JP3515717B2 - Camera with data imprint function - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a camera capable of printing photographed data such as shutter speed and aperture value on a film.

[0002]

2. Description of the Related Art In a conventional camera in which shooting data such as shooting date, shutter speed, and aperture value is printed on a predetermined area of the film when the film is running, a method for improving print quality is disclosed in, for example, Japanese Unexamined Patent Publication No. 7-140
There is a method described in Japanese Patent No. 542, in which ISO sensitivity information of a film loaded in a camera is read and the imprinting light amount is adjusted based on the ISO sensitivity to change the imprinting density. However, with this method, the light transmittance set on the film base surface such as reversal film is low, and the light amount set on the basis of ISO sensitivity is not sufficient for a film having a low sensitivity to projection from there, and an appropriate print density is obtained. Was not obtained.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional problems, and in a camera having a function of transferring data from a film base surface side to a predetermined area of the film, the sensitivity and type of the film The purpose is to improve the print quality of the data to be imprinted.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in a camera having an imprinting means for illuminating the light emitting means from the base surface side of the film and imprinting data on a specific area of the film, whether the loaded film is a reversal film or not. If the reversal film detection means has a reversal film detection means for detecting whether or not the reversal film is detected, the reversal film is not detected.
The amount of light emitted from the data imprinting means when
It is characterized in that it is provided with a control means for increasing .

[0005]

Embodiments of the present invention will be described below with reference to the drawings. The camera shown in this embodiment is a single-lens reflex camera equipped with electronic control circuits for exposure control, shutter control, and the like. FIG. 1 is a rear view of a single-lens reflex camera body showing an embodiment of the present invention in a state where a back cover is opened, and shows an arrangement of a data imprinting device when the back cover is further closed. FIG. 2 is a sectional view of the camera taken along the line II of FIG. In FIG. 1, on the left side of the camera body 21, a cartridge chamber 32 for loading a film cartridge containing the film 14 is provided, and on the right side, a spool chamber 33 having a spool 24 for film winding is provided. In the cartridge chamber 32, the rewinding fork 22,
Also, there are two DX contact points 26 for discriminating the DX code on the side of the film cartridge.
Individually arranged. On the left side of the spool chamber 33, a sprocket 25 for detecting perforation is rotatably mounted about its central axis. Further, the shutter unit 16 is provided between the cartridge chamber 32 and the spool chamber 33. Further, there is a connector portion 23 in the lower center of the camera body, and when the back cover 13 is closed, the back cover 13
By making contact with the connecting pin 20 (see FIG. 3), it is possible to exchange electric signals between the camera body and the electric member provided on the back cover 13.

FIG. 3 is a cross-sectional view of the camera body 21 with the back cover 13 closed, seen from the side, taken along section line II-II in FIG. The back cover 13 is provided with a pressure plate 17 and a back cover base plate 18 for maintaining the flatness of the film 14, and the imprinting LED 11 which is a light emitting element for imprinting data between the perforations and the luminous flux emitted from the imprinting LED 11. The imprinting optical system 12 that leads to the imprinting section 12 a is mounted between the back cover 13 and the back cover base plate 18. Imprint LED11
Is an LED corresponding to 7 dots arranged in a straight line. The imprinting optical system 12 has a reflecting surface that makes the arrangement of the data light flux emitted from the imprinting LED 11 in the imprinting position an appropriate direction. Therefore, the imprint LE
The data light flux emitted from D11 is projected from the back surface of the film 14 via the projection optical system 12. A connect pin 20 that contacts the connector portion 23 on the camera body 21 side when the back cover 13 is closed is provided under the back cover 13, and is connected to the imprint LED 11 via a flexible printed circuit board 19. . That is,
Transmission and reception of electric signals from the camera body 21 and the imprinting LED 11 are performed via the connector portion 23, the connect pins 20, and the flexible printed circuit board 19.

