JP3271851B2 - Facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, and more particularly to an improved facsimile apparatus for setting a read start timing and an image data processing start / end timing.

[0002]

2. Description of the Related Art Conventionally, in a normal facsimile apparatus, a CCD (Charge Coupled Device) having a large number of light receiving elements is used.
An original is read by a reading device including a reading head consisting of
The image data is converted into valued image data and stored in a read buffer. The image data stored in the read buffer is converted into compressed and encoded compressed image data by a microcomputer in a control unit of the facsimile apparatus and transmitted. The compressed image data stored in the buffer and stored in the transmission buffer is transmitted to the other party's facsimile machine via the communication line.

The reading head reads a document in the form of a line in the paper width direction using a CCD having 2500 light receiving elements, for example. The paper width of a B4 size document which is the largest paper width corresponds to 2048 light receiving elements. , A4 size document corresponds to 1728 light receiving elements. Normally, when a document is read and transmitted, a B4 size document (B
4 document) also, A4 size original (A4 document) also the width of the center, so as to set off <br/> Akushimiri apparatus in a state in which substantially coincide the center of the read head.

In the above case, referring to FIG. 8, when reading an original, 2500 light receiving elements of the reading head are synchronized with a clock signal CLK of a predetermined frequency for each scan (each raster). Reading is started in order from one end of the document. When a start pulse SP for instructing the reading start is supplied from the microcomputer to the reading head, the reading is started. The process of storing the image data in the read buffer is started at the rising edge of the created start / end command Si, and the data storing process is ended at the falling edge of the start / end command Si. That is, only the image data read during the period from the rising to the falling of the start / end command Si is stored in the read buffer, and the compression encoding process is performed.

[0005]

Since the start pulse SP and the start / end command Si are originally set based on the B4 document having the maximum paper width, there is no particular problem when reading the B4 document. . However, when reading an A4 document, if reading is started based on the illustrated start pulse SP, the difference between the paper width of the B4 document and the A4 document is 1 /.
Since the image data read during 160 CLK corresponding to 2 is invalid data, the microcomputer counts the image data after starting reading, and after counting 160 invalid data, the microcomputer reads the image data into the read buffer. The data storage processing is started, and thereafter, 1728 image data are counted, and when the data processing is completed, the data processing is ended. Thereafter, after 160 invalid data are counted, the compression encoding processing of the image data is started.

As described above, when reading and transmitting an A4 document, the microcomputer performs not only the data storage processing of the image data in the reading buffer, the compression encoding processing, the transmission control, but also the invalid data and the image data. The load on the CPU of the microcomputer is increased by the execution of the count, and the processing time for compressing data from the read buffer and transferring it to the transmission buffer is reduced because the compression encoding processing time is short. There is a problem that read interruption (transmission error) or the like due to the buffer full memory is likely to occur. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a facsimile apparatus which can reduce a data count load at the time of reading a document and does not cause reading interruption or transmission error.

[0007]

Facsimile apparatus according to 請 Motomeko 1 SUMMARY OF THE INVENTION comprises a read head comprising a plurality of read elements arranged in the paper width direction of the document in a line shape, each raster, a plurality of Reading means for reading a document in synchronization with a clock signal in order from one end of the document by a reading element,
A reading buffer for storing the image data read and digitized by the reading means, an image data encoding means for compressing the image data received from the reading buffer, and a compressed image data received from the image data encoding means. a transmission buffer for storing, in a facsimile apparatus having a transmission means for transmitting outputs the compressed image data received from the transmission buffer through the communication line, the first width of the document or narrower than the first width second Detecting means for detecting whether the document is a paper width document, counting means for counting a clock signal from "0" to "total number of a plurality of reading elements-1" for each of the rasters, and outputting the outputs of the detecting means and the counting means. receiving, with respect to read-up means, first paper width, the second width
Together with the document instructs to set the reading start timing when reading each of, for read buffer, the first sheet
And timing setting means for setting and instructing the start and end timings of the image data storage processing when reading a document having a width and a second paper width, respectively.

