 9 are connected to respective power supply terminals.

The DC / DC converter 4 is constructed as shown in detail in FIG. That is, DC /
The DC converter 4 has a function of boosting the DC input voltage supplied between the power input terminal Vin and the common terminal G, and the common terminal G.
It has a function of stabilizing the DC output voltage generated between the output terminal Vout and the power supply output terminal Vout. These two functions are performed by inputting a control signal from the CPU 1 to two control ends, that is, the first control end S1 and the second control end S2, or from the first control end S1 and the second control end S2 to the CPU1. Will be performed based on the control signal output.

The integrated booster / stabilizer circuit IC has a common terminal a, a power input terminal b, a power output terminal c,
A first control end d, a second control end e, a third control end f ",
The common end a is connected to the above-mentioned common end G, the power supply input end b is connected to the power supply input end Vin through the coil L, and is connected to the anode of the Schottky barrier diode D. The cathode of the diode D is connected to the common end a via the capacitor C1.

Between the power output terminal c and the common terminal a,
The capacitor C2 is connected, the capacitor C3 is connected between the second control end e and the common end a, and the resistor R1 is connected between the second control end e and the power supply output end c. d
A resistor R2 is connected between and the third control end f.

Returning to FIG. 1, the CPU 1 requires a vibrator for oscillating a reference frequency (for example, 8 MHz) for obtaining a signal processing clock signal for various processes in the CPU 1, a clock circuit (not shown) and the like. Reference frequency to obtain the reference 1 second signal (for example, about 32.768 KHz)
Is connected to a crystal oscillating unit 5 having a built-in oscillator for oscillating. Note that a ceramic oscillator or the like may be used as the oscillator that constitutes the crystal oscillation unit 5.

Further, the CPU 1 receives a transmission signal from a remote control transmitter (not shown) for remotely controlling the camera operation and converts it into a predetermined control command signal.
6 and an AEIC 7 for calculating the shutter speed and aperture value corresponding to proper exposure based on the result of photometry
And an AFIC 8 for performing a predetermined distance measurement and focusing operation.
, And a date LED 9 for emitting light for recording message data such as shooting date and time on the film are connected to respective control ends of the four components.

This remote control IC6, AEIC7, AFI
The output terminal Vout of the above-mentioned DC / DC converter 4 is commonly connected to the + power supply terminals of the C8 and the date LED 9, and the − terminal of the power supply battery 3 is also commonly connected to the − power supply terminals thereof. . Further, a strobe 10 for emitting light as an auxiliary light source when the subject has low brightness or backlight is provided, the control end thereof is connected to the CPU 1, the + terminal of the power supply battery 3 is connected to the + power supply end, and the − power supply end. The negative end of the power supply battery 3 is connected to.

The strobe 1 connected to the CPU 1
The synchronizing signal from the CPU 1 can be supplied to the control end of 0, and the operation switch ST, which will be described later, is activated to set the flash photography, and the flash 10
A light-emission enable signal can be sent to the CPU 1 side when the main capacitor is completely charged and the light-emission state is set.

An external LCD 11 (see FIG. 3 for the installation position on the camera body 50) is provided, the control end of which is connected to the CPU 1, and a predetermined display, that is, a film counter display, is generated by a control signal from the CPU 1. The flash light emission mode display, the date display, the power supply battery reduced voltage display, and the like are performed. The + power supply terminal of the external LCD 11 is connected to the power supply output terminal Vout of the DC / DC converter 4, and the −power supply terminal is connected to the −power supply terminal of the power supply battery 3.

Further, an operation switch group 12 composed of a plurality of operation switches is provided, and in detail, the plurality of operation switches are formed in a matrix as shown in FIG. That is, the shutter release button 51 provided on the upper surface of the camera body 50 shown in FIG. 4 is the first release switch RL1 which is turned on when the shutter is pressed to the first stroke, and the second release switch RL1 which is further pressed. The second release switch RL2 is turned on when the switch is pushed to the position.

Further, a zoom lever 52, a flash mode setting button 53, a drive mode setting button 55, and a photographing mode setting button 56 are provided on the upper surface of the camera body 50, and a date mode setting button 54 is provided on the camera back cover. ing.
The zoom lever 52 is formed of an operation switch TELE that gives a command to drive the photographing lens to the telephoto side and an operation switch WIDE that gives a command to drive the photographing lens to the wide-angle side, and the strobe mode setting button 53 is formed of an operation switch ST. ing.

The date mode setting button 54 is used to select a date mode, for example, an operation switch MODE for giving an instruction as to whether the date recording mode is date recording or time recording, and date recording selection, for example, , Operation switch SEL for giving a command whether to display the date
It is formed of an ECT and an operation switch SET that gives a command for setting a date recording.

Further, the drive mode setting button 55 is constructed in the form of a rotary dial, and the click stop mechanism operates at every predetermined angle to perform the following five shooting operations, namely, "non-shooting, normal shooting, continuous shooting," It is performed by selecting whether to set "self-timer shooting or remote control shooting" by rotating the dial, and the corresponding "operation switch ON, operation switch CONT, operation switch S" is selected.
One of the ELF and the operation switch REM "is selectively turned on, and" non-shooting "is formed when neither is selected.

Further, the photographing mode setting button 56 is also formed in the form of a rotary dial, and the click stop mechanism operates at every predetermined angle, and the following six photographing modes, that is, "stroboscopic photographing in consideration of the reproduction of the night scene is performed. It is performed by selecting which of "Super intelligent shooting, landscape shooting, sports shooting, normal auto shooting, single AF shooting, portrait shooting" to be performed by dial rotation, and the corresponding "operation switch SUPER,
Operation switch LAND, operation switch ACT, operation switch AUTO, operation switch S-AF, operation switch P
Any one of the "ORTs" is selectively turned on.