FIG. 4 is a top view of the sprocket 25 and its peripheral members as seen from above. Sprocket 25
The four protrusions 30 are arranged at equal intervals in the circumferential direction, and at least one of them is always engaged with the perforation, and the film 14 runs to allow the sprocket 2 to move.
5 is adapted to rotate. Further, the gear 25a of the sprocket 25 is integrated with the brush 29 by the gear 3
1, the rotation of the sprocket 25 is detected by the detection substrate 28 with which the brush 29 is in sliding contact. That is, the rotation of the sprocket 25 causes the brush 29 to rotate.
The output terminals 28a and 28b of the detection substrate 28 are repeatedly short-circuited and opened every time the brush 29 is rotated by a predetermined angle. Since one of the output terminals 28a and 28b is grounded, the other one alternately changes to a high level and a low level (hereinafter, this mechanism is referred to as a film switch 58).
The CPU 34 detects the other level change as a film pulse.

FIGS. 16A and 16B are timing charts when data is imprinted between perforations, showing the film as viewed from the back cover side. There are eight perforations in one frame of film, and seven imprints can be imprinted on the imprinting area during each frame, but in the present embodiment, imprinting at five places is shown. In addition, a character of 7 × 5 dots is printed in 4 characters in the imprint area between 1 perforations.
Imprint characters. The horizontal axis is the time axis and represents the correlation between the position of perforation and the change of each pulse signal. FIG. 16A shows the case of imprinting when rewinding the film, the film traveling direction is from right to left in the figure, and FIG. 16B shows the case of imprinting when winding the film, and the film traveling direction is as shown in FIG. From right to left. The film switch signal is a LOW / HIGH pulse signal generated by short-circuiting and opening the film switch 58, and the position of perforation is detected by this pulse signal. The pulse signal is inverted every time the outermost edge of the perforation passes a predetermined position. This inversion makes it possible to detect which edge has passed the predetermined position. Data is imprinted from the set position based on the position detection. A is the high level time of the film pulse, B is the low level time of the film pulse, and E is the time required for imprinting. At the time of imprinting, in order to correct the deviation between the pulse detection position and the imprinting position, the imprinting start delay time calculated from the time C for converting four imprinted characters into imprinting data and the measured film speed. D
The delay time is set. By setting such a delay time, it is possible to control the start position of imprinting in the imprinting area between perforations.

FIG. 17 is a partially enlarged view of the timing chart shown in FIG. Characters are imprinted by dividing one character of 7 × 5 dots into 5 columns, and the pulse signal period F (imprinting period) set by calculation from the measured traveling speed of the film is 7 dots in one column for each period. Minutes, the imprint time G minutes set from ISO sensitivity information,
This is done by turning on the imprinting LED 11. The character spacing to be imprinted is one dot. Further, since the imprinting is performed using the imprinting cycle calculated from the film speed in this way, the character width becomes constant. FIG. 18 is a view showing a film on which data is imprinted by a camera to which the present invention is applied, as seen from the base surface side (back cover side).

Although not shown, since the camera shown in this embodiment is a single-lens reflex camera, a main mirror for switching between the finder optical system and the photographing optical system is provided.

FIG. 5 is a block diagram of a control circuit of the single lens reflex camera of this embodiment. The control circuit includes a CPU 34 with a built-in ROM / RAM that controls the entire camera. In the CPU 34, a battery 37 as a power source,
It is connected to the DC / DC converter 35 via a voltage regulator 36. Further, the CPU 34 has, as a drive system, a mirror motor 39 for driving a main mirror for switching between the finder optical system and the photographing optical system, and a film motor 41 for winding and rewinding the film 14.
Are connected via motor driver ICs 38 and 40, respectively. As the circuit system, a shutter control circuit 42, an aperture control circuit 43, a data imprinting circuit 52 for controlling data imprinting between perforations, and a DX code identifying circuit 53 for identifying the DX code of the film cartridge are connected. There is. As the sensor system, a photometric IC 46 for automatic exposure control and an AVVR 47 for detecting the position of the diaphragm are connected. As a display and an illumination member, an in-finder LCD 48 for displaying shooting data and the like in the finder, and an in-finder LCD 4
8 illumination LED 49, the shooting mode and film information (remaining number of sheets, ISO
An external LCD 50 for displaying (such as sensitivity) is connected. As the switches, a main switch 61 which is a main power switch, a photometric switch SWS which is turned on when the release button is half-pressed, a release switch SWR which is turned on when the release button is fully pressed, and pulses are generated by running the film. Film switch 58,
A data imprinting permission switch 54 for turning on / off the data imprinting, a back lid opening / closing switch 60 for detecting the open / closed state of the back lid 13, a mirror up switch 56 and a mirror down for detecting the position of the main mirror. A switch 55, a rewind switch 59 for forcibly rewinding, and a film loading switch 57 for determining whether or not a film is loaded are connected. Further, as a storage element, an EEPROM 51 for storing various photographing data, parameters, etc., an oscillator 44 for generating a drive clock of the CPU 34, a clock I for counting date / time.
C45 etc. are connected.

