JPS62227133A - Film rewinding device for camera - Google Patents

Abstract

PURPOSE:To allow a user to select whether the leader part of a film is left outside or take up into a film cartridge by selecting the 1st or the 2nd mode at a specific period in film rewinding operation. CONSTITUTION:If the film falls off a spool shaft during the rewinding operation, a switch SWsls for film detection turns off, so a switch SWiso associated with an ISO key is checked. When the ISO key is pressed and the switch SWiso is on, the rotation of a motor M2 242 is stopped instantaneously. Namely, when the film leader part is left outside the cartridge, the ISO key is only pressed during the film rewinding operation (when the switch SWsls is turned on) and when the film leader part is wound into the cartridge, the rewinding operation is only carried out without pressing the ISO key.

Description

[Detailed description of the invention] 111 animals 1 The present invention relates to a film rewinding device for a camera.

In conventional cameras, when rewinding the film, there are two types: one that rolls the film leader into the film container, and the other that leaves the film leader outside of the film container. There is a type that ends rewinding, and it is difficult to say which one is better because it depends on the individual user's preference.

However, conventional cameras, especially cameras equipped with an automatic film rewinding device using a motor, are fixed to one of these types, which leaves users dissatisfied.

In addition, when testing film winding and rewinding many times during camera manufacturing, if the film leader section is rolled into the film container, the film container must be opened and the leader section taken out each time. Bad sex.

(The following is a blank space) Inu'l Kai Hereinafter, embodiments of the present invention will be explained in detail based on the drawings.

First, Fig. 1 is a top view showing the external appearance of a camera according to an embodiment of the present invention, and Fig. 2 is a front view thereof, and these show operating members, display members, etc. related to the present invention. be. In FIGS. 1 and 2, a display section (600) is arranged on the top surface of the camera body (1).
600) displays various information in a concentrated manner, such as a photographing mode (1), a 7-frame cut value, a film sensitivity value, a battery depletion warning, and a film feeding status. This display section (600) consists of a liquid crystal display panel.

(820) is a main switch that can be slid forward and backward on the camera body (1), and when set to the "LOCK" position, all camera circuits described below become inoperable, and when set to the "ON" position, conversely. Normal operation becomes possible. (
800) is the shutter button, and when it is pushed halfway through its stroke, the photometering switch (SW, ) described later is closed and the photometry circuit, etc. described later, starts operating, and when it is pushed further to the end, the release switch (described later) is closed. (SW2) is closed and the shutter is released.

Reference numeral 804 is a photographing mode switching key, which allows program mode and manual mode to be alternately selected each time the key is pressed - times. (803) is the ISO key, and when this key (803) is pressed, the film sensitivity value (ISO value) currently set in the camera will be displayed on the display (6
00) is called and displayed above.

(805), (806), (807), and (808) are 7 keys A, 7 keys, A, UP key B, and DOWN key B, which are used to change camera settings.

For example, if you press the 7 key A (805) or the down key A (806) while pressing the ISO key (803), the ISO value displayed on the display g (600) will change in the specified direction, and the ISO value will change. You can change the value settings. Also, if you press the 7-up key A (805) or the down key A (806) while the shooting mode key (804) is set to manual mode, the shutter button displayed on the display section (700) in the viewfinder (described later) will be displayed. You can change the speed value and set it to your favorite shutter speed value. Similarly, in manual mode, if you press the 7 key B (807) or the down key B (808), the aperture value displayed on the display section (700) in the 7 finder will change, allowing you to set it to your preferred aperture value. I can do it. (
811) is a rewind switch operated when rewinding the film.

FIG. 3 is a block diagram showing the circuit configuration of this embodiment. In Figure 3, (100) is the main power battery of the camera, (110) is the power circuit connected to the main power battery (100), and (120) is the battery that checks the voltage of the main power battery (100). This is a check circuit. Here, the power supply circuit (110) receives Vdd from the main power supply battery (100),
, the voltage Vct and the voltage Vdd are made constant, respectively, and the power is supplied to each circuit described below. Then, the output voltages Vec, Vd of this power supply circuit (110)-
d, the output voltage Vcc can be controlled by a signal input to the input terminal (111) of the power supply circuit (110), and the input signal of the input terminal (111) is set to "H".
When the input terminal (111) is set to the "high" level, the output voltage Vcc is cut off, and when the input terminal (111) is set to the "low" level, the output voltage Vcc is output.

Note that the output voltage Vdd is always output. The battery check circuit (120) checks the output voltage V dd of the main power battery (100) when the voltage Vcc is output,
) is constantly monitored, and this output voltage Vdd.

outputs a signal indicating the battery status according to the voltage level of the battery.

(200) is a control circuit (hereinafter referred to as control CPU) that controls the sea fence of the camera body, and all open circuits described below operate under instructions from the control CPU (200). <210) is a photometric circuit, and TT
The photometric charge conversion amount (corresponding to the subject brightness value) by the photometric element (211) that performs L photometry is AD converted to obtain the subject brightness Bv.
This information is sent to the control CPU (200).

(220) is an aperture control circuit, and control CPU (200)
) controls the aperture (F number) of the photographic lens. (230) is a shutter control circuit, and control CP
The running timing of the leading and trailing curtains of the shutter is controlled based on commands of shutter speed information from U (200).

Furthermore, (240) is a motor drive circuit, and a control CPU
Motor M by command from (200).

(241) and motor M2 (242), respectively. Here, the motor M (241) is used for both the driving operation at the time of the shirt-tall release to raise the main mirror of the 7-rex camera and the film winding operation, and its forward rotation operates the shirt-tall release operation, and its reverse rotation operates the shirt-tall release operation, and the motor M (241) A winding operation is performed. On the other hand, Sota M, (242)
is the film rewind motor with 8 tears, and this motor M2
When (242) is driven, the winding motor M, (2
41) drive system is clutch 8! The mechanism automatically releases the film from the film and rewinds the film.Here, we will explain about the mechanism that performs the shirt release operation, the film winding operation, and the film rewinding operation by the motor. Since this is already a known technique and is not a part of the present invention, it will not be described in detail.

(250) is a contact point provided on the film cartridge for detecting a DX needle indicating film sensitivity;
Through this contact (250), the control CPU (200) reads the film sensitivity value (ISO value) coated on the surface of the film cartridge.

(260) is an oscillation circuit that supplies a reference clock to the control CPU (200). Here, the control CPU (200
) requires high frequency control, as it is necessary to control various camera operations with high time precision! (for example, 4.19 MHz) is used as the oscillation circuit (260).

(261) is a reset capacitor for the control CPU (200), which resets the IC'P U (200) when the power battery (100) is loaded into the camera. (262) is a capacitor for resetting the control CPU (200). ). (270) is the lens data built in the photographic lens attached to the camera body (1), which outputs various data such as the open aperture value, maximum aperture value, and focal length of the photographic lens. This is an output circuit.

Furthermore, (280) is an IC for data memory, and this Memo+7 IC is equipped with a backup battery (290) consisting of a lithium battery so that the stored data will not be erased due to a voltage drop in the power supply battery (100). is constantly backed up. This memory IC (280) is RAM (Random Access Memo).
ry), and the frame count value is written in and read out from the control CPU (200) as necessary. That is, in this embodiment, the control CPU (20
The memory in 0) cannot store data when the main power battery (100) is exhausted or removed, so data that should not be erased (for example, frame count value) is stored in this memory IC (213Q). This is why I store it and back it up with another battery (290).

Reference numeral 500 denotes a display circuit for driving the display section of the camera, and is formed by, for example, a 4-bit microcomputer with a liquid crystal display drive circuit. (600) is the camera body (1
(700) is a display section consisting of a liquid crystal display panel provided on the upper surface of the screen, and (700) is a display section consisting of a liquid crystal display panel provided inside the facing. (510) is a bias circuit that generates a bias voltage for driving the liquid crystal, and this circuit (510)
10) is supplied to the display circuit' (500), and inside the display circuit (500), the image display section (600) (7
00) are synthesized.

(S W, ) (S W2) are switches that are linked to the camera's shirt release button (800), respectively.
When the photographer presses the shirt release button (SOO) halfway, the metering switch (S W +) turns on and metering starts as described below, and then the shirt release button (8
00) all the way, the relay X switch (SW2
) is turned ON and the release is performed @
(SWiso) is a switch linked to the rso key (803), and when the ISO key (803) is pressed, the switch (SWiso) is
When SWiso) is turned on, only during that time, the ISO value (film sensitivity value) set inside the camera is called up and displayed on the display section (600) on the body.

(SWmod) is a mode switch that is linked to the mode key (804), and in this embodiment, this mode key (80
4) Each time the button is pressed, program mode and manual mode are alternately set as the exposure control mode. (SWua) is up key A (805
), and (SWcla) is a switch that is linked to the down key A (806). In this embodiment, l5O4-(803
) While calling up the ISO value, press the up key A (805) to increase the ISO setting value, and press the town key A (806) to decrease the ISO value. can be changed to On the other hand, when the exposure control mode is manual mode, the shutter speed setting value can be increased or decreased by operating the main up key (805) and down key (806). Furthermore, (SWub) is the up key B (807
)l: Linked X+, (S Wdb)li This is a switch linked to Town key B (808). These keys are used to increase or decrease the aperture setting when the exposure control mode is in manual mode.

(SWsls) is a film detection switch installed on the film winding spool shaft of the camera, and when the film is not wound normally on the spool, the closed switch 11 (
ON), and when it is wound normally, the closed state fi (OFF
). (SWrew) is the film rewind switch, and when loading the film, this switch (SWrew)
When turned on, rewinding is automatically performed. (SWrc) is a switch that is linked to opening and closing of the back cover of the camera, and when the back cover is closed, the switch (SWrc)
is rFI (ON), and when the back cover is opened, the switch (SWrc
) becomes 1 (OFF).

(SWsp) is a switch that opens and closes in conjunction with the rotation of the film rewinding shaft, and for example, opens and closes once when the rewinding shaft is rotated half a turn.

Here, among the above-mentioned switches, (SWI) (S W
2) (S W 1so) (S W mod) (S Wua
)(S Wda)(S Wub)(S Wdb)(S
Each signal generated by the operation of (Wrew) and (SWrc) can activate the control CPU (200). That is, when signals from these switches are input while the control CPU (200) is in the standby state, the control CPU (200) escapes from the standby state, enters the normal operating state, and performs processing corresponding to each input signal. It is now possible to do this. The operation of the control CPU (200) at this time will be described later. Furthermore, (SWIa) is a switch linked to the main switch (820) of the camera, and this switch (SWm) is closed! ? ! ! (OFF), the camera is locked, and in the closed state (ON), the camera is protected from operation.