Incidentally, the camera body 50 in this embodiment.
Is designed to feed the film each time the exposure of one frame of the film is completed, and to rewind the film automatically when the exposure of all the frames of the film is completed. Has become. For some reason, the film can be forcibly rewound after the exposure is completed up to the middle frame of the film. The rewind manual setting switch 57 for giving this command is 2
It is formed of a terminal type switch, and one end of the switch is connected to the ground potential G0 and the other end is connected to the input terminal MR of the CPU1.

Further, the back cover open / closed detection switch 58 for detecting the open / closed state of the back cover is constituted by a switch having three terminals of a common contact terminal, a normally open contact terminal and a normally closed contact terminal. The common contact terminal is connected to the CPU 1 and the common end G via the capacitor 59.
The normally open contact terminal is connected to the common terminal G, and the normally closed contact terminal is connected to the power source output terminal Vout.

Now, the operation switch group 12 is connected to the control end of the CPU 1, and the input / output mode is as follows.
The connection point marked with "○" is an N-channel open drain output, the pull-up resistor is connected with the connection point marked with "△", and the normal is pulled up to the H level. The pull-up resistor is not connected to the connection point marked with "▲", and it is set to H level when the three-terminal type switch is switched to one side, and is set to L level when switched to the other side. Will be done.

Returning to FIG. 1, a finder display LCD 13 is provided, and the finder display LCD 13 is the driver 1
4 is connected to the CPU1 via the EEPROM1
5 is connected to the CPU 1. This EEPROM15
A common end G is provided to each of the power supply ends of the driver and the driver 14.
And the power output terminal Vout are connected to each other.

Now, the above-mentioned finder display LCD 13
As shown in FIG. 5, has an outer shape substantially equal to the shape of the photographing screen, has a focus point display 60 at its center position, and has two center distance measuring range displays 61, 61 on both sides thereof. It is located. Focusing point displays 63 and 64 are located on both sides of the center distance measuring range displays 61 and 61, respectively. Wide-angle distance measuring range displays 62 and 62 are located on both sides of the focusing point displays 63 and 64, respectively.
Focusing point displays 66 and 67 are located on both sides of the same, and a telephoto distance measuring range display 65 is located on both sides of the same.

Although the details of the center distance measuring range displays 61, 61 will be described later, the operation mode is S-AF (single AF).
This is displayed when is selected or when PORT (portrait shooting) is selected. Further, the wide-angle distance measuring range displays 62, 62 are set in the operation mode S, although details will be described later.
-Displayed when AF (single AF) or PORT (portrait shooting) is not selected and the shooting lens is driven to the wide-angle side. Further, the range-finding range displays 65, 65 at the time of telephoto are driven to the telephoto side when the operation mode is not selected to SAF (single AF) or PORT (portrait photographing), although the details will be described later. Is displayed when

Reference numeral 68 denotes a panoramic photographing mask, which covers an extra portion of the finder observation image when performing panoramic photographing.
Reference numerals 8 and 68 have a function of showing a viewfinder parallax at a short distance, and are displayed integrally at the time of panorama including a portion where a strip-shaped area is divided and formed on the outer side of each. However, by displaying the above-mentioned strip-shaped area when it is determined that the subject is a short-distance subject as a result of distance measurement, it is possible to allow the photographer to accurately recognize the short-distance photographing range.

Returning to FIG. 1, the driver IC 2 is connected to the interface IC 2 connected to the CPU 1 via the control line S.
The zoom motor 23 and the feeding motor 24 are connected via 2, the shutter 26 is connected via the driver 25, and the lamp 28 is connected via the driver 27. The shutter 26 is opened and closed by an electromagnetic plunger or the like (not shown), and the lamp 28 is
This is the illumination light when the subject brightness is low and the desired distance measuring operation cannot be performed.

A common terminal G and a constant voltage control Tr21 are provided at the power supply terminals of the three drivers 22, 25 and 27, respectively.
The output end of is connected. Also, the interface I
A position detection circuit 29 is connected to C2. The position detection circuit 29 performs first, second and third position detection, and sequentially outputs the obtained first and second detection outputs PI and third detection output PR to detect the position. The signal P is obtained. Specifically, the first position detection is to detect the trigger position of the shutter blades in the shutter 26 with a photo interrupter, and the second position detection is to detect a predetermined reference position of the focus lens in the taking lens barrel. Each of them is detected by a photo interrupter, and the third position detection is to detect the perforation of the film being fed by a photo reflector.

The film sensitivity detecting circuit 30 reads the sensitivity of the film mounted on the camera by a DX code. A pulse motor 32 is connected to the interface IC 2 via a constant voltage driver 31. The pulse motor 32 is for driving the focus lens included in the taking lens, and is driven by the voltage converted into a constant voltage by the constant voltage driver 31. Further, the power supply to the constant voltage driver 31 is supplied with the output voltage of the power supply battery 3 via the constant voltage control Tr21.
And this constant voltage control Tr21 is interface IC2
What is controlled by the control output of is given.

Reference numeral 16 is an external device connecting portion, which gives an operation command to the camera and retrieves various information on the camera side by connecting an external device (personal computer, electronic notebook, etc.). Things are coming. The operation of the sequence control device for a camera according to the present embodiment configured as described above will be described below.