The DX code identified by the DX code identifying circuit 53 has a checkered pattern consisting of a conductive portion (white) and an insulating portion (black) as shown in FIG. 6, and a film is formed by a combination of the conductive portion and the insulating portion. Shows information. The portion indicating the latitude is two portions of the DX code detection sections 81 and 82, and four kinds of latitude are indicated by the combination of the conductive portion and the insulating portion of the two portions. Table 1 shows the latitude of the combination of the conducting portion 0 and the insulating portion 1 for the DX code detection sections 81 and 82. The other part of the DX code indicates the ISO film sensitivity by the combination of the DX code detection sections 72 to 76, and the number of films by the combination of the DX code detection sections 78 to 80.
The DX code detection sections 71 and 77 are grounded.

[0013]

[Table 1] Latitude 81 82 ± 1/2 1 1 ± 1 0 1 +2, -1 10 +3, -1 0 0

The control of this camera will be described below.
FIG. 7 is a flowchart showing the main routine of the single-lens reflex camera to which the present invention is applied. The following processing is executed by the CPU 34. This flow controls the entire camera. The process starts by loading the battery 37, and first, the CPU 34 and peripheral circuits are initialized (S101, S102). The data in the EEPROM 51 is read and loaded into the RAM, and the DC / DC converter 35
Is turned off (S103, S104), and all switch related states (whether each switch is ON or OFF) are input (S
105). Next, it is checked whether the main switch 61 is ON or OFF (S106), and if it is OFF (S106: N), the read switch data is processed and displayed on the external LCD 50 (S107, S108), and the main The interrupt of the switch 61 is permitted (S109), and the low power consumption mode (sleep state) is set until the main switch 61 is turned on (S110). When the main switch 61 is turned on, it returns to the normal mode (S111),
The interrupt of the main switch 61 is prohibited (S112), S105
Return to processing. After that, the processing of S105 to S112 is repeated.

If the main switch 61 is ON (S106:
Y), to prepare for the shooting process, a 250 ms timer is started (S113), and the data of each switch input in S105 is processed and displayed on the external LCD 50 (S114, S11).
Five). Next, it is checked whether the rewind switch 59 is ON. If the rewind switch 59 is ON, the rewind switch 59 is pressed, so the rewind process is executed (S116: Y, S117), S1.
Return to 05. If the rewind switch 59 is OFF, check whether the back cover 13 has changed from the closed state to the open state (S1
16: N, S118), and if the open state is reached, the back lid opening process is executed (S119), and the process returns to S105. If it is not in the open state, it is further checked whether the back cover 13 is changed from the open state to the closed state. If the back cover 13 is in the closed state (S120: Y), the loading process may be performed because the film may have been loaded. Execute (S12
1), return to S105. If the back cover 13 remains closed (S
120: N), whether any of the photometry related switches are ON,
That is, it is checked whether the release button is pressed halfway. If it is not ON (S122: N), the timer interrupt is enabled to save power, and the low power consumption mode (sleep state)
(S123, S124), after 250 ms, return to normal mode (S125), disable timer interrupt (S126),
Return to S105.

