JP3308396B2 - Side printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side printing apparatus for printing an ID code, a frame number and the like as a latent image on the edge of a photographic film.

[0002]

2. Description of the Related Art A side print process is included in a process for manufacturing a photo film. Characters and bar codes representing standard information such as a manufacturer's name, ISO sensitivity and a frame number are printed as a latent image on the edge of the photo film. You. These prints appear when the photographic film is developed, and can be used by visual observation or read by an automatic reading device when performing the printing process.

[0003] To perform side printing, for example, an apparatus described in JP-A-58-219543 can be used. This side printing apparatus basically has the configuration shown in FIG.
The configuration is as shown in FIG. A print drum 3 is provided in a transport path of a photographic film 2 in a dark room, and a print head 4 is installed to face the print drum 3. The print head 4 is provided with a multi-element light emitting section 4a in which a plurality of light emitting diodes are arranged in a line so as to be orthogonal to the transport direction of the photographic film.

Each of the light-emitting diodes constituting the multi-element light-emitting section 4a is connected to the driver 5 by an individual signal line, and is lit by a drive current selectively supplied in accordance with the arrangement position. The lighting pattern is transferred to the edge portion of the photographic film 2 as a dot pattern for one column via the lens 4a constituting the reduction imaging system. Then, by selectively driving the light emitting diodes sequentially while the photographic film is being conveyed, predetermined character patterns and code patterns are projected as latent images on the edges of the photographic film. As the multi-element light-emitting portion 4a, one in which light-emitting diodes are arranged in only one row
A line configuration may be used, but recently, a high-density type in which a plurality of light emitting elements are arranged for improving the quality of a print pattern or for high-speed processing of side printing is used. Driving all at once is also performed.

The character and mark setting device 7 is used to select and set the type of characters, numerals, symbols, signs, etc. to be printed. The contents of the standard information to be printed can be automatically set. The main control unit 8 is of a personal computer type, and has a built-in dot pattern storage memory for pattern data for side printing the manufacturer name, ISO sensitivity, frame number, and ISO sensitivity and frame number. The barcode pattern data corresponding to the binary codes of the above is stored. Each time the photo film is fed for a predetermined length, dot pattern data is sequentially read from the dot pattern storage memory, and a side print is performed.

In order to print a predetermined print pattern at a predetermined position on each of the photo films 2,
The main controller 8 receives a synchronization pulse from a synchronization pulse generator 9 and an encode pulse generated from a rotary encoder 10 in synchronization with the transport of the photo film 2.
The synchronizing pulse is used as a start signal for one cycle of side printing, and is input from the photo film manufacturing apparatus to the main control unit 8 every time one photo film 2 is transported. Further, the encode pulse is used for monitoring the print position within one photo film 2. Note that reference numeral 1
Reference numeral 1 denotes an error indicator for notifying when an abnormality occurs during the side print process.

FIG. 3 shows an example of a print pattern printed by the above-described side printing apparatus. In addition to a character pattern of a manufacturer name 13, an ISO sensitivity 14, and a frame number 15, an ISO sensitivity and a frame are provided on an edge portion of the photo film 2. An ISO bar code 16 and a frame number bar code 17 representing numbers are printed one after another. In addition to the print data related to these standard information,
Printing of characters and marks for the production lot number, size, and the like is also performed as appropriate.

Each of these print data is standard information that does not require data change for each photo film 2 if the type and production lot of the photo film 2 flowing on the production line are determined. Therefore, if data for one photo film is prepared in advance in the storage device of the main control unit 8 for each type and lot of the photo film, the data is sequentially read from the storage device every time an encode pulse is input. The side print of one photo film can be sequentially performed while developing the read data into a dot pattern.

The above-described side printing is performed in the manufacturing process of the photographic film before cutting the photographic film one by one, and is performed from the rear end side to the front end side of the photographic film when cut. Will be Then, as shown in the time chart of FIG. 5, after one side print is performed on the photo film conveyed in a long state, the conveyance is temporarily stopped, and at this time, the photo film is cut one by one. I do. This temporary transport stop period S0 is about 0.2 seconds, and the transport period S1 for one photo film is 0.6 to 0.
If the time is set to about 8 seconds, the side print and the cutting of the photographic film are successively performed in the film cycle S of about 0.8 to 1.0 seconds.

[0010]

In addition to the side print of the standard information, side prints of ID information that can be used to identify each photo film are being studied. This ID information is composed of a plurality of types of data such as a production date and time, a production machine number, a processing head number for emulsion coating, a packaging material number, a serial number, and the like. For example, as shown in FIG. For example, it can be represented by an ID number represented by a nine-digit number, and can be represented by an ID code obtained by converting the ID number into a binary code as indicated by reference numeral 21 in FIG. These ID numbers and ID codes are side-printed so as to come to the rear end when the photo film is cut one by one. Note that 30 bits are required to express the 9-digit ID number 20 in a binary code. However, when the photo film 2 is a color negative film, the colors used for side-printing the ID information are black, cyan, and cyan. Magenta, dark blue, etc.
By appropriately changing it, it is also possible to express with a binary code of 15 bits or less.

If such ID information is side-printed, it can be developed even after it is marketed by performing development processing.
Since the D number 20 and the ID code 21 can be confirmed, the history of the photo film can be traced back to the manufacturing stage. Therefore, if a defect in a photo film is found at the user end, it is easy to trace it to the manufacturing stage, and it is possible to take early measures, such as identifying the cause of the defect, and control product quality. Above, very useful.

As described above, in order to process the side print at a high speed, the dot pattern data is sent from the main control unit 8 to the print head 4 at a high speed and an accurate timing in synchronization with the transport of the photographic film 2. There is a need. In this case, the side print of the standard information may be performed repeatedly for each photographic film, so that there is no need to input new print data to the main control unit 8 during the operation period T1. Is also relatively easy. However, when the ID information is side-printed, the content of the data to be side-printed is different for each photo film. In addition, the print data of the ID information may need to be changed in content in connection with the photo film manufacturing apparatus, so that the main control unit 8 cannot automatically update the ID information. For this reason, as shown in FIG. 6, the main controller 8 installed in a bright room outside the dark room D includes a host computer 15 and a programmable logic controller (hereinafter, “PLC”) 16.
Is connected, and new ID information is updated each time a side print of one photo film is performed.