The timing setting means includes:
When the count value of the counting means is a predetermined small first count.
Output the first signal when the count value reaches the
At the second count value obtained by adding the count number corresponding to the width
Output the second signal and the first count value corresponds to the first paper width
The third signal at the time of the third count value
And outputs a signal equivalent to 1/2 of the difference between the first paper width and the second paper width.
4th count obtained by subtracting the counted number from the maximum count value
Count value detection means for outputting a fourth signal at the time of a reset value ;
Receiving the output of the detecting means and the count value detecting means and reading
When reading a document of the first paper width, the first
Output a read start command signal when inputting
When reading a manuscript, a read start command signal is input when the fourth signal is input
Read start command means for outputting a signal,
Receives the output of the print value detecting means and reads the original of the first paper width.
Image data to the reading buffer when the first signal is input
Storage processing is started, and the image data is stored when the third signal is input.
When the data storage process is completed and a document of the second paper width is read
Of the image data to the reading buffer when the first signal is input.
When the storage process is started and the image data is
Data processing start / end command means for ending data storage processing
And

[0009]

In the facsimile apparatus of the present invention, the reading head of the reading means is provided with a plurality of reading elements arranged in a line in the paper width direction of the document, and the reading means is provided with a plurality of reading elements for each raster. The reading element reads the document in order from one end of the document in synchronization with the clock signal. The read buffer stores binarized image data,
The image data encoding unit compresses the image data, the compressed image data is stored in a transmission buffer, and the transmission unit transmits and outputs the compressed image data via a communication line.

The detecting means detects whether the document has the first paper width or the first paper width.
It is detected whether the original is a document having a second paper width smaller than the paper width. The counting means sets the clock signal to “0” for each raster.
To “the total number of a plurality of read elements−1”. Timing setting means receives the output of the detecting means and the counting means, with respect to reading means, first width, along with commanding by the document of the second sheet width <br/> sets the read start timing when reading each , for the read buffer, the first paper <br/> width, commanding with the original of the second width to set the start and end timing of the image data storage processing when reading each.

[0011] Then, the timing setting means includes a counter value detecting means, a reading start command means, and a data processing start termination instruction means. Count value detecting means, the count value of said counting means, outputs a first signal when the predetermined small first count value, the second count value obtained by adding the number of counts corresponding to the second paper width to the first count value the second output signal when, in the third signal and outputting a first width and a difference between the second width when the third count value obtained by adding the number of counts corresponding to the second paper width to the first count value 1 / 2
A fourth signal is output at the time of the fourth count value obtained by subtracting the count number corresponding to the above from the maximum count value.

[0012] read start command means receives the output of said detecting means and the count value detecting means for reading-up means,
When reading an original of the first paper width outputs a read start command signal when the first signal input, when reading the second paper width of the document
Outputs a read start command signal when the fourth signal is input.

The data processing start / end command means includes:
Receiving the output of the detection means and the count value detecting means, when reading the first paper width of the document is stored in the image data during the storage process was initiated and the third signal of the image data input to the read buffer when the first signal input Terminate the processing, and
When reading a document having a paper width, the process of storing image data in the reading buffer is started when a first signal is input, and the process of storing image data is ended when a second signal is input.

[0014]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a main body 2 of the facsimile apparatus 1 includes a container-shaped lower cover 3, an upper cover 4 put on the lower cover 3, and a frame (not shown) provided therein. It has. Lower cover 3
Is equipped with a receiver 5. In the lower cover 3, a recording paper cassette 21 capable of storing a large number of recording papers 22 made of fixed-size cut paper is set. The facsimile apparatus 1 includes, in addition to the main body 2, an operation panel 6, a recording device 20 for recording on a recording paper 22 with a recording head 25 via an ink ribbon 27, and a line for line-feeding the recording paper 22 and the ink ribbon 27. The image forming apparatus includes a feed device 30, a document feed device 50 for feeding a document 51, an image reading device 80 for reading an image of the document 51, a control unit 100 for controlling the facsimile device 1, and the like.

First, the recording device 20, recording paper cassette 21, and line feed device 30 will be described with reference to FIG. The recording paper 22 is sent out one by one from a recording paper cassette 21 by a paper feed roller 31 and then sent to a recording device 20 by a line feed device 30, where images such as characters and figures are recorded. Line feed device 3
0 denotes a paper feed roller 31, a paper guide 32, a pair of feed rollers 33, a platen 34, a pair of paper discharge rollers 35, a pair of paper guides 36, and a paper discharge tray 3.
8, the feed roller 31, the feed roller 3, and the like.
3, a platen 34, and a paper discharge roller 35, an LF motor 4
0 (see FIG. 5), and is rotated via a gear system (not shown). Recording paper 2 sent out from recording paper cassette 21
2 is detected by the recording paper leading edge sensor 24,
The recording start timing of the recording device 20 is determined based on the detection signal. The recording paper size detection sensor 23 detects the type of the recording paper cassette 21 mounted on the facsimile machine 1 among the recording paper cassettes 21 prepared for each of various recording papers 22 having different sizes. The size of the recording paper 22 is determined based on this.

