JPH09261388A - Copying controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange reading and recording completion timings by starting recording when a recording start point calculated from the total line number of an original, reading speed and recording speed coincides with a count value. SOLUTION: Reading speed is adopted as S1, recording speed is S2, the total line numbers of the A4-sized and B4-sized originals are L1 and L2, the storing register is R1 and a reading line counter is R2. Then, the line number L1 or L2 is set in the register R, CPU 6 executes an operation so as to calculate the recording start point and starts original reading. The original is read at every line, one is added to the value of the counter R2 each time and recording is started when the counter R2 value becomes equivalent to R1-R1×S1/S2. When the reading line ends and the register R1 value becomes equivalent to the counter R2 value, reading is completed. Thus, the reading and the recording completion timings coincide even when reading is started first so that a reading system is not required to be high-speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various copying apparatuses such as a copying machine and a facsimile that digitally read an original document by a scanner and output the read image data to a printer for recording. .

[0002]

2. Description of the Related Art Conventionally, two modes of direct copy and memory copy are known as copying operations in this type of apparatus.

Of these, in the direct copy, one line cycle of the printer and one line cycle of the scanner are set to be the same, and the reading and the recording are completely synchronized and the copying is performed line by line.

Further, in the memory copy, the document is completely read by the scanner and stored in the image memory,
The printer is started, image data is transferred from the memory, and is recorded by the printer.

[0005]

However, each of the above-mentioned conventional techniques has the following drawbacks.

First of all, in the direct copy, since the reading by the scanner must be synchronized with the line cycle of the printer, the reading has to be done at high speed in recent years when high-speed printers have become commonplace. It is necessary to speed up the optical system and the system including the CPU.

[0007] Therefore, as a result, the system becomes complicated, which also causes a cost increase.

In memory copy, since one original is stored in the memory, a large-capacity memory for the maximum original size must always be prepared in the system, and a large amount of expensive semiconductor memory is required. Therefore, it becomes a factor of a large cost increase.

Further, in the operation sequence, since the recording operation is started after the reading operation is completed completely, the copying sequence becomes serial, so that the time becomes long and, as a result, the copying speed, especially the first copying becomes slow. .

It is an object of the present invention to provide a copy control device capable of improving the above drawbacks of direct copy and memory copy.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a reading means for reading an original document line by line at a predetermined reading speed, a counting means for counting the number of lines of the read original document, and the read original data are stored line by line. Memory, a printer for recording the original data stored in this memory line by line at a recording speed faster than the reading means, and the total number of lines of the original corresponding to the original size, the reading speed, and the recording speed. Control means for comparing the recording start point and the count value of the counting means, and for causing the recording means to start recording of one original document being read when the count value coincides with the recording start point. Is characterized by.

The recording start point may be calculated by calculation at the time of recording, or the calculated recording start point may be stored in a predetermined table and referred to at the time of recording.

With such a configuration, according to the present invention, recording is performed when the recording start point calculated from the total number of lines of the original corresponding to the original size, the reading speed, and the recording speed and the count value of the counting means match. By starting it, it is possible to match the reading end timing with the recording end timing even when reading is started first, and the copy speed is shortened.

Further, at the start of recording, it is judged from the temperature control state of the thermal fixing device of the printer whether or not recording is possible, and the recording operation is carried out only when the recording is possible. Wait until the temperature of the vessel is adjusted).

The recording start point is set to the reading speed S
1, the recording speed is S2, and the total number of lines of the document to be read is R1, R1−R1 × (S1 / S2) lines, and the recording operation is started at the timing read up to this point.

With the above configuration, the optical system including the reading system slower than the recording speed of the printer and the low-speed and simple system system can realize the optical system, and the disadvantage of the direct copy can be improved. In addition, since a large-capacity memory such as a page memory is not required and the reading operation and the recording operation are not performed serially, the copy sequence is short, and as a result, the first copy is not delayed, and the drawback of the memory copy can be improved. .

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention.

The motor 1 is a reading motor for conveying a document, and the sensor 2 is a document width sensor for detecting the size of the document. The reading device 3 includes an optical system for reading a document, a document transport mechanism, and the like, and the image processing circuit 4 is a processing circuit that binarizes the read image and digitally processes it.

The I / O port 5 is for inputting information such as a document sensor, and the CPU 6 is for controlling the entire system. The ROM 7 stores programs for the CPU 6 to control the system,
The RAM 8 stores various data used in this system. The line buffer 9 stores the read image data line by line.

The DCNT 10 is an LBP which is a printer.
It controls the (laser beam printer) 11 and controls the temperature of the printer (the temperature of the thermal fixing device of the laser beam printer). Further, the LBP (hereinafter, referred to as a printer) 11 has a thermal fixing unit whose temperature can be adjusted.

2 and 3 are flow charts showing the operation of this embodiment having the above-mentioned structure. FIG.
FIG. 3 shows a main routine, and FIG. 3 shows a subroutine controlled by interrupt processing.

First, in FIG. 2, when the original is set in S1 and copy start is pressed in S2, the system sends a preheat command to the printer 11 to start the temperature control of the heater of the printer 11, and The driving of the high-voltage circuit is started, and further processing such as pre-rotation of resist is started (S3). Similarly, a laser scanner ON command is sent to the reading device 3 to start the rotation of the scanner motor (S4). Then, the reading start flag for starting reading is turned on (S4a).