First, with reference to FIGS. 1 and 4 to 7, the timing operation performed by superimposing the distance measurement frame and the display of the focus point on the observation image of the finder will be described with reference to the flowchart shown in FIG. In this explanation, the shooting mode set by the shooting mode setting button 56 is set to the portrait mode, the operation mode set by the drive mode setting button 55 is set to the normal shooting mode, and the flash mode setting button 53 is set to the flash shooting. Mode is set,
The description will be given on the assumption that the shooting screen size is set to a standard size other than the panoramic size.

The camera in the shooting standby state is # 1.
As in No. 1, the distance measuring frame is in a state of being displayed (appeared) by being superimposed on the viewfinder observation image by the LCD member. That is,
Only the center distance measuring range display 61 of the finder display LCD 13 shown in FIG. 5 is displayed.

Then, at # 12, the first release switch RL1 is turned on, in other words, the CPU 1 detects that the shutter release button 51 has been pushed to the first stroke, and the chattering is detected. If it is OK, the process proceeds to the next # 13 and the AEIC
7. The photometry by 7 and the distance measurement by the AFIC 8 are performed, the photometric value is obtained, the shutter time and the aperture value corresponding to the proper exposure are calculated and stored in the EEPROM 15, and
The subject distance is measured, the measured distance value is stored in the EEPROM 15, and the process proceeds to the next step # 14. Then, at # 12, when the main conden of the strobe, which has already started the flash photographing preparation, has been charged and the strobe flash photographing is enabled, the strobe flashable display LED, which is one of the display LEDs 33, is turned on. To be done.

In addition, the distance measuring state display LED provided in the camera body 50 causes the subject to be positioned in front of the close range or lack of contrast of the subject as a result of distance measurement by the distance measuring device. It blinks when the distance measurement becomes impossible with and lights up when the desired distance measurement is performed normally, so the distance measurement is performed normally and the desired distance measurement data is obtained. The distance measuring state display LED lights up when the distance is reached. At the same time, the focus point display 6 sandwiched between the center range-finding range displays 61, 61 as a range-finding frame is displayed.
It is possible to confirm that 0 is displayed, and the central distance measuring range displays 61 and 61 are erased instead of being superposed on the observation image of the viewfinder so that the image can be visually observed.

In the next step # 15, the shutter release button 51
Is further pressed to turn on the second release switch RL2, in other words, when the shutter release button 51 is pressed to the second stroke position where the shutter release button 51 is pressed a predetermined distance from the first stroke, the next # 16 is performed. Is an LED that can be used for strobe light that has already been turned on in # 14
And the distance measurement status display LED is turned off. And next #
The lens is extended at 17 to bring the lens into focus.

That is, the command (serial communication) from the CPU 1 is transmitted to the interface IC 2 via the control line S, and the constant voltage driver 31 receives the control signal FP shown in FIG.
The MO and the control signal FPM2 are supplied. This control signal F
The PMO and the control signal FPM2 are pulse signals whose phases are different from each other, and the pulse motor 32 is driven via the constant voltage driver 31. The drive amount at this time is AF
The distance has already been measured by the IC 8, and based on the distance measurement data stored in the EEPROM 15, only the amount necessary for focusing is driven.

Therefore, the point A is brought into the in-focus state. At this time, since the output voltage of the constant voltage control Tr21 connected to the interface IC2 is connected to the constant voltage driver 31 and its output is controlled to be equal to the voltage preset by the CPU 1, a reliable focus is achieved. Drive is performed. After that, the focus point display 60 already displayed in # 14 is turned off.
Immediately after this, a series of opening and closing operations of the shutter 26 are started, and at the same time, the H level magnet energization signal MAG from the interface IC 2 is supplied to the shutter 26 via the driver 25, the shutter opening operation is performed, and the shutter is fully opened. . At the same time, the CPU 1 supplies the H-level synchro signal SY to the strobe 10, and the strobe light is emitted.

Then, the shutter closing operation is started.
At this timing, the proper exposure calculation is performed on the photometric value data which has already been photometrically measured by the AEIC 7 at # 13.
It is controlled based on the data stored in the EPROM 15. In this way, after the shutter opening / closing operation is completed and the film is properly exposed, the lens is returned as # 20. In this operation, each of the control signal FPMO and the control signal FPM2 is supplied in the opposite phase.
Therefore, the lens is returned to the initial position.

The lens returned to the initial position is adapted to carry out the lens extension to the lens standby position after resetting the position, the control signal FPMO and the control signal FPM2 by the signal P. Since this is done, it is possible to eliminate unnecessary parts for lens movement during focusing drive, and therefore the time required for focusing can be shortened.

At point B immediately after the execution of # 20,
The central distance measuring range display 61 as the distance measuring frame is displayed again, and film winding is performed in the next # 22. In this film winding, the feeding motor 24 is rotationally driven by setting three types of control signals WZMD1 to WZMD1 to WZMD1 to W3 supplied to the driver 22 from the interface IC2, respectively. The signal P detected by the position detection circuit 29
H-level pulse is generated at, and by counting this, when one pulse is obtained, the winding of one frame is completed,
After the series of shooting operations is completed, the camera enters the shooting standby state.

Next, with reference to FIGS. 1, 3, and 9 to 21, the operation of the operation switch group formed in a matrix will be mainly described with reference to the float charts of FIGS. 13 and 14. First, how the switch actuation detection by the operation switch group 12 is performed when the CPU 1 is in each of the stopped / paused / operating states will be described.

When the CPU 1 is in the stopped state, the port state of the operation switch group 12 is detected as shown in FIG. 8 with respect to the operation switch group 12 forming the photographing mode setting button 56 (FIGS. 3 and 4). Control signal MCTL
Since 0, MCTL1, and MCTL2 are all at the H level, even if the operation switch forming the photographing mode setting button 56 is operated, detection is not performed.

