JPH045556B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information output device, and particularly to an information output device using a printer.

Conventionally, various devices have been developed and proposed that output page information using, for example, electrostatic recording devices using laser beams, optical fibers, etc., inkjet recording devices, CRT display devices, and the like.

This type of information output device, for example, stores text information that is continuously input line by line from a storage device such as a magnetic tape (MT) or a disk when recording a text, By extracting information line by line, character codes are output continuously for each line in the raster scanning direction of a laser beam, etc., and the necessary character signals are generated accordingly to record the characters on recording paper. It is something to do.

When the storage unit of a conventional information processing device finishes recording one page and records text information for the next page,
A device with a storage section for only one page has the disadvantage that it is not possible to record the next page immediately after the recording of the previous page is completed, making it impossible to perform continuous high-speed recording. Furthermore, if a jam (paper jam) occurs during continuous recording, text information may be lost. If such a situation occurs, even if you remove the cause of the jam and restart recording, it may not be possible to record in order.

Furthermore, Japanese Patent Application Laid-Open No. 54-94846 has proposed a conventional printer having two page storage devices for reprinting in the event of a failure. However, in this method, the input/output control device of the printer reports the occurrence of a failure to the main control unit (host), and the host controls which pages are reprinted. The drawback was that detailed management was required and the interface between the host and the printer became extremely complex.

The present invention solves the drawbacks of the prior art as described above. Specifically, the present invention includes a receiving means for receiving print code data from a main control section, a storage means for storing the print code data for a plurality of pages,
a recording means having a converting means for converting the code data in the storage means into recording dot data; and a jam detecting means for performing recording based on the recording dot data converted by the converting means and detecting a paper jam; and a control section storing a control program for controlling storage and reading of the print code data in the storage means and conversion operation of the conversion means, and the recording means receives an end signal indicating the end of printing and a jam detection means. An output signal indicating the number of jammed sheets is output, and the control section controls which page of print code data in the storage means is to be reprinted based on the received end signal and the output signal. The purpose is to provide an information output device for the following purposes.

As described above, the present invention provides a method for storing data in a storage means for storing print code data for a plurality of pages;
In an information output device consisting of a control section that controls readout and a recording means, the recording means sends an end signal indicating the end of printing and an output signal indicating the number of jammed sheets to the control means, so that the recording means outputs information to the storage means. It becomes possible to accurately judge which stored page should be retransmitted.

Moreover, since the control unit can decide which pages should be reprinted at its own discretion without asking the main control unit to make a decision, there is no need to convey detailed information regarding jams from the recording side to the main control unit, and the main control unit The interface with can be simplified.

In this way, not only can the burden on the main control unit and the interface with the main control unit be reduced, but also there is no missing or overlapping pages that are lost due to jams.
It can be reproduced exactly as if there were no jams.

Embodiments of the present invention will be described below with reference to the drawings.

First, the system configuration will be explained using FIG. 1.
The system is composed of a host computer 150, a controller 151, and a laser beam printer 156.

The Centronics interface 152 is for the controller 151 to receive text information from the host computer.

The controller 151 is controlled by a controller control section 153 consisting of two microcomputers CPU1 and CPU2.

The CG controller 154 is for converting coded character data into a dot pattern for recording. The interface 155 is for outputting dot pattern data to a laser beam printer 156.

157 is a basic memory consisting of completely erasable random access memory (hereinafter referred to as RAM), and a page for storing one page of text information.
It has two memories (PRM) and two line memories (LRM) for storing one line of text information, as well as an area for storing dot patterns of some characters and a memory area from the host computer. It has a table that converts text information specified by an external code into an internal code.

The basic memory 158 is a read-only memory (hereinafter referred to as
(referred to as ROM).

External memory (EXM) 159 to 162 is an area for storing dot patterns such as kanji characters that are not normally used, and can be added as an option. Additionally, EXM1 has a table for converting external codes to internal codes.