The recording device 20 is provided in the upper cover 4,
The recording device 20 is a recording head control device 1 shown in FIG.
Head 25 controlled by the control unit 8 and the print head 25
Platen 34 rotatably provided at a position facing the
And an ink ribbon cassette 26. The recording head 25 is composed of a thermal head having a large number of heating elements arranged in a line in a direction perpendicular to the direction in which the recording paper 22 is fed, and a large number of heating elements are selected based on a signal supplied to the recording head controller 18. Is heated. Platen 3
Reference numeral 4 denotes a line feed of the recording paper 22 and the ink ribbon 27 by being driven to rotate around a center line by a LF motor 40 via a gear system (not shown). The ink ribbon cassette 26 has a heat-sensitive ink ribbon 27 having a width corresponding to the recording range of the recording head 25.
The recording head 2 supplied from the supply-side ribbon roll 27a
The winding shaft 27b is wound around the winding shaft 27b through the space between the winding shaft 5 and the platen 34. The winding shaft 27b is driven to rotate in the winding direction by the LF motor 40 via a gear system. The ink ribbon 27 is line-fed in synchronization with the recording paper 22, but an image is formed on the recording paper 22 by feeding the ink ribbon 27 and the recording paper 22 and pressing the ink ribbon 27 against the recording paper 22 by the recording head 25. Be recorded.

The recording paper 22 on which the image has been recorded is guided by a paper guide 36 and sent to a paper discharge tray 38.
It is discharged outside the device. The recording paper discharge sensor 37 detects the discharge of the recording paper 22, and detects that the recording paper 22 on which the image is recorded has been completely discharged by the recording paper discharge sensor 37 when a plurality of recordings are continuously performed. Then, the line feed device 30 is controlled by the control unit 100, which will be described later, so that the next recording paper 22 is started to be fed from the recording paper cassette 21, thereby avoiding a paper jam.

Next, the document feeder 50 and the image reader 80 will be described with reference to FIG. A document feeder 50 and an image reading device 80 for reading an image recorded on the document 51 are provided in the upper cover 4.
The document 51 is placed on a document receiver 52 detachably attached to the upper cover 4 and set between a pair of document guides 53 shown in FIG.
The original 51 is detected by a pair of feed rollers 55,
The document is fed to a document reading position of the image reading device 80 by a document feeder 50 including a paper guide 56, a pair of feed rollers 57, and the like. The B set in the document receiver 52
A first original sensor 61 for detecting four originals;
Document sensor 62 for detecting an A4 document set in
Is provided (see FIG. 6). The rollers 55 and 57
Is rotationally driven by a reading motor 60 (see FIG. 5) via a gear system. The drive of the reading motor 60 is controlled by the control unit 100.

The image reading apparatus 80 includes a light source 81 as a light emitter, a lens 82, mirrors 83 and 84, and a charge-coupled device (hereinafter, referred to as a CC) having a plurality of light receiving elements as light receivers.
The light source 81 illuminates the original 51 with light, and the light reflected from the original 51 is condensed by the lens 82, reflected by the mirrors 83 and 84, and reflected by the CCD 85. The light is received and the image on the document 51 is read one line at a time. A pixel is a minimum unit constituting an image, and is an area (area) on the document 51 read by one light receiving element of the CCD.

The size of one pixel is determined by various factors such as the size of the light receiving element, the positions and angles of the mirrors 83 and 84, the position and the focal length of the lens 82, and the like.
, The size in the main scanning direction is 0.13 mm
The size in the sub-scanning direction is determined by the feed amount of the document 51 while the image reading device 80 reads one line. In the facsimile machine 1, the feed amount of the document 51 is 0.26 mm,
0.13 mm and 0.065 mm can be selected. The size (area) of one pixel when each of these feed amounts is selected is 0.13 mm × 0.26 mm, respectively.
0.13mm × 0.13mm, 0.13mm × 0.06
5 mm. As the feed amount decreases, the area of one pixel decreases, and the resolution increases.