(SOO) is a display circuit, and in this embodiment a 4-bit microcomputer is used. And control CPt
Data communication between J (200) and the display circuit (500) uses a serial data communication method using a pass line (300). Here, the pass line (300) includes a signal line (301) that transmits a serial clock signal (Sck), a signal line (302) that transmits a serial data signal (Sout), and a display circuit selection signal (C8D).
It consists of signal lines <303) that transmit SP).

Then, from the control CPU (200) to the display circuit (SOO)
When the control CPU (200) wants to transmit data to the serial clock signal ( The serial data signal (Sout) is sent to the display circuit (SOO) by a predetermined number of bits (number of bytes) in synchronization with Sck). Here, a signal line (303) transmitting the display circuit selection signal (C8DSP) is connected to an external interrupt terminal (INT) of the display circuit (500). Therefore, when the signal line (303) switches from "H" to "L", the display circuit (500) is interrupted, and the display circuit (SOO) is interrupted.
is configured so that it can know that serial data is being transmitted from the control CPU (200). (
501 and 502 are a power supply terminal and a ground terminal of the display circuit (500), respectively.

(503) is a reference clock generation circuit that generates a reference clock for driving the display circuit (500), and its oscillation frequency is as high as necessary and sufficient for display data processing and one display response (for example, 32. 7[)5KH2) to reduce power consumption. (504) is a display circuit (
This is a capacitor for power reset of SOO). (5
10) is a bias circuit that supplies a bias voltage for liquid crystal display to the display circuit (500), as described above.

Furthermore, (530) is a signal line that transmits four common signals for driving the image display units (600) and (700), and (541), (542), and (S43) are segment lines that transmit segment signals. It is a signal line. These segment signal lines (541) (542) (543
), the signal line (541) is wired only to the display section (600), the signal line (542) is wired only to the display section (700), and the signal line (543) is wired only to the display section (700). are commonly wired to the image display sections (600) and (700) (the liquid crystal drive method in this example is 1).
(This will be explained using the /4 duty and 1/3 bias method as an example).

Figures 4 and 5 show specific examples of the display mode of the display section of this camera.
00), and FIG. 5 shows the display mode of the display section (700) provided in the 7-ring.

First, the display elements of the display section (eoo) on the top surface of the main body will be explained. In FIG. 4, (601) and (602) indicate the exposure control mode of the camera, and when the camera is set to program mode, the display element (601)
When the manual mode is set, the display element (602) lights up and "M" is displayed.
” is displayed.

(611), (612), and (613) are display elements for instructing the photographer on necessary operations regarding film loading and rewinding.When no film is loaded, the display elements (611)
and the display element (612) light up at the same time, indicating "LOAD".
FIT. The camera will then instruct you on how to finish shooting and rewind. Further, in a normal photographing state, only the display element (612) is lit and displayed, and together with the 7-frame counter display numbers (631) and (632) a31, constitutes a 7-frame counter.

(615) is a display element that shows the status of the camera's main power battery (100), and when there is enough battery power remaining, the light is off, and when the battery is exhausted and enters the warning 1 castle, for example
This is displayed blinking at z.

(631), (f332), and (633) are number display elements each composed of seven segments, and (f334) is a display element that displays the number "O" with a single electrode. In this way, display elements (631) (632) (
633) and (634) constitute four-digit numbers, and the same segment is used to switch and display a plurality of types or more as follows.

That is, first, the count value of a 7-frame counter is displayed on the first two digits of the display elements (631 and 632), forming a frame counter together with the above-mentioned "FILM" display element (612). Furthermore, the second is an ISO" mark display element (614) and a number display element (631) (632) (
633) (634) and the film sensitivity (
ISO value). Furthermore, using this numerical display,
It is also possible to display the elapsed time (in seconds) during pulp exposure and the time measurement (in seconds) during self-timer photography.

Further, (622) is a display element indicating the winding direction, and (623) is a display element indicating the rewinding direction. During the winding operation after shirt release, this display element (6
22) lights up to indicate that the winding operation is progressing normally. Also, when the film loaded in the camera has finished taking all the pictures and starts winding, the film will be in a tight state, but at this time, the winding direction display element (6
22) and the aforementioned display elements (612) and (613) displaying "FILM END" flash simultaneously at, for example, 2 Hz to indicate the end of the film. Also, during rewinding of the film, the rewinding direction display element (623) displays, for example, 2. The display blinks at Hz to indicate that rewinding is progressing normally.

Also, (621) is the patrone mark, (624) is the film set mark, (625) (626) (627)
is a film unwinding remaining amount display layer bar display element. The film is now correctly loaded in the camera. If the film is loaded correctly, the cartridge mark (621) and film center mark (624) will light up, but if the film is not loaded correctly, both marks (621) (62) will light up.
4) is not displayed.

On the other hand, 81 shown in the tpJ1 diagram is used for film rewinding.
When the rewind switch (811) is operated four times, in addition to the cartridge mark (621) and film center mark (624), a bar display element (625) for displaying the remaining amount of film rewinding is displayed.
626) and (627) are newly added and displayed, and the initial state of rewind display is entered. At this time (1324) (625)
The four bar display elements (626) and (627) graphically represent the length equivalent to the total length of the film to be rewound, and as the rewinding progresses, approximately 1/1/2 of the total length of the film is rewound. Display element (627) (62G
) (625), the bar display is extinguished one after another, and when the reversing of all the films 8 is finally completed, the motor is stopped and the bar display element (624) is extinguished, completing the rewinding. Therefore, when rewinding is completed, only the patrone mark (621) remains. In addition, during rewinding display, displays other than rewinding (mode display, 7 frame counter 'IP')
) may also be displayed twice at the same time, but in order to make the above-mentioned rewind bar graph display stand out, it is preferable to erase everything except the rewind bar graph display. Further, in this embodiment, the bar display element is turned off every approximately 174 times during the entire stroke, but the present invention is not limited to this.

Next, the display elements of the internal display section (700) will be explained using FIG. In FIG. 5, (701
) (702) is a display element that displays the exposure control mode of the camera, and when the camera is set to program mode, the display element (701) lights up and P'' is displayed.
When set to manual mode, the display element (70
2) lights up and M'' is displayed. (711) (71
2>(713) and (714) are numerical display elements constituting a four-digit number, and are used to display the shutter speed.

Numeral display elements (721) and (722') indicate two-digit numbers, and together with the decimal point display element (723), display the aperture value. Furthermore, (731) and (732) are indicators that display whether the photometric value is under, appropriate, or over the set value when the exposure control mode is manual mode. (733) is a battery mark, similar to the battery mark (615) in Figure 4, which indicates the status of the main 1rA battery (100) of the power/vehicle, and turns off when there is sufficient battery power. When the battery is exhausted and enters the warning area, the display will blink at IHz, for example.

Furthermore, among the above-mentioned display elements, the display element (601) that displays "PROGRAM" and "
The display element (701) that displays P'', the display elements (602) and (702) that each display M'', and the two battery marks (615H733) are connected in parallel from the display circuit (500) by the same drive signal. branch drive.

Here, in this example, the blinking period of the display element is
The battery mark (615) (733) blinks at IHz, and other display elements blink at 2H.
It is set as z. This is a consideration for the battery consumption warning display at low temperatures. In other words, the response speed of the liquid crystal decreases at low temperatures, making it more difficult to display flashing images at high speeds as the temperature gets lower.However, battery performance also decreases at low temperatures, making it more likely that you will be reluctant to check your battery than at room temperature. Therefore, in this embodiment, only the blinking period of the battery mark (615) (733) is made longer than the blinking period of the other display elements so that the blinking display of the battery exhaustion warning can be clearly recognized even at low temperatures. are doing.

Next, the contents of the serial data sent from the control CPU (200) to the display circuit (SOO>) using the serial data pass line (300) will be explained.Table 1 shows the contents of the serial data. This is an example.

(Left below) Table 1 Table 1 shows an example of the contents of serial data.
A series of serial data strings from the first byte to the fifth byte constitute one communication from the control CPU (200) to the display circuit (SOO), and the meaning of each bit is determined in advance. As shown in Table 1, the upper 5 bits (b, , ~b1□) of the first byte of this serial data indicate the aperture display information (Av value), and the 4 bits of the integer part ()
+, , -b, , ) and 2 bits of decimal part (b13 to b1□)
It has a display resolution of 1/4 Av. this! Lower 2 bits of ml byte (b++=b,.)
is the over-under indicator (7
31) (732), when b, , = 1, the display element (731) is turned on, and when b1o = 1, the display element (732) is displayed.

Furthermore, the top 5 pits of the 2nd byte) (bzt~b22)
indicates shutter speed display information i1 (Tv value), which includes 4 bits of the integer part (b27 to b2.) and 2 bits of the decimal part (b2.
□b22) and has a display resolution of 1/4 Tv unit. (lower 2 bits of this second byte)
(b2., b2.) is battery check information. b
YO is a battery exhaustion warning flag, and when +121=1, battery marks (615) (733) are displayed blinking to prompt battery replacement. b22 is a flag indicating the operation limit determination result, and when lJ2□=1, all display elements are turned off to indicate that the camera cannot guarantee operation due to battery exhaustion.

The third part-time job is about film sensitivity! [(Sv value) is shown.

The most significant bit of this third byte (y) (b3t) is the ISO
This is a display command, and when b, , = 1, ISO is given priority.
Display the value. (lower 7 bits) (b3i to b1.) indicates film sensitivity (Sv value), integer part 5 bits) Cbs
It consists of s to b, 2) and the decimal part 2 vias) (b3°b3°), and has a display resolution in units of 1/4Sv.

The most significant bit (b47) of the fourth byte is information regarding the exposure control mode; when b, . . . =o, it is program mode, and when b, 7 = 1, it is manual mode. The lower two bits of the 4th byte) (b,,.

1) and o) are information regarding the drive state of the motor. b<zb+. When =00, the motor is off and is not doing any work.el)4+11)4°When =01, the motor is winding the film. When b411b4°=11, it indicates that during the film winding operation by the motor 1, winding is not completed within a predetermined time, that is, when all frames of the film that can be photographed have been wound. Furthermore, b
When 411b4°=10, it indicates that the 7 frame 8 return operation is in progress.

Furthermore, the lower 6 bits of the 5th byte of serial data) (
bss to bso) indicates a 7-frame counter value and is binary code data.

