JPH07209730A - Data recorder for camera - Google Patents

Abstract

PURPOSE:To provide a data recorder for a camera capable of vividly recording characters or data in accordance with the kind of the material of a film base. CONSTITUTION:A film kind setting switch 10 for changing exposure time to record the character, marks such as a symbol and a binary code in accordance with the kind of the material of the film base is connected to a microcomputer 5. The switch 10 is provided on the outside of the camera, so that a photographer switches the recorder according to whether the material of the film base is A-PEN or substance other than A-PEN.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording device for a camera which records various data on a film while feeding one frame of the film.

[0002]

2. Description of the Related Art Exposure control data such as shutter speed and aperture value at the time of shooting, or whether or not strobe light is emitted, trimming data set by a user at the time of shooting, etc. are recorded in a film, and these writing data are printed. At this time, attempts have been made to read the data and use it for exposure control during printing, trimming, and determination of print magnification. To write such data on the film being fed, either magnetic recording method or optical recording method is possible, but the data can be surely left without being affected by the storage environment. Further, the optical recording method is excellent in that the data itself can be visually confirmed, that the magnetic recording layer is not provided on the film, and that the structure of the recording device incorporated in the camera is simple.

When data is recorded on a film, digital recording is advantageous in order to minimize writing errors and reading errors. Therefore, in order to perform digital recording by the optical recording method, the write data is represented by a binary code of a plurality of bits, and the LE is synchronized with the feeding of the film.
The binary code may be expressed by a combination of an exposed area and a non-exposed area by controlling the blinking of the light emitting element such as D. When the film thus photographed is developed, the exposed area and the unexposed area appear as a visible binary code pattern, which can be read using a photosensor or the like.

However, the data recorded on the film is 2
If it is represented only by a hexadecimal code, its contents cannot be grasped only by visually observing it. Therefore, when printing from the film on which the above data is recorded,
Even if the printer has various input keys, the data recorded by the camera cannot be used at all without a dedicated data reading device, and efficient print processing cannot be performed. Also, it is very convenient for the user side to visually judge the data at the time of shooting each frame when observing the negative film having undergone the development process, but even in this case, a dedicated reading device is still required.

In order to solve such a problem, not only the data to be optically recorded on the film is recorded by a binary code, but also the data represented by the binary code is recorded as a mark which can be visually confirmed. A data recording device for a camera has been proposed which is capable of recording such a mark and which also serves as a recording means for recording a binary code to reduce the cost burden.

As such a data recording device for a camera, for example, Japanese Patent Application No. 4-21 proposed by the present applicant.
According to the specification of US Pat. No. 368, a plurality of light emitters are aligned orthogonally to the feeding direction of the film, and the plurality of light emitters are controlled to blink at the same time during one frame advance period of the film after photographing. A binary code is recorded in the form of a bar code on the edge portion of the memory, and a memory storing the font data of the mark representing the content of the binary code is provided, and the font data representing the content of the binary code to be recorded is described above. A plurality of light emitters are selectively turned on and off during a period in which the read from the memory does not overlap with the recording of the binary code, and the binary code and the mark indicating the content can be recorded at the edge portion of the film. is there.

Further, the recording control means is provided with an external input section, and the marks such as characters, symbols, and figures arbitrarily input by the user are recorded on the film by using the plurality of light-emitting bodies. The mark can be used for shooting memos and the like.

By the way, the light condensed on the film surface via the optical system of the camera is not only exposed to the condensed area on the film, but also the periphery thereof. This is because the light diffuses from the collected area to the surroundings through the film base. As a result, the diffused light may be exposed to the adjacent exposure area, which may make the characters indistinguishable or the data indistinguishable.

Originally, when recording fine characters or recording high-density digital codes or the like, it is desirable that the distance between adjacent areas is as short as possible. The minimum interval of is determined by the degree of light diffusion of each base film.

[0010]

In recent years, polyethylene naphthalate (PEN) has been used as a base material for films.
Is attracting attention. This PEN is PET (polyethylene terephthalate) or TAC (triacetyl cellulose) which has been conventionally used as a base material for films.
Compared with the above, it has excellent properties such as excellent elasticity, difficulty in bending, and high tensile strength.