The light receiving element of the CCD 85 is a photoelectric conversion element for outputting a voltage corresponding to the intensity of the received reflected light. The control unit 100 outputs image data obtained by converting a signal representing the magnitude of the output voltage into digital data. And binarized image data is created from the image data. B4
In the facsimile apparatus 1 capable of reading a document of a size, the CCD 85 is composed of 2500 light receiving elements arranged in a line in the paper width direction of the document 51. The leading edge of the document 51 is detected by the document leading edge sensor 58, and reading of the document 51 is started after the detection signal is input. After reading, the document 51 is discharged to the outside through the opening 59.

As shown in FIG. 3, an operation panel 6 is provided on the upper cover 4, a liquid crystal display 7 is provided at the rear of the operation panel 6, and a keyboard 8 is provided at the front and center of the operation panel 6. Is provided. The numeric keypad 9 is on the left side of the keyboard 8, the copy key 10 and the start key 11 are on the right side.
However, various keys such as a memory key 12, a function key 13, a set key 14, and cursor keys 15, 16 are provided in the center. The copy key 10 is a key for instructing copying of a document and for instructing the start of copying, and the start key 11 is a key for instructing the start of various processing operations. The function key 13 is a key for instructing display of various executable functions, and selection of the function is performed by operating the ten keys 9 and the cursor keys 15 and 16. The set key 14 is a key for instructing confirmation of selection, and the memory key 12 is a key for instructing selection of memory transmission.

Next, a control system of the facsimile machine 1 will be described with reference to FIGS. As shown in FIG. 4, a control unit 100 for controlling the facsimile machine 1
Are a communication line 15 connected to the partner device 16, a control panel 6, a display controller 17 for controlling the display 7, a recording head controller 18 for controlling the recording head 25, the various sensors and switches, a light source 81, LF
Motor 40 and a reading motor 60, respectively. As shown in FIG. 5, the control unit 100 includes a CP.
A microcomputer including a U101, a ROM 102 storing a plurality of control programs for controlling the facsimile machine 1, and a RAM 103 is provided. The R
In the AM 102, a reading buffer 104 for storing binarized image data read by the image reading device 80 and compression-encoded image data (hereinafter, referred to as compressed image data) to be transmitted via the communication line 15 are temporarily stored. Memory areas such as a transmission buffer 105, a reception buffer 106 for temporarily storing compressed image data received via the communication line 15, and a recording buffer 107 for temporarily storing image data obtained by decoding received compressed image data. Is provided.

A bus 10 is connected to the microcomputer.
8, an S / P conversion circuit 109 for converting a serial signal into a parallel signal, a threshold memory 110, a P / S conversion circuit 117 for converting a parallel signal into a serial signal, and a transmission / reception connected to the communication line 15. MODEM114, motors 40 and 6
Drive circuits 115, 116 for 0 are connected.
The control unit 100 further includes a clock signal generation circuit 109 for generating a clock signal of a predetermined high frequency,
A binarizing circuit 112, a counter circuit 113, which binarizes the image signal received from D85 and converts it into binary image data;
Etc. are provided. In FIG. 5, circuits and devices not directly related to the present invention are omitted.

The binarization circuit 112 converts the image signal read by the CCD 85 and converted into a digital signal into binarized image data.
5, while the threshold value data is supplied from the threshold value memory 110, and the binarization circuit 112 compares the image signal with the threshold value data to obtain a binary image. Create data. If the level of the image signal is larger than the threshold value, it is set to 0 (white), and if it is smaller, it is set to 1 (black), thereby generating binary image data. When one line (one raster) of binarized image data is created, the image data is converted to an S / P
After being converted into parallel image data by the conversion circuit 109, the image data is stored in the reading buffer 104. Threshold memory 110
Stores threshold data and supplies the threshold data to the binarization circuit 112 based on a command from the CPU 101.

The clock signal output from the clock signal generation circuit 109 is supplied to the CCD 85 and the counter circuit 1.
13 and the S / P conversion circuit 109. The counter circuit 113 includes a first document sensor 61 for detecting a B4 document and a second document sensor 62 for detecting an A4 document.
And are connected. The first document sensor 61 outputs an “H” level detection signal when a B4 document is set in the document receiver 52, and the second document sensor 62 sets an A4 document in the document receiver 52. At this time, an "H" level detection signal is output.