Next, FIGS. 6 to 12 show flowcharts illustrating the sea fencing of the control CPU (200).

First, FIG. 6 is a power-on reset routine showing the operation of the control CPU (200) when the main power battery (100) is attached to the camera. In FIG. 6, the control CPU (200) initializes all I10 ports in step C100, and then initializes the RAM in step ClO2.

This RAM includes not only RAM for normal data memory but also a serial data register for serial communication, a flag recorder, etc. In the primary stage, the film loaded in the camera through the DX contact (25,0) at step ClO4 The DX code is read in, and in step C106, the film sensitivity information therein is converted into ISO value data and set in the serial data register.

Next, in step C-flo, the film detection switch (S
Wsls) is OFF, that is, if the film is normally loaded, the process advances to step C112, reads the frame count value stored in the memory IC (280), and reads out the frame count value stored in the memory IC (280). Store in. On the other hand, if the film detection switch (SWsls) is ON in step C110, that is, the film is not loaded normally, the frame count value (bss''-b, o) of the serial register is cleared in step Cl2O, and in step C122 A 7 frame count value "0" is written to the memory IC (280). After step C112 or step C122 is executed, the process proceeds to step C130, and after some waiting time (for example, SOO
ωsec), the contents of the serial register are transmitted to the display circuit (500) via the serial data bus (300) in step C132, and then the standby state is entered.

By the way, as mentioned above, the reference clock frequency of the control CPt1 (200), which requires high-speed processing capability, is high (for example, 4.19 MHz), and the clock frequency of the display circuit (SOO), which does not require so high speed, is low (for example, 32 MHz).
, 768 KHz), so even if the voltage (VdcL) is simultaneously supplied to both circuits (200) and (500) by loading the battery (100), the timing at which the program starts due to power-on reset is different. In other words, in general, the faster the control CPU (200), the faster the clock oscillation is and the more stable the power-on reset is applied and the program execution starts, whereas at that timing the display circuit (200)
The oscillation circuit (503) of 500) has not yet stably oscillated, and therefore the program of the display circuit (SOO) may not have started to be executed. Also, both circuits (200) (5
Even if it is assumed that the CPU 00) starts executing the program at the same time, the execution time per instruction is different, so the display circuit (500) finishes the initial processing by power-on reset only when the control CPU (200) It is normal that there is a considerable delay compared to Therefore, the control CPU (2
00) provides a waiting time in step C130 of its power-on reset routine, and displays the display circuit (500).
By transmitting serial data after the initial processing has been completed and the system is ready to accept serial data, consideration is given to ensuring that a normal display is displayed when the battery is installed.

Furthermore, the control cP U (200) can be activated from the standby state when there is an interrupt input by an external activation signal. (
SW, ), release switch (SWa), ISO key (
803), a switch (SWiso) that is linked to the mode key (804), a switch (SWIIlod) that is linked to the mode key (804),
Up/down keys A, B (805) (806) (80
7) Switches (S Wu
a) (S Wda) (S Wub) C3Wdb), switch / switch (SWr) linked to the rewind switch (811)
ew), switch linked to opening and closing of the camera back (SWrc),
and a switch (S) linked to the main switch (820).
The signals from each of W+o) correspond to this activation signal.

FIG. 7 shows how the control CPU (2) is controlled by the various activation signals mentioned above.
00) is activated from standby state. In FIG. 7, first, in step C200, the input terminal (111) of the power supply circuit (110) is
By setting the voltage to Lo-level, the power supply voltage Vcc is supplied and the battery check circuit (120) is also activated.

Next, in step C202, switch the camera back switch (SWrc).
The information is read, and it is checked whether this interrupt activation was caused by closing the back cover. If the interrupt activation was caused by the back M ejection, the process goes to step 0280, and is executed by subroutine "5UB-C4", which will be described later. In this initial loading process, the film is automatically advanced by 4 frames and then stopped (subroutine "5").
(The UB-C4'' will be described in detail later.) After completing the initial loading process in step 0280, the power supply voltage Vcc is turned off in step 0282 to enter a standby state.

If it is determined in step C202 that the activation is not due to the arrow on the camera back, the process moves to step C2O4, and it is checked whether the activation is due to the rewind switch (SWre).If the activation is not due to rewinding, step 020
Proceed to step 6 and activate the photometric circuit (210) to obtain the photometric value A.
D conversion is started, and in step C208 the photometry circuit (21
0) becomes stable, in step C210, photometric value data is fetched from the photometric circuit (210) and lens data is fetched from the lens data circuit (270). Then, in step C212, exposure calculation is performed based on the captured data, and the obtained aperture value (Av value) and shutter speed value (Tv value) are written to the serial register, and in step C214, the display circuit (500)
Serial data transmission of Av value and Tv value is performed.

Next, in step 0216, release switch (SW2) is pressed.
Check whether the release switch (SW2) is turned on, and if it is not turned on, proceed to step 0218, and if it is turned on, proceed to step C240.Here, if the release switch (SW2) is not turned on, proceed to step C240. Step C2
In Step 18, it is checked whether the photometry switch (SW, ) is turned on, and if it is turned on, the process advances to Step C220, where all operation switches and keys of the camera are scanned. If so, the corresponding process is performed and the process returns to step C210.

Here, the details of the scanning routine of step C220 are explained in the ninth section.
This will be explained later using figures.

In FIG. 7, while the photometry switch (SW, ) is ON, steps 0210-0216-C218-C2
2O-C210 (hereinafter referred to as the photometry loop), but when the photometry switch (SWI) is turned off with the steno knob C218, the program advances to step C230, stops the photometry operation, and returns to step C23.
After turning off the power supply voltage Vcc in step 2, the device enters a standby state.

On the other hand, when it is detected that the release switch (SW2) is turned on in step 0216 during the photometry loop, the process exits from the photometry loop to step C240, and all serial data held at that point is used for final exposure control. Send it back to the display circuit (SOO) as data, step C24
2 is motor M.

(241) is rotated forward to start the release operation.

First, in step C242, the main mirror (not shown) starts to rise due to normal rotation of the motor M (241), and at the same time, in step C244, the fringe is removed up to the aperture value (Av value) obtained by exposure calculation. First, when the control operation for narrowing down the narrowing is executed, in step C246, the state of a switch (not shown) for detecting the completion of the main mirror's ascent is checked, and the system waits through the loop of step C246 until the ascent is completed.
Then, when the raising of the main mirror is completed, step 024
8, the rotation of the motor M (241) is stopped, and in step C250, the actual shutter speed control time value is calculated from the shutter speed value (Tv value) obtained by the exposure calculation in step C212, and in step C252, the shutter speed control time value is calculated. According to the time, the leading and trailing curtains of the 7-ocal plane shutter are controlled and the shutter control operation is performed.Next, in step C254, there is a slight waiting time (for example, 20 m5ec).
After taking the subroutine "5U" in step C256,
Details of the operation of the subroutine "5UB-C2" which processes the film winding operation from B-C2"l will be described later. When the film winding operation is completed in step 0256, the process jumps to step C210 again and returns to the photometry loop.

By the way, in step C2O4, the rewind switch (SW
If it is determined that the activation is due to re-, jump to step C290 and execute the rewind subroutine "5UB".
After executing the film rewinding control operation in step C3'', the power supply voltage Vcc is turned off in step C292 to enter standby.The details of the rewinding subroutine ``5UB-C3'' in step C290 will be described later.

FIG. 8 is a flowchart showing the battery check routine. The battery check circuit (120) has two determination levels, and sends a battery check signal to the control CPU (200) by comparing the output voltage V dd of the main power source battery (100) with these two levels. ing. Of these two determination levels, the higher determination level is a battery consumption warning determination level, and the lower determination level is a determination level as to whether or not it is necessary to lock camera operation. Then, even when the output voltage Vdd of the battery (100) crosses any judgment level,
Puffing check circuit (120) and control CPU (20)
A pulse signal is sent to the external interrupt terminal of 0). And at the same time as this pulse signal is output? The IJ determination results are controlled in parallel by the CPU.

(200).

In FIG. 8, when an external interrupt from the battery check circuit (120) occurs in the control CPU (200), first, in step C300, it is checked whether the main power battery (ioo) is extremely exhausted, and the camera is If the operation must be locked, go to step C310 and initialize all boats to stop the camera operation, and then turn off the electric voltage Vcc in step C312.
0 Next, in step C314, lock display information is set in the serial register (b21=1.b2°=0), and in step 0316, serial data is transmitted to the display circuit (SOO) (and the display is performed as described later). circuit(
SOO) receives this signal and lights up all r#i displays).

Next, in step 0318, the frame count value (b3. to b, .) of the serial register held at that time is loaded into the memory IC (280), and then the standby state is entered.

On the other hand, if it is determined in step C300 that the locked state has not yet been achieved, the process advances to step C302, where battery consumption warning display information is set in the serial register (b21=1.b2°=0). Then, in step C304, serial data is transmitted to the display circuit (SOO) and the process returns. As mentioned above, the main power battery (10
0) is subjected to interrupt processing, so that information is immediately transmitted to the display circuit (500) no matter what other processing is being performed. In addition, when the lock state is reached due to battery consumption, the current 7 frame count value is written to the memory IC (2B□) in step C318, so even if the main layer vi and battery (100) are replaced, the count will still be counted. The frame count value is never lost.

Note that when a battery exhaustion warning is issued, the user may immediately replace the battery, but in order to respond to such cases, the memory IC is also reset when entering the warning routine.
The 7 frame count value may be written in (280). Furthermore, one may be written into the memory IC (280) every time the frame count value is incremented.

FIG. 9 shows the control C shown in step C220 in FIG.
PU (200) key scanning subroutine “5UB-C1
19, the state of the switch (SWiso) linked to the ISO key (803) is checked in step C3100, and the ISO
If the key (803) is not pressed, step C3
Moving to 102, the ISO display command in the serial register (
bs□), and then clear the switch (SWmod) linked to the shooting mode key (804) in step C3104
) status. Then, press the 4I shadow mode key (
804) is pressed, the exposure control mode is to be changed, so proceed to step CSIIO to refer to the currently set exposure control mode, and if the current mode is program mode, proceed to step C5112. The mode is reset to manual mode and the process jumps to step C8120. If the current mode is the manual mode, the program mode is reset to step C3114 and the process jumps to step C3150.

On the other hand, in step C3104, the shooting mode key (804) is pressed.
If has not been pressed, the currently set shooting mode is referred to in step C3106, and if the current exposure control mode is program mode, step C3150 is performed.
Proceed to Step C312 if in manual mode
Proceed to 0.