Next, the processing method will be explained using the memory configuration formula shown in FIG. 2-1 and the general flowchart of CPU(1) and CPU(2) shown in FIG. 2-2.

The CPU (1) 209 and the CPU (2) 210 execute their respective processes asynchronously, and synchronize by handshaking by exchanging flags during data transfer.

First, the CPU (1) 209 is connected to the font data RAM 204 that stores dot patterns and EXM1 to EXM.
4, and convert the external code (ASCII, etc.) corresponding to the registered character into an internal code and store it in page memory 1 (PRM(1)) 202. Create text information for pages.

It also handles various types of errors.

First, registration of dot patterns (fonts) will be explained.

After being reset, CPU (1) initializes and receives data from the host computer. This data is sent in the form of commands that follow a certain format. The CPU (1) analyzes this data, determines the command, and performs processing according to the command. When a command to register dot pattern data comes, the font data RAM 204 or EXM1
Dot patterns are written in 59 to 162, and addresses in which the dot patterns of each character are registered are written in the table. After the registration is complete, one page of text information is sent to the host computer 150.
It is sent from. I received this article information
The CPU (1) analyzes the information (code), refers to the table created when registering the dot pattern, creates an internal code, and writes one page to the page memory PRM (1) 202 according to the format instructed in advance by a command. Write the information for the minute. Font data ROM
Since a table has already been created for the characters in 203, that table will be accessed. After creating one page of text information in this way, one page of information is transferred from PRM(1) to PRM(2).
Perform DMA (direct memory access) transfer. However, since CPU(1) and CPU(2) perform processing asynchronously, CPU(1)
Notify CPU(2) that DMA transfer will be performed, CPU(2)
I'm waiting until it's ready. and CPU(2)
DMA transfer is performed only after the preparation is complete. The handshake between CPU(1) and CPU(2) is
This is done by exchanging flags through the control port 208 that can be commonly accessed by CPU(1) and CPU(2).

When the CPU (1) finishes transferring one page of text information to the CPU (2), it also receives the next page's information from the host computer 100 and performs processing to create a new page of text information in PRM1. .

On the other hand, the CPU (2) 210 receives one page of text information in the page memory PRM (2) 207, and uses this information to output the information to the laser beam printer.
The information for the line is stored in the line memory LRM 206.

One page of text information contains character data, ruled line data, and commands, so the CPU (2) retrieves these three types of data from the page memory PRM (2) and sends them to the laser beam printer. Convert to the format to be output to line memory LRM2.
Write to 06.

CPU (2) repeats the process of creating one line of information for the number of lines and outputs one page of information.
You will have to wait for the next page of information to be transferred.

Further details of the apparatus are provided below.

FIG. 3 is a perspective view showing an outline of a recording device using a laser beam.

In FIG. 3, 301 is a laser oscillator;
2 is a reflecting mirror, 303 is a modulator, 304 is a beam expander, 305 is a rotating polygon mirror, 307 is a .theta. lens, 308 is a photosensitive drum, and 311 is a recording paper.

A laser beam oscillated by a laser oscillator 301 is guided to an input aperture of a modulator 303 via a reflecting mirror 302. The reflecting mirror 302 is inserted to bend the optical path in order to reduce the space of the apparatus, and can be removed if unnecessary.

For the modulator 303, an acousto-optic modulation element using a known acousto-optic effect or an electro-optic element using an electro-optic effect is used.

In the modulator 303, the laser beam is modulated in intensity according to the input signal to the modulator 303.

In addition, when the laser oscillator 301 is a semiconductor laser, a gas laser, etc. that can perform current modulation, or an internally modulated laser that incorporates a modulation element in the oscillation optical path, The modulator 303 is omitted and the beam is guided directly to the beam expander 304.