Further, by heat-treating this PEN at a glass transition temperature or lower, strain inside PEN is removed, that is, so-called annealed PEN (hereinafter referred to as A-PEN).
When used as the base material of the film,
It has a very desirable property as a base material of a film, that is, it has almost no curl even if it is left for a long time in a rolled state. Therefore, the present applicant has also proposed a film using this A-PEN. However, this A-PEN is PET, T
There is a drawback that light is more likely to diffuse in the resin than AC.

Therefore, the minimum distance between the adjacent regions as described above has to be relatively long as compared with the film using PET or TAC, and the film using A-PEN has to be used. When recording data, PET, TAC
If the data was recorded at the same intervals as the film using, the recorded characters and codes would not be discernible.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a data recording device for a camera capable of clearly recording characters and data according to the type of material of the film base. To do.

[0014]

In order to achieve the above object, the present invention arranges a plurality of light emitters orthogonal to the feeding direction of a film, and the plurality of light emitting members are arranged in a film one frame feeding period after photographing. The illuminants are controlled to blink at the same time to record a predetermined binary code on the edge portion of the film in the form of a bar code, and the font data of the mark representing the content of each binary code is read from the memory. In a data unit for a camera, which controls blinking of the plurality of light emitters to record a mark representing the content of the binary code on an edge portion of the film during a period which does not overlap with the recording of the binary code, a unit of the film is provided. The lighting time of the plurality of light emitters with respect to the movement amount per time is made different depending on the material of the base of the film.

In the second aspect, the material of the base of the film is polyethylene naphthalate (PEN).
When the film is made of polyethylene terephthalate (PET), the lighting time of the plurality of light emitters with respect to the moving amount of the film per unit time is determined.
Alternatively, the length is made shorter than that of triacetyl cellulose (TAC).

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 schematically showing the basic structure of a camera using the present invention, a film winding motor 3 is built in a take-up spool 2, and this motor 3 is supplied from a microcomputer 5. Motor driver 6
Driven by. At the time of shooting, the drive transmission mechanism 7 is switched for winding up by a command from the microcomputer 5, and the motor 3 is driven when an exposure completion signal is input to the microcomputer 5 after shooting. The driving force of the motor 3 is transmitted to the take-up spool 2 via the drive transmission mechanism 7, and the film 8 is taken up by the take-up spool 2.

A reflective photosensor 11 for detecting the passage of the perforation 8a of the film 8 is used for the constant-length feeding control of the film 8. When the film winding is started, the photo sensor 11 turns the film 8
The reflected light is monitored while irradiating infrared light on the. Then, the photo sensor 11 causes the perforation 8
When a is detected, the perforation signal generator 12
The PF pulse is input to the microcomputer 5 from.

Upon receiving the PF pulse, the microcomputer 5 sends a stop signal to the motor driver 6, and the motor 3
To stop momentarily. In the illustrated embodiment, since the film 8 is provided with one perforation 8a per frame, the film winding may be stopped when the photosensor 11 detects the perforation 8a. Incidentally, in the case where eight perforations are arranged per frame like the 135 film so far, the number of PF pulses similarly detected by the photosensor 11 is counted, and the number becomes eight. Film winding can be stopped when

The leading end of the film 8 is provided with three to four perforations 8b side by side, which is for locking the leading end of the film 8 to the claw of the take-up spool 2. Further, the photo sensor 1 detects the passage of these perforations 8b during film loading.
It is also possible to confirm whether the film loading is suitable or not depending on whether or not the intermittent PF pulse is obtained within a predetermined time by monitoring with No. 1.

A driven roller 14 is further in contact with the film 8, and the film 8 is rotated without being slipped by the feeding of the film 8 at the time of winding the film. An encode plate 15 is connected to the driven roller 14 and rotates integrally with the driven roller 14. The encoder plate 15 is a circular plate in which slits are radially formed at a constant pitch, and its rotation is monitored by a photo interrupter 16. An encode pulse generator 17 is connected to the photo interrupter 16, and an ENC pulse is input to the microcomputer 5 every time the photo interrupter 16 detects a slit of the encode plate 15. As described above, the driven roller 14 is the film 8
Since it is driven and rotated, the ENC pulse is generated every time the film 8 reaches a certain feeding length.