If any of the photometry-related switches is ON (S122: Y), that is, if the release button is pressed halfway down, the DC / DC converter 35 is turned ON to prepare for the release process, and the power hold timer is turned on. Set to 80 and start 125ms interval timer (S1
27 ~ S129). That is, the power hold time with the photometry-related switch turned on is set to 10 seconds. And
Input all switches (S130). Then, it is checked whether the main switch 61 is OFF. If the main switch 61 is OFF, there is no need to continue the process any more, so the process returns to S104 (S131: Y),
If it is ON (S131: N), it is checked whether the rewind switch 59 is ON. If it is ON (S132: Y), the process returns to S104 to execute the rewind process, and if it is OFF, it is checked whether the back cover 13 has changed from the closed state to the open state. If it is in the open state, the process returns to S104 to execute the back lid opening process (S133: Y), and if it is not in the open state (S133: N), is the back lid 13 changed from the open state to the closed state? Is checked (S134). If it is in the closed state (S134: Y), the process returns to S104 to execute the loading process, and if it is in the closed state (S134: N), the data that changes depending on ON / OFF of each switch is changed ( S135), photometric calculation (S136), and various data are displayed in the viewfinder LCD 48 and the external LCD 50.
Processing for displaying on (S137). Subsequently, it is checked whether or not the release switch SWR is ON. If it is ON (S138: Y), the release process is executed (S142), and the process returns to S128. If the release switch SWR is OFF (S138: N)
After the lapse of 125 ms (S139), it is checked whether the power hold timer is 0 (S140). If it is not 0, it decrements by 1 (S140: N, S141) and returns to S130 to repeat the processing. If the power hold timer is 0,
Check if any of the metering related switches are ON,
If it is ON (S143: Y), since the release button is still half pressed, the process returns to S130 to prepare for the release process. If it is OFF (S143: N), the process returns to S104.

Here, the release process of S142 will be described with reference to the flowchart of FIG.
In the release process flow, press the release button
That is, this is a flow for executing control of the shutter, aperture, mirror, etc. after the release switch SWR is turned on. When this process starts, the final metering and display process before the release process is performed (S201), and the data for data imprinting (shutter speed, aperture value, exposure compensation value, etc.) is stored in the address corresponding to the film frame number. Write to the EEPROM 51 (S202). Then, mirror up processing, aperture control processing,
Exposure (shutter control) processing, mirror down processing, and mechanical mechanism charging processing are executed (S203 to S205). Then, the film winding process is executed (S206), and if it is the end of the film, the rewind process is executed (S207: Y,
S208). If it is not the end of the film, return (S20
7: N).

FIG. 9 is a flowchart showing the process of imprinting data when the film is rewound. Upon entering this processing, first, the rewind processing variables are initialized (S301). Next, the film motor 41 is rotated in the reverse direction to rewind the film, and the interval timer of 100 μs is started in order to repeatedly execute the processing of S304 to S308 (S302, S303). The edges of pulses (hereinafter referred to as film pulses) generated by running the film are counted (S304). Subsequently, the data imprinting process is executed, and the fact that the rewinding operation is being performed is displayed on the external LCD 50 by the film frame number, the patrone mark or the like (S305, S306). If the film pulse width measurement counter (edge_width_time), which is a counter used to measure the half cycle of the film pulse, is 16000 or more,
1.6 seconds (Film pulse width measurement counter (ed
ge_width_time) increases by 1 every 100 μs)
Check whether it has passed, and if it has not passed (S307:
N), wait for 100 μs to elapse (S308), return to the processing of S304, and repeat the above processing. When 1.6 seconds have elapsed (S307: Y), the rewinding of the film is completed, so the brake is applied to the film motor 41 to make it free (S30
9, S310). Then, the loading end flag (F_LOAD_
Check if OK) is 1. If the loading end flag (F_LOAD_OK) is 1 (S311: Y), since the film has already been loaded, 1 is incremented to the film serial number (ee_film_no) indicating the serial number of the film,
Write to the EEPROM 51 (S312). If the film is not loaded (S311: N) or the film serial number (ee_film_no) incremented by 1 is written to the EEPROM 51, the film end edge number (ee_film_end_edge) which is the film pulse edge number at the film end is set to 0. , Film frame number (ee_film_counter) is set to 0, and EEP
Write to the ROM 51 (S313, S314). Furthermore, the loading normal end flag (F_LOAD_OK) is 0, the film end flag (F_FILM_END) is 0, and the rewind end flag (F_
REW_END) is set to 1 and written in the EEPROM 51 (S315) and the process returns.