The counter circuit 113 outputs, to the CCD 85, a start pulse SP for instructing the start of reading for each line, and instructs the CPU 101 to store the image data in the reading buffer 104 (hereinafter, referred to as a reading process). A start / end instruction Si for instructing start and end of data storage processing is output. However, this will be described later with reference to FIG. P / S conversion circuit 117
Converts a parallel signal into a serial signal. The received image data processed in parallel by the microcomputer is converted into serial image data and supplied to the recording head controller 18.

The ROM 102 stores image data obtained by reading from the document 51 and binarizing the read data.
04, a compressed data processing control program for converting the image data stored in the reading buffer 104 into compressed image data and storing the compressed image data in the transmission buffer 105, And a decoding process control program for decoding the compressed image data temporarily stored in the receiving buffer 106 to convert it into image data, and storing the decoded image data in the recording buffer 107. Next, the counter circuit 113 will be described with reference to FIG. Counter circuit 113
Is the clock signal CL from the clock signal generation circuit 109.
A counter 120 that counts from “0” to “2499” in response to K, a detection circuit 121 for “0” detection, and “1”
727 ”detection circuit 122,“ 2047 ”detection circuit 123, and“ 2339 ”detection circuit 124
, Relay type contacts 125 and 126, a Si signal generation circuit 127, an SP signal generation circuit 128, and the like.

Each of the detection circuits 121, 122, 123,
Reference numeral 124 is connected to the counter 120 by a bus, and these detection circuits 121, 122, 123,
4 indicates that the count value of the counter 120 is “0”, “172”.
7 "," 2047 ", and" 2339 ", each outputs one pulse signal. The paper width of B4 document is 2
048 pixels (2048 light receiving elements). Each line of the B4 document can be read while the counter 120 counts from “0” to “2047”.
The paper width of the original is 1728 pixels (1728 light receiving elements)
, Each line of the A4 document can be read while the counter 120 counts from “0” to “1727”.

The output terminal of the detection circuit 121 for detecting "0" is connected to the Si signal generation circuit 127 and one input terminal of the contact 126. An output terminal of the detection circuit 122 for “1727” detection is connected to one input terminal of the contact 125. The output terminal of the detection circuit 123 for “2074” detection is connected to the other input terminal of the contact 125. The output terminal of the detection circuit 124 for “2339” detection is
The contact 126 is connected to the other input terminal. The common terminal of the contact 125 is connected to the input terminal of the Si signal generation circuit 127. When the first document sensor 61 detects a B4 document, the contact 125 is switched to the other input terminal side. When the two-document sensor 61 detects an A4 document, it is switched to one of the input terminals.

The common terminal of the contact 126 is connected to the input terminal of the SP signal generating circuit 128.
Is switched to one input terminal when the first document sensor 61 detects a B4 document, and is switched to the other input terminal when the second document sensor 61 detects an A4 document. ing. The Si signal generation circuit 127 includes, for example, a flip-flop,
Rises with a pulse signal from the detection circuit 121;
A start / end command Si falling by a pulse signal from the detection circuit 122 or 123 is supplied to the CPU 101. When reading a B4 document, the start / end command Si
It rises when the count value is “0”, and falls when the count value is “2047”. When reading an A4 document, the start / end command Si rises when the count value is “0” and falls when the count value is “1727”.

The SP signal generating circuit 128 is constituted by a circuit or a pulse generating circuit consisting of a simple conductor for outputting one pulse signal when one pulse signal is inputted.
When reading a B4 document, the start pulse SP is output to the CCD 85 when the count value is “0”. When reading an A4 document, the start pulse SP is output when the count value is “2339”. Pulse SP is CCD8
5 is output.

Next, the operation of the facsimile apparatus thus configured will be described with reference to the time chart of FIG. When the original 51 is set and the original is read and transmitted, when the start pulse SP is input from the counter circuit 113, the CCD 85 starts reading the original, and for each line, in synchronization with the clock signal CLK. The image is sequentially read from the 0th light receiving element to the 2499th light receiving element corresponding to the reading start end side of the document 51, and the image signal is output to the binarization circuit 112.

When the microcomputer 51 reads the original 51, when a start / end command Si supplied from the counter circuit 113 rises for each line, the microcomputer stores the read image data in the read buffer 104. Is started, and when the start / end command Si falls, the data storage process ends. In other words, since the time required to store the individual image data is a very short time, the microcomputer reads only the image data read during the period between the rise and fall of the start / end command Si and stores the read buffer in the read buffer. 104.