The host computer 15 not only has the function of the character and mark setting device 7 shown in FIG. 2 but also has overall control of the manufacturing process of the photographic film. In response to a signal from the apparatus or the supply apparatus, it is determined what ID information should be given to the photographic film to be next printed. Then, when one cycle of side printing is completed and one cycle of the next side printing is started, the main control unit 8
Input the ID information represented by the digital signal. Also,
The PLC 16 controls the sequence of the photo film manufacturing apparatus. The side printing apparatus needs to operate while synchronizing with the photo film manufacturing apparatus.
Are used for exchanging synchronization signals and status signals between the two. Reference numerals 17 and 18 indicate a keyboard and a CRT. The keyboard 17 is operated when the program of the main control unit 8 is changed, and the CRT 18 is used when the program is changed, and is also used by the main control unit 8 to confirm whether the side print processing is properly executed.

FIG. 7 is a chart showing a time cycle of the entire side printing process. The setting cycle T is
This corresponds to a period in which a specific type of photographic film is continuously manufactured, and varies depending on the number of manufactured photographic films, but is a period of about several tens of minutes to several hours. In the setting cycle T, there are an operation stop period T0 and an operation period T1, and during the operation stop period T0, the type and the number of photographed films to be manufactured and the number of manufactured photo films are set by the host computer 15, and the operation period is set. During T1, photographic films of the same type and the same number of shots are repeatedly manufactured. During the manufacturing period, side printing is repeatedly performed in parallel, and in addition to standard information such as a manufacturer name, ISO sensitivity, and frame number,
The ID information is side-printed.

In the process of performing the side print, the ID information data is transmitted from the host computer 15 to the main control unit 8 during the temporary suspension period S0 of the photographic film, and the main control unit 8 newly transmits the data. The data of the transmitted ID information is updated as data to be next printed. After the ID data is updated in this manner, the transport of the photographic film is started, a side print is performed during the transport period S1, the ID number 20 and the ID code 21 are printed first, and then the frame number 15 and the ISO sensitivity 1
4. The standard information such as the bar codes 16 and 17 is printed one after another. The film cycle S required for the side print processing for one photo film is determined by the transport stop period S0 and the transport period S1.

As described above, during the transport stop period S0, I
To transmit and update the D information, and immediately develop the dot information into a dot pattern in synchronization with the transport of the photo film immediately after the start of the transport of the photo film, and print the data of the standard information. It is advantageous to use a dot pattern storage memory used for developing a dot pattern. When the data of the ID information is input from the host computer 15, the dot pattern storage memory is made directly accessible by the CPU of the main control unit 8 so that the ID information can be immediately developed into a dot pattern. Is advantageous.

By adopting the above configuration, it is possible to sequentially perform side printing not only for standard information but also for ID information. In particular, ID information is printed with a more accurate dot pattern than standard information. It is required to print. In response to such a request,
Various problems are likely to occur in the conventional device in which the main control unit 8 and the driver 5 installed on the bright room side and the print head 4 installed on the dark room side are connected by a large number of signal lines. This is because, for example, in a print head using about 50 light emitting diodes in a multi-element light emitting section, at least 100 signal lines are required in order to be able to individually drive each light emitting diode. In addition, if it is attempted to add a signal line for confirming whether the light emitting diode is properly lit or not, a total of 200 signal lines are required. The print head 4 is installed in a photographic film production line in a dark room, while the main control unit 8
In addition to being used together with the CRT 18 that emits light, it is also necessary to perform an external input operation from the keyboard 17 and thus is usually installed in a bright room, so that the length of the signal line reaches about 5 m. .

A large current of at most 10 A flows through these signal lines for driving the light-emitting diode, and this current flows in a spike shape with a pulse width of 1 μsec to 20 μsec to generate noise. If the signal line becomes long, the risk of adversely affecting peripheral devices due to its antenna effect becomes extremely high. In addition, when the signal lines are long, the line capacitance between the signal lines is increased, so that it is easy to cause induced light emission in which even light emitting diodes that do not need to emit light are turned on. For example, a 5 m signal line has a line capacitance of about 400 pF. However, if the current flowing through the signal line has a high frequency of about 1 MHz, the impedance between the lines drops to about 400 Ω, so that stimulated emission becomes easy to occur.

Such a problem is caused by incorporating a light emitting diode driving circuit in the print head 4 so that a large current does not need to flow through the signal line, and turning on / off the light emitting diode in the signal line.
It can be improved by passing a signal current at the logic circuit level for FF control. However, in this case, the ON / OFF control of the light emitting diode must be instantaneously switched through a long signal line.
A differential line driver / receiver such as a 422 type must be used, which causes an increase in cost. Moreover, since the number of signal lines is very large, the driver I
Cost burdens such as an increase in attached circuits such as C and connectors, and an increase in construction costs are increased.

The present invention has been made in view of the above technical background. Even when printing ID information having different information contents for each photographic film, it is possible to print the ID information without increasing the cost. Moreover, it is an object of the present invention to provide a side printing apparatus capable of performing an accurate printing process without causing any adverse effects such as generation of noise and induced light emission.

[0021]

SUMMARY OF THE INVENTION The present invention relates to a method for side-printing standard information and ID information on a photographic film manufactured in a dark room. Is installed in a dark room provided with a photographic film manufacturing line, and a main control unit for supplying a drive control signal to the print head is installed in a bright room. The print head is provided with a receiving shift register for storing emission data for one column in a dot pattern corresponding to the printing pattern, and a driving circuit for supplying a driving current for lighting to the plurality of light emitting elements. ing. In the main control unit,
A dot pattern storage memory for storing data obtained by converting a print pattern corresponding to input data from an external input device into a dot pattern, and the reception shift register for transmitting light emission data for one column of the dot pattern in accordance with a transfer clock pulse A control signal transmitting means is provided for supplying a print command pulse, which is obtained in synchronization with the transport of the photographic film, to the print head after the serial transfer. The command pulse and the command pulse are alternately supplied to the print head to perform the side print of one photographic film.

[0022]

The main control unit serially transfers the light emission data for one column of the dot pattern corresponding to the print pattern to be side-printed to the reception shift register of the print head. It suffices if there is one signal line through which the signal current passes. After the data transfer, the main controller inputs a light emission command pulse to the print head in synchronization with the transport of the photographic film. The drive circuit provided in the print head operates according to the light emission data for one column stored in the shift register, and a plurality of light emitting elements are selectively turned on to print one column print on the edge portion of the photographic film. Done. By alternately repeating the data transfer and the driving of the light emitting element in synchronization with the transport of the photographic film, the side print of one photographic film can be continued. The connection between the main control unit installed in the bright room and the print head in the dark room does not require many signal lines, and a large current does not flow through the signal lines, so equipment costs can be kept low. In addition, good side printing can be performed with almost no noise.