Next, the counting of the edges of the film pulse in S304 will be described. FIG. 10 is a diagram showing the flowchart. This flow detects the state of the film pulse (LOW level or HIGH level) every 100 μs,
Each film pulse width measurement counter (edge_width
_time) is a flow for measuring the numerical value, that is, the time from the switching of each state to the next switching. In this process, first, the film pulse width measurement counter (edge_width_time) is incremented by 1 (S401). Then, the previous film pulse state (LO
(W level or HIGH level) is stored, the current film pulse state is read, and the state is stored (S402
~ S403). Then, it is checked whether the current film pulse is at the high level, and if it is at the high level (S404: Y), it is checked whether the previous film pulse is at the low level (S405). If the previous film pulse was high level (S405: N), the film pulse status remains high level, so the process returns as it is, and if it is low level (S405: N).
Y), since the rising edge of the pulse was detected, the film pulse width measurement counter at that point (edge_width_tim
e) is stored as the low pulse width (low_edge_width_time) (S406). That is, the low pulse width (low_edge_w
The time corresponding to idth_time) is the time of the LOW pulse.
Then, the film pulse width measurement counter (edge_width_time) is set to 0 for the time measurement of the next pulse half cycle (S
409). Next, the film end edge number (ee_film_end_edg
It is checked whether e) is 0 (S410). If it is not 0 (S410: N), the film end edge number (ee_film_end_edge) because the edge of the last frame of the film has not yet been reached
Decrement from 1 to return (S412). If it is 0 (S410: Y), the edge counter (edge_counter) is incremented by 1 because it has reached the edge of the last film frame (S411). Next, it is checked whether the edge counter (edge_counter) is 16 (S413), and if it is not 16 (S413: N), the process returns, and if it is 16, eight perforations for one frame of film have passed. because there is,
In order to count the edge of the next film frame, the edge counter (edge_counter) is set to 0, the film frame number (ee_film_counter) is decremented by 1, and the process returns (S414, S415). If the current film pulse is LOW level (S404: N), check whether the previous film pulse is HIGH level. If it is LOW level, return (S407: N). If it is HIGH level (S407: Y), Since the falling edge is detected, the film pulse width measurement counter (edge_width_time) at that time is set to the high pulse width (hig
h_edge_width_time) (S408) and the process proceeds to S409.

Next, the data imprinting process of S305 is shown in FIG.
This will be described in detail with reference to 1, 16 (A) and 17. Figure 1
FIG. 1 is a diagram showing a data imprinting process with a flowchart. First, the data transfer permission switch 54
By checking ON and OFF, it is checked whether the imprinting of the data on the film 14 is permitted. If not, it is not necessary to imprint the data, and the process returns (S501: N), and is permitted. If there is (S501: Y), EEPR
Check whether the film frame number (ee_film_counter) in OM51 is 1 or more, and if it is not 1 or more, return (S502: N) and if 1 or more (S502: Y), the data imprinting start flag (F_PRINT_START) is set. It is checked whether or not it is 1, that is, whether or not data imprinting processing is in progress (S50).
3). If 1 (imprinting process is in progress), the process returns (S503:
Y) If not 1, edge_counter = (print_item_count
er × 2) +4 is checked (S503: N, S504). Here, print_item_counter (data imprinting item counter) is a counter indicating the number of the item to be imprinted on one frame of film. For example, in FIG.
In 6 (A), when AV (aperture value) is imprinted in the area between the third and fourth perforations, print_item_c
Since ounter = 1, edge_counter = 6. That is, if 6 edges are counted, perforation 3
The process of imprinting into the area between No. 4 and No. 4 is started.
If the check result is N, it returns (S504: N), and if it is Y (S504: Y), conversion / setting of imprinted data (S505)
(Details will be described later). The data written in the EEPROM 51 in S202 is converted into the actual imprinted data.

Next, the imprinting start delay time (S506) and the imprinting cycle (S507) are calculated and set. The formula for calculating the imprint start delay time is: reference delay time × (measured film pulse HIGH time / reference film pulse HIGH time). The reference delay time is the imprint start delay time that is set so that the imprinting starts from a predetermined position at the arbitrarily set film reference speed.The reference film pulse HIGH time is the high pulse width at the same reference speed. Is. Also, the measured film pulse HIGH time is S408
Is the high pulse width (high_edge_width_time) of. The reference delay time and the reference film pulse HIGH time are predetermined.
It is stored in the EEPROM 51. The calculation formula of the imprinting period is: reference period x (measurement film pulse high time / reference film pulse high time). The reference period is the imprinting period that is set to have a predetermined character width at the arbitrarily set film reference speed, and the measured film pulse HIGH time is the high pulse width (high_edge_width_time) of S408. And the reference film pulse HIGH time are determined in advance by EEPROM
It is stored in 51. By rewriting the numerical values of the reference delay time and the reference period stored in the EEPROM 51, it is possible to easily change the imprint start position and the character width.