The beam diameter of the laser beam from the modulator 303 is expanded by a beam expander while remaining a parallel beam. Furthermore, the laser beam whose beam diameter has been expanded is incident on a polyhedral rotating mirror 305 having one or more mirror surfaces. The polyhedral rotating mirror 305 is mounted on a shaft supported by a high-precision bearing (for example, an air bearing) and is driven by a motor 306 that rotates at a constant speed (for example, a hysteresis synchronous motor, a DC servo motor). Accordingly, the horizontally swept laser beam 312 is imaged as a spot on the photosensitive drum 308 by the imaging lens 307 having the .theta. characteristic.
In a general imaging lens, when the incident angle of a light ray is θ, the position of the image on the image plane has the following relationship: γ=・tanθ−(1) (: focal length of the imaging lens), and this example As shown in FIG. 3, the incident angle of the laser beam 312 reflected by the fixed polyhedral rotating mirror 305 to the imaging lens 307 changes linearly with time. Therefore, the moving speed of the imaged spot position on the photosensitive drum 308, which is the image surface, changes non-linearly and is not constant. That is, the moving speed increases at the point where the angle of incidence increases. Therefore, when a row of spots is drawn on the photosensitive drum 308 by turning on the laser beam at regular time intervals, the spacing between the spots will be wider at both ends than at the center. To avoid this phenomenon, the imaging lens 307
is designed to have the characteristic γ=・θ −(2).

Such an imaging lens 7 is called a θ lens.

Furthermore, when collimated light is imaged into a spot by an imaging lens, the minimum diameter of the spot dmin is: dmin=λ/A − (3) where: focal length of the imaging lens λ: wavelength of the light used A: It is given by the entrance aperture of the imaging lens, and if λ is constant, a smaller spot diameter dmin can be obtained by increasing A. The beam expander 304 mentioned above is used to provide this effect. Therefore, the necessary
If dmin is obtained by the beam diameter of the laser oscillator, the beam expander 304 is omitted. The beam detector 318 includes a small entrance slit and a fast response time photoelectric conversion element (e.g.
PIN diode). Beam detector 318
detects the position of the swept laser beam 312, and uses this detection signal to determine the start timing of the input signal to the modulator 303 for providing desired optical information on the photosensitive drum. As a result, errors in the division accuracy of each reflective surface of the polyhedral rotating mirror 305 and synchronization deviations of horizontal signals due to uneven rotation can be greatly reduced, and a high-quality image can be obtained. The tolerance range of accuracy required for the drive motor 306 is increased, and the drive motor 306 can be manufactured at a lower cost.

As described above, the deflected and modulated laser beam 312 is irradiated onto the photosensitive drum 308, visualized by a known electrophotographic processing process, and then transferred and fixed onto the recording paper 311 and output as a hard copy.

FIG. 4 shows an example of a control block diagram of the laser beam printer of FIG. 3 according to the present invention.

In the figure, 100 is a magnetic tape (MT), 101 is an interface for exchanging information signals with the MT 100, 102 is a first control unit, 1
03 is a data selector that switches data address bus lines, etc.; 104 is a page storage device that stores text information for one page; 105 is a second control unit that converts the contents of the first storage device into columns; and 106 is a data selector. , 107 and 107' are first and second column storage devices each having one column of information obtained by column conversion of the input text information by the second control unit 105. 108 is a data selector, 109 is a character generator, and this output signal 303S is input to the modulator 303 in FIG. 3, so that character information is formed on the photosensitive drum 308. 318S is the signal from the beam detector.

FIG. 5 shows an input format for text information, and FIG. 6 shows a state in which text information is recorded on recording paper. An arrow 11 in FIG. 5 indicates an input direction, and input is made along the direction of the arrow 11. Arrow 12 in FIG. 6 indicates the output direction to the recording medium (main scanning direction), and arrow 13 indicates the moving direction of the recording medium (sub-scanning direction).