Furthermore, in selectively driving a plurality of light emitting elements in accordance with the light emission data stored in the shift register, the shift register and the multi-element light emitting unit are connected via a photocoupler. In this configuration, the range in which a large current flows can be limited to the vicinity of the multi-element light-emitting portion, and noise generation during driving of the light-emitting element can be almost eliminated. By forming a light emitting element for printing one dot with a pair of light emitting diodes having different colors, it is possible to print one dot in three kinds of colors, thereby increasing the amount of information. In addition, it is also possible to shunt the current flowing through the light emitting diode and photoelectrically detect the light emission, whereby the lighting of the light emitting diode can be surely confirmed.

[0024]

FIG. 1 schematically shows a circuit configuration of a side printing apparatus according to the present invention. In FIG.
26 has a keyboard 17 and a C via a bus line 27.
I / O port 28 for RT18, host computer 15
And an I / O port 30 for the PLC 16. The bus line 27 further includes a ROM 32 and a RAM 3
3, a hard disk drive 34, a timing control circuit 35, and a dot pattern storage memory 38 are connected. A column counter 3 is provided between the timing control circuit 35 and the print pattern storage memory 30.
9 are provided. Further, the main control unit 25 includes a serial-in / serial-out type shift register 40,
An interface circuit 41 is provided, which functions as a control signal transmission unit that sends control signals such as side print data and a light emission command pulse from the main control unit 25 to the print head 42 side.

The ROM 32 stores a main program relating to the side print process and a conversion table which is referred to when the print data is developed into a dot pattern. Data and flags used during the execution of the main program are appropriately written, updated, and read into the RAM 33. Hard disk drive 34
Is used as a storage device for storing types of characters and marks to be side-printed. When the type data of the photographic film to be subjected to the side print is input from the host computer 15, the CPU 26 reads from the hard disk device 34 the print data of the predetermined standard information corresponding to the type data.

The print data read from the hard disk device 34 is temporarily written into the RAM 33, then developed into dot pattern data by comparison with a conversion table in the ROM 32, and written into the dot pattern storage memory 38. At this time, the encoding pulse obtained from the rotary encoder 10 is referred to in synchronization with the transport of the photo film, and the development into the dot pattern is performed for each column. The shift register 40
It is used to store the emission data for one column thus obtained.

The timing control circuit 35 receives an encode pulse from the rotary encoder 10 obtained in synchronization with the transport of the photographic film. Each time the transport length of the photographic film reaches one column of the side print, the timing control circuit 35 stores a column in the column counter 39. Input the feed pulse. The column counter 39 counts the column feed pulse thus input. The transport length of one photographic film varies depending on the number of images that can be taken. For example, in the case of about 40 shots, a column feed pulse is generated every 30 μs in synchronization with the transport of the photographic film, and , Ten thousand thousands of column feed pulses are generated. The feed length of the photographic film per column feed pulse is about 0.1 mm.

The timing control circuit 35 is 4 MH
A transfer clock pulse of about z is generated and supplied to the shift register 41 and the interface circuit 41, and a light emission command pulse is output to the interface circuit 41. The output timing of the light emission command pulse is determined by the column counter 39.
Is controlled by the CPU 26 with reference to the count value and the print data of the hard disk device 34.

FIG. 8 shows the configuration of the interface circuit 41, which is connected to the interface circuit 43 of the print head 42 by three optical fibers 44a, 44b, and 44c. The optical fiber 44a is for data transfer, the optical fiber 44b is for clock pulse transfer,
4c are used independently for light emission command transfer.
Light emitting diodes (LEDs) 45a, 45b, 45c are provided at the light incident ends of the optical fibers 44a, 44b, 44c, respectively, and transistors 46a, 46b, 46c are provided respectively.
Lights when is turned on. An AND circuit 47 is connected to the base of the transistor 46a.
Is turned on when the transfer clock pulse is input when the light emission data for one dot transferred from “1” is “1”. The transistor 46b turns on when a transfer clock pulse is input. The transistor 46c is turned on when a light emission command pulse is input from the timing control circuit 35.

The interface circuit 43 on the print head side includes phototransistors 48a and 48 having the light receiving surfaces facing the light emitting surfaces of the optical fibers 44a, 44b and 44c.
b, 48c. Each of the phototransistors 48a, 48b, 48c is turned on when receiving light. When each of the phototransistors 48a and 48b is turned on and a collector current flows, light emission data and a transfer clock pulse are input to the shift register 50 for reception.
When the phototransistor 48c is turned on, a light emission command pulse is input to the driver 52.

As the shift register 50 on the receiving side, a serial-in / parallel-out type shift register is used, and the data pulse supplied from the interface circuit 43 to the input terminal is shifted to the next bit position every time a transfer clock pulse is input. . Signal lines from each bit position of the shift register 50 are connected in parallel to the driver 52. The signal line from the driver 52 is connected to the current amplifier 53,
Further, the multi-element light-emitting portion 5
5 is connected. The current amplifying amplifier 53 amplifies the drive signal output from the driver 52 in accordance with the emission data for one column, and selectively emits light to a plurality of light emitting elements constituting the multi-element light emitting section 55. Supply drive current. Therefore, a large current flows only in the output line of the current amplification amplifier 53, and only a weak current of a logic circuit level flows in other signal lines.

FIG. 9 schematically shows the structure of the multi-element light emitting section 55. The multi-element light-emitting portion 55 includes seven light-emitting elements 56a to 56a.
6g, which are used together with seven optical fibers 57a to 57g provided corresponding to them and a lens 58 for reduced image formation. Each of the light emitting elements 56a to 56g incorporates a green light emitting diode (G-LED) 59a and a red light emitting diode (R-LED) 59b, and can light each of the light emitting elements individually or simultaneously. The optical fibers 57a to 57g have circular light incident end faces,
The light emitting end face is rectangular, and tightly bound on the light emitting end face side so as to be linear in a direction perpendicular to the transport direction of the photographic film. As a result, light from each of the light emitting elements 56a to 56g is efficiently incident, and a light emitting pattern having a straight edge on the emission side is obtained.