That is, when the finally set mode is the program mode, the process advances to step C3150, and when it is the manual mode, the process advances to step C8120 for setting the shutter speed and aperture value.

In step C8120, use the up/down key A (805)
Switch (SWua) (SWda) linked to (80G)
), and if either is pressed, the shutter speed value (TV(a) is incremented or decremented in step C8122 or step C3124 and the corresponding processing is performed. Next, in step C
Proceed to 5130 and press up/down key B (80
7) Switch (S Wub) linked to (808) (S
Check the status of Wdb), and if any is pressed, step C8132 or step C3134
The aperture value (Av value) is incremented or decremented in step C3150, and the corresponding processing is performed.

On the other hand, if it is determined in step C5100 that the rso key (803) is pressed, the process goes to step C3140 and the ISO display command (bst) in the serial register is
After setting, in step C8142, the state of the switches (S Wua) (S Wda) linked to up/down keys A (805) (80G) is checked, and if any of them is pressed, step C3144 or step At C5146, the film sensitivity value (Sv value) is incremented or decremented, the corresponding processing is performed, and the process jumps to step C3150, and then step C8.
150 is a circuit that displays the contents of the serial register (500)
After sending the data to 70-, it returns to the original 70-.

As described above, step C8150 is executed and the control C
This is why serial data is transmitted from the PU (200) to the display circuit (500).

FIG. 10 is a 70-chart of subroutine "5UB-C2" showing details of the film winding operation of control CPtJ (200) shown in step C25G of FIG. In FIG. 10, first, in step C3200, the motor M (241) is rotated in the same direction as when releasing the shirt to start film winding, and in step C202, the serial register is set in the winding state (b41=
01b4°=1) to transmit serial data to the display circuit (500). Then, step C320
Step C3210 sets a fixed time (for example, 1.5 seconds) to a timer built into the control CPU (200) and starts this timer. Step C3210 checks the state of a switch (not shown) that detects the completion of film winding. To check.

Here, until the completion of film winding is detected, the contents of the timer started in step C3204 is checked in step C3212, and until the timer is up, steps CS210 to C3212 to C3 are checked.
210, and when the winding of the film is completed, it is detected in step C3210, and the process proceeds to step C8220 to stop the rotation of motor M (241). Next, in step C3221, the state of the film detection switch (SWsls) is checked to determine whether the film is being wound normally, and if the film is being wound normally, the process is performed in step CS.
222, and increments the 7-frame count value (bss-bs.) of the Nria J register. If the film is not wound in step C9221! (
(When no film is loaded or when loading the film fails for some reason), proceed to step C82.
23, clear the frame count value (b2.~b,.) of the serial register to zero, and step C32.
Join the 24th. In step C3224, the winding completion state is sent to the serial register) (b41 = O,
b4o=O), and the display circuit (S
Sends serial data to OO) and returns.

On the other hand, if time-up occurs in step C3212 before the completion of film winding is detected in step CS210, that is, if film winding is not completed within a certain period of time, the process exits from step C3212 to step C3230.

In this state, after all the frames have been photographed, the film is stuck in the middle of raising the last 7 frames to 8. At this time, the rotation of motor M (241) is stopped in step CS230, and step C323
In step 2, information indicating that the film is stuck is set in the serial register (b, , = 1, b, . = 1), and serial data is transmitted to the display circuit (500).
In step C3234, the shirt release operation is prohibited,
In step 236, the power supply voltage Vcc is turned off to enter a standby state.

FIG. 11 shows the detailed operation of the unwinding control subroutine "SU[3-C3" at step C290 in FIG.
By operating the et return switch (+311) shown in the rjSi diagram showing the chart, the switch (S
When the control CPU (200) is turned on, the control CPU (200) is interrupted and the subroutine "5tJB-" shown in FIG. 11 is executed.
C3'' is executed. First, in step C3300, the state of the film detection switch (SWsls) is checked, and if this switch (SWsls) is ON (when no film is loaded), it is determined that rewinding is necessary. Since there is no, it returns immediately and the switch (SWsls) is OFF.
In the case of F (when the film is loaded), the process advances to step C3302 and a rewinding operation begins.

In this rewinding operation, motor M.

(241) and motor M2 (242) are not turned on at the same time, in step C3302, motor M2 (242) is first turned on.
, (241) are stopped, and step C83
Display circuit (SOO) indicates that rewinding operation has started at 04.
After setting the serial register to the 8 rewind state (b, , = 1, b, . = 0) and transmitting serial data, in step C830G, the rewind motor M2 (242) Turn on the power and return it to 8 to start F.
let While this rewinding operation is in progress, step C33
At step C3308, the state of the film detection switch (SWsls) is checked, and as long as this switch (SWsls) is OFF, the loop of step C3308 continues.

When the film finally comes off the spool shaft,
The film detection switch (SWsls) is turned on, so proceed to step C3310 and press the ISO key (803).
) Check the switch (SWiso) linked to

Here, if the ISO key (803> is not operated and the switch (SWiso) is OFF, step C33
After waiting a sufficient time (for example, 5 seconds) for the film leader section to be completely rolled up in the cartridge in step C8314, the rewind motor M2 (242) is turned on.
stop the rotation. On the other hand, in step C5310, the IS
If the O key is pressed and the switch (SWiso) is turned on, the process immediately proceeds to step C3314 without waiting a certain period of time in step C3312, and the motor M2 (SWiso) is turned on.
242) is stopped.

Then, after stopping the rotation of the motor M2 (242) in step C3314, one serial register is changed to 33 (b, , = o,
b. = 0), performs serial data transmission and returns.

Here, the ISO key (80
The branching based on determining the state in 3) winds the film leader into the cartridge when rewinding is complete, but it is designed to allow the photographer to freely choose whether to leave it in place. be. In other words, if you want to leave the film leader section outside of the cartridge,
When rewinding the film (film detection switch (SWs)
ls) is turned from OFF to ON), press the ISO key (
803), and if you want to wind the film leader into the cartridge, you can rewind without pressing the ISO key (803).In this example, the film leader The operation key (803) is used to specify whether or not to carry out the operation of winding the part into the cartridge, but the invention is not limited to this, and for example, the mode key (804) or other stirring operation can be used. Any member, such as a switch, that is not normally operated during the rewind operation may be used.Also, in this embodiment, when you want to leave the film leader part, you press the ISO key (803), but conversely, if you want to leave the film leader part, you press the ISO key (803). Use this ISO key (803) when you want to include all the files in the patrone.
It goes without saying that you may also press .

FIG. 12 shows a 70-chart of the operation of the subroutine "5UB-C4" for automatic loading control (initial loading) during film loading shown in step 0280 of FIG. 7. In FIG. 12, first step C34
02, enter the DX code of the film loaded in the camera as D.
It is read from the X contact (250), converted to ISO value data in step C3404, and stored in the serial register (b, 6 to b, .). Then,
At step C340G, set the ISO display command bit in the serial register (b, , = 1), and then proceed to step C340G.
Serial data is transmitted to the display circuit (SOO) at 3408, which causes the display circuit (500
) is forced to IS during the initial loading operation period.
Display O value.

Next, in step C3410, frame feed 1 (47 frames) at the time of initial loading is set in the soft counter, and in step C3412, the release m motor M, (
241) and waits in step C3414 until the main mirror has finished rising, step C341
When the main mirror ascent completion detection switch (not shown) is activated in step C341G, the rotation of the motor M (241>) is stopped, and the rotation of the motor M (241> is stopped slightly (for example, 3) in step C3418.
0m5ec), and in step C3420, the 8 outside raising subroutine "5UB-C" shown in the Pt5lo diagram is executed.
2” performs initial 8-up of the film.

Note that the reason why a waiting time is provided in step C3418 is to provide a stop time when the motor M1 (241) switches from normal rotation to reverse rotation to reduce the burden on the power supply system due to back electromotive force.

Next, in steps C5422 and C3424, the content of the count counter is decremented and it is determined whether it becomes zero or not, and if the result is not zero, step C
3412, and if the value is zero, the process proceeds to step C5426. That is, at the initial winding of the film, the operations of steps C8412 to C3424 are repeated four times. When the film advance operation is completed by the release operation a total of four times, the state of the film detection switch (SWsls) is checked in step CS42G, and this switch (SWsls) is OFF, that is, the film is being fed normally*.
If it is, the frame count value (bl, ~b, .) of the serial register is stored in step C3428.
000001” (binary number) and press the switch (
SWsls) is ON, that is, if the film is not loaded normally, the 7 frame count value (b5.~b, .) is cleared to zero ("o") in step C3430.
ooooo'').

Then, in step C3432, the serial register IS
O display command b2? is cleared, the serial data is transmitted to the display circuit (500) in step C8434, and the process returns. Therefore, during initial loading, the sensitivity value (ISO value) of the loaded film is automatically read and displayed on the display section (6OO), and when the initial loading is completed, the ISO value table is displayed. The display is removed and switched to the 7 frame count value. At this time, if the frame count value is 1", it indicates that the film is loaded correctly; if the frame count value is "O", there is no film in it, or the initial loading is not working properly and the film is wound up. Indicates that it is not.

Next, the operation of the display circuit (SOO) will be explained. First, Table 2 shows the configuration of the liquid crystal driving data storage register (display RAM) of the display circuit (SOO).

(Left below) In Table 2 Uni, in Table 2, (1a) to (1g) = (2a
) ' ~ (2g) = ... (8a) ~ (8g) each indicate each segment in the 7-segment numerical display, and the positions of the segments) (a) ~ (g) are As shown in Figure 13.

In this embodiment, a display circuit (500) is configured by a 4BIF microcomputer, and a display section (600) (7
The driving method of the liquid crystal that makes up the 00) is 1/4 DT.
A 1/3 bias method is adopted. And ff12
The drive signal corresponding to each bit (bo) (b+) (bz) (b, ) in the table is transmitted to the fJS3 diagram display circuit (SOO
) common terminals (COMO) (COM, ) (COM2) (COM, ) that constitute the common data bus (COM) of
The display RA of the display circuit (500)
Drive signals corresponding to 7 addresses (cl,)-(dl l) of M are output from segment terminals (S,) to (S2.) forming the segment data bus (SEG), respectively. The matrix of the signals from these common terminals and the signals from the segment terminals is used to display the displays (600) and (700) shown in FIGS. 4 and 0's5.