Now, when text information is continuously input line by line, the information is received by the interface 101 and supplied to the first control unit 102. In this case, the first control section 102 controls the data selector 103 and directs the page storage device 104 toward the first control section 102 . Then, the supplied text information for each line is sequentially stored in one storage device 104. As a result, one page of text information is stored in the page storage device 104 in a format corresponding to the input format shown in FIG. When all text information for one page is stored in the page storage device 104, the first
The control unit 102 switches the data selector 103 to connect the second control unit 105 and the page storage device 104, and instructs the second control unit 105 to start printing. Then, the photosensitive drum 308 starts rotating, and the photosensitive surface of the photosensitive drum 308 is charged by the charger. In parallel with this, the second control unit 105 performs a column conversion operation (described later) from the text information in the page storage device 104 to perform one column's worth of information ("Kan", "X" in the example of FIGS. 5 and 6). ”, “1”, “A”) are transferred to the first column storage device 107'. In this case, the data selector 106 is connected to the second control unit 105 and the first column storage device 10.
7, the data selector 108 couples the character generator 109 and the second column storage 107'. The character generator 109 inverts the data selectors 108 and 106 in response to the first detection signal from the beam detector 318 in the recording device, so that the character generator 109 and the first column storage device 107 are coupled.
The second control unit 105 and the second column storage device 107' are coupled. Naturally, the first
The column storage device 107 completely stores the information in the first column of text information. At the same time, character generator 1
From 09 onwards, an interrupt is generated in the second control unit 105.

At the same time as these processes, the character generator 109 transfers the last line character (in this example, "Kan") among the characters to be recorded in the first column of the recording paper (text information) from the first column storage device 107. ) and select the corresponding character (“Kan”)
The dot information signal 303S of the first column is output from the character generator 109. This signal 303S modulates the modulator 303 and exposes a latent image corresponding to the dot information in the first column of the last row of characters among the characters to be recorded in the first column of the recording paper (text information). Formed on drum 308. Next, among the characters to be recorded as the first column of text information on the recording paper, the character in the second line from the last line (in this example, “X”)
The first column of dot information is output from the character generator 109, which modulates the modulator 303 to form its latent image on the photosensitive drum. This operation is performed by creating a latent image of each character (“Kan”, “X”, “1”, “A”) to be recorded in the first column of the recording paper (text information) for the dot information in the first column. This process is repeated until all the latent images of the characters in the first column of the recording paper (text information) are completely formed. For example, if the characters are formed by a 16 x 32 dot matrix, regardless of the number of characters in the first column of text information.
Repeated 16 times.

While this scanning is repeated 16 times, the second control unit 105 receives the second text information due to the previous interruption.
Each character to be recorded as a column is recorded in the page recording device 1.
04, the data are sorted while performing column conversion operations, and transferred to the second column storage device 107'. It goes without saying that this operation must be performed reliably during 16 scans. When the character generating device 109 finishes forming all the character information in the first column storage device 107 as a latent image in this way, that is, when the 16 scans are completed, the data selectors 106 and 108 are reversed again, and at the same time the second control section 105 generates an interrupt.

This time, the character generator 109 and the second column storage device 1
07' is coupled, the second control unit 105 and the first column storage device 107 are coupled, and the above repetition is executed.

As this repetition progresses, 1 in the page storage device 104
The second control unit 105 generates a completion signal to the first control unit 102 at the time when all of the text information for a page has been converted into a latent image.

If copying is required, the first control unit 102 instructs to start printing again and repeats the same process.

FIG. 7 shows another example of the control block diagram.

In FIG. 5, parts having the same functions as those in FIG. 4 are given the same numbers. Reference numerals 203 and 203' designate data selectors for switching bus lines for data addresses, and reference numerals 204 and 204' designate first and second page storage devices that each store one page's worth of text information.

Now, when text information is input consecutively line by line,
The information is received by the interface 101 and provided to the first control unit 102'. At this time, the first control section 102' controls the data selector 203, and the first control section 102' controls the data bus 21 from the first control section 102'.
1 and the data bus 212, and the text information is connected to the first
Written to page storage 204. Meanwhile, at this time, the data selector 203' connects the bus line 214 from the second page storage device 204' and the bus line 216 to the second control section 105'.

The text information on the first page input line by line in this manner is sequentially stored in the first page storage device 204 in a form corresponding to the input format shown in FIG.