Here, when reading the B4 document, at the timing t1 when the count value is "0", the start pulse SP is output and the start / end command Si rises. The data storage processing is started, and the data storage processing ends at timing t3 when the count value is “2047”. The image data stored in the reading buffer 104 by the data storage process during that time is compressed and encoded by the compression encoding process from the timing t3 to the timing t5 when the count value becomes “2499”, and the MODEM 114 is sequentially processed. Will be transmitted and output.

On the other hand, when reading an A4 document, the start pulse SP is shifted at a timing t4 which is earlier than the timing t1 by a count number "160" corresponding to a half of the difference between the paper width of the B4 document and the paper width of the A4 document. Is output, the image reading is started at timing t4. Then, at the timing t1, the start / end command Si
Rises, the data storage process to the read buffer 104 is started at the timing t1, and the data storage process ends at the timing t2 when the count value is “1727”. The image data stored in the read buffer 104 by the data storage process during that time is compression-encoded by the compression-encoding process from the timing t2 to the timing t5, and is sequentially MOD.
It will be transmitted and output via EM114.

As described above, the control unit 100 is provided with the counter circuit 113, and the counter circuit 113 is configured to generate the start pulse SP and the start / end instruction Si. At the time of reading, it is not necessary to count the image data in order to set the reading start timing and the start and end timings of the data storage processing, so that the load on the CPU 101 of the microcomputer is reduced. As a result, the data storage process can be smoothly performed, the reading interruption or the transmission error caused by the memory full of the read buffer 104 can be eliminated, and the compression encoding process has a sufficient period from the timing t2 to the timing t5. Can be applied, the compression encoding process and subsequent transmission control can be performed smoothly, and as a result, the total transmission time can be reduced.

The correspondence between the respective means of the claims and the components in the embodiment will be briefly described. A CCD 85 corresponds to a reading head, a light receiving element corresponds to a reading element, a reading device 80 corresponds to reading means, and a microcomputer corresponds to an image data encoding means (in particular, a compressed data processing unit of ROM 102). Control program), the transmission means corresponds to the microcomputer and the MODEM 114, and the detection means corresponds to the first document sensor 61 and the second document sensor 62.
It is. The counter equivalent to the counting means is a counter 12.
0, the timing setting means correspond to the detection circuits 121 to 124 of the counter circuit 113 and the contacts 125, 1
26, a Si signal generation circuit 127, and an SP signal generation circuit 128.
The detection circuits 121 to 124 correspond to the read start instruction means, and the SP signal generation circuit 128 corresponds to the data processing start / end instruction means, and the Si signal generation circuit 127 corresponds to the data processing start / end instruction means. Furthermore, those corresponding to the first count value, the second count value, the third count value, and the fourth count value respectively are “0”, “1727”, “2047”, “2”.
339 ".

In the above embodiment, for the sake of simplicity, the case where the first light receiving element of the CCD 85 coincides with the edge on the B4 original reading start side has been described as an example. Since a plurality of light receiving elements (the number is denoted by a) protruding outside the edge on the reading start side of the B4 document are provided, the timing t2 is set to t2 = a + 1.
727, the timing t3 may be set to t3 = a + 2047, respectively. In this case, a detection circuit for detecting “a + 1727” is provided in place of the detection circuit 122 for detecting “1727”, and a detection circuit for detecting “a + 2047” is provided in place of the detection circuit 123 for detecting “2047”. become.

[0040]

As described in detail above, in the facsimile apparatus of the present invention , in addition to the reading means, the reading buffer, the image data encoding means, the transmission buffer, and the transmission means, the detection means and the counting means , Timing setting means, the timing setting means instructing the reading means to start reading a document of the first paper width;
It sets and instructs the reading start timing of the document of the second paper width, the timing of starting and ending the storage of the image data in the reading buffer when reading the document of the first paper width, and the timing of reading the document of the second paper width. Since the start and end timings of storing the image data in the read buffer are set and instructed, the start and end timings of storing the image data in the read buffer are determined particularly when reading a document of the second paper width. Therefore, it is not necessary to count the image data, so that the load is reduced, and the reading of the document, the image data processing, and the image data transmission in the facsimile apparatus can be smoothly performed.