The multi-element light-emitting section 55 constitutes a 7-dot linear light-emitting section driven simultaneously by one column of light-emitting data, and the GL of all the light-emitting elements 56a to 56g.
When the ED 59a and the R-LED 59b are turned on, sufficient color mixing is performed while passing through the optical fiber, and an intermediate color (yellow) linear light emission pattern is obtained on the emission end face side. When the light emitting elements 56a to 56b are selectively driven, a dot array light emitting pattern for one column is obtained. In this embodiment, in order to prevent the description from becoming complicated, the multi-element light-emitting section 55 in which the light-emitting elements 56a to 56g are arranged in only one line is used. However, the light-emitting elements 56a to 56b can be arranged in a plurality of lines. In addition, these can be simultaneously driven to print a dot pattern of one line, or a plurality of rows of dot patterns can be printed. In this case, the entire dot pattern for a plurality of rows is 1
It becomes a dot pattern for columns. Also, by changing the emission data, the G-LED 59a and the R-LED 5
Since only one of 9b can be turned on, a print in green or a print in red can be performed, and the side print can be appropriately performed in three types of colors.

FIG. 10 shows a gate array used for the shift register 50 and the driver 52. The multi-element light-emitting section 55 is composed of seven light-emitting elements 56a to 56g,
G-LED 59a and R-LED 59b for each light emitting element
And the shift register 50
Is composed of a first register 50a and a second register 50b each having a storage area of 7 bits. First
A signal line from each bit position of the register 50a is connected to each of the NAND circuits 60a to 60
0g is connected to one input terminal. Similarly, signal lines from each bit position of the second register 50b are connected to the individual NAND circuits 61a to 61
g is connected to one input terminal.

Each of the NAND circuits 60a to 60g, 61a
To the other input terminal of the interface circuit 4
The light emission command pulse from No. 3 is input. As shown,
The first register 50a and the second register 50b store the emission data “1010111” and “100111” for one column.
Assuming that “1” is stored, the output terminals of the NAND circuits 60 a to 60 g in the G gate array 60 sequentially output “0101” from the top during the period in which the light emission command pulse is input.
000 "is output, and drive signals inverted to" 0110000 "are output to the output terminals of the NAND circuits 61a to 61g of the R gate array 61 in order from the top. The drive signals "0", "1"
Means that the output terminal of each NAND circuit is "low level",
It indicates that it becomes "high level".

NAND circuits 60a-60g, 61a-61
The output terminals of g are connected to switching transistors 62a, 62b,..., 63 as shown in FIG.
, 63b,... are connected. Light-emitting diodes (LEDs) 64a, 64b,...
5a, 65b,... Are connected in series. These LEDs 64 and 65 include NAND circuits 60 a to 60 g constituting the G gate array 60 and an R gate array 61.
According to the arrangement order of the NAND circuits 61a to 61g constituting
LED64a and LED65a, LED64b and LED6
As shown in FIG. 5b, they are combined in pairs from the top.

FIG. 13 shows a part of the current amplification amplifier 53, which drives the light emitting element 56a for one dot. Therefore, the same circuit is used for the other light emitting elements 56b to 56g. A phototransistor facing the LEDs 64a and 65a is incorporated in the current amplifier 53, and the photocouplers 66G and
6R. G-LED constituting light emitting element 56a
One of the 59a and the R-LED 59b is connected to the common line drawn from the connection point of the drive power supplies 68 and 69, and one is connected to the cathode and the other is connected to the anode. And LE
When the driving transistor 70 is turned on by the lighting signal of D64a, a driving current for lighting flows from the driving power supply 68, and the G-LED 59a is turned on. When the operational amplifier 71 is driven by the lighting signal of the LED 65a, the R-LED 59b is turned on by the driving current from the driving power source 69.

The configuration described so far is for performing side printing on one edge portion of the photographic film. However, as shown in FIG. 4, the other edge portion of the photographic film also has a side print. In order to perform printing, a multi-element light-emitting portion having a similar configuration is made to face the other edge portion of the photographic film. It may be driven at an appropriate timing.

The operation of the side printing apparatus according to the present invention will be described below. Also in this side printing apparatus, side printing is executed according to the time chart shown in FIG.
The data such as the type, the number of shots, and the number of manufactured photographic films to be manufactured are set by the host computer 15 during the operation suspension period T0. Then, the production and side printing of the photo film are repeatedly performed one after another during the operation period T1, and the photo film on which the ID information is side-printed in addition to the standard information such as the manufacturer name, the ISO sensitivity and the frame number is manufactured. .

When the type of the photographic film and the number of photographed images are set by the host computer 15 during the operation suspension period T0,
These setting data are read by the main control unit 25. The CPU 26 accesses the hard disk device 34, reads all the print data as the standard information of the photo film, and stores it in the RAM 33. Further, the host computer 15 determines the setting state of various devices such as an emulsion coating device and a slitter device provided on the photographic film manufacturing line, and furthermore, the photographic film manufactured first based on the manufacturing date, time and the like. ID number and ID for book
A code is set, and these ID data are input to the main control unit 25.

The film cycle S included in the operation period T1 is about 1 second, and the number of repetitions is equal to the number of photographic films of the same type and the same number of shots set by the host computer 15. Then, during each transport stop period S0, the main controller 25 controls the host computer 1
5, the new ID data is received and written in the designated address area of the RAM 33 to update the ID data. Also,
During this receiving period, one side-printed photo film is cut from the long photo film. As for the standard information, since the data initially set during the operation suspension period T0 is used repeatedly as it is, there is no need to receive data input from the outside for each photo film.

As described above, during the transport stop period S0, R
The AM 33 is provided with standard information data and ID information data necessary for the next side print. Then, the photographic film is conveyed starting from the rear end side, as shown in FIG.
As shown in FIG. 7, first, a side print of the ID number 20 and the ID code 21 is performed. When the transport of the photo film is started, an encode pulse synchronized with the transport of the photo film is input from the rotary encoder 10 to the timing control circuit 35.

As described above, the side print is executed by the multi-element light emitting unit 55 shown in FIG. 9 in units of one column of 14 bits / 7 dots. Therefore, as shown in FIG. 11, each column cycle depends on the data transfer period for serially transferring the light emission data to the reception shift register 50 on the print head side and the light emission data sent to the shift register 50. And a light emitting period for driving the element light emitting section 55. The column cycle is about 30 μsec, and the light emission period is about 1 μsec to 6 μsec.

The light emission data transfer process is performed as follows. The main control unit 25 first reads out print data for performing side print from the RAM 33. Next, CPU
26 accesses the ROM 32 to convert the print data into dot pattern data, and stores the converted dot pattern data in the dot pattern storage memory 38. Next, the CPU 26 stores a dot pattern storage memory 38.
Of the dot pattern corresponding to the print data stored in the shift register 40 on the transmission side as light emission data. The light emission data stored in the shift register 40 in this manner is sent one bit at a time to the input terminal of the AND circuit 47 shown in FIG.