All text information for one page is stored in the first page storage device 204
, the first control unit 102' switches the bus line selection of the data selector 203', and the data selector 203' selects the bus lines 215 and 216.
1 stored in the first page storage device 204.
The page information is output to the second control section 105'.
The second control unit 105' executes the column conversion operation described in FIG. On the other hand, the first control section 102' is completely free from the time when the control of the recording device is transferred to the second control section 105' until the recording is completed.
The page storage device 204' is also in an idle state. Therefore, the first control section 102'
3' connects bus lines 215 and 216, and at the same time, data selector 203 connects bus lines 211 and 213. As a result, at the same time as the first page information stored in the first page storage device 204 is output, the first control unit 102' outputs the second page information to the second page storage device 204' via the interface 101. It becomes possible to memorize.

When the reception of the text information of the second page is completed and the recording completion is confirmed from the second control unit 105', the data selectors 203 and 203' are switched again, and the second page memory The device 204' and the first control section 102' are coupled to the first page storage device 204, and a print instruction is issued to the second control section 105', and this operation is repeated.

Since data writing and reading can be performed in parallel in this way, efficient data transfer and continuous recording without waiting time are possible.

The column conversion method performed by the second control units 105, 105' will be described. page storage devices 104, 204,
Text information is input line by line to 204' as described above. Here, it is assumed that a maximum of 132 characters are input per line (this number of characters is Imax) and a maximum of 66 lines per page (this number of lines is Jmax). Therefore, the format of the input page information is as shown in FIG. Each block BK in FIG. 8 is organized by character, and the numbers within the block BK indicate the order in which they are input. This input information is stored in the page storage devices 104, 204, 20
4', for example, as shown in FIG. 9, they are stored in order starting from the first row.

To convert this into columns, C _o = (66-V)・132+W ...(1) V: Number of columns after column conversion 1, 2, ..., 66 W: Number of columns after column conversion 1, 2, ...132 C _o : Numerical numbers 1, 2, ..., 8712 in block BK In other words, the numerical number C _o in block BK is applied to row W and column V after column conversion. Therefore, first W=1
output by changing V sequentially from 1 to 66,
Next, by setting W=2 and varying V from 1 to 66, output is made.If this is repeated until W=66, the output as shown in FIG. 10 can be obtained.

If this is extended to a general formula, C _o =(Jmax-V)·Imax+W (2) holds true. According to formula (2), W=1 V=1, 2, 3,..., Jmax W=2 V=1, 2, 3,..., Jmax 〓 〓 W=ImaxV=1, 2, 3,..., Jmax Column conversion can be performed by outputting in this order.

With such a configuration, the first control section 10
2,102' converts the input code to internal code,
Since information is stored in the page storage units 104, 204, and 204', and the second control unit performs column conversion, an efficient control system can be formed.

For example, if you want to input kanji or special shapes,
JIS C 6228-1975 “Extension method for information exchange codes”
When input from an external source using a code system that conforms to
Just interpreting this meaning is a considerable burden.
Furthermore, column conversion operations are performed and the page storage device 104,
If information is stored in (204, 204'), it will take a considerable amount of time from the start of code input until the print instruction is issued, which is undesirable in terms of overall efficiency (throughput). In this embodiment, regardless of whether it is in portrait or landscape mode, the pages are stored in the order of the codes input to the page storage device, so pages can be stored in the minimum amount of time, and when page storage is completed, the print state immediately returns. Since the column conversion is performed through gaps in the recording system where there is sufficient time, the overall efficiency (throughput) is improved. Furthermore, by having a plurality of page storage devices, reception of text information for the next page is completed before recording of the previous page is completed, so that the maximum throughput can be obtained.

