JPH0771188B2 - Equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a facsimile apparatus.

[Prior Art] Since a laser beam printer can perform printing at a very high speed, it is conceivable to use the laser beam printer in a facsimile machine by taking advantage of this feature.

In this case, there is a problem that the received image cannot be recorded at all and the image is chipped at the lateral edge. That is, the A4 size original has a width of 210 mm as shown in FIG. 10 (1), while the effective recording area of the laser beam printer is in the main scanning direction as shown in FIG. 10 (2). Only 198 mm. So, for example, with a width of 4mm on the left and 8mm on the right,
An unrecorded area is created. This non-recorded area is generated because the separation belt is used in the laser beam printer.

[Object of the Invention] When the standard size received image information is recorded on a recording paper of the same size as the received image information, the image information corresponding to the non-recording area set at the edge of the recording paper is surely obtained. Therefore, it is an object of the present invention to provide a facsimile apparatus which can surely prevent a part of image information that has been recorded and that is missing, and output a copy image that is easy to see when copying a document.

Embodiment of the Invention FIG. 1 is a block diagram showing an embodiment of the present invention.

The above embodiment is based on the image reading unit 100 as an image reading system.
And a laser printer 200 as a recording system, and a controller C for controlling the image reading unit 100 and the laser printer 200.
Have and.

FIG. 2 is a perspective view showing the image reading unit 100.

A predetermined document is inserted from the document insertion section 110, image information is converted into an electric signal by an image reading means provided inside, and the document is ejected from the paper ejection tray 120. Also,
The image reading unit 100 is provided with an operation panel 130, and a controller C for controlling the image reading unit 100 and the laser printer 200 is built therein.

FIG. 3 is a diagram showing the operation panel.

The operation panel 130 is for executing standard mode, fine mode selection, mini-fax, halftone designation, dial operation of the partner station, and other functions.

FIG. 4 is a vertical sectional view showing an example of the laser printer 200.

The laser printer 200 includes an exposure device 210 and a developing unit 22.
0, a paper feed cassette 230, a transfer unit 240, a fixing unit 250,
And a stacker unit 260. The exposure apparatus 210 includes a laser 211
And a scanner including a polygon mirror 212.

The developing unit 220 has a photosensitive drum 221 and a cleaner 222, and visualizes the latent image formed on the drum 221 by the reflection mirror 213.

The paper in the paper feed cassette 230 is sent by the paper feed roller 231 and the transport roller 232, and is temporarily stopped by the registration shutter 233. This allows laser irradiation and drum
The rotation of 221 is synchronized with the sheet feeding, and then the sheet is fed to the drum 221 by the feeding roller 234. Then, the toner image is transferred onto the paper at the transfer unit 240, and the paper is separated from the drum 221 by the separation belt 245. Then, the toner image is fixed in the fixing unit 250.

A series of operation timing control such as the above-described paper conveyance, character formation, development, transfer, and fixing is performed by the image memory 10 described later.
Is performed via a laser printer controller 35, which will be described later, based on the data stored in.

In addition, a toner concentration sensor 271 that detects the toner concentration
A temperature sensor 272 that detects the temperature of the fixing unit 250, an LED 273 that detects the presence of paper, and a light receiving element 274 are provided.

Returning to FIG. 1, the controller C will be described.

The controller C mainly comprises a transmission system for transmitting the read data from the image reading unit 110 to the partner station, a transmission system for transmitting the data received from the partner station to the laser printer 200, and an image memory for storing predetermined image data. 10 and controller C
It is composed of a CPU 50 that controls the whole of.

The transmission system includes a reader interface 21, an intermediate coder 22 that compresses and encodes read data into an intermediate code, an image memory 10 that stores the intermediate code, and a pixel density that reduces the pixel density according to the function of the partner station. Conversion circuit
Selector to select 60 and MH coder 24 or MR code 25
23, a modem 30 that modulates a transmission signal, and an NCU 31 that performs line control.