Since the transfer clock pulse is also sent to the other input terminal of the AND circuit 47 and the base terminal of the transistor 46b, the light emitting LED 45a is turned on when the light emitting data is "1", and When the light emission data is "0", the LED 45a remains off. The on / off information of these LEDs 45a, 45b is transmitted to the print head side through the optical fibers 44a, 44b and stored in the shift register 40 on the transmission side.
The emission data for the columns is stored in the shift register 50 on the receiving side via the interface circuit 43.

After the transfer of the emission data for one column is completed, when the count value of the column counter 39 reaches a predetermined value, the timing control circuit 35 outputs an emission command pulse for the first column. The LED 46c of the interface circuit 41 is turned on by the output of the light emission command pulse, and the lighting signal is input to the driver 52 via the optical fiber 44c and the interface circuit 43. Since the light emission data of "1" and "0" at each bit position of the shift register 50 are sent to one input terminal of the NAND circuit as shown in FIG. 10, the other input terminals of these NAND circuits are transmitted. When the light emission command pulse "1" is sent to the NAND circuit at the same time, the output terminal of the NAND circuit to which the light emission data "1" is input is at a low level, and the output terminal of the NAND circuit to which the light emission data "0" is input. Indicates a high level drive signal.

The transistors 63a, 62b,..., And the transistor 63 connected to the output terminals of the respective NAND circuits
, are turned on when a low level signal is received, and remain off when a high level signal is received, and the LEDs 64a, 64b,.
The combination of lighting and extinguishing of the LEDs 65a, 65b, ... is determined. As a result, the LEDs 64a, 64b,.
.. Of the first register 50a corresponding to the bit position of the light emission data “1” is turned on, and the LEDs 65a, 65
5b,... Of the second register 50b corresponding to the bit position of the light emission data "1" are turned on.

Thus, the LEDs 64a, 64b,.
When the LEDs 65a, 65b,... Are turned on in accordance with the light emission data of the shift register 50, these lighting signals are input to the current amplification amplifier 53 via the photocouplers 66G and 66R, respectively, and are supplied from the drive power supplies 68 and 69. By the power supply, the light emitting elements 56a to 56g are turned on and off according to the light emission data, and the side print for one column is performed. The printing time at this time is determined by the lighting time of the light emitting elements 56a to 56g, and the lighting time is determined by the pulse width of the light emitting command pulse. Therefore, the pulse width of the light emitting command pulse is automatically adjusted according to the ISO sensitivity of the photographic film. It is good to keep it.

A print pattern recorded as a latent image on a photographic film by one column side print is as follows.
This corresponds to the arrangement distribution of the light emission data "1" at each bit position of the first register 50a and the second register 50b. When all the light emission data for 14 bits is "1", G-G is applied to all the light emitting elements 56a to 56g.
Since the LED 59a and the R-LED 59b are turned on, the green light and the red light are mixed for each dot position while passing through the optical fibers 57a to 57g, and exposure is performed with a yellow print light in a linear print pattern. Such a line pattern is frequently used when printing the ID code 21. If the photographic film is a color negative film, a blue linear pattern appears after the film development. In the case of the light emission data illustrated in FIG. 10, the light emitting elements 56a, 56c, 56e,
56f and 56g emit yellow light, and exposure is performed using the dot pattern. Such dot pattern exposure is used for exposing one column of characters and marks.

The completion of the printing process for one column can be detected by the main controller 25 based on the completion of the output of the light emission command pulse. After the output of the light emission command pulse is completed, the main control unit 25 reads the dot pattern data of the second column from the dot pattern storage memory 38 and stores it in the shift register 40 as light emission data. During this time, the timing control circuit 35 transfers the photo film.
Receives an encode pulse. Then, while the print position of the second column of the photographic film is conveyed to a position directly facing the multi-element light emitting section 55, the shift register 40
Are transmitted to the shift register 50 in the same manner as the light emission data of the first column.

When the number of encode pulses input to the timing control circuit 35 reaches a predetermined number and a column feed pulse is output, the timing control circuit 35 outputs a light emission command pulse for the second column. This light emission command pulse is similarly output to the driver 52, and the second column side print is performed. Thereafter, printing is performed for each column by repeating the same operation. I
After printing the D number 20 and ID code 21, RA
The print data of the standard information is read from M33, and the side print is performed in exactly the same processing.

Although portions of the photo film where no side printing is performed are scattered, an encode pulse is input to the timing control circuit 35 while these portions pass through the multi-element light emitting section 55. Is done. Then, since the timing control circuit 35 outputs a column feed pulse each time it receives a certain number of encode pulses, the count value of the column counter 39 increases. However, for the portion where the side print is unnecessary, the column count value corresponding to the portion where the side print is unnecessary is automatically stored in the RAM 3 from the host computer 15 when the type of the photo film and the number of shots are set.
3 is written.

Then, the CPU 26 refers to the count value of the column counter 39 at the time when the light emission command pulse is output, and counts the count value by “1” and writes the count value in the RAM 33 to the count value which is unnecessary for side printing. Is determined. When it is determined that the side print is unnecessary, the light emission data of all “0” is stored in the shift register 40, and the light emission is performed even if a column feed pulse is output from the timing control circuit 35 next time. Timing control circuit 3 so that no command pulse is generated
5 is controlled. Therefore, while the portion that does not require side printing is conveyed, the count value of the column counter 39 simply increases, and the multi-element light emitting unit 55 is not driven.

As described above, the side printing of the ID information and the standard information of one photo film is completed in synchronization with the conveyance of the photo film, and when one film cycle elapses, the conveyance stop period S0 is started. During this time, the cutting process of the long photo film is performed, and one photo film whose side print is completed is completed. During this transport stop period S0,
The host computer 15 transmits the ID data of the photo film to be printed next to the main control unit 25,
The ID data in 33 is updated to a new one. Thereafter, the next film cycle is started in the same manner, and the side print is restarted.

According to the above-mentioned side printing apparatus, the three optical fibers 44a, 43a are connected between the main control unit 25 placed in the bright room and the print head 42 placed in the dark room via the interface circuits 41 and 43. Since the connection can be made by 44b and 44c, noise generation and the problem of induced light emission, which are problems in the conventional device, are eliminated, and stable side printing can be performed. Further, when the light emission data is transferred from the main control unit 25 to the print head 42, serial transmission is performed using a transfer clock pulse, so that the number of signal lines can be significantly reduced. Therefore, the number of optical fibers can be reduced, which is advantageous not only in cost but also in the use of electric signal lines instead of optical fibers.