A data recorder 20 is provided outside the frame of the exposure aperture 19 of the camera. As shown in FIG. 2, the data recorder 20 comprises an LED head 21 and a lens 22 for image capturing. LED head 21
Is an array of eight LEDs 21a to 21h orthogonal to the feeding direction of the film 8 (direction perpendicular to the paper surface). The first bit LED, the second bit LED,
--- It is an 8th bit LED. This allows
8-bit data can be recorded. LE
The D head 21 is driven by the LED driver 23 for each timing pulse supplied from the microcomputer 5 during the film winding period after photographing. Also L
When the ED head 21 is driven, the microcomputer 5
Print pattern data is also supplied to the LED driver 23.

A film type setting switch 10 for changing the lighting time of the LED head 21 for recording marks such as characters and symbols and binary codes depending on the type of material of the film base is connected to the microcomputer 5. There is. The film type setting switch 10 is provided on the upper surface of the camera 1 as shown in FIG. 12, and can be switched by the photographer depending on whether the material of the film base is A-PEN or another material. .

A data ROM 24 is provided to drive the LED head 21 and record marks such as characters and symbols (hereinafter referred to as captions) and a binary code. The data ROM 24 is a font data storage unit 24.
a and a binary code data storage unit 24b. The font data storage section 24a stores font data in which dots are arranged corresponding to a caption pattern to be recorded, and desired font data can be obtained by using a well-known ASCII code (CHARA) as an index. The binary code data storage unit 24b stores, for example, each bit data of a binary code corresponding to each trimming data set at the time of shooting.

The font data and the binary code data are called in the recording order at the beginning of the recording process.
It is sent to the LED head 21. Program ROM
25 stores a program for executing the photographing sequence and the above-mentioned data recording sequence. RA
The M26 is used as a storage area for input data when it is externally operated by a user, and a work area for temporarily storing data and flags necessary for performing a shooting sequence and a data recording sequence. Frame counter 2
7 counts the number of frames taken by the film 8.

At the time of recording captions, the character codes stored in the buffer memory 18 are read in the order of recording. The read character code is the data RO
The font data is converted into font data in contrast with the font data storage unit 24a of M24, and this font data is transferred to the LED head 21. FIG. 3 shows the LED head 21.
Marks for headings (hereinafter referred to as captions)
"P" is recorded as a pattern, and the font data is "8 columns x
It is represented by a dot pattern of "8 lines".

A line number of the font data matrix is associated with each of the LEDs 21a to 21h, and one line (R) is provided for each input of the timing pulse described above.
OW) font data is sent to the LED head 21. Each of the font data is represented by either "0, 1", and the LED to which the font data "1" is transferred is turned on by the input of a timing pulse to give a dot-like exposure to the outside of the effective screen of the film 8, When the font data "0" is transferred, the LED does not light even if a timing pulse is input. Then, the LED to which the font data “1” has been transferred is turned on after being turned on for a lighting time T described later.

When the binary code is recorded by using the LED head 21, the photographic data read from the buffer memory 18 is compared with the binary code data storage section 24b of the ROM 24, and the binary data corresponding to the photographic data is obtained. Code data is supplied to the LED head 21 bit by bit. Then, each of the LEDs 21a to 21h is turned on or off at once in correspondence with the binary code data.
For example, when the binary code to be recorded is represented by "10", the data of "1" of the first bit is LEDs 21a-2.
All LEDs are simultaneously supplied for 1h, and these LEDs are simultaneously turned on for T time by the input of the timing pulse, the 1st bit is recorded, and the 2nd bit "0" data is LE.
All LEDs are supplied to D21a to 21h all at once, and even if a timing pulse is input, all the LEDs remain off.