Note that when column conversion is not required (recording in vertical mode), the second control unit 105, 105' converts the information input row by row into the page storage devices 104, 204, 204' as it is, row by row. column storage device 107,1
Transfer to 07'. That is, column storage devices 107, 10
7' stores information for one line. The vertical and horizontal mode signals are transmitted through the interface 101 and the first control unit 10.
The signal is input from the MT 100 to the second control unit 105, 105' via 2, 102'. Second control unit 10
5, 105' determines whether or not to perform column conversion by determining the vertical and horizontal mode signals.

The output device has been explained above, and FIG. 11 shows a more easily understandable version. As for the processing procedure in FIG. 11, first, one page of text information is output from the host computer 601, synchronized with the microcomputer of the first control unit (CPU 1) at the interface 602, and the text information is received. is stored in the first page storage device. Upon receiving one page of text information, the CPU 1606 summarizes the information in the first page storage device 603 and stores it in the second page storage device 604.
Transfer to.

The second control unit (CPU2) 607 outputs the information in the second page storage device 604 to the recording device 605, and the recording device outputs a character code for each line, generates a necessary character signal according to it, and performs recording.

The CPU 1606 and the CPU 2607 execute processing asynchronously, and are synchronized only when transferring data between the page storage devices.
While outputting the information of 04 to the storage device 605
The CPU 1606 can perform parallel processing to import data from the host computer 601 to the first page storage device 603. The CPU 1606 mainly registers characters and stores text information in the first page storage device 603 according to the format.
The CPU 2607 controls the recording device 605 and outputs the text information in the second page storage device to the recording device line by line.

As described above, CPU2 controls the recording device.
In addition to these basic controls, the controls in the CPU1 and CPU2 include error detection and associated error processing.

These errors include errors related to software and farm (SYNTAX) managed by CPU1.
ERROR CG MEMORY FULL) Hardware error (PARITY ERROR HARD ERROR)
etc., and are further managed by CPU2 related to the present invention.
There is a JAM ERROR (paper jam in the printer).

In this embodiment, the CPU 2 directly controls the recording device 6.
Error information is obtained from 05, and control is performed to prevent pages from being omitted or overlapped in the event of a jam (paper jam).

For this purpose, the second control section 607 has an auxiliary storage section (auxiliary page storage device 609) for storing text information for several output pages.

FIG. 12 shows the contents of each device in the system of FIG. 11.

601 in Figure 11 is 701 and 603 in Figure 12
is 702, 604 is 703, 605 is 704, 6
09 corresponds to 705, respectively.

First, the second control unit auxiliary page storage device 705 stores one page of text information of different types on PAGE1.
There are 4 pages from page 4 to page 4, and there is a counter for the number of copies each.
There are 4 from COUNT1 to COPY COUNT4. (In this embodiment, the counter is stored in the auxiliary memory, but it can also be stored in the first control section or the second control section.) The text information actually recorded is PRINT1→
The order is PRINT2→PRINT3→PRINT4, but in the case of copying, the information of PRINT3 in 703 is sent to PRINT2 under the control of the second control unit 607 for the number of copies.

The jam processing will be explained using the block diagram of FIG. 12 and the table of FIG. 13, assuming that PAGE 1 to PAGE 4705 are continuously recorded.

First, let's assume that the text information for each page is included in PRINT1 to PRINT4, as shown in the table in Figure 13.

The second control section monitors the print end signal from the recording device and senses whether a jam error has occurred before issuing a printout signal for outputting one page of text information.

There are three types of jam errors: JAM3 which is a jam which is outputting the information of PRINT1, JAM2 which is a jam which is outputting the information of PRINT2, and JAM1 which is a jam which is outputting the information of PRINT3.

The second control unit 607 outputs the text information of each page sequentially sent from PAGE1 to the recording device 704 and also outputs it to the auxiliary page storage device 705. Each time a print end signal is detected, the counter COPY COUNT is decremented, and if the output of text information for that page is successfully completed, the information in the auxiliary page storage device 705 is also cleared.

If a jam occurs during this process, the error information notified from the recording device and the current COPY
Compare the count number of COUNT and restart
The COPY COUNT count number is corrected and data is created in the recording device 704 again.