Here, the recording start flag controlled by the interrupt process shown in FIG. 3 is checked (S5), and if the recording start flag is ON, the recording start instruction is issued. Start processing.

First, whether the temperature of the heat fixing device of the printer 11 can be recorded is checked by the temperature adjustable status (S
6) If possible, send a print command to the printer 11 to instruct to start recording (S7). Next, if the printer 11 is in the image data transferable state (S
8), the image data is continuously sent line by line from the line buffer 9 (S9). Then, when all the image data from the line buffer 9 is transferred and recording is completed (S1
0), the previous reading start flag is returned to OFF (S10
a), the copy operation ends.

Next, the subroutine of FIG. 3 will be described.

Here, the reading speed is S1 and the recording speed is S
2, the total number of lines for A4 originals is L1, the total number of lines for B4 originals is L2, and the register for storing these total numbers is R
1. If the counter that counts the read lines is R2, the point T at which recording starts is T = R1−R1 ×
This is when the (S1 / S2) lines have been read.

Therefore, first, the reading start flag controlled in the main routine is checked, and this flag is set to 0.
If it is N (S11), it is an instruction to start reading, so the width of the document to be read is detected (S12).

If the document size is A4 from the document width, L1 which is the number of lines of A4 is set in the R1 register (S13). Similarly, if the document size is B4, L2 is set (S14).

After the total number of lines to be read is set in the R1 register in this way, the CPU 6 calculates the recording start point and starts reading the original (S1).
5). Then, the manuscript is read line by line, each time
1 is added to the R2 counter (S16).

When the value of the R2 counter reaches the recording start point T (S17), the recording start flag is turned on (S18), and the system is declared to be the recording start point. In addition, since the original to be read still remains,
The reading operation is further continued, but when the reading line is finished and R2 = R1 after that, the reading is finished (S
19), the recording flag is turned off (S20), and the operation ends.

Normally, in a printer, the time required for completing the temperature control of the fixing unit in the standby state is several seconds, and therefore, the determination of the temperature control in S6 of FIG. 2 is ignored in sequence. It's time to do it. Therefore,
By determining the recording start point by the control as described above, the end of recording and the end of reading are almost simultaneous.

In this way, a simple system in which the reading system is slower than the printer can be realized as compared with the direct copy, and the memory capacity can be reduced and a quick copy sequence can be obtained as compared with the memory copy. be able to.

In the above embodiment, the recording start point was calculated by calculation at the time of recording. However, the recording start point calculated in advance assuming various conditions is stored as a table, and this is referred to at the time of recording. Then, the recording start point may be obtained.

[0034]

As described above, according to the present invention,
By starting recording when the count value of the number of lines read matches the recording start point during reading, which is calculated from the total number of lines of the document corresponding to the size of the document to be read, the reading speed, and the recording speed, Even when reading is started, it is possible to match the reading end timing with the recording end timing, and it is possible to provide an inexpensive device compared to direct copy without increasing the speed of the reading system, and at the same time, memory Compared to copy,
This has the effect of reducing the copy speed.

Further, since a memory for storing one page of the original document is unnecessary, an expensive image RA is required as compared with the memory copy.
Since there is no need for M, there is an effect that the cost can be reduced also in this respect.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing a main routine of the above embodiment.

FIG. 3 is a flowchart showing a subroutine of the above embodiment.

[Explanation of symbols]

 1 ... Motor, 2 ... Sensor, 3 ... Reading device, 4 ... Image processing circuit, 5 ... I / O port, 6 ... CPU, 7 ... ROM, 8 ... RAM, 9 ... Line buffer, 10 ... DCNT, 11 ... LBP .

Claims (6)

[Claims] 1. A reading unit for reading an original document line by line at a predetermined reading speed; a counting unit for counting the number of lines of the read original document; a memory for storing the read original data line by line; A printer for recording the recorded original data line by line at a recording speed higher than that of the reading means; a total number of lines of the original corresponding to the original size,
The reading speed and the recording start point calculated from the recording speed are compared with the count value of the counting means, and when the count value matches the recording start point,
And a control unit for causing the recording unit to start recording one original document which is being read. 2. The recording start point according to claim 1, wherein the detection means for detecting the document size and the total number of lines of the document corresponding to the document size detected by the detection means, the reading speed, and the recording speed are calculated. A copy control device characterized by being a thing. 3. The control unit according to claim 1, wherein the storage unit stores a recording start point calculated in advance on the basis of the total number of lines of the document corresponding to the document size, the reading speed, and the recording speed condition. A copy control device for reading a recording start point. 4. The printer according to claim 1, further comprising a temperature detecting unit that detects a fixing temperature of the printer, wherein the control unit prints the printer when starting a recording operation from the recording start point. Depending on the temperature detection result of
A copying control apparatus, which starts a recording operation when the temperature can be recorded. 5. The recording start point according to claim 1, wherein R1 is R1 × (S1), where S1 is a reading speed, S2 is a recording speed, and R1 is a total number of lines of a document to be read. / S2), and the control means starts the recording operation when the reading means reads the document up to the recording start point. 6. The recording apparatus according to claim 1, wherein when recording is started from the recording start point, at least part of the recording operation of the printer is performed in parallel with the reading operation of the reading unit. A copy control device characterized by the above.