Then, the imprinting time is set (S508),
Set print_counter = 0 (S509). The print_counter (imprint dot row counter) is a counter that obtains the number of rows of imprint data imprinted in the film running direction. Next, the interruption of the timer 1 is enabled, the imprinting start delay time timer that delays the imprinting start in order to imprint from a desired position is started, the data imprinting flag is set, and the process returns. S510 ~
S512).

Here, the setting of the imprinting time of S508 will be described. FIG. 15 is a diagram showing the flowchart. This flow is a flow in which the data imprinting time is determined based on the film sensitivity of the loaded film, whether or not it is a reversal film is determined from the latitude information, and if it is a reversal film, additional correction is performed. When this flow is entered, it is first checked whether the film has a DX code (S901). Whether or not it has a DX code is determined by whether or not the DX code display area of the film cartridge contacting the DX contact 26 is all an insulator. If it is not an insulator, it is determined that the film has a DX code. . If the camera has a DX code (S901: Y), the imprinting time is calculated according to the ISO sensitivity obtained by detecting the DX code (S902). The calculation formula is as follows. In addition, the numerical value with the symbol H is displayed in hexadecimal.

[Equation 1] Here, SvD is a value obtained by converting the ISO speed SV of the film to facilitate calculation. Table 1 shows an example of the relationship between the ISO sensitivity and the imprinting time.

[Table 2]       ISO SvD (H) Imprint time (μS)         25 10 400         32 13 351         40 15 322         50 18 283         64 1B 248         80 1D 228        100 20 200        125 23 176        160 25 161        200 28 141        250 2B 124        320 2D 114        400 30 100        500 33 88        640 35 81        800 38 71       1000 3B 62       1250 3D 57       1600 40 50       2000 43 44       2500 45 40       3200 48 35       4000 4B 31       5000 4D 28

Next, it is checked whether the loaded film is a reversal film, and if it is a reversal film (S904: Y), the imprinting time is doubled for correction (S90: Y).
5), return. This is because the base of the reversal film has a low light transmittance and a low sensitivity, so that it is necessary to increase the exposure amount when the image is projected from the base surface side. Whether or not the film is a reversal film is determined by detecting the latitude of the loaded film and using that latitude. That is, since the latitude of a reversal film is generally narrow, the latitude is ± 1 /
If it is 2, it is determined to be a reversal film. If it is not a reversal film (S904: N), since it is a negative film, there is no need to correct it and the process returns as it is. If the loaded film is not a DX coded film (S9
01: N), based on the ISO sensitivity set by the user, the imprinting time is calculated in the same manner as the above calculation (S903), and the process returns. For example, in the case of a negative film of ISO100, the imprinting time is 2 as it is from the calculation result of Equation 1.
It is set to 00 μS (S902). In the case of the ISO100 reversal film, the imprinting time is calculated to be 200 μS by the calculation of Expression 1 (S902), and is doubled to 400 μS by correction. In the illustrated embodiment, when the reversal film is loaded, the imprint density is adjusted by extending (double) the data imprinting time as compared with the value when the film is loaded.
The configuration may be such that the emission brightness (intensity) of the ED is increased (doubled).