For example, if we consider the case of state 1 in Figure 13, if JAM3 is returned as error information, the second
The control unit retransmits the data from PAGE1. If JAM2 is returned, retransmit from PAGE2. (In Figure 12, the return of JAM2 means that
JAM3 (that is, PRINT1 does not cause JAM and ends normally) If JAM1 is returned,
Since the output of PAGE1 and PAGE2 has finished,
Resend from PAGE3.

In the case of the next state 2, if JAM3, PAGE1
Leave the COPY COUNT1 count as is and resend from PAGE1. For JAM2
Since the first page of PAGE1 is finished, PAGE1
Decrease the count number of COPY COUNT1 by 1
Resend from PAGE1. For JAM1, PAGE1
COPY COUNT1 count number is 2 and PAGE
Since the output of 1 has ended, it will be retransmitted from PAGE 2.

If it is JAM3 in state 3, it is retransmitted from PAGE1. For JAM2, COPY of PAGE2
Leave the count number of COUNT2 as is and PAGE
Resend from 2.

For JAM1, COPY COUNT2 of PAGE2
Decrease the count by 1 and retransmit from PAGE2.

If it is JAM3 in state 4, it is retransmitted from PAGE1.

For JAM2, COPY COUNT1 of PAGE1
Decrease the count number by 1 and retransmit from PAGE1. If it is JAM1, COPY COUNT of PAGE1
Decrease the count number of 1 by 2 and retransmit from PAGE1.

In this way, the CPU 2 controls pages to be retransmitted in response to the print end signal from the recording device and the signal indicating the number of jammed sheets.

In this example, an electrophotographic recording device using a laser beam was used as the output device, but instead of the laser beam, an electrophotographic device using an OFT (optical fiber tube) or a needle electrode, or even an inkjet output device could be used. It can be implemented according to the method.

If the processing described above is carried out, it is possible to obtain the same output as normal even when a jam occurs. Furthermore, a feature of this embodiment is that, compared to a case where the main control section has an auxiliary storage device, the main control section does not require a program for jam processing or an auxiliary storage device, so the main control section may be small. In addition, when data is transferred from the main control unit side, the transfer speed may be slow and it may take time to clear the jam, but if it is stored internally as in this embodiment, it can be handled by internal firmware and hardware, so jams can be prevented. This makes it possible to take prompt action. or,
Compared to the case where the control unit that creates font registration and page-by-page text information, that is, the CPU 1 side, has an auxiliary storage device, there is no need to transfer data for JAM processing with the CPU 1 side as shown in Figure 12. It can be dealt with by itself, and there are few handshake programs between CPU1 and CPU2 for jam processing, so there is no complexity.

[Brief explanation of drawings]

Figure 1 is an overall system configuration diagram, Figure 2-1 is a memory configuration diagram of the system, Figure 2-2 is a system flowchart, Figure 3 is a perspective view of a recording device using a laser beam, and Figure 4 is the first recording device in Fig. 3.
FIG. 5 is a diagram showing the input form of text information, FIG. 6 is a diagram showing a state in which text information in horizontal mode is recorded, and FIG. Control block diagram, Figures 8 to 10 are diagrams for explaining the column conversion method, Figure 11 is a block diagram of the system configuration, Figure 12 is a system configuration diagram for explaining jam processing, and Figure 13. is a diagram summarizing the state of jam.

Claims (1)

[Scope of Claims] 1. Receiving means for receiving print code data from the main control unit; Storage means for storing the print code data for a plurality of pages; Conversion for converting the code data in the storage means into dot data for recording. a recording means having a jam detection means for performing recording based on the recording dot data converted by the conversion means and detecting a paper jam; storing and reading the print code data in the storage means and the conversion means a control unit storing a control program for controlling the conversion operation of the printer; the recording unit outputs an end signal indicating the end of printing and an output signal indicating the number of jammed sheets of the jam detecting unit; An information output device characterized in that it controls which page of print code data in the storage means is to be reprinted based on the received end signal and the output signal.