The recording mode setting unit 30 and the caption input setting unit 3 are set so that the user can arbitrarily set the recording of the caption and the recording of the binary code.
1 and are provided. The recording mode setting unit 30 includes a knob 30a that can be operated by the user from outside the camera body,
A recording code of either "00" or "01" representing an arbitrary input mode or a normal mode is input to the microcomputer 5 according to the set position. The caption input setting unit 31 is activated when the arbitrary input mode is set, and can be arbitrarily set by the user from, for example, characters or marks with well-known ASCII codes.

FIG. 4A conceptually shows the film when recording is performed in the arbitrary input mode "00".
The caption selected by the user is recorded outside the screen of the shot frame. Of course, it is also possible to select a number string representing the shooting date and time as this caption. When the user selects the caption to be recorded, a dedicated key for selecting the caption is provided, or the key for setting the shooting condition is made to have a dual function, and the caption is displayed on the liquid crystal display section every time these keys are operated. May be displayed one by one in sequence, and the display may be confirmed and determined when the set key is operated. In addition,
The upper limit of the number K of selected captions is, for example, “16”, and further caption selection operations are invalidated.

When recording is performed in the normal mode "01",
As shown in FIG. 4B, in addition to the binary code corresponding to the trimming data set at the time of shooting being recorded as a barcode, a caption representing the trimming data is recorded before the binary code. For example, a frame in which the caption "H" is recorded means that the frame is a filmed image on the assumption that the area surrounded by the broken line (the same aspect ratio as that of the high definition TV) is printed, and the caption "H" is also recorded. ", The trimming data is automatically recorded as a binary code. Note that the caption "P" represents panoramic trimming, and similarly, the trimming data is recorded as a binary code after the caption.

Therefore, when a printer having a binary code reader is used for print processing, the trimming printing can be automatically performed by reading the binary code, and the caption can be visually observed with a printer having no reader. Trimming prints by manual operation. By visually observing the caption on the negative film, the user can easily know the size of the print photograph of the frame printed. The caption and binary code to be recorded on the film are not limited to those related to the trimming data described above, but also exposure condition data such as shutter speed, aperture value, and whether or not a strobe is used.
It is possible to record various data such as shooting distance data and shooting lens focal length data.

On the terminal side of the film 8, 3 to 4 perforations are arranged at short intervals, similarly to the leading side. Then, when film winding is started after shooting the last frame, the ENC pulse is counted and the film 1 is counted.
When the photo sensor 11 intermittently detects the perforation before reaching the feeding length for the frame, the drive transmission mechanism 7 is switched for rewinding by a command from the microcomputer 5. As a result, the drive shaft 27 is rotated in the rewinding direction by the motor 3, and the film 8 which has been photographed has been photographed.
Is caught in the cartridge 28. The completion of rewinding can be detected based on the signal from the photo sensor 11.

The data recording function of the camera configured as described above will be described in more detail. FIG. 5 shows a PF pulse obtained when winding one frame of the above camera,
The timing of generation of the ENC pulse is shown. When the exposure completion signal is input to the microcomputer 5, the motor 3
Is rotated to wind the film, and the driving of the motor 3 is stopped when the PF pulse is obtained. Then, when the winding of one frame is started, ENC is performed for each fixed film feeding length.
A pulse is generated, and a certain number of ENC pulses are generated until the winding of one frame is completed. Assuming that the number of ENC pulses generated during one frame feeding is 10, when recording 10-bit data during one frame feeding, EN
By driving the data recorder 20 at each generation timing of the C pulse, the unit bit length at each bit position can be kept constant.

However, when the amount of data to be recorded during feeding one film is large and 10 bits is insufficient,
Especially when data recording for a plurality of bits is required within the pulse interval of the ENC pulse, the ENC pulse itself cannot be used as a timing pulse for data recording. In such a case, the clock pulse obtained from the microcomputer 5 must be used for temporal control, but the winding diameter of the film 8 wound on the take-up spool 2 as the photographing progresses. As the thickness increases, the feeding speed of the film 8 increases, as shown in FIG. For this reason, the time ΔS required to wind one frame becomes shorter as the number of photographed images increases. Therefore, for example, the number of clock pulses is counted with reference to the time of generation of the exposure completion signal, and the number of clock pulses of the data recorder 20 is calculated based on the counted value. It is also impossible to determine the drive timing.