Figure 6r514, which shows the 70-chart of the program showing the operation of the display circuit (500), is shown in Figures m14 to 26.
Among them, the power-on reset routine, which is the operation when the power battery is attached to the camera, is shown. When power is supplied to the camera, the program counter is reset by hardware, and the display circuit (500) starts executing the main routine shown in FIG. First, in step DO2, each port of the display circuit (500) consisting of a microcomputer is set to predetermined initial conditions, and in steps DO4 and D
Stack and RAM initialization is performed at O6. Next, in step DO8, subroutine "5UB-D1
This subroutine is a program for checking the operation of the display units (600) and (700) consisting of liquid crystal display devices, and the display unit (600) is executed only when a special operation is performed.
All segments of (700) are displayed simultaneously, and in other cases, the process returns without displaying all segments.The details of this operation will be described later with reference to FIG.

When this subroutine ends in step DO8, the process proceeds to step DIO, where various interrupt flags (external interrupt flag, timer interrupt flag, serial interrupt flag, etc.), which will be described later, are cleared. Next, in step D12, a constant that gives 250 m5ec to a timer built in the display circuit (500) is set, and then, in step D14, the timer is started.

Then, in steps D16 and D18, an external interrupt (EXT
, INT, ) and timer interrupt, (TIMERINT,)
After making it ready for reception, the system clock is stopped in step D20 and the system enters a standby (stop) state. Here, when the present display circuit (500) enters the standby state with interrupts enabled, it can return from the standby state to the normal state upon generation of an interrupt request and perform the interrupt processing.

Furthermore, even if the oscillation circuit (503) enters standby in step D20, the oscillation circuit (503) continues to oscillate, and its clock is input to the built-in timer.
When 250 m5ec elapses after executing step 18, an interrupt request is generated from the timer built in the display circuit (500), and the display circuit (500) exits the standby state and processes the timer interrupt routine.

The details of this timer interrupt processing routine will be described later, but the display circuit (500) periodically (2
It is possible to exit the standby state and perform processing every 50 msec). Further, even when an interrupt request is generated by an external signal in the standby state, it is possible to exit the standby state and perform processing corresponding to the interrupt request.

Fig. f515 shows a 70-chart of the subroutine "5OB-Di" shown in step D08 in Fig. fi14 for displaying all segments of the display sections (600) (700). When jumping to the main routine at step DO8 of the power-on reset routine shown in Pt514, first the main switch (aOO) is turned on at step DS100.
The state of the switch (SWIll) linked to is read from the boat, and the input port (PORT) of the display circuit (500) to which this switch (SWm) is connected is "Lou+".
If so, the main switch (aOO) is in the "ON" position and the switch (SWm) is ON, so the process jumps to step DS130 and returns without doing anything. On the other hand, the input port (POR) of the display circuit (500)
T) is “Higb”, the main switch (80
0) is in the "LOCK" position and the switch (SWm) is OFF, so proceed to step DS102 and set the built-in timer to a constant equivalent to 500111 seconds, and then step DS103 to set the external interrupt (E
XT, INT, ), then step DS104
The switch linked to the main switch (aOO) again (
The state of SWa+) is read from the input port (PORT) and the state is determined.

If this input port is "High", that is, the main switch (800) is OFF, step D31
Proceed to 0G and determine whether the built-in timer has finished counting 500 m5ec, and if it has not finished counting, proceed to step D.
Return to S104, and if the time measurement has ended, step DS1
The process advances to step 20 to enable external interrupts (EXT, INT,), jumps to step f, step DS 130, and returns. Ste 7
Input port) (PORT> is Lo at DS104)
w''', that is, if the switch (SWm) linked to the main switch (800) is ON, the process goes to step DSIIO, sets all addresses (dl) to (dl1) of the display RAM, and displays the display section (600) and ( 700), all interrupts are prohibited in step DS112.

Step DS 1141 and main switch (
The state of the switch (SW+a) linked to the switch (SW+a) is checked, and as long as this switch (SW+*) is ON, the loop goes through step DS114, and this switch (S
When Wm) turns OFF, the process goes to step DS116, all addresses (dl)-(dz+) in the display RAM are 9'J7, and all segments of the M connectors (600) and (700) are turned off. Then, in step DS120, external interrupts (EXT, rNT, ) are enabled, and the process returns.

That is, to summarize the operation of the subroutine shown in FIG.
This switch (SWm) is turned OFF by operating aOO).
The display section ((300
) (700) is performed, and in other cases, no special operation is performed and the process returns. Then, the display section (60
0) (700), operate the main switch (800) again and return the switch (SWm) from ON to OFF to turn off all the displays and return to the normal processing routine. Return to

Next, the contents of the printer flag register are shown in table fiS3. Here, this printer flag register is a collection of flags related to the blinking display operation of each display element of the display section (600) (700). Blinking display is not performed only when the contents of this register are all 0'', and if even 1 bit of the flag is set, blinking display processing is performed.In other words, the contents of this plink 7 lag register are ``θ''. If not, the process jumps to a routine for blinking display processing, and causes the display element corresponding to the set flag to blink in accordance with the contents of a plink counter, which will be described later.

(The following is a margin) Table 3 (The following is a margin) As described later, in the program for the display circuit (500) of this embodiment, an interrupt is generated by a timer every 25,016 seconds, and in the interrupt routine, a 2-bit interrupt is generated. Since the plink counter that is displayed is in the process of being incremented, the lower bits of this plink counter change at 2 Hz, and the upper bits change at IHz''Ch. Therefore, in the blinking display processing routine described later, By referring to the plink counter, the blinking period of the display element can be set to 2Hz or IHz depending on the type of flag.
and can be controlled arbitrarily.

Next, each bit of the plink 7 lag nosta shown in Table 3 will be explained. First, (FO) is a flag that is set when film is not loaded correctly in the camera, and by referring to the flag (FO), the film loading warning display (LOAD FILM", that is, the display element (611)
(blinking of 612)) is performed. (Fl) is a flag that is set when all 7 frames of the film have been shot, and this 7 lag (Fl) is referenced to display the film end warning display (FILM END'', that is, the display element (612)).
613) flashing) is performed. Furthermore, (F2) is 8 of the film! This flag is set when the I-return is completed, and a warning display for film removal (blinking of the cartridge mark (621)) is performed with reference to this flag (F2).

(F4) is a flag that is set when the battery check circuit (120) detects a drop in the power supply voltage. Referring to this flag (F4), the battery mark (615) and ( 733) flashing) is performed.

Next, FIG. 16 shows the timer interrupt processing routine 70-
The chart shows that this timer interrupt is 250 ase
It is designed to occur every c. When a timer interrupt occurs, the display circuit (SOO) saves the contents of the accumulator and working register in step Di00, and then increments a 2-bit plink counter in step D102.
Check the status of the main switch (800) in step 4, and check the switch (SWm) linked to the main switch (800).
When it is OFF, the process advances to step D106, and when it is ON, the process jumps to step D120.

If the main switch is OFF, the serial data frame count value (b5.~b,.

), the value of the 7 frame count is checked, and if it is not zero, the subroutine "5U" is executed in step D110.
B-D5" to display the frame count value on the display unit (600), and in step D112, bits (b2) (bO) of the 7th address (d6) of the display RAM
By setting the address (dl) and address (dl) (b2), the display element (612)
In addition to displaying the characters, the patrone mark (621
) and a film set mark (624) are displayed.

When the frame count value is zero in step D106 of FIG. 16, all addresses (do) to (d,) of the display RAM are cleared in step D108 to erase the entire display.Next, in step D114, the plink 7 lag register is cleared. After clearing 7 lags (F4), it enters standby state. Here, even in the standby state, the display circuit (S
The built-in timer in OO) is working and 250 as
If ec[, another timer interrupt occurs.

If it is determined in step D104 that the main switch (SWm> is ON), the plink 7 lag nosta is checked in step D120, and if it is zero, there is no need to perform blinking display processing, so the process jumps to step D140, and the accumulator and working register are checked. Restores the contents of and returns.

If the contents of the plink 7 lag register are not all zero in step D120, step D
122, proceed to D126, and sequentially execute the subroutine "5U"
Call B-D91"5UB-D8" and step D1
Move to 40. That is, subroutine "'5UB-D9
1""5UB-DB" is a program that 0N10FFs the related display segments in each according to the contents of the link counter, as described later.
All display elements that require blinking display are processed in step DI22.
- Blinking is controlled appropriately in D126.

FIG. 17 shows the external interrupt processing routine of the display circuit (500). When the control CPU (200) changes the display circuit selection signal (C3DSP) from "High" to "Low", an external interrupt request is generated in the display circuit (SOO), and the display circuit (500) is in an external interrupt enabled state. 17, the processing of this routine shown in FIG. 17 is started. Note that even if the display circuit (SOO) is in a standby state, the display circuit (500) is activated by this external interrupt and executes this routine. .

In this embodiment, from the control CPU (200) to the display circuit (S
A serial flag (not shown) provided in the display circuit (SOO) is set every time 1 byte (8 bits) of serial data is sent to the display circuit (SOO), and the display circuit (SOO) is set by software. This serial flag can be checked and refreshed, and by detecting the state of this serial flag, it is possible to know whether or not one byte worth of dedication has been completed. Note that the display circuit (500) is provided with a 3-bit counter (not shown) for bit counting of this serial data, and this 3-bit counter counts one byte of serial data and sets a serial flag. It is supposed to be done. This 3-bit counter can be cleared by SO7TOZETSE7.

In FIG. 17, the display (500) shows that when an external interrupt occurs, the contents of the 7 storage register and working register are saved in step D200, and then the contents of the 7 storage register and working register are saved in step D200.
Step D20 calls the subroutine "5UB-D6" to be described later in step D2 and executes the process of importing the serial data sent from the control CPU (200).
Check the serial end flag in step 4. Here, this system 17 Full end flag is set to subroutine "
This is a flag that is set or cleared in 5UB-D6'', and is set to 1 when the serial data has been completely received.
This flag is set to θ″ and cleared to θ″ if complete reception is not possible.

Then, in step D204, the state of the serial friend flag is determined, and if this flag is ``0'''', the process jumps to step D240, restores the contents of the achievator and working register, and returns.

That is, this corresponds to a case where new information cannot be received as serial data even if an external interrupt occurs, and therefore there is no work to be processed in this routine.