For the group of operation switches forming the drive mode setting button 55, the detection control signal DCTL
Since 0 and DCTL1 are both at the L level, when the operation switch forming the drive mode setting button 55 is activated, the detection signal DSW0 or the detection signal DSW1 enables detection. Further, a shutter release button 51, a zoom lever 52, a flash mode setting button 5
3. Detection control signals CTL0 and CTL for operation switches forming each group of date mode setting buttons 54
Since both 1 and CTL2 are at the H level, detection is not performed even if the operation switches forming the group are operated.

On the other hand, when the CPU 1 is in the resting state, the port state in the operation switch group 12 controls the operation switch group forming the photographing mode setting button 56 as shown in FIGS. 9 and 10. Signal MCTL0,
MCTL1 and MCTL2 have a predetermined timer pause period (1
During the second), the L level is sequentially set twice, so
During the L level period, the operation of the operation switch forming the photographing mode setting button 56 is performed by detecting the detection signal MSW0 and the detection signal MS.
It will be obtained as W1.

For the operation switch group forming the drive mode setting button 55, the detection control signal DCTL
0 and DCTL1 are sequentially set to the L level twice during the predetermined timer operation time (1 second), and thus the operation of the operation switch forming the drive mode setting button 55 is detected during the L level period. Signal DSW0 and detection signal DSW1
Will be obtained as.

Further, the detection control signals CTL0, CTL1 and CTL2 for the operation switches forming each group of the shutter release button 51, the zoom lever 52, the flash mode setting button 53 and the date mode setting button 54 are all at the L level. Therefore, when the operation switch forming the group is operated, the operation is obtained as the detection signal SW0, the detection signal SW1 and the detection signal SW2.

On the other hand, when the CPU 1 is in the operating state, as shown in FIGS. 11 and 12, the detection control signals of three systems, that is, the detection control signals MCTL0, MCTL1, MC.
TL2 system and detection control signals DCTL0, DCTL1
System and detection control signals CTL0, CTL1, CTL2
With this system, the operating states of all the operating switches can be detected periodically (4 milliseconds) in a shorter cycle than in the case of the idle state shown in FIGS. 9 and 10. In addition,
Manual rewinding setting switch 57 and back cover open / close detection switch 58
With respect to, the operating state is always detected, except when the prohibition is applied by the interrupt operation described later.

As for the chattering detection, since the switch operation is detected twice by the CPU 1 within the predetermined period as described above, the change at each time is detected, and if they are the same, there is no chattering. If it is not the same, it is determined that chattering is present and the previous detection result is adopted. Therefore, by changing the chattering detection period between when the CPU 1 is operating and when the CPU 1 is activated after the CPU 1 is idle, the chattering of the switch can be detected quickly even when the CPU 1 is idle and activated, and the switch ON processing can be performed. Can be done quickly.

The chattering is detected by detecting a large number of switches constituting the operation switch group 12 once every 4 mS when the CPU 1 operates. Chattering is detected twice at the time of switch detection, and if the two values are the same, the value is adopted, and if the values are different, the previously obtained result is the chattering result of this time. Furthermore, C
At the time of starting from PU1 (every 1 second by the second interrupt), each switch is detected twice by one start, and the chattering result of this time is obtained by one start, so that the switch can be immediately turned on.

In this case, if each switch is detected only once by one start-up, the switch-on processing cannot be performed until the start-up is performed twice, that is, two seconds have not passed. Comparing the above-mentioned “points A and B” with “point C”, there is a difference in the speed of chattering processing because the operating speed of the CPU 1 is high and low. Further, in the state where the timer is stopped for 5 minutes, the taking lens is forcibly driven to the wide side like # 31. Then, in the next step # 32, the key-ON interrupt request is cleared. This request is
As shown in FIG. 15, the external interrupt is prohibited. After this state is set, the CPU 1 port is set to sleep (sleep) in # 33.

This is because the control signals CTL0 and CT among the control signals for the operation switch group 12 are shown in FIG.
Only the L1 and CTL2 systems are always set to the L level, the key ON interrupt port is set, and the shutter release button 5
1, the zoom lever 52, the flash mode setting button 53, and the date mode setting button 54 can always be detected, and at the same time, the rewind manual setting switch 57 can also be detected.

On the other hand, when the drive mode setting button 55 is in the off position, the taking lens is put in the retracted state in # 58, the key ON interrupt request is cleared in the next # 59, and the next # 60. The port stop (OFF) setting is executed. This port stop setting is performed by controlling the control signal DCTL among the control signals for the operation switch group 12 as shown in FIG.
0, DCTL12 system is always set to L level,
The key ON interrupt port is set so that the drive mode setting button 55 can always be detected, and at the same time, the rewind manual setting switch 57 can also be detected.

Then, in next step # 34, the external interrupt request is cleared. This external interrupt prohibits the key-ON interrupt as shown in FIG. 21, the direction of the edge detection of the back cover is set in the next # 35, and the key is turned ON in the next # 36.
Interrupts and external interrupts are enabled, periodic timer interrupts are prohibited, the pause timer is cleared in the next # 37, and switch change data is cleared in the next # 38. In next step # 39, the crystal oscillation unit 5 oscillates the main clock and the sub clock, and the processing speed of the CPU 1 is set to a low speed.

Thereafter, in # 40, the oscillation of the main clock in the crystal oscillation unit 5 is stopped, the oscillation of the sub clock is continued, and the above-mentioned low speed mode is continuously set. After this, the process proceeds to # 41 of FIG. 14 via a relay point for the convenience of drawing creation. # 41 gives an interrupt permission. This interrupt is the second interrupt shown in FIG. 18 or the regular interrupt shown in FIG. In the second interrupt shown in FIG. 18, the second interrupt request is cleared, the clock count for a predetermined set time is started, and when the count is completed, the pause timer starts counting.