Now, the interrupt processing routine of the timer 1 will be described. FIG. 12 is a flowchart showing the interrupt processing of the timer 1. This flow is an interrupt processing routine for turning on the copy LED 11 in order to copy the data after the interrupt of the timer 1 is permitted in S510 of FIG. In this process, first, the interrupts of timer 1 and timer 2 are prohibited (S601, S602). Then, it is checked whether print_counter = 23 (S60
3). In this embodiment, four characters each having a width of 5 dots are printed in one perforation (see FIG. 17), and 23 dots are checked including one dot between the characters. If print_counter = 23, the imprinting to one inter-perforation area is completed, so the imprinting LED 11 is turned off (S605),
The data imprinting start flag (F_PRINT_START) is set to 0 (S606), that is, the data imprinting flag is erased and the process returns. If print_counter is not 23 (S603:
N), the LED to be turned on that is set in S505 and corresponds to the value indicated by the imprinted dot row counter (print_counter)
The LED 11 is turned on based on the data of (S60
Four). Next, the imprint dot row counter (print_counte
1 is incremented to r) and timer 1 interrupt is enabled in preparation for the imprinting of the next dot row (S607, S60
8). Then, the imprinting cycle timer set in S507 is started, the interruption of the timer 2 is enabled, and the timer corresponding to the imprinting time set in S508 is started (S609 to S611). The interrupt processing routine of the timer 2 is shown in the flowchart of FIG. This flow shows the imprinted LED 1 that is turned on in the interrupt processing routine of the timer 1.
It is an interrupt processing routine for turning off 1. This process is a two-step process of turning off the imprinting LED 11 and disabling the interruption of the timer 2 (S701, S702).

The imprinted data conversion / setting process of S505 will be described. FIG. 14 is a diagram showing the flowchart. First, the data imprinting item counter (print_it
Check the value of (em_counter) (S801). If it is 0, the TV data (shutter speed) corresponding to the numerical value of the film frame number (ee_film_counter) is converted and set among the various data stored in the EEPROM 51 during the release process (S802). If it is 1, AV data (aperture value) is also obtained.
Is converted and set (S803). If it is 2, the XV data (exposure correction value) is similarly converted and set (S804). If it is 3, the exposure mode data is similarly converted and set (S80
Five). If it is 4, convert the film number data in the same way.
Set (S806). After converting and setting each data,
In order to convert and set the data of the next item, the data imprinting item counter (print_item_counter) is incremented by 1 (S809). Data imprinting item counter (prin
If (t_item_counter) is not 5, the data to be imprinted still remains, and the process directly returns (S810: N). Then, the data imprinting item counter (print_item_count
If er) is 5 (S810: Y), there is no more data to imprint, so the data imprinting item counter (prin
Set t_item_counter) to 0 (S811) and return.

In the above embodiment, the case where the data is imprinted when the film is rewound has been described, but the data imprinting may be performed when the film is wound. FIG. 16B shows a timing chart in the case of imprinting data between perforations when the film is wound. FIG.
As in (A), A is the high level time of the film pulse, B is the low level time of the film pulse, C is the time to convert to imprint data, D is the imprint start delay time, and E is the imprint. It shows the time required. Further, although the case where the data is imprinted in the area between the perforations is shown, the present invention can be applied to the case where the data is imprinted in another area of the film surface.

[0028]

As is apparent from the above description, according to the camera to which the present invention is applied, the reversal film detection means detects the reversal film when data such as photographing data is imprinted on the film surface from the base surface side of the film.
Reversal film
When the data imprinting means is not detected,
Equipped with a control unit that increases the amount of light emitted rather than the amount of light , it is possible to print at the optimum density according to the sensitivity of the loaded film, and especially reversal film with low sensitivity for imprinting from the film base surface. However, it is possible to capture with an appropriate amount of light.

[Brief description of drawings]

FIG. 1 is a rear view of a camera to which the present invention has been applied with a back cover opened.

2 is a cross-sectional view of the camera taken along line I-I of FIG.

3 is a cross-sectional view of the camera taken along line II-II of FIG.

FIG. 4 is a top view of a perforation detection unit of a camera to which the present invention has been applied.

FIG. 5 is a block diagram of a control circuit of a camera to which the present invention has been applied.

FIG. 6 is a diagram showing a detection division of a DX code.

FIG. 7 is a diagram showing a program of a main routine of a camera to which the present invention is applied, with a flowchart.

FIG. 8 is a diagram showing a control program of a release process of a camera to which the present invention is applied with a flowchart.

FIG. 9 is a diagram showing a flow chart of a control program for imprinting data at the time of film rewinding of the camera to which the present invention is applied.

FIG. 10 is a diagram showing a flow chart of a control program for counting the edges of film switches of a camera to which the present invention has been applied.

FIG. 11 is a diagram showing a data imprinting process of a camera to which the present invention is applied with a flowchart.