On the other hand, the serial end flag is set to 1'' in step D204.
If so, proceed to step D210, call the subroutine "5UB-D9" to be described later, and display the puff skin test result based on the new serial data, and then proceed to step D212 to call the subroutine "5UB-D9" to be described later.
After calling 5UB-D5'' and displaying the frame count value, the main switch (SWm) is turned on in step D214.
Check the status of. Here, if the main switch (SWm) is OFF in step D214, step D
In steps 210 and D212, the battery check result and the 7 frame counter F value are displayed, and then the process jumps to step D240, restores the contents of the achievator and working register, and returns. Meanwhile, the main switch (SWm) is ON.
If so, proceed to step D216 and check the bit (bst) of the serial data, and if bit=1, l5
Since it is the O4f1 display mode, the process jumps to step D230, calls a subroutine "5UB-D4"' to be described later, displays the ISO value, and then jumps back to step D240.

b3 in step D216? If =0, step D2
20, the subroutine "'S U B-D" will be described later.
2'' displays the shooting mode, and in step D222 the aperture value (A
V value) and shutter speed value (Tv value) are displayed, and further, in step D224, subroutine "5U" to be described later is performed.
After displaying the film feeding status through B-D7'', the process jumps to step D240 and returns.

FIG. 18 shows a 70-chart of the subroutine "SUB-D2" for displaying the exposure control mode shown in step D220 in FIG. 17. In FIG. 18, first, in step DS200, bits (b, .) of the serial data sent from the control CPU (200) are detected to determine the exposure control mode, and when the program mode (P mode) is selected, jump to step DS202. and manual mode (
M mote), jump to step DS210. Then, in the case of program mode, step DS2
02, bit (b,
) and (b2) respectively to display the program mode.Here, the segment data bus (SEG) that transmits the output signal from the address (dl) of the display RAM is connected to the camera body ( 1) Upper display part (6
00) and the display section (700) in the display screen, the program mode is displayed at the same time on the image display section (600) and (700). Next, in step DS204, by clearing the bit (b,) of the address (d,) and the bit (b,) of the address (dls) in the display RAM, the metered manual display index (732) ( 731)? Leave and return.

On the other hand, when the manual mode is determined by the Sten7'DS200, 1 is set to bits (b3) and (bz) of the address (d,) of the display RAM in step DS210.
．． After writing 0 and displaying the manual mode, the metered manual index is displayed in steps DS212 to DS222.

That is, the bit (b,) of the serial data is checked in step DS212, and if b, = 1, step DS
214 displays RAM address (dls)) (
b, ) to "1" to display the mark (731), and reverse it. If =o, go to step D3216 to reset the display RAM address (dos) (b3) and display the mark (731). After erasing 731), the serial data p) (b, .) is checked in step D3218, and b+ is selected. If = 1, display RAM address (
Mark (732) by setting bit (b,) of d,).
and conversely bl. If = 0, clear bit (b,) of address (d,) in display RAM and mark (732
) and return.

Next, in FIG. 19, the aperture value (Av value) and the shutter speed value (Tv value) shown in step D222 in FIG.
Subroutine I'5UB-D3'' for displaying the value)
In the fjSlS diagram showing the 70-chart, first, in step DS300, data indicating the aperture value (Av value) is read from the serial data register (b, , ~b, 2).
Take the signal into the 7K emulator and proceed to step DS3.
In step DS304, the data is converted into a corresponding F value, and further in step DS304, the obtained F value is converted into a segment (f) for display. Furthermore, step D3306
By transferring the segment data to the corresponding addresses (dos) to (d, .) of the display RAM (see Table 2), the F value is displayed on the display section (700).

Next, in step DS310, bits (b2.) to (b22) of data indicating the shutter speed value (Tv value) are fetched from the serial data register into the 7 cumulator, and in step D331G, the fetched TvF value - ta is set as the shutter speed value. Convert data and step D8318
The shutter speed value obtained is further converted into corresponding segment data. Then, in step DS320, the segment data is transferred to the corresponding address (d) of the display RAM.
s) to (d, 4) (see table m2), the shutter speed value is displayed on the display section (700), and the process returns.

Furthermore, in FIG. 20, 70 of the IS○ value display sub-chin "5UB-D4" shown in step D230 of FIG. 17 is shown.
- In FIG. 20 showing the chart, first step D
Serial data beep at S400) (b3.) ~ (b
s. ), and after converting the data into an ISO value corresponding to the Sv value in step DS402, a segment for displaying the ISO value on the display section (600) is further processed in step DS404. Convert to data. Next, in step DS406, all addresses (do) to (d,.) of the display RAM are cleared and the display section (
600) After erasing all the above displays, step DS408
The segment data regarding film sensitivity obtained earlier is transferred to 7 addresses (ds) to (d, .) of the display RAM, thereby displaying the ISO value on the display section (600) and returning.

Next, FIG. 21 shows the frame count value display subroutine "5UB" shown in step D212 of i@17.
In the Pt521 diagram showing the 70-chart of ``-D5'', first, in step DS500, a frame count value is obtained as binary data from bits (b,,) to (bs.) of the serial data, and in step DS502, the data is set to zero. Step DSSO2
If this frame count value is not zero, step 7
Step DS504 clears the 7 lag (FO) of the printer flag register, and step DS506 converts the frame count value, which is binary data, to a decimal number. Converting to segment data 1 Next, in step I) 3510, set bit (b2) of address (d6) of display RAM and clear bit (b,) so that the character "LOAD" is not displayed. , At step DS512, display the segment data of the 7 frame count value. 7 addresses (ds) to (ddz) of the RAM
The 7 frame count value is displayed on the display unit (600), and the process returns.

On the other hand, if it is determined in step DS502 that the frame count value is zero, it is considered that the film is not loaded or the initial loading of the film was not performed normally for some reason, so the process proceeds to step DS520. Branch and set the 7 lag (FO) of the printer flag register, and proceed to step DS5.
By referring to the lower bits of the link counter in step 22, step DS524 or step D8526 is executed.
) Controls the display* or deletion of the statement "L, OAD FI LM" and returns.

Furthermore, FIG. 22 shows the serial data import subroutine "5UB" shown in step D202 of FIG.
-D6'''70-chart is shown.

First, timer interrupts are disabled in step DS600 entered by this subroutine. This is to give priority to serial data processing over timer interrupt processing, so if a timer interrupt request occurs during serial data processing, that request is held, and after serial data processing is completed, the timer interrupt request is By canceling the interrupt prohibition, the held timer interrupt processing is performed.

Next, in step DS602, the display circuit (500)
The state of the display circuit selection symbol (C8DSP) input to the external interrupt terminal (INT) of the computer is determined by software. Then, this display circuit selection signal (C8DSP) is “H”.
i11b'', this means that serial communication is not performed regularly, so the process jumps to step D8626, clears the serial end flag, and then returns to step DS6.
The process jumps to step 40, cancels the prohibition of timer interrupts, and returns. On the other hand, in step DS602, the display circuit selection signal (C8
If it is determined that the DSP) is Lo@'', it is determined that the communication is a regular serial data communication, and the process moves to step DS610.

Steps DS610 to DS638 are a processing routine for reading serial data sent from the control CPU (200) to the display circuit (SOO). First, in step DS610, the serial flag is cleared since it is waiting for serial data to be sent, and step DS6
At step 12, a 3-bit counter (not shown) for counting 1 byte (8 bits) of full data is cleared, and at step DS614, the start address of the RAM where the serial data is stored (in this example, it is written as ♂) is cleared. ) to the address pointer of the RAM to prepare a system for accepting serial data.Next, step D
For example, "5 m5ec" is set to the software timer in S616.
After setting the data corresponding to ''', step DS6
Move to 1B and check whether the serial flag is set.

If the serial flag is not set in step D661B, the process moves to step DS620 and the display circuit selection signal (C8DSP) is checked again. and,
At step DS620, this display circuit selection signal (C8DS
If P) remains "Low", it is determined that the serial data transmission state is continuing and the process proceeds to step DS622, where the software timer value previously set to '5 m5ec' is set in step DS616. Then, the content of the software timer is determined in step DS624. If the content of the software timer is not zero, the process advances to step D361B, and if it is zero, the process jumps to step DS626.

In step DS620, the display circuit selection signal (C8
DSP) is determined to be “High”, step DS
The program jumps to step 626 to clear the serial end flag, then jumps to step DS640, cancels the prohibition of timer interrupts, and returns. In other words, even though the display circuit (SOO) is notified of serial data transfer by the display circuit selection signal (C8DSP), the transmission is interrupted for some reason without completing the transfer of all serial data. In this case, the display circuit selection signal (C8DSP) becomes "High" before the serial flag is set, so the display circuit (500) determines this in step DS620 and returns. In addition, even though the display circuit (500) is notified of the serial data transfer by the display circuit selection signal (C8DSP), for a certain period of time (5 m5e set in the software timer)
If the serial flag is not set within c''), it is assumed that the serial data transfer is invalid and the process returns.

On the other hand, when performing normal serial data transfer, the program of the display circuit (500) is executed from steps DS600 to DS618. DS620. D9 via DS624
The process continues in a loop returning to step 618, but when one byte (8 bits) of serial data is sent and the serial flag is set, the process jumps from step D8818 to step DS630 and proceeds to the serial data loading process. First, in step DS630, the serial data sent to the serial data register is loaded into the accumulator, and the data is stored in the address pointed to by the 7 address pointer of the RAM. In step DS632, a 3-bit counter for counting serial bits is loaded. Clear the RAM in step DS634.
0 Next, in step DS636, the contents of the address pointer of this RAM are checked, and a predetermined value (in this example, ``■+5'') is incremented.
'), the process returns to step D861B and waits for the next serial data to be sent in. Also, if the content of the address pointer of this RAM is a predetermined value ("Tsu+5") in step D3636, Step D
Jump to S638. That is, in the program of the display circuit (500) of this embodiment, steps DS618. DS63
0. If you go around the loop of DS636゜DS618 5 times,
The process exits to step DS638, and the serial data acquisition is completed. Then, after setting the serial end flag in step D8638,
In step DS640, the prohibition of timer interrupts is canceled and the process returns.

In FIG. 23, shown in step D224 of FIG. 17,
70 of the subroutine "5UB-D?" for displaying information related to film winding and rewinding (drive display)
- Chart is shown. First, in step DS700, it is determined whether or not the film is in the end state based on bits (b, , ) (b, 2) of the serial data, and a film shooting end status is issued. !
! ! If (b, , = 1, b4° = 1), the process branches to step DS730. If the film is not finished, proceed to step DS702 to clear the 7 lag (Fl) of the printer flag register, and in step DS704 determine whether or not the film is being wound by serial data beeps (b4+) (b<.). However, if winding is in progress, the process branches to step DS740. On the other hand, if the film is not being wound, the display RAM address (
d, ) is cleared to erase the display element (623) indicating film winding, and step DS
Serial data via at 708) (b4+) (b<.