In the periodic interrupt shown in FIG. 19, the operating state of each operation switch of the operation switch group 12 is detected, and a predetermined display is made on the external LCD 11 according to the result. Then, in the next step # 42, a sleep (sleep) state is set. In the next step # 43, it is determined whether or not there is a key ON interrupt request. If Yes, the process proceeds to # 50 and the key O
The N interrupt request is cleared, the process proceeds to # 51 to execute the key ON interrupt, the key ON interrupt and the external interrupt are prohibited, and the port operation (ON) is set at the next # 52. In this port operation setting, as shown in FIG. 20, all ports of the control signal of the three systems to the operation switch group 12 are always set to L level, the key ON interrupt port is not set, and the DC / DC converter 4 is turned ON. Of.

Then, the process shifts to # 53, the oscillation of the crystal oscillating unit 5 is performed in both the main and the sub, the processing speed of the CPU 1 is reduced, the process waits in the next # 54, and the crystal oscillating unit in the next # 55. 5 oscillation is performed in both main and sub, and CP
The processing speed of U1 is increased, the periodic interrupt is permitted in the next step # 56, and the temperature is read in the next step # 57. This temperature reading is performed by the CPU 1 as shown in FIG.
The stop timer is set to the stop timer or the stop time is set to the stop timer. Therefore, this value is more than the predetermined time (10 minutes in this example). At this time, the temperature detection data obtained by the temperature detection means is used as update data.

Further, in the above temperature reading, the part of the judgment of "pause timer 10 minutes elapsed?" Shown in FIG.
As shown in FIG. 23, it may be replaced by whether or not the judgment criterion “T1> (a × T2)?” Is satisfied. In this case, the time T2 is an operating time obtained by measuring the duration of time when the CPU 1 is in the operating state or the temperature detecting means (not shown) is in the operating state.

Further, the time T1 is a non-operation time obtained by measuring the duration of time when the CPU 1 is in the non-operation state or the temperature detecting means (not shown) is in the non-operation state. Also, a
Is a predetermined multiple, and in this example, a = 100. Then, the operating time T2 and the non-operating time T1 are compared, and when the non-operating time T1 exceeds a predetermined multiple a of the operating time T2, the temperature detection data is used as update data.

Regarding the temperature compensation, temperature compensation of the controlled or controlled object by the CPU 1 is performed based on the temperature compensation data obtained by sequentially updating the temperature detection data detected by the temperature detecting means (not shown) at a plurality of time points. Is to do. In the case of NO in # 43, the process proceeds to the next # 44, and it is determined whether or not there is an external interrupt request. In the case of YES, the back cover interrupt request of # 49 is cleared and # 51. And the subsequent processing is performed as described above.

In the case of NO in # 44, it is determined whether or not the drive mode setting button 55 is off by shifting to the next # 45, and in the case of YES, it is returned to # 42 and in the case of NO. The operation switch group 1 for # 46 and # 47 twice.
It is detected whether or not there is a switch operation in step 2, and when it is determined in the next step # 48 that there is a switch change, # 51.
After that, the subsequent processing is performed as described above.
If NO in # 48, the process returns to # 42 and the subsequent processes are performed in the same manner as described above.

Next, DC / which boosts the voltage of the power supply battery 3
1 and 2 and 2 focusing on the fact that the output voltage of the DC converter 4 can operate the CPU 1 in the operating state.
4 will be described. The CPU 1 is in the sleep state when the timer sleep or the drive mode setting button 55 is located in the off state. In this state (# 60), it is determined in the next # 61 whether or not a key-ON interrupt request is made, and in the case of NO, it is determined in the next # 62 whether or not an external interrupt is requested, and NO. In this case, the process proceeds to the next # 63.

At # 63, it is determined whether or not the drive mode setting button 55 is OFF, and if NO, at # 64.
In # 65 and # 65, the switch detection in the operation switch group 12 is performed twice. Then, in the next step # 66, it is determined whether or not there is a switch change, and if YES, a startup process is performed. If either # 61 or # 62 is YES, the process jumps to # 66 and is activated.

Further, # 63 is YES or # 66 is NO.
In the case of, the process proceeds to # 67, and the ON processing of the DC / DC converter 4 is started. This turn-on process starts with # 68.
Then, the DC / DC converter 4 is turned on and a timer is set. In the next # 69, DC / D
The voltage Vcc and the voltage Vo at the power output terminal Vout of the C converter 4
It is determined whether or not the relationship of Vcc ≧ Vok holds with k. Here, Vok is a voltage at which the CPU 1 can keep the operation until the next second interrupt processing.

If this # 69 is YES, the next # 7
When 0 is jumped to # 71, the step-up operation of the DC / DC converter 4 is stopped, the CPU 1 is returned to # 60, and the CPU 1 is put into the sleep state. Thereafter, the sleep state is set in the same manner as described above. If # 69 is NO, the following # 7
If it is YES at step 68, it is determined whether the elapsed time of the timer set at # 68 has expired. If YES, the process proceeds to step # 71 to stop the DC / DC converter 4, and so on. Processing is performed. # 70 N
In case of O, it returns to # 69 and Vcc ≧ Vok again.
The determination is made, and thereafter, the same processing is performed and the series of processing ends.

In # 69, the DC voltage is set to A /
Since the D value is converted into a digital value and the voltage is compared in this state, extra power is consumed during A / D conversion. Therefore, without checking the Vcc voltage, simply pass the DC / The DC converter 4 may be switched from on to off.