FIG. 12 is a diagram showing a flowchart of interrupt processing of timer 1.

FIG. 13 is a diagram showing a flowchart of interrupt processing of timer 2.

FIG. 14 is a diagram showing a flowchart of a process of converting / setting imprint data.

FIG. 15 is a diagram showing a flow chart of a control program for setting the data imprinting time of the camera to which the present invention is applied.

FIG. 16A is a diagram showing a correlation between perforation and each pulse signal at the time of film rewinding of the camera to which the present invention is applied, with a timing chart when the film is viewed from the case back side. . (B) is
It is a figure which shows the correlation of perforation and each pulse signal at the time of film winding of the camera to which this invention is applied with the timing chart in the state which looked at the film from the back cover side.

FIG. 17 is an enlarged view of a main part of the timing chart shown in FIG.

FIG. 18 is a diagram showing a film on which data is imprinted by a camera to which the present invention is applied, as seen from the back cover side.

[Explanation of symbols]

11 Imprinted LED 12 Imprinting optical system 12a Imprinting part 13 case back 14 films 16 Shutter unit 17 Pressure plate 18 Back lid base plate 19 Flexible printed circuit board 20 Connect Pin 21 body 22 Rewinding fork 23 Body side connector 24 spools 25 sprockets 25a gear 26 DX contact 28 Detection board 28a 28b Output terminal 29 brushes 30 protrusions 31 gears 32 cartridge chamber 33 spool room 34 CPU 35 DC / DC converter 36 Voltage Regulator 37 battery 38 Motor driver IC 39 Mirror motor 40 Motor driver IC 41 film motor 42 Shutter control circuit 43 Aperture control circuit 44 oscillator 45 Clock IC 46 IC for photometry 47 AVVR 48 LCD in viewfinder 49 Lighting LED 50 External LCD 51 EEPROM 52 Data imprinting circuit 53 DX code identification circuit 54 Data imprinting permission switch 55 Mirror down switch 56 Mirror up switch 57 Film loading switch 58 film switch 59 Rewind switch 60 Back cover open / close switch 61 Main switch 71-82 DX code detection classification SWR release switch SWS metering switch

Continuation of the front page (56) Reference JP 59-228234 (JP, A) JP 57-200026 (JP, A) JP 57-79934 (JP, A) JP 9-65139 (JP , A) Actual development 61-143136 (JP, U) Actual development 59-192130 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 17/24 GAP G03B 7/24

Claims (6)

(57) [Claims] 1. A camera having an imprinting means for imprinting data on a specific area of the film by illuminating the light emitting means from the base surface side of the film, and detecting whether or not the loaded film is a reversal film. Having a reversal film detection means, when the reversal film detection means is detected to be a reversal film, a reversal film and
Light emission of the data imprinting means when not detected
A camera with a data imprinting function, which is equipped with imprinting control means for increasing the light emission amount more than the amount . 2. The camera with a data imprinting function according to claim 1, further detecting the loaded film sensitivity.
A film sensitivity detecting unit for detecting the light emission time of the light emitting unit according to the film sensitivity detected by the film sensitivity detecting unit, and detecting that the reversal film detecting unit is a reversal film. Then, a camera with a data imprinting function that multiplies the light emission time by n times . 3. The camera with data imprinting function according to claim 1, further detecting the loaded film sensitivity.
And a film sensitivity detecting means for calculating the light emission intensity of the light emitting means according to the film sensitivity detected by the film sensitivity detecting means, and detecting that the reversal film detecting means is a reversal film. Then, a camera with a data imprinting function that multiplies the emission intensity by n times . 4. The data imprinting according to claim 2 or 3.
In cameras with only functions, the n-fold data is doubled.
A camera with an imprinting function. 5. The function camera data imprinting according to any one of claims 1 to 4, wherein the reversal film detecting means, whether the reversal film to detect the latitude of the loaded film A camera with a data imprinting function for determining . 6. A camera with a data imprinting function according to claim 5, wherein the reversal film detecting means comprises:
The latitude information is read from the DX information formed on the surface of the film cartridge loaded in the camera, the latitude of the film is detected, and the detected latitude is detected.
Reversal film whether determination data imprinting function camera based on Yudo.