), it is determined whether the film is being rewound, and if the film is being rewound (b, .=1, b, .=0), the process branches to step DS 750. If the film is not being rewound, the 7 lag (F2) of the plink 7 lag register is referred to in step DS710, and this flag (F2) is set to 1''', that is, immediately after the rewinding operation ends (details will be described later). If the 7 lag (F2) is N0'' in step DS710, the process branches to step DS770.
That is, if none of the above cases apply, the process proceeds to step D8780, where the 7 lags (F2) and (F3) of the printer plug register are cleared to 'θ'', and the process proceeds to step DS790.

The film ends at step DS700 (b,,=1°b,
. =1), the 7 lag (Fl) of the plink 7 lag register is set to 71'' at step DS730, and the 7 lag (FO) is cleared to N0'', and the process jumps to step D8780.

Also, in step DS704, the film is being wound (b, 1=
o, b,. =1), in step DS740, the display element (623) indicating that the film is being wound is displayed by setting the beep (b,) of the address (d,) of the display RAM; Step D3780
Henoyante.

Furthermore, the film is being rewound using the stainless knob DS708 (b
4+ = 1, b<. = 0), in step DS750 the plink 7 lag register 7 is
Check the lag (F2). This flag (F2) is
It is set at the start of the film rewind display and reset at the end of the film rewind display.

Therefore, in step DS750, this 7 lag (F2) is N
In the case of 0@, this is the first time that the film is being rewound, so the process proceeds to step DS752 and performs the rewinding display start process. First, in step DS752, the above-mentioned 7 lag (F2) is set to "1", All 7 dresses in the display RAM are cleared in step DS754, and step D8
At 756, the initial display of rewinding is performed. Here, the initial display of rewinding is performed at the display RAM address (d, > (d,) (
By setting all (b6) of d (d) (d) (dt), the patrone mark (653), the rewind pargraph display by the display elements (654) to (657), and the rewind mark ( 652) and the display section (60
0) displayed above.

Next, in step DS75B, the current 7 frame count value "N" (serial data bits (bss) ~ (
bi. ) data), N1=(NXP+a)X
(1/4) (However, N1 is rounded to an integer value.) In step DS760, the obtained value N1 is set in the event counter, and in step DS76
At step 2, "3" is set in the soft counter (N2) and the process jumps to step DS790.

In addition, in the calculation at step 758, P is 0N10F of the switch (SWsp) during the film rewinding process.
The number of pulses generated by the F operation corresponds to 17 frames of the film, and a is the number of pulses corresponding to the length of the leader portion of the film. Therefore, NX
P+a is the total number of pulses due to ON10FF of the switch (SWsp) that is expected to occur during the entire process of rewinding the film, and the value Nl obtained in step DS760 corresponds to 1/4 of that number.

On the other hand, step 1) 7 lag (F2) is N1″ in S750
In this case, the rewind display has already started, so step DS? 90 heno jump and rewind mark (
622) flashing display *ta, step DS710
If the 7 lag (F2) is N1'', the film is not being rewound (and the film rewinding display is being displayed), so the motor M, (242
) has stopped rotating, so step DS77
The flag (F2) indicating that the rewinding table is being displayed at 0 is cleared to θ''', and the flag (F3) indicating the end of rewinding.
is set to N1'', and the process proceeds to step DS790, where the patrone mark (621) is displayed blinking.

After each of the above processes, step D87G2, DS7701
Or it will jump from D3780 to step DS790, but in step DS790 subroutine "5UB-
D8'' controls the blinking display related to film winding and rewinding, and then returns.

In this embodiment, the bar graph indicating the progress status during film rewinding is displayed by four bars as shown in steps D3758 to D762 and FIG. . Generally, if the number of bars in the bar graph is n'', the calculation in step D8758 is N1=(NXP+α)X(1/n), and in step DS762, (N2)''-(n-1)
In addition, the branch at step D404 of the event counter interrupt routine in the tjS2S diagram, which will be described later, is (
n-1) [1.

As described above, in this example, the switch (SWsp) is opened and closed in conjunction with the rotation of the film rewind shaft. As the film is rewound, the film is wound around the rewind shaft, so its diameter gradually increases, so the number of 7 frames per unit rotation of the rewind shaft gradually increases. go. Therefore, the number of 7 frames and switch (SWsp) during film rewinding operation.
It is not strictly proportional to the number of pulses generated. Therefore, by turning ON10FF of (SWsp), the frame count display cannot be accurately down-counted according to the progress of film rewinding. However, according to this embodiment, even in such a case, by using the graphic rewinding display using the bar graph as described above, the progress status of the film rewinding operation can be displayed visually and intuitively. can. Note that here, the switch (SWsp) is configured to be opened and closed in conjunction with a sprocket, etc.
It goes without saying that this example can be used even when the pulses generated by ) have a strictly one-to-one relationship with the running of the film.

Next, FIG. 24 shows a 70-chart of the subroutine "5UB-D8" for controlling the blinking of the display related to film winding/rewinding shown in step D126 of the PtSi2 diagram. In the tjS24 diagram, first step D
At S800, the 7 lag (Fl) of the plink 7 lag register is checked, and if this flag (Fl) is "1", the process branches to step DS810 to display a film end warning. On the other hand, when the flag (Fl) is 0'', proceed to step DS802 and check the flag (F2), and when this flag (F2) is 1'', branch to step DS820 to display film rewind. do.

Also, if the flag (F2) is O'', step DS
Proceeding to step 804, the flag (F3) is checked, and if this flag (F3) is 1'', the process branches to step DS830 to display a film rewind end warning. If is '0', the process proceeds to step D8806 to check the flag (FO), and if this flag (FO) is 1'', the process branches to step DS840 to display a film end warning. On the other hand, step DS806 7 lag (FO) is O''
If so, all 7 lags of the plink 7 lag rexta are zero after all, so there is no need to perform a blinking display related to film winding/rewinding, and the process jumps to step D8850. On the other hand, 7 lag (Fl) at step DS800
When is "1", bits (b, ) (b2) of address (d6) of the display RAM are cleared in step DS810 to erase the exposure control mode display, and step DS81
By referring to the lower bits of the plink counter in step 2, bits (b2) and (bl) of the display RAM address (d6) are set or cleared in steps DS814 and DS816, and characters are displayed by the display elements (612) and (613). ``FILM END'' is turned on or off, and the process jumps to step DS850.

When 7lag (F2) is 1″ in step DS802,
At step DS820, the bits (b) of address (da) (b2) and the bits of address (d6) of the display RAM are displayed.
By clearing (b3), (b2), and (bl), the exposure control mode display and "LOAD" and "FI"
Erase each character of LM″″END″ and proceed to step DS82.
By referring to the lower bit of the link counter in step 2, the display RA is displayed in step DS824 or DS826.
Set or clear the bit (bl) of address (d,) of M, turn on or off the rewind mark (622), and jump to step DS850.

When 7 lag (F,) is 1″ in step DS804,
By referring to the lower bits of the link counter in step DS830, the display RAM is displayed in step DS832.
The patrone mark (621) can be set by setting the bit (b2) of the address (d7) or by clearing all 7 addresses of the display RAM in step DS834.
is turned on or off to indicate the end of rewinding, and the process jumps to step DS850. Also, step D8
When the 7 lag (FO) is 1'' in step 806, by referring to the lower bit of the link counter in step DS840, bits (b, ) (b2) of address (d6) of display RAM are determined in step DS842 or DS844.
) to set or clear LOAD" and "FILM
” lights up or goes out (the film force value is displayed as zero) and jumps to step DS8501.
After each of the above processes, this subroutine all steps D.
In S850, a subroutine "5UB-D91" (described later) for displaying puff pastry check is executed and the process returns.

FIG. 25 shows the event counter interrupt processing routine. In this embodiment, as mentioned above, when rewinding the film, the switch (SWsp) linked to the film rewinding mechanism generates a pulse train according to the film rewinding state. This occurs and is input to the event counter input terminal (EVENT CTR) of the display circuit (SOO). Then, the numerical value (N1) set in the event counter in step D3760 of the subroutine "5uB-D?" shown in FIG. Then, the main routine shown in FIG. 25 is executed.

In this routine, first, in step D400, the contents of the 7 storage unit and the V working unit are saved, and then in step D402, the previously set value (N1) is set in the event counter, and then in step D404.
Check the software counter value (N2).

Then, the value (N2) of this software counter is “3”.
″′, the display element (654) (
655) and (656), three pars are displayed, and when the value (N2) of the software counter is "2", two pars are displayed using the display elements (654) and (655) in step D408, and further, If the value of the software counter (N2) is 1'', the display element (
654) to display one par, and step D
Move to 412. Then, in step D412, the value (N2) of the software counter is decremented, and then in step D414, the values of the 7 cumulator and working register are restored, and the process returns.

Furthermore, FIG. 26 shows the subroutine "5UB-" for displaying the puff pastry check shown in step D210 in FIG.
In Figure 26, which shows the 70-chart of D9'',
First, in step DS900, bits of serial data (
bz. ), and this pi) (b2゜) is ′″
1'', the battery is completely exhausted, so the process branches to step D8916 and all addresses (dl
) to (d, , ) are all cleared, all displays are turned off (lock display), and the display circuit (SOO) enters the standby state. If the serial data bit (b2°) is 0'' in step DS900, the camera function is not locked, so proceed to step DS902 and check whether the bit in the serial data is in the battery low warning range. Check by (b2.).Here, if this beep (b2.) is 0'', the battery is sufficient, so proceed to step DS904, clear 7 lags (F4) of the blink flag Renostar, and step D390
By clearing the bit (b,) of the display RAM address (d6) at 6, the battery mark (615) (73
3) and return. On the other hand, step DS90
2, if the serial data bit (b21) is 1'', step DS9 is executed to issue a battery exhaustion warning.
After setting the 7 lag (F4) in the plink 7 lag register at step 10, the upper bit of the plink counter is checked at step DS912, and if this upper bit is 1", the puff terry mark (615) (73) is set at step DS914.
3) is displayed, and the upper bit of the link counter is 0"
If so, jump to step D8906 and select the battery mark (6).
15) Delete (733) and return. As described above, the upper bits of the link counter are inverted at IHz, so the blinking of the battery marks (615) (733) is controlled at IHz.