Next, the on / off control operation of the DC / DC converter 4 will be specifically described with reference to FIGS. 2 and 1.
When the voltage of the power supply battery 3 is supplied between the common end G and the power supply input end Vin, the input voltage is supplied to the power supply input end b via the coil L. At this time, the boosting / stabilizing circuit IC is C
When the control signal S1 sent from PU1 is received at the first control end d and is at the L level, the output that stabilizes the output by boosting the output is the power output end c (power output end Vou
t).

On the other hand, the control signal S1 to the first control terminal d is H
In the case of the level, the boosting action is stopped and a voltage obtained by stabilizing the voltage of the power supply battery 3 by the boosting / stabilizing circuit IC is generated at the power supply output end c (power supply output end Vout). This output voltage is supplied to the CPU 1. The output voltage of the DC / DC converter 4 is detected by the boosting / stabilizing circuit IC itself, and the detected output is generated at the second control end e, and CP
When the output voltage supplied to the reset terminal of U1 falls below a predetermined limit value, an L level is generated at the second control terminal e and the CPU1 is reset.

Further, since the series time constant circuit of the capacitor C3 and the resistor R1 is formed so that the time constant necessary for stabilizing the output of the step-up / stabilization circuit IC is formed, the second control is performed after the power is turned on. When the output of terminal e becomes H level, CP
U1 is released from the reset state and starts the program. When the CPU 1 is stopped or stopped, the boosting operation by the boosting / stabilizing circuit IC is stopped by setting the signal S1 supplied to the first control terminal d to the H level, and the voltage of the power supply battery 3 is boosted / stabilized. I circuit
A voltage stabilized by C is obtained at the power supply output terminal c.

Further, when the output of the DC / DC converter 4 is turned off based on the operation command from the CPU 1, the power supply output terminal Vout holds a predetermined voltage for a while due to the capacitance of the capacitors C1 and C2. Therefore, the CPU 1 can be surely operated. Therefore, the operation / non-operation (that is, the on / off operation) of the boosting function of the DC / DC converter 4 can be controlled from the CPU 1 side, and this CPU 1 issues a command to operate the DC / DC converter 4. When it is issued, the DC / DC converter 4 is turned on, and when the output voltage of the DC / DC converter 4 is supplied to the CPU 1, the output voltage is supplied to the CPU 1 at least until the reset operation is completed in the CPU. The period can be controlled to hold.

The control signal S1 supplied to the above-mentioned first control terminal d is the DC / DC converter 4 when it is at the L level.
Is made into an operating state, and is made into an inoperative state at the time of H level. Such a signal can be substituted (realized) by the following logic circuit, for example.

That is, an RS flip-flop circuit is provided, and its normal output terminal (so-called Q output terminal) is NPN.
Is connected to the connection point between the resistor R2 and the first control terminal d via a polarity reversing circuit using a type transistor, and the reset input terminal of the flip-flop circuit is connected to DC /
An OFF start command signal output end is connected so that the DC converter OFF start command signal can be supplied. Further, the output end of the DC / DC converter ON start command signal from the CPU 1 and the "resistor R1, capacitor C3, second control end e" Common connection point "
Are connected to each of the two input terminals of the 2-input type exclusive OR circuit, and the output terminal of the exclusive OR circuit is connected to the set input terminal of the RS flip-flop circuit.

When the ON start command signal is set to the H level by the CPU 1 when the reset signal (control signal S2) from the DC / DC converter is set to the L level, the output of the exclusive OR circuit at the H level becomes R. −
It is supplied to the set input terminal of the S-type flip-flop circuit,
The non-inverted output terminal becomes H level, the output of the first control terminal d becomes L level through the polarity inversion circuit by the transistor, and the boosting operation in the DC / DC converter 4 is started.

On the other hand, when the OFF start command signal is set to the H level by the CPU 1 to stop the DC / DC converter, the non-inverted output terminal of the RS flip-flop is inverted from the H level to the L level and the above-mentioned inversion is performed. The supply signal to the first control terminal d through the circuit is at H level, which causes DC /
The boosting operation of the DC converter 4 is stopped. In this way, it is possible to control ON / OFF of the boosting operation of the DC / DC converter 4 by the three kinds of signals of the ON / start signal, the OFF signal and the reset signal of the DC / DC converter.

[0113]

As described above, according to the first aspect of the present invention, the display of the focus point is made to appear when the distance measurement is completed, and the focus point is displayed between the focus drive and the film exposure. Since it is configured to be erased at the time point, even if the shutter release button is pressed at once from the first stroke to the second stroke, it is possible to extend the lens for focusing drive between the appearance and the disappearance of the display. Because it takes time,
As a result, the display time can be secured, and therefore, the photographer can clearly see the focus point without delaying the sequence accompanying the shooting by the camera, and especially the display reaction speed such as LCD is high. It is possible to provide a sequence control device for a camera that can surely confirm the display of the focus point even with a slow display element.

According to the invention of claim 2, the distance measuring frame display is made to appear when the exposure of the film is completed, and is erased when the distance measuring operation prior to photographing is completed, Since the film winding operation is interposed between the appearance and deletion of the ranging frame display, the ranging frame appearing time can be lengthened, thus delaying the original sequence accompanying the shooting operation of the camera. It is therefore possible to provide a sequence control device for a camera that allows a photographer to view the display without fail even when performing continuous shooting.

According to the third aspect of the present invention, the detection of the ON / OFF operating state of the matrix switch is performed by interrupting the CPU switch port when the matrix switch is OFF or the ON state is not maintained. On the other hand, the operation switch when the matrix switch is on or the on state is not maintained is C
Since it is configured to start from the stopped state or the hibernate state to the operating state by performing the timer interrupt to the PU port, the matrix switch detection becomes unnecessary when the CPU port is started by the interrupt. The operating time can be shortened and the power consumption can be reduced.