Therefore, as shown in the timing chart of FIG. 6 (when the normal mode is "01"), the above-mentioned EN
The timing of generation of the timing pulse for driving the data recorder 20 is determined from both the C pulse and the time corresponding to the count value of the clock pulse. When the exposure completion signal is input to the microcomputer 5 to start the film feeding, an ENC pulse is generated every time the film 8 is fed for a certain length. The number of the generated ENC pulses is sequentially counted as the count value M, but as shown in FIG. 5, the ENC pulse generation time interval is constant during the film feeding start period when the rotation of the motor 3 is unstable. I haven't done so
M ₀ ENC pulses (“M ₀ = 4” in this embodiment)
It does not record data until it reaches.

Each time the ENC pulse is detected, the pulse interval D from the ENC pulse detected last time is measured and updated each time. The pulse interval D becomes shorter as the number of ENC pulses increases, and the ENC count value M
The motor 3 is in a substantially constant-speed rotation state at the time when becomes "4".

At the time when the ENC count value M reaches "4", the microcomputer 5 determines the predicted pulse interval Pre.Pre. Between the ENC pulse detected this time and the ENC pulse to be detected next. D is obtained by a prediction calculation. This prediction calculation is obtained by multiplying the pulse interval D between the third ENC pulse detected last time and the fourth ENC pulse detected this time by “0.9”. "0.
The meaning of multiplying by “9” is that the rotation speed of the motor 3 may be increased when the rotation speed of the motor 3 shifts to a complete constant-speed rotation range, and the feeding speed of the film tends to be increased due to the winding of the film. Because it has When these influences are small enough to be ignored, the value of the pulse interval D is directly used as the predicted pulse interval Pre. It may be D.

Predicted pulse interval Pre. When D is obtained, the unit bit recording time ΔD is obtained by dividing by the number of recording bits N ₀ during the pulse interval of the ENC pulse. The film type coefficient Z is set according to the material of the film base selected by the film type setting switch 10. This film type coefficient Z is, for example, “Z = 0.
7 ”, for film bases made of other materials,“ Z =
1 ”. Then, based on the film type coefficient Z, the LED 21a at the time of caption or binary code recording
The actual lighting time of ~ 21h is determined.

In the recording in the normal mode "01", one caption representing the trimming data is recorded by eight timing pulses generated after the ENC count value "M = 4" as shown in FIG. To be done. After this caption recording is completed and a space period for one ENC pulse has elapsed, a binary code is recorded. Of course 2
The timing pulse during the value code recording period is calculated based on the pulse interval D ₅ of the ENC pulse during the space period. It should be noted that this space period is not always necessary, and several bits immediately after the start of recording the binary code is allocated to the known start bit recording period.

FIG. 7 shows a main flow showing a basic sequence of film feeding. When the exposure completion 00 is input to the microcomputer 5, the B flag which allows the recording of the caption or the binary code is set to "1". Then, the above-mentioned ENC count value M is reset to "0", and while updating the pulse interval D of the ENC pulse and counting the ENC pulse, "M
= M ₀ ”, a standby state is set until recording starts. "M = M
_When it becomes " ₀ ", the data recording process is performed after confirming that the B flag is "1". After the recording is completed, the B flag is reset to "0", and the recording sequence is completed after the detection of the PF pulse.

FIG. 8 shows the flow of data recording processing. At the start of the data recording process, the recording mode is first confirmed. In the arbitrary input mode "00", the input data set in the RAM 26 by the user is converted into the character code (CHARA) of the corresponding caption, which is stored in the buffer memory 18 in order. An address pointer “BC” is assigned to each of the character codes stored in the buffer memory 18, and this address pointer “BC” is assigned when reading font data.
The column number “ROW” is used as an index, and the character font data is supplied to the LED head 21 for each column.

On the other hand, the recording mode is the normal mode "0.
When it is “1”, shooting data is stored in the buffer memory 18 in addition to the character code of the caption,
As shown in the timing chart of FIG. 6, after the caption recording, the binary code is recorded after the passage of the space period. The recording position of the caption may be set to the rear side or the middle part of the binary code, and the space period may not necessarily be provided.