The above signal system includes an NCU 31 and a modem 30 that demodulates a received signal.
An MH intermediate decoder 41, an MR intermediate decoder 42, a multiplexer 43, an image memory 10 for storing the intermediate code via the multiplexer 43, a pixel density conversion means 61 having dot overlapping means, and a video from the intermediate code. It is composed of a decoder 44 for converting into a signal and a laser printer controller 35 for controlling the laser printer 200.

The image memory management circuit 11 determines the remaining memory capacity of the image memory 10,
It manages the entire writing and reading.

The CPU 50 controls the entire controller C, its control program is stored in the ROM 51, and each data necessary for executing the program is stored in the RAM 52.

The image memory 10 sends stored data at the transmission speed of the line 400 at the time of transmission, and stores one page of data at the time of reception and then sends the stored data to the decoder 44. When the image memory 10 is used as a retention memory, the information is stored until the multi-copy ends, and when the image memory 10 is used as a broadcast transmission memory, the broadcast transmission ends. Until that time, the information is stored. Reference numeral 300 is a telephone.

Next, the operation of the above embodiment will be described.

FIG. 5 is a flow chart showing the operation of one embodiment of the present invention.

First, the same-size copy mode is set as the initial setting, and the reception 11/12 mode is set (S11, S12).
The reception 11/12 mode is a mode in which the vertical length and the horizontal length of the transmission original are forcibly reduced to 11/12 when received. That is, the original width 210 m shown in Fig. 10 (1)
In this mode, m is reduced to the effective recording area width of the laser beam printer, which is 198 mm (shown in (2) of the figure). Here, although 198/210 and 11/12 are not equal to each other, 11/12, which is an easily understandable number, is used for convenience. Further, in this case, in order to make the aspect ratio the same, the vertical direction is also reduced at the same ratio.

Next, it is determined whether to execute the copy mode or receive (S13). If not, proceed to the key processing routine shown in FIG. 6 (S40). When the power is turned on, neither the copy nor the reception is performed, so that the key processing routine is automatically executed.

In the key processing routine, it is determined whether or not the copy 11/12 key is pressed (S41). The copy 11/12 key is a key for reducing the original image to 11/12 and copying it. Copy 11/12 If the key is pressed, copy 1
The 1/12 flag is set (S42), and the copy 11/12 LED that indicates that the copy 11/12 mode is used is lit (S4
3) Wait.

If you have not pressed copy 11/12, receive 11/12
Determine if the switch has been reset (S4
Four). The reception 11/12 switch is installed inside the facsimile apparatus and resets the reception 11/12 mode by software, and is called a soft switch. If the reception 11/12 switch is reset, the reception 11/12 flag is reset (S45) and the system stands by.
If the receive 11/12 switch is not reset,
After performing other key processing (S46), the process stands by.

On the other hand, in S13 shown in FIG. 5, if it is a copy or a reception, it is judged whether it is a copy or not (S14), and if it is not a copy, it is a reception, and in this case, a reception flag is set (S15). . Then, the receiving operation is started (S1
6).

Then, it is judged whether or not the reception 11/12 mode is set (S17), and the reception
In the 11/12 mode (when not reset by the soft switch), the waiting time T is set to t2. The waiting time T is after the horizontal sync signal is generated,
This is the time until the image signal is sent to the semiconductor laser 211.

The longer the waiting time T, the more the position of the recorded image shifts to the right with respect to the printing paper. That is, the longer the waiting time T, the greater the amount by which the center of the image shifts to the right with respect to the printing paper. Further, in the case of the same size copy, the waiting time is set to t1 and there is a relation of t1 <t2. An example of this is shown in FIG.

Further, FIG. 8 is a circuit diagram of a main part for shifting the image center with respect to the printing paper.

A beam detector 280 is provided at the end of the drum 221, and when the beam detector 280 detects a beam, a horizontal synchronizing signal is generated. Output port 281 is from CPU50
The information of t1 (or t2) used as the waiting time T is received and this information is held.

The program counter 282 starts the clock counter of the clock generator 283 after the horizontal synchronizing signal is generated, counts the clock corresponding to the time of t1 (or t2), and then outputs the borrow signal. Gate 284
When it receives the borrow signal, the gate opens and the image signal is sent to the semiconductor laser 211.