According to the invention of claim 4, the processing speed of the CPU for controlling the series of camera operations is set to be high in the operating state and set to be low in the resting state. In the operating state, the chattering state of the plurality of operation switches is detected every first set time, and when the CPU is interrupt-activated from the hibernate state or the stopped state, the chattering state is longer than the first set time. Since the chattering state is detected every 2 set times, the minimum required chattering state can be detected according to the processing speed of the CPU. The consumption can be reduced.

Further, according to the invention of claim 5, when the duration when the CPU is in the stopped state or the rest state or the duration when the temperature detecting means is in the non-operating state is a predetermined time or more, Since the data update means for using the temperature detection data obtained by the temperature detection means as update data is provided, there is no error component generated when the temperature detection means is operated for a long time, and a fresh temperature value is obtained. Therefore, accurate temperature compensation can be performed.

Further, in claim 6 of the present invention, CP
Non-operation obtained by measuring the duration when the operating state of U or the operating state of temperature detection is obtained, and by measuring the duration when the CPU is not operating or the non-operating state of temperature detection Compared with the time, the temperature detection data is configured to be updated data when the non-operation time exceeds a predetermined multiple of the operation time. An accurate temperature value can be obtained without causing an error component to occur, and therefore accurate temperature compensation can be performed.

According to claim 7 of the present invention, the CPU
When a command to reset the CPU is issued, the DC / DC converter is turned on and the CPU is set to the DC / D
Since the voltage holding means for supplying the output voltage of the C converter and holding the voltage supply at least until the reset operation is completed in the CPU is provided, DC /
In the case of a CPU such as this example that does not operate at the voltage (approximately battery voltage) when the DC converter is not operating, the CPU
When a command to reset itself is issued from C, the DC / DC converter is turned on, and C
The operating voltage to the PU is secured, the reset operation of the CPU is surely performed, and after the reset of the CPU is released, the DC / DC converter stably operates the CPU.
The operating voltage is supplied to the
Since it can be controlled from the U side and the DC / DC converter is not operated when it is in the dormant state or in the stopped state, the power consumption is greatly increased as compared with the one configured to always operate the DC / DC converter. You can save.

According to claim 8 of the present invention, DC /
The on / off operation of the DC converter is controlled from the CPU side, and when the CPU is in the stopped state or the idle state, the DC / DC converter is activated to be turned on by the instruction of the time interrupt processing, and the on state is set. Is configured to be provided with a control means for turning off the power supply for the next time until a command for interrupt processing is issued next time so as to obtain sufficient power supply for ensuring the operation of the CPU. Therefore, the cumulative power consumption can be reduced as much as possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an electric circuit of a camera to which a sequence control device for a camera according to an embodiment of the present invention is applied.

FIG. 2 is a circuit diagram showing details of the DC / DC converter shown in FIG.

FIG. 3 is a circuit diagram showing a detailed circuit of an operation switch group shown in FIG.

FIG. 4 is a perspective view showing an appearance of a camera according to an embodiment of the present invention.

5 is a plan view showing an example of a finder display LCD shown in FIG. 1. FIG.

FIG. 6 is a flowchart showing a timing operation of superimposing a distance measurement frame and a focus point on an observation image of a finder.

FIG. 7 is a time chart showing an operation corresponding to the flowchart shown in FIG.

FIG. 8 is a time chart showing a switch reading control state when the CPU is stopped.

FIG. 9 is a time chart showing a switch reading control state when the CPU is at rest.

FIG. 10 is a time chart showing (enlarged) a part of FIG. 9 in the time axis direction.

FIG. 11 is a time chart showing a switch read control state during operation of the CPU.

FIG. 12 is a time chart showing a part of FIG. 11 in a time axis direction.

FIG. 13 is a flowchart showing a main routine of operations such as detection of a group of operation switches formed in a matrix, detection of chattering, and temperature compensation.

FIG. 14 is a flowchart showing a timing operation of superimposing a range-finding frame and a display of a focusing point on an observation image of a finder.

FIG. 15 is a flowchart showing a key ON interrupt subroutine.

FIG. 16 is a flowchart showing a subroutine of port suspension setting.

FIG. 17 is a flowchart showing a subroutine of port stop setting.

FIG. 18 is a flowchart showing a subroutine of second interruption.

FIG. 19 is a flowchart showing a subroutine of regular interruption.

FIG. 20 is a flowchart showing a subroutine of port operation setting.

FIG. 21 is a flowchart showing a subroutine of external interruption.

FIG. 22 is a flowchart showing an example of a temperature reading subroutine.

FIG. 23 is a flowchart showing another example of a temperature reading subroutine.

FIG. 24 is a flowchart showing a main routine of an on / off control operation of the DC / DC converter.

FIG. 25 is a flowchart showing an example of a conventional camera sequence control device.