The flowchart of FIG. 9 shows the processing at the time of caption recording. When recording captions, first, the character code (CHAR
Read the number of characters K by referring to A). Then, the address pointer BC and the address pointer "ROW" for designating the column number of the font data are set to the initial value "1".

Next, the calculation of the unit bit recording time ΔD described with reference to FIG. 6 determines the cycle of the timing pulse, and further, the LED to which the font data “1” is transferred.
The lighting time T, which is the time when the light is actually turned on, is calculated.
The lighting time T is determined based on the setting of the film type setting switch 10 described above, and the value obtained by multiplying the film type coefficient Z already set by the film type by the unit bit recording time ΔD is the LED actually lighting. The lighting time T is set to ON. As described above, the film type coefficient Z is set to "Z = 0.7" for the A-PEN base film and "Z = 1" for the film bases made of other materials. It

When the lighting time T is calculated, the first character code (C
HARA) is read from the buffer memory. Further, by referring to the data ROM 24, the character code (CHA
Among the font data of the caption “8 × 8” represented by RA), the font data of the first column represented by “ROW = 1” is supplied in parallel to the LEDs 21a to 21h,
LEDs 21a to 21h upon input of the first timing pulse
Is driven only during the lighting time T.

FIG. 10 is an explanatory diagram showing how the actual blinking of each LED changes depending on the type of film base. This figure is an example of recording the letter "N", but in the case of films other than A-PEN,
The lighting time T1 of each LED is operating almost every cycle of the timing pulse, but in the case of A-PEN film, the lighting time T2 at which the LED to which the font data “1” is transferred is actually turned on is It can be seen that the timing pulse is about two-thirds of one cycle. By changing the lighting time T according to the setting of the film type setting switch 10, the A-PEN base film is exposed for a shorter period of time than the film bases of other materials, and thus the base material is exposed. It is possible to eliminate the influence of excessive diffusion of light due to the difference.

Recording is repeated in this way, and "BC =
The recording process of the caption is completed when the recording of “K” is performed. The recording mode is the normal mode "01".
If it is, only one caption is recorded because “K = 1”. Further, even during the caption recording period, the unit bit recording period ΔD is updated when the ENC pulse is obtained.

FIG. 11 shows the processing when the binary code is recorded. The binary code recording is started after the bit number pointer "N" is set to the initial value "1" after the total bit number "L" of the binary code to be recorded is read. Then, the binary code data corresponding to the photographing data is read from the data ROM 24 every time the timing pulse is input, and the same binary data of "0" or "1" is simultaneously supplied to the LEDs 21a to 21h for recording. . In this way, the recording proceeds in bit order, and "N = L" is set, and the recording process for all the bit positions is completed. Of course, ENC
The point that the unit bit recording time ΔD is updated when the pulse is obtained, the unit bit recording time ΔD is multiplied by the film type coefficient Z set according to the film type to calculate the lighting time T, etc. The same as when recording captions. In this way, when the LEDs 21a to 21h are driven for the lighting time T under the same binary data "0" or "1", a bar code is formed on the film 8 as shown in FIG. The binary code is recorded as a latent image.

When the data recording is completed as described above, the B flag is reset to "0" as shown in the flowchart of FIG. 8, and the film 1 for that frame is set.
Recording will not be performed again until the frame feeding is completed. During this period, the number of ENC pulses is counted.

The film winding progresses, and when the PF pulse is detected, the motor stops and the film one frame winding is completed. The ENC pulses generated during the film one-frame winding period are counted regardless of the presence or absence of data recording, and the counted value depends on the film feeding speed and the film winding diameter of the take-up spool 2. Regardless, since it becomes the constant value "10", the motor 3 is decelerated when the tenth ENC pulse is detected before the PF pulse is detected, and the motor 3 is instantaneously stopped by the detection of the PF pulse. It is also possible to use this ENC pulse for film feeding control.