Further, in the above embodiment, the light emission data of the G-LED 59a and the light emission data of the R-LED 59b are serially transmitted in series, but the light emission data of each color is transmitted using an individual channel. It may be.
In this case, one more signal line may be added between the main control unit 25 and the print head 42, and a transfer circuit for one channel may be added to the interface circuits 41 and 43 in response to this. Therefore, the configuration is hardly complicated. Then, the transmission period of the light emission data can be reduced to almost half. In the print head 42, a current amplification amplifier 53 is provided after the driver 52, and the G-LED 59a and the R-LED 59 are provided.
Since only the current flowing through the multi-element light-emitting section 55 is turned on at the same time, even if a current of about 10 A flows in a pulse shape in the entire multi-element light-emitting section 55, the main control section is turned on. There is no adverse effect of noise on 25 or surrounding devices.

FIG. 14 shows an embodiment in which the above-described side printing apparatus is provided with a function for confirming the drive of the light emitting elements. The components which are used in common with the above embodiment are denoted by the same reference numerals. As shown, the G-LED 59
a, LED 75b is included in the lighting circuit of R-LED 59b.
G and a shunt circuit including the LED 75R are connected in parallel, and the phototransistors 76G and 7 are arranged to face each other.
Photocouplers 77G and 77R in combination with 6R
Is composed. The configuration shown in FIG.
6a for one light emitting element 56b
Exactly the same configuration is added to ~ 56g.

As described above, when the drive signal is supplied to the current amplifier 53 via the photocouplers 66G and 66R incorporated in the driver 52, the drive power supply 68 and
G-LED 59a, R-LED5 by power supply from 69
9b lights up. Part of this lighting current is LED
75G, flows to the LED 75R, and the photocouplers 77G, 7
A high level signal is output to 7R. Also,
G-LED 59a, R-LED5 corresponding to the emission data
When one or both of 9b are not lit,
Photocouplers 77G and 77 provided correspondingly, respectively.
The output terminal of R remains at the low level. Therefore, by monitoring the signal levels appearing at the output terminals of the photocouplers 77G, 77R, the G-LEDs 59a, R-LE
The driving results of turning on and off D59b can be confirmed.

These drive confirmation signals are transmitted to the light emitting element 56a.
G-LED 59a, R-LED 59b of ~ 56g
And input to the bit comparison circuit 80 shown in FIG. The bit comparison circuit 80 is made up of the same number of comparison elements as the total number of bits of the first register 50a and the second register 50b constituting the shift register 50, and the arrangement thereof is such that each bit of the first and second registers 50a and 50b is It corresponds to the position. Each comparison element is constituted by an exclusive OR circuit 81 having two input terminals as shown in FIG. One of the input terminals receives the above-described drive confirmation signal, and the other input terminal receives the first and second registers 50a and 50a.
"1" stored in each bit position of 0b,
Light emission data of “0” is input.

Each of the exclusive OR elements 81 receives the drive confirmation signal "1" (high-level signal) together with the light emission data "1" and the drive confirmation signal "0" (with the light emission data "0"). It outputs "0" when a low level signal is input, and outputs "1" otherwise. Therefore, the output of the exclusive OR element 81 is “0”.
G-LED 59a, R-LED5
It can be easily determined that turning on and off of 9b is normal.

The discrimination signal obtained for each bit position is latched for each bit position in the drive confirmation data storage register 82 composed of a parallel-in / serial-out type shift register for each bit position. A latch signal for this purpose is generated by a light emission command pulse, and the G-LED 59a, R-LE
The lighting timing of D59b is slightly shifted. To correct this, a timing adjustment circuit 83 is used. The timing adjusting circuit 83 has monostable multivibrators 83a and 83b connected in series. As shown in FIG. 17, the monostable multivibrator 83a outputs a pulse having a pulse width t1 in response to the rise of the emission command pulse. Then, the monostable multivibrator 83b receives a falling edge of the pulse and outputs a pulse having a pulse width t2. Then, the falling signal of the pulse from the monostable multivibrator 83b becomes a latch signal for taking the discrimination signal of each bit position into the drive confirmation data storage register 82. The times t1 and t2 are set so that the time “t1 + t2” falls within the output period of the drive confirmation signal.

The drive confirmation data latched in the drive confirmation data storage register 82 is serially inputted to the interface circuit 85 by input of a transfer clock pulse. The interface circuit 85 adds a transmission channel for driving confirmation data to the interface circuit 43 used in the above-described embodiment, and converts the driving confirmation data output as an electric signal into a blinking light signal using a photocoupler. It is like that. The transmission channel of the drive confirmation data is sent to the interface circuit on the side of the main control unit 25 via an optical fiber, and is again converted into an electric signal and input to the main control unit 25. The main control unit 25 checks which bit position in the drive confirmation signal serially input for 14 bits has the malfunction data “1”.

A description will be given of the operation of confirming the driving of the light emitting element having the above-described configuration. Prior to the start of the side print, emission data for one column is set in the shift register 40 and stored in the shift register 50 on the print head side. A light emission command pulse is input to the print head 42 at the timing when the photographic film is transported to the predetermined position, and the G-LEDs 59 of the light emitting elements 56a to 56g are input.
a, the one corresponding to the light emission data “1” among the R-LEDs 59b is turned on.

The lighting and non-lighting of the G-LED 59a and the R-LED 59b are determined by the photocouplers 77G and 7 shown in FIG.
The drive confirmation signals of “1” and “0” are provided by 7R, and these are input to the bit comparison circuit 80. The light emission data stored in the shift register 50 is input to the bit comparison circuit 80 for each bit position, and when the drive confirmation signal is input, the exclusive OR is obtained for each bit position, The result is updated as drive confirmation data. After a lapse of “t1 + t2” time from the generation of the light emission command pulse in the first column, the timing adjustment circuit 83
, And the drive confirmation data of the bit comparison circuit 80 is simultaneously latched by the drive confirmation data storage register 82.