As a result, the image is printed after the time t1 (or t2) designated by the CPU 50 after the horizontal synchronizing signal is generated, so that the position of the image center on the printing paper can be freely adjusted. An example of adjusting the image center position in this way is shown in FIG. FIG. 9 (1) shows a state with a center shift, and FIG. 9 (2) shows a state without the center shift. Note that FIG. 9 shows an example in which only the horizontal direction is reduced.

Returning to the flowchart of FIG. 5, the waiting time T is set to t2 in S18.
After setting to, the main scanning is thinned (S19).
In this case, since the size is reduced to 11/12, one dot signal is thinned out every 12 dots. It also thins out sub-operations (S20). In this case, the signal of one line is thinned out every 12 lines.

Then, the printing operation is performed according to the thinned-out signal (S21).

After the printing is completed, it is determined whether the next operation is copying (S22). If it is a copy, the copy 11/12 mode is reset (S23), and if it is not a copy, the reception 11/12 mode is reset (S24). That is, the 11/12 mode is canceled for each communication or for each copy to return to the normal size mode.

Alternatively, S23 or S24 may be omitted. That is, after pressing the copy 11/12 key, unless you return the key, you can always reduce it by 11/12 when copying.
Further, unless the 11/12 mode is reset by the soft switch, the 11/12 mode may be executed without fail when receiving.

On the other hand, when it is determined in S31 that the copy 11/12 mode is not set (when the copy 11/12 mode key is not pressed), the waiting time T is set to t1 (S32) and the printing operation is performed. (S21). In this case, the normal size mode is set. As described above, when the reduction mode of 11/12 is selected, it is possible to compensate for the missing width of the image for the separation belt and to see all the transmitted or copied images. Further, the 11/12 mode is prioritized in the reception mode, and the normal size mode is prioritized in the copy mode, which is extremely convenient.

In the above embodiment, the 11/12 mode reduces the image signal to 11/12 in the vertical direction and the horizontal direction, but it may be reduced at a rate other than this ratio. That is,
It suffices to adopt an effective recording mode in which the image is reduced to fit within the effective recording area. This effective recording mode can be similarly adopted in the copy mode as well as in the reception.

The above embodiment can be applied to a facsimile machine using a printer other than the laser beam printer.

[Effects of the Invention] According to the present invention, when the received image information of the standard size is recorded on the recording paper of the same size, the image information corresponding to the non-recording area set at the edge of the recording paper is It is surely recorded, and therefore it is possible to reliably prevent a part of the image information from being lost. On the other hand, when copying the original,
Since the recording is performed at the same size without performing the reduction, it is possible to output a copy image that is easy to see.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a perspective view showing an example of the image reading unit. FIG. 3 is a diagram showing an example of the operation panel. FIG. 4 is a vertical sectional view showing an example of a laser beam printer. FIG. 5 is a flow chart showing the operation of the above embodiment. FIG. 6 is a flowchart showing the key processing routine. FIG. 7 is a diagram showing the timing of shifting the image center in the above embodiment. FIG. 8 is a block diagram for obtaining the timing shown in FIG. FIG. 9 is a diagram showing an example in which the center of the image is shifted. FIG. 10 is a diagram showing an example of printing without reduction. C: controller, 35: LBP controller, 50: CPU, 100: image reading unit, 200: laser beam printer.

Claims (1)

[Claims] 1. Receiving means for receiving image information; Reading means for reading image information of a document image; Recordable on the recording paper except for a non-recording area in which image information set at an end portion of the recording paper is not recorded Recording means for recording the image information received by the receiving means and the image information read by the reading means in the area; and image information of a predetermined standard size received by the receiving means,
Image information reducing means for reducing the image information of the predetermined standard size received by the receiving means so that it is recorded in the recordable area of the recording paper of the same size as the predetermined standard size; and the image received by the receiving means. When recording the information, the recording means is controlled so that the received image information reduced by the image information reducing means is recorded in the recordable area,
On the other hand, when copying an original image, a recording for controlling the recording means so that the image information read by the reading means is recorded in the recordable area at the same size without being reduced by the image reducing means. A facsimile apparatus comprising: control means;