Thereafter, the same processing is repeated each time the exposure completion signal is input, and the caption or binary code is recorded as a latent image on each photographed frame in accordance with the recording mode set by the user. It will be. According to the above-described processing, the film feed length is confirmed at the time of generation of the ENC pulse, the film feed speed is sequentially monitored by the ENC pulse pulse interval, and data recording data is recorded based on the film feed information. Therefore, the number of bits is much larger than the number of ENC pulses generated, regardless of the start-up characteristics at motor startup and the winding diameter of the film wound on the take-up spool 2. Binary code can be recorded with and clear captions can be recorded.

When the number of bits of the binary code to be recorded is small and there is a room to record further data during the film one frame feeding period, an arbitrary caption set by the user can be recorded in the room. You may do it.

The present invention has been described above with reference to the illustrated embodiment. However, the number of ENC pulses generated during the feeding period of one frame of the film, or the bits of data recorded within one pulse interval of the ENC pulses. The relationship between the number and the film type can be appropriately set as needed. In addition, EN corresponding to the film feed length
In order to obtain the C pulse, for example, a magnetic recording zone provided at the film edge may be arranged with a magnetized region and a non-magnetized region at a constant pitch, and the magnetic head may read this to generate an ENC pulse.

When a conventional film having eight perforations per frame is targeted, it is possible to photoelectrically detect passage of the perforations and use this as an ENC pulse. In addition, the number of LEDs arranged orthogonally to the film feeding direction is increased to record plural lines of binary code at the time of feeding the film, or to record binary code and caption or plural lines of caption simultaneously. It is also possible to do so.

Further, in the present embodiment, a changeover switch is provided in the camera body for inputting the type of film base so that the user can manually set it.
Bar codes, marks, etc. are provided on the film, or identification marks such as irregularities are provided on the film cartridge so that the camera automatically reads these marks, signs, etc. to recognize the type of film base. You may

[0056]

As described above, according to the data recording device for a camera of the present invention, the lighting time of the plurality of light emitters with respect to the moving amount of the film per unit time is set to the material of the base of the film. Since it is correspondingly different, it becomes possible to clearly record characters and data depending on the material of the film base.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing main components of a camera using the present invention.

FIG. 2 is a schematic diagram showing a configuration of a data recorder.

FIG. 3 is a schematic diagram showing how a data recorder records captions.

FIG. 4 is an explanatory diagram of a film on which data is recorded.

FIG. 5 is a timing chart showing how various pulses are generated during film feeding.

FIG. 6 is a timing chart showing the relationship between ENC pulses and data recording timing pulses.

FIG. 7 is a flowchart showing a basic process of film feeding.

FIG. 8 is a flowchart showing a process at the time of recording data.

FIG. 9 is a flowchart showing processing at the time of caption recording.

FIG. 10 is an explanatory diagram showing how the actual lighting of each LED changes depending on the type of film base.

FIG. 11 is a flowchart showing a process when a binary code is recorded.

FIG. 12 is an external perspective view of a camera using the present invention.

[Explanation of symbols]

 10 film type setting switch 11 photo sensor 14 driven roller 15 encoding plate 16 photo interrupter 18 buffer memory 20 data recorder 21 LED head 24 data ROM 24a font data storage 24b binary code data storage

Claims (2)

[Claims] 1. A plurality of light emitters are arrayed at right angles to the film feeding direction, and the plurality of light emitters are controlled to blink at the same time during one frame advance period of the film after photographing, so that the edge portions of the film are controlled. A predetermined binary code is recorded in the form of a bar code, and the font data of the mark representing the content of each binary code is read from the memory and the 2
In a camera data device for controlling the blinking of the plurality of light emitters during a period that does not overlap with the recording of the value code to record a mark indicating the content of the binary code on the edge portion of the film, The data recording device for a camera, wherein the lighting time of the plurality of light emitters with respect to the movement amount is made different according to the material of the base of the film. 2. When the base material of the film is polyethylene naphthalate (PEN), the lighting time of the plurality of luminous bodies with respect to the movement amount of the film per unit time, the base material of the film is polyethylene terephthalate The data recording device for a camera according to claim 1, wherein the length is made shorter than that of (PET) or triacetyl cellulose (TAC).