Following the side print of the first column, 2
Similarly, the light emission data of the column
The transfer clock pulse is also supplied to the drive confirmation data storage register 82. As a result, the drive confirmation data latched in the drive confirmation data storage register 82 is fed back to the main controller 25 via the interface circuit 85 one bit at a time.
The main control unit 25 identifies whether there is malfunction data of “1” in the drive confirmation data, and if not, continues the side print and drive confirmation in the same procedure. When the malfunction data "1" is detected, an error is displayed on the CRT 18 together with the bit position.

According to the above, the G-LED 59 due to disconnection
a, Erroneous lighting due to defective lighting of the R-LED 59b, noise or the like can be performed in parallel with printing for one column. Also, since the bit lengths of the light emission data and the drive confirmation data match, the main control unit 25 on the light room side
, The drive confirmation data can be taken into the main control unit 25 from the print head 42 by using the same transfer clock pulse at the same time as the light emission data is transferred to the print head 42 in the dark room side. It is possible to easily confirm whether or not the side print has been properly performed.

In the embodiments described above, the optical fibers 44a to 44c for transmitting the light emission data, the light emission command pulse, and the transfer clock pulse from the main control unit 25 to the print head 42.
If any one of them is broken or the proper light emission data sent from the main control unit 25 can be converted to different light emission data for some reason, the main control unit 25 detects the abnormality. Can not do it. Therefore, there is a concern that a large amount of side print defects may occur on the bright room side without noticing the abnormal operation on the dark room side. FIG.
The embodiment shown in (1) has a function of preventing such inconvenience.

Referring to FIG. 18, first and second registers 50 are provided.
The light emission data stored in a and 50b are input to the coincidence detection circuit 88 while maintaining their bit position arrays. As shown in FIG. 19, the coincidence detecting circuit 88 includes fourteen exclusive OR circuits 89 provided corresponding to the respective bit positions of the first and second registers 50a and 50b, A negative input type AND circuit 90 to which an output from the circuit 89 is supplied. Also, bit pattern data from the specific bit pattern data generator 91 is input to the other input terminal of each exclusive OR circuit 89.

The specific bit pattern data generator 91
As shown in FIG. 20, first and second registers 50a, 50
digit switches 9 as many as the total number of bits of b
It comprises a switch array 92 in which 2a are arranged. A low level signal appears when the digit switch 92a is turned on, and a high level signal appears when the digit switch 92a is turned off, at output terminals connected in parallel to these digit switches 92a. Therefore, by appropriately turning on / off these digit switches 92a in accordance with the arrangement position, bit pattern data composed of a combination of a high-level signal and a low-level signal at the output terminal can be obtained.

The output from the coincidence detection circuit 88 (the output of the AND circuit 90) is input to one input terminal of the AND circuit 93, and monostable multivibrators 94a and 94b are connected in series to the other input terminal of the AND circuit 93. The output terminal of the connected timing adjustment circuit 94 is connected. The interface circuit 95 is obtained by adding a transmission channel for driving confirmation data to the interface circuit 43, similarly to the interface circuit 85 described above. The output of the AND circuit 93 is similarly output to the interface circuit 9.
5 and the optical fiber and the interface circuit on the side of the main control unit 25, and sent to the main control unit 25.

The operation of the above configuration is as follows.
First, the on / off operation of the digit switch 92a is set so that a specific bit pattern that is not used during normal side printing is output from the specific bit pattern data generator 91. When the type of the photo film and the number of shots are set by the host computer 15, the same dot pattern as the specific bit pattern is set at the column position corresponding to the leading end of the photo film (non-print area of standard information and ID information). Is set in the RAM 33 so as to print the end code having the following.

In the process of performing normal side printing together with the transport of the photographic film, the light emission data of each time is compared with the specific bit pattern from the specific bit pattern data generator 91. Is different from the light emission data used in the side print, so that the output of the coincidence detection circuit 88 does not become "1". At the time when the side print proceeds and the leading end portion of the photographic film is sent immediately below the multi-element light emitting section 55, the shift register 50 on the receiving side is in a state where the emission data of the end code is stored. The light emission data is supplied to the coincidence detection circuit 88, and is compared with a specific bit pattern preset in the specific bit pattern data generator 91 for each bit position. A high-level signal appears at the output of the match detection circuit 88 only when these match completely.

When the emission command pulse is output, the monostable multivibrator 94a outputs a pulse having a pulse width t3 with the rising edge as a trigger, as shown in FIG. The monostable multivibrator 94b outputs a pulse having a pulse width t4, triggered by the falling edge of the pulse output from the preceding monostable multivibrator 94a. As a result, after the emission command pulse is output, t
After 3 elapses, a high-level signal having a pulse width t4 is input to the AND circuit 93. At this time, if a high-level signal appears at the output of the match detection circuit 88, the AND circuit 93 outputs a high-level match confirmation signal, which is input to the main control unit 25.

This match confirmation signal is read by the main control unit 25 as an end code signal, and the count value of the column counter 39 at the time when the end code is obtained is referred to. If this column count value is a value corresponding to the leading end of the photo film, it may be determined that the side printing has proceeded normally and has been reliably performed to the end. According to this, it is possible to confirm whether or not the print head 42 in the dark room is performing an appropriate side print by the main control unit 25 in the light room, and it is possible to solve the problem of generating a large amount of side print defects. can do.

Although the present invention has been described with reference to the illustrated embodiment, the number of light emitting elements for one column constituting the multi-element light emitting section 55 can be appropriately increased or decreased. In addition to increasing the number of arrays in the direction perpendicular to the transport direction, it is also possible to arrange a plurality of rows of light-emitting elements perpendicular to the transport direction of the photographic film and control the lighting of these at once. In this case, it is possible to print a dot pattern for one line by using a plurality of rows of light emitting elements, and it is also possible to print a dot pattern for a plurality of lines. Therefore, the light emission data for a plurality of columns becomes light emission data for one column. In addition, the present invention is particularly suitable for a device in which ID information can be side-printed in addition to standard information, but is equally applicable to a device for performing only side printing of standard information.

[0076]

As described above, according to the present invention, the print head is provided with the receiving shift register for storing the emission data for one column, and the main control unit emits the emission data corresponding to the dot pattern, the transfer clock, and the like. After serially transferring the control signal required for side printing to the shift register, the main control unit inputs a light emission command pulse to the print head, and drives the multi-element light emitting unit based on the light emission data stored in the reception shift register. Side prints, the number of signal lines between the main control unit and the print head can be greatly reduced, which not only simplifies the configuration but also generates noise and stimulated emission. It is possible to solve the problem of easy operation. Furthermore, if the signal line between the main control unit and the print head is composed of optical fibers, and the light emission data, transfer clock pulse, and light emission command pulse are sent by a flashing light signal, no electrical noise will be generated. Signals can be transmitted and received between the main control unit and the print head without performing this operation.