Also, this subroutine "5UB-D9" is the step DS
912 also has another entrance, and this entrance (subroutine "5tJB-D91"')
15) (733) is used to control blinking. That is, as shown in FIG. 16, when the display circuit (SOO) is activated every 250 logics by a timer interrupt even during standby, this subroutine "5UB" is executed in step D122.
-Call the battery mark (6
15) The blinking display of (733) can be continued.

What has been explained with reference to the chart 70 in pt.46 to fig.
), we will explain how it is expressed using Figure 27. First, when the main switch (820) is set to the "ON" position when no film is loaded in the camera, the display section (600) will show that the frame force is "0" as shown in Figure 27(a). Together with “LOAD FI”
LM” flashes to warn the photographer to load film. Then, when the film is loaded and the back cover of the camera is engaged, the camera automatically advances 7 frames for 4 frames (initial loading). At the same time, the film speed is automatically read from the DX hood recorded on the film cartridge, and the 27th speed is automatically read during the initial loading.
The read film sensitivity value (ISO value) is displayed as shown in Fig. Character “FILM”
, the patrone mark (621), and the filmset F mark ([) 24) are lit. This display state is normally the standard display state when the camera is in standby mode.

Furthermore, when shirt release is performed, a winding mark is displayed by the display element (623) as shown in FIG. The display is incremented by 1''.

Also, after shooting all 7 frames of the loaded film,
If the film becomes taut during film winding, the display elements (612) and (613) will display the words 'FILM END' and the display element (623) as shown in FIG. 27(f).
) will appear blinking, requesting film rewind operation. Here, press the rewind switch (8
11) and turn on the switch (SWrew), the display on the display section (600) becomes as shown in FIG. 27(g), and the rewind mark on the display element (622) blinks and Four bar graphs of elements (624) to (627) appear, and the remaining rewind amount display starts. Then, as the film is rewound, the four bars displayed by the four display elements (624) to (G27) go out one by one every time about 1/4 of the entire process progresses. Figure 27 (11) to (j))
When the rewinding is finally completed, the motor M2 (242) is automatically stopped, and as shown in FIG. will be displayed.

In addition, when ii is closed without loading the film, an initial loading operation is performed and the display section (600) displays as shown in FIGS. 27(a) to 27(b). ? ' - Evening transmission (12th
The subroutine shown in FIG. 10 executed at step C3420 in the subroutine "SUB-C4g' shown in the figure"
In step C3226) in ``5UB-C2'', the status of the film detection switch (SWsls) was checked and the film count value was zero, so the initial loading was completed and the ISO value display was canceled. Then, the display on the display section (600) returns to the state shown in FIG. 27(a) and issues a film loading warning.

Furthermore, if a portion of the film is not properly wound onto the take-up shaft when attempting to load the film, and the initial loading does not work properly, the display state will be exactly the same as in the case without the film.

By the way, the display section (600) (7) consisting of a liquid crystal display device
An example of a check mode in which all display elements of 00) are turned on at the same time is shown in 70-70 of FIGS. 14 and 15.
I explained it in the chart. Here, in the above example,
By operating the main switch (820) at a specific timing immediately after attaching the main power battery (100) to the camera, a mode was entered in which all display elements were turned on at the same time. However, the timing for entering the mode in which all display elements are lit at the same time is not limited to the above embodiment, and may be performed by operating a specific operating member on the camera control fence at a specific timing.
You may choose to enter this mode.

Therefore, next, Figs. 28 to 30 show the timing for entering the mode in which all display elements are turned on at the same time.
70-chart of another example is shown.

In this embodiment, the Up Grankey A-
If all B (805) (806) (807) (808) are pressed, a mode is entered in which all display elements are dimmed at the same time. Moreover, by operating the main switch (820) while this mode is being executed, this mode is exited, and then regular initial loading processing is performed. Here, in this embodiment, the control CPU (
200) and the display circuit (500) to operate in cooperation with each other, a new command bit (bsy) is provided as serial data to execute a mode in which all display elements are turned on at the same time. ) is 1", the display circuit (500) instructs all display elements to display, and conversely, when this beep (bs7) is "0", normal display operation is performed.

FIG. 28 is a modification of the initial loading control subroutine "5UB-C4" (shown in FIG. 12) of the control CPU (200). In this subroutine, first, at the entrance step C8400 of this subroutine, all Up Granky-A-B (805) ~ (808
) respectively linked switches (S Wua) (S W
Check the status of da) (S Wub) (S Wc1b) and find that none of them are pressed! ! ! (OFF
), the process proceeds to step C3462, clears the full display command by serial data beep (bsy) to 'θ'', and proceeds to step C8402 in the fjS12 diagram.

That is, this is during normal use. on the other hand,
In step C3400, all 77 Pudatunkeys A-B (
If 805)-(80B) is pressed, jump to step C8450 and enter a mode in which all display elements are lit at the same time. First, in step C3450, the full display command (b, t) of the serial data is set to 1'', and in step C3452, interrupts are disabled, and in step C3454, the control CPU (20
0) to the display circuit (500). Here, as will be explained later with reference to FIG. 29, in response to this transmission, the display circuit (500) lights up all display elements. Next, in step C8456, the main switch (
820), and waits through the loop of step C3456 until this switch (SW+s) is turned OFF.

When the switch (-3Wm) linked to the main switch (820) turns OFF in step C8456, the escape goes to step C3458, and this time the switch (S
The loop of step C8458 is repeated until Wm) is turned ON. Here, when this switch (SV/+) is turned ON, interrupt prohibition is canceled in step C8460, and serial data is disabled in step C8462.
) is cleared to "0", and the process returns to normal processing from step C8402 shown in the fjS12 diagram.

FIG. ftG29 is a flowchart showing the processing operation of the display circuit (500) corresponding to the above, and is a modification of the external interrupt processing routine shown in FIG. In FIG. 29, first, serial data is received from the control CPU (200) in step D202 by an external interrupt, and then the serial end flag is checked in step D204.
If this serial end flag is 1”, step D
At 206, a full display command is checked by serial data beep (bs□). Here, this pin) (b5
If t) is 0'', the process advances to step D210 and the normal display processing as described above is performed; on the other hand, if the serial data bst) is 1'', step D208
By branching to ``1'' in all addresses of the display RAM, all display elements are turned on at the same time, and the first
The process jumps to step D240 in FIG. 2 and returns.

FIG. 30 is a 7er chart showing the timer interrupt routine of the display circuit (500), which is a modification of FIG. 16. In FIG. 30, when a timer interrupt occurs, after the Achiemulator and register are saved in step D100, all display instructions by serial data bit (b5.) are checked in step D101, and this bit (bit) is checked. If '0'', proceed to step D102 in Figure f516 and perform normal processing. On the other hand, if bit (bit) is f'1'', jump to Step D140 in Figure 16 and perform accumulator and reno star recovery processing. Go and then return. In other words, at step DIOI in Figure 30, when the output is 1", all display elements are already displayed during the serial data reception process, so when the timer interrupt occurs, Returns without processing.

As described above, all the up/down keys A-B (805
) ~ (808) and close the back cover, you can enter a mode in which all display elements are illuminated for operation, and even in this mode, the switch (SWm) linked to the main switch (820) cannot be activated. By turning it OFF once and then turning it ON again, this mode is canceled and it is possible to enter normal initial loading processing.

(Left below) In the above embodiment, the film detection switch (SWsls) was provided on the film winding spool, but this film detection switch was connected to the film passing near the rail surface of the rail that guides the film. It may be provided at any position. Furthermore, in this embodiment, the film rewinding operation is stopped immediately when the film detection switch (SWsls) is turned off.
The film rewinding operation may be stopped after approximately 1 sec has passed after s) is turned off, so that the length of the film leader portion left outside the film container is shortened. .

As described in detail above, the film rewinding device for a camera according to the present invention includes a film rewinding means for rewinding the film, a detection means for detecting whether or not film is loaded, and a film rewinding device for a camera according to the present invention. Based on an operating means that is operated to set data and can take a predetermined first state and a second state, and a signal from the detecting means that detects the film unloaded state,
In the first mode, the film rewinding operation is stopped with the leader part of the film remaining outside the film container, and in the second mode, the film rewinding operation is stopped with the leader part of the film completely wound inside the film container. a rewinding stop means for stopping the rewinding operation; and at a predetermined time during the film rewinding operation, if the operating means is in the first state, the first mode is selected; and if the operating means is in the second state, the first mode is selected; and a selection means for selecting the second mode, and with this configuration, the operating means is set to the first state before a predetermined time during the film rewinding operation. The user can choose whether to leave the film leader outside the film container or wrap it inside the film container, depending on whether the film leader is left outside the film container or rolled into the film container. It is possible to choose between a type that involves the liquid inside the container and a type that leaves it outside the container, so the user can selectively set one of the two types according to his or her preference. Workability is also improved when repeated film winding and rewinding tests are performed during camera manufacturing.

[Brief explanation of drawings]

#S1 is a top view showing the camera of the embodiment of the present invention, ttS
2 is a front view thereof, FIG. 3 is an electric circuit diagram showing the electric circuit, and FIGS. 4 and 5 are views showing each display element of the display section provided on the top surface of the camera body and in the viewfinder, respectively. FIGS. 6 to 12 are flowcharts showing the operation of the control circuit, FIG. 13 is a diagram showing segments for displaying numbers, and FIGS. FIG. 27 is a diagram showing changes in the display mode of the display section, and FIGS. 28 to 30 are 70-charts showing the operation of another embodiment. (200); Rewinding stop means, selection means, (SWsls)
: Detection means, (240) (242); Film rewinding means, (804)
;Operating means. Applicant Minolta Camera Co., Ltd. Figure 1 Figure 2 ≠ Figure 6 Figure 10 Figure 76 Figure 75 Figure 77 Figure 1 Figure 2 Figure 2 ? Figure 5 Figure 27 Figure 23 Figure 2 Figure 93θ Figure toz

Claims (1)

[Claims] Film rewinding means for rewinding the film; detection means for detecting whether or not film is loaded;
and a second state, and based on a signal from the detection means that detects that the film is not loaded, in the first mode, the film is wound with the leader portion of the film remaining outside the film container. a rewinding stop means for stopping the rewinding operation and, in a second mode, stopping the film rewinding operation with the leader portion of the film completely wound into the film container; and at a predetermined time during the film rewinding operation; A film rewinding device for a camera, comprising selection means for selecting the first mode when the operating means is in a first state and selecting the second mode when the operating means is in a second state.