In addition , the timing setting means includes a count value detecting means, a reading start command means, and a data processing start / ending command means, and when reading a document of the first sheet width, a predetermined small The reading is started at the timing of one count value, the process of storing the image data in the reading buffer is started, and the image data is started at the timing of the third count value obtained by adding the count number corresponding to the first paper width to the first count value. Ryoshi end of storage processing, also, when reading the second paper width of the document, the first difference between the first width and the second width
At the timing of the fourth count value obtained by subtracting the count number corresponding to / 2 from the maximum count value, reading is started, and at the timing of the first count value, the process of storing image data in the reading buffer is started. The image data storing process ends at the timing of the second count value obtained by adding the count number corresponding to the second paper width to the value.

In this way, by advancing the reading start timing of the original of the second paper width by a count number corresponding to half the difference between the first and second paper widths, the image data of the original of the second paper width can be read. Since the start timing of the storing process in the reading buffer can be made coincident with the starting timing of the storing process of the image data of the original of the first paper width in the reading buffer, the time for compressing the image data of the original of the second paper width is reduced. Can be lengthened, and as a result, the possibility of occurrence of transmission errors due to the memory full of the read buffer is reduced .

[Brief description of the drawings]

FIG. 1 is a perspective view of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the facsimile machine.

FIG. 3 is a plan view of an operation panel of the facsimile machine.

FIG. 4 is a block diagram of a control system of the facsimile machine.

FIG. 5 is a block diagram of a main part of a control unit of the control system.

FIG. 6 is a configuration diagram of a counter circuit of the control unit.

[7] system is a time chart of a variety of signals, and the like based on the control of the control unit.

FIG. 8 is a diagram corresponding to FIG. 7 according to the prior art.

[Explanation of symbols]

 Reference Signs List 1 facsimile device 80 document reading device 85 CCD 100 control unit 101 CPU 102 ROM 103 RAM 104 reading buffer 105 transmission buffer 61 first document sensor 62 second document sensor 113 counter circuit 120 counter 121 "0" detection detection circuit 122 "1727" "Detection circuit for detection 123" 2048 "Detection circuit 124" 2339 "Detection circuit for detection 125, 126 Contact 127 Si signal generation circuit 128 SP signal generation circuit

Claims (1)

(57) [Claims] 1. A reading head comprising a plurality of reading elements arranged in a line in a paper width direction of a document, and for each raster, the plurality of reading elements sequentially synchronize with a clock signal from one end side of the document. Reading means for reading the original
A reading buffer for storing the image data read and digitized by the reading means, an image data encoding means for compressing the image data received from the reading buffer, and a compressed image data received from the image data encoding means. A facsimile apparatus comprising: a transmission buffer for storing the compressed image data received from the transmission buffer; and a transmission unit for transmitting and outputting the compressed image data via the communication line. 2
Detecting means for detecting whether the document is a sheet of paper width; counting means for counting the clock signal from "0" to "total number of a plurality of reading elements-1" for each of the rasters; output of the detecting means and the counting means receiving, with respect to read-up means, first width, along with commanding by the second paper width of the document set the <br/> reading start timing when reading respectively for the read buffer, the first paper width, the second width Manuscript of the husband
Timing setting means for setting and instructing the start and end timings of the image data storage processing at the time of each reading , wherein the timing setting means sets the count value of the counting means to a predetermined small first value.
The first signal is output when the count value is
The second count value obtained by adding the count number corresponding to two paper widths
The second signal is output at the time of
At the time of the 3rd count value which added the corresponding count number,
3 signals are output, and the difference is 1/2 of the difference between the first and second paper widths.
The fourth number obtained by subtracting the corresponding count number from the maximum count value
Count value detecting means for outputting a fourth signal when the count value is a count value
When receives an output of said detecting means and the count value detecting means, reading
When reading a document of the first paper width, the first
No. outputs a read start command signal to the input, the second paper width Hara
When reading a manuscript, a read start command signal is input when the fourth signal is input
Receiving the output of the reading start command means for outputting
When scanning a document with a paper width, read
And starts a process of storing image data in the
At the time of input, the storage processing of the image data is terminated, and the second paper
When scanning originals with a width, read buffer when inputting the first signal.
To start the process of storing the image data in the
Data processing that terminates the storage processing of the image data when
And a facsimile start / end command means .