Further, a photocoupler is provided between the receiving shift register storing the light emission data and the light emitting element, so that there is no need to directly connect the two by an electrical connection. Only a large current flows in the vicinity thereof, so that expensive circuit elements are not required between the main control unit and the print head. Furthermore, by using individual light emitting elements in combination with a pair of light emitting diodes having different emission colors or more, and by appropriately combining these lightings, it becomes possible to include information by color in the side print pattern, This is advantageous in increasing the density of information. In addition, it is possible to divide the drive current supplied when the light emitting element is turned on to another light emitting body and turn on the light emitting element, photoelectrically detect this light emission, and confirm the drive of the light emitting element for side printing. Further, the light emission data stored in the reception shift register and the drive confirmation signal of the light emitting element are input to the comparison circuit for each bit position,
By determining these coincidences, it is also possible to easily check whether or not the side-printed dot pattern is appropriate for the light emission data.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a side printing apparatus using the present invention.

FIG. 2 is a schematic view of a conventional device.

FIG. 3 is an explanatory diagram of a photo film on which a side print of standard information has been performed.

FIG. 4 is an explanatory diagram of a photographic film on which side printing of standard information and ID information has been performed.

FIG. 5 is a time chart when a side print of standard information is performed.

FIG. 6 is a block diagram illustrating an example of a configuration in a case where a print function of ID information is added to a conventional device.

FIG. 7 is a time chart when performing side printing of standard information and ID information.

FIG. 8 is a circuit diagram showing a configuration of an interface circuit used in the present invention.

FIG. 9 is a schematic diagram illustrating a configuration of a print head.

FIG. 10 is a circuit diagram showing a configuration of a shift register on the receiving side.

FIG. 11 is a time chart illustrating a light emission data transfer process.

FIG. 12 is a circuit diagram showing a configuration of a driver built in a print head.

FIG. 13 is a circuit diagram showing a partial configuration of a current amplification amplifier for driving a light emitting element.

FIG. 14 is a circuit configuration diagram for confirming driving of a light emitting element.

FIG. 15 is a circuit configuration diagram for confirming driving of one column of a light emitting element.

FIG. 16 is a circuit diagram showing a unit configuration of a bit comparison circuit used in the circuit of FIG. 15;

FIG. 17 is a time chart showing a timing of latching a drive confirmation signal from a bit comparison circuit.

FIG. 18 is a circuit configuration diagram for detecting whether or not the contents of all bits of the emission data match a predetermined bit pattern.

FIG. 19 is a circuit diagram showing a configuration of a coincidence detection circuit used in the circuit of FIG. 18;

20 is a circuit diagram showing a configuration of a specific bit pattern generator used in the circuit of FIG.

FIG. 21 is a time chart showing the timing of taking in a match confirmation signal from a match detection circuit.

[Explanation of symbols]

 2 Photo Film 10 Rotary Encoder 25 Main Control Unit 35 Timing Control Circuit 38 Dot Pattern Storage Memory 39 Column Counter 40 Shift Register 41 Interface Circuit 42 Printhead 43 Interface Circuit 44a, 44b, 44c Optical Fiber 50 Shift Register 55 Multi-Element Light Emitting Unit 56a , 56b, ... Light emitting elements 57a, 57b, ... Optical fiber 59a G-LED 59b R-LED 60 G Gate array 61 R Gate array 66G, 66R Photocoupler 70 Driving transistor 71 Operational amplifier 77G, 77R Photocoupler 80 bit comparison circuit 83 timing adjustment circuit 88 coincidence detection circuit 92 switch array 91 specific bit pattern generator 94 timing adjustment circuit

Claims (6)

(57) [Claims] 1. A print head which is installed in a dark room and includes a multi-element light-emitting section in which a plurality of light-emitting elements are arranged in at least one line so as to be substantially perpendicular to the direction in which a photographic film is transported; A main control unit that converts a print pattern corresponding to input data from the device into a dot pattern, and supplies a control signal to the print head for selectively lighting the plurality of light emitting elements in accordance with the dot pattern; And a drive unit for driving the print head in synchronization with the transport of the photographic film, thereby printing the dot pattern on the edge of the photographic film every column corresponding to the arrangement direction of the light emitting elements. A reception shift register for storing one column of light emission data in the print head; and a reception shift register. A drive circuit for selectively supplying a drive current to the plurality of light emitting elements in accordance with the light emission data at each bit position; and storing data obtained by converting the print pattern into a dot pattern in the main control unit. The dot pattern storage memory and the converted emission data for one column of the dot pattern are serially transferred to the receiving shift register according to a transfer clock pulse, and after this serial transfer, the data is obtained in synchronization with the transport of the photographic film. A control signal transmitting means for inputting a light emission command pulse to the print head is provided, and the transmission of light emission data for one column to the receiving shift register and the input of the light emission command pulse are alternately repeated. A side printing device for performing printing. 2. The method according to claim 1, wherein the main control unit and the print head are connected by an optical fiber, and the light emitting data and the transfer clock pulse sent from the main control unit to the receiving register are converted into a blinking light signal and serially transferred. The side printing apparatus according to claim 1, wherein: 3. A photocoupler is constituted by a light emitting body for signal transmission provided for each bit position of the shift register for reception and a light receiving body facing each of these light emitting bodies. The light emitting device according to claim 1, wherein the light is turned on in accordance with the content of the light emission data at each bit position of the shift register, and the light emission is detected by a photoreceptor and a drive current is supplied to a light emitting element corresponding to each bit position. 3. The side printing apparatus according to 1 or 2. 4. Each of the plurality of light emitting elements is composed of at least two light emitting diodes having different emission colors, and each of the light emitting diodes is individually driven in accordance with light emission data to thereby provide one light emitting element per light emitting element. 4. The side printing apparatus according to claim 1, wherein a plurality of types of colors are obtained. 5. The light emitting device according to claim 1, wherein a driving current flowing through the light emitting element is divided into a light emitting body for lighting detection, and the light emitting element is turned on. 4. The side printing apparatus according to any one of 4. 6. A comparison for comparing the contents of one column of light emission data stored in the shift register with a lighting pattern obtained by combining a drive confirmation signal of each of the light emitting elements in correspondence with a bit position of the shift register. Circuit,
6. The side printing apparatus according to claim 5, wherein the matching is detected to confirm execution of an appropriate side print.