[Explanation of symbols]

 1 CPU 2 Interface IC 3 Power Battery 4 DC / DC Converter 5 Crystal Oscillator 6 Remote Controller IC 7 AEIC 8 AFIC 9 Date LED 10 Strobe 11 External LCD 12 Operation Switch Group 13 Finder Display LCD 14, 22, 25, 27 Driver 15 EEPROM 16 External Device Connection 21 Constant Voltage Control Tr 23 Zoom Motor 26 Shutter 24 Feed Motor 28 Lamp 29 Position Detection Circuit 30 Film Sensitivity Detection Circuit 31 Constant Voltage Driver 32 Pulse Motor 33 Display LED 50 Camera Main Body 51 Shutter Release Button 52 Zoom Lever 53 strobe mode setting button 54 date mode setting button 55 drive mode setting button 56 shooting mode setting button 57 rewind manual setting switch 58 back cover open / close detection switch 60, 63, 64, 6,67-focus point display 61 center distance measurement range display 62 wide ranging range display 65 telephoto ranging range display 68 panorama mask L coil D diodes C1, C2, C3 capacitors R1, R2 resistor

Claims (8)

[Claims] 1. A focusing point display is superimposed on a viewfinder for observing a shooting screen, and when the shutter release button is pressed up to the first stroke, distance measurement for automatic focusing is started, In a sequence control device for a camera in which film exposure is started when the shutter release button is located at the second stroke, which is further pressed than the first stroke, the shutter release button is pressed to the first stroke. After that, when the distance measurement is completed, the focus point is displayed on the viewfinder, the shutter release button is pressed to the second stroke, and the focus driving is performed. Focus point display system that erases the focus point display on the viewfinder before the film is exposed after the lens is extended. Sequence control device for a camera, characterized in that a means. 2. A distance measuring frame display is superimposed on a viewfinder for observing a shooting screen, and when the shutter release button is pressed up to the first stroke, distance measuring for automatic focusing is started. In a sequence control device for a camera in which film exposure is started when the shutter release button is located at the second stroke, which is further pressed than the first stroke, the shutter release button is pressed to the first stroke, Then, when the distance measurement is completed, the distance measurement frame display already displayed on the viewfinder before the shutter release button is pressed is erased, and the shutter release button is changed to the second mode. The finder is pressed to the stroke, and after the film exposure is completed and before the film is fed, the finder is measured. Camera sequence control apparatus characterized in that a distance measurement frame display control means for revealing the frame display. 3. A series of camera operations are performed under the control of a CPU, and the CPU takes three operating states of stop / hibernation / operation and is activated from the hibernation state or the hibernation state to the operation state. In a camera sequence controller in which the ON / OFF operation states of a plurality of operation switches formed as matrix switches are detected by the CPU, the matrix switch detects the ON / OFF operation states of the matrix switches. When the switch is off or the on state is not maintained, the operation switch is selected by interrupting the port of the CPU, and when the matrix switch is on or the switch that is kept on is the CPU. The boot selection means to choose to do with a timer interrupt to the port Only, the sequence control device for a camera, characterized by being configured to alter the startup process by the state of the matrix switch. 4. A series of camera operations are performed under the control of a CPU, and the CPU takes three states of a stopped state / a rest state / an operating state, and operates at a predetermined processing speed in the operating state. In the sequence control device of the camera which is operated at a speed slower than the predetermined processing speed in the idle state, the chattering state of the plurality of operation switches formed as the matrix switch is set when the CPU is in the operating state. The detection is performed every first set time, and when the CPU is interrupted and activated from the hibernation state or the stopped state, the chattering state is detected every second set time longer than the first set time. A sequence control device for a camera, which is controlled. 5. A series of camera operations are performed under the control of the CPU, the CPU has three operating states of stop / pause / operation, and the temperature detection means detects the temperature at a plurality of time points. In a sequence control device for a camera that controls the temperature of a CPU or temperature-compensates a controlled object based on temperature compensation data obtained by sequentially updating data, a duration time when the CPU is in a stopped state or a rest state, Alternatively, when the temperature detecting means is in a non-operating state and the duration is equal to or more than a predetermined time, the temperature detecting means has a data updating means for using the temperature detection data obtained by the temperature detecting means as update data. Sequence control device for camera. 6. A series of camera operations are performed under the control of a CPU, the CPU takes three operating states of stop / pause / operation, and temperature detection is performed by a temperature detecting means at a plurality of time points. In a sequence control device of a camera for performing control by the CPU or temperature compensation of a controlled object based on temperature compensation data obtained by sequentially updating data, when the CPU is in an operating state or the temperature detecting means operates. Continuous time measuring means for detecting an operating time of which a continuous time is measured, and a non-operating time of which a continuous time is measured when the CPU is in the non-operating state or the temperature detecting means is in the non-operating state. Comparing the operating time and the non-operating time obtained by the duration measuring means, the non-operating time exceeds a predetermined multiple of the operating time. Camera sequence control apparatus further comprising a data updating means for the obtained temperature detection data update data by the temperature detecting means when. 7. A series of camera operations are performed under the control of a CPU, and the CPU takes three states of a stopped state / a rest state / an operating state, and a DC / DC converter boosts the voltage of a power supply battery. In a sequence control device for a camera that secures the operating voltage of the CPU, the on / off operation of the DC / DC converter is performed by the C
When a control means for controlling from the PU side and a command to reset the CPU are issued, the DC / DC converter is turned on, and the CP
Power supply control means for supplying the output voltage of the DC / DC converter to U and supply of the output voltage to the CPU by the power supply control means are held at least until the reset operation is completed in the CPU. A sequence control device for a camera, comprising: a voltage holding unit. 8. A series of camera operations are performed under the control of a CPU, and the CPU takes three states of a stopped state / a rest state / operating state, and a DC / DC converter for boosting the voltage of a power supply battery. In a sequence control device for a camera that secures the operating voltage of the CPU, the on / off operation of the DC / DC converter is performed by the C
While controlling from the PU side, when the CPU is in the stopped state or the idle state, the DC / DC converter is activated by a timer interrupt processing instruction, and this ON state is activated by the next time interrupt processing instruction. A sequence control device for a camera, comprising control means for turning the power off after continuing so that a sufficient power supply can be obtained to secure the operation of the CPU until the power is output.