JPH084301B2 - Copying device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying apparatus having a display unit for displaying the progress of image formation when a read image of a document is formed by a recording unit.

[Prior Art] Conventionally, when displaying the progress of image processing in an image processing apparatus, the progress of image reading processing has been displayed. (JP-A-58-202665) [Problems to be Solved by the Invention] As described above, when the processing status display means for displaying the process of the reading processing is used as the progress status means of the image processing,
When so-called enlargement copying is performed in which the image is enlarged and magnified, the reading area and the recording area are not the same, so even if the original reading is not completed for one page, all the recording operations for one page on the recording paper are completed. It will end.

For example, when the image of 50% of the original is doubled and copied onto the recording medium, only half of the original is read even after the copying on the recording medium is completed, and therefore only half of the reading process is displayed.

That is, when the magnification is changed or when the recording medium size is different from the document size, the timing at which the recording operation ends with respect to the end of the reading operation greatly differs. Therefore, in order to relatively display the progress of the copying operation of the copying machine by the reading processing status display means, the user needs to calculate and set the reading area according to the recording medium size and the enlargement ratio, which is convenient for the user. It wasn't good.

[Means for Solving the Problem] The present invention provides an image reading unit that reads an image of an original to generate an image signal, and the image reading unit that changes the size of the image obtained by the image reading unit. Processing means for performing scaling processing on the image signal, moving the recording head in which a plurality of printing elements are arranged in the sub-scanning direction in combination in the main scanning direction and the sub-scanning direction, and moving the image signal subjected to the scaling processing by the processing means. Image forming means for forming a corresponding image, size data generating means for generating data indicating the size of the recording medium imaged by the image forming means, size of the recording medium generated by the size data generating means,
It is characterized by further comprising display means for displaying the progress of image formation of the image forming means with a relative value determined by the amount of movement of the recording head in the sub-scanning direction on the recording medium.

<Embodiment> (Outline of device mechanism) FIG. 1 is a perspective view of a digital color image forming apparatus according to an embodiment of the present invention, and FIG. 2 is a configuration diagram schematically showing FIG. The configuration of the present invention will be described with reference to FIGS. 1 and 2. The document table glass 1 has a document 20 placed on a flat surface. The original surface of the original 20 faces the surface of the original glass 1, and the original 20 is pressed by the pressure plate 1a. The reading head (hereinafter referred to as a reader) 3 for reading the manuscript 20 is a reading sensor (hereinafter referred to as CCD, which is composed of a CCD array including a plurality of reading elements in three rows of red, green, and blue (hereinafter, R, G, B) colors. A unit 17 and an exposure lamp 19 are mounted, and the main scanning motor 6a is connected to and driven by the main scanning wire 8a. The sub-scanning table 5a supports one end of the main scanning wire 8a and is driven by being coupled to the sub-scanning motor 9a by the sub-scanning wire 10a.

A recording paper 21 is placed on the recording table 2 and a recording head (hereinafter, printer) 4 records a copied image. Pudding 4 is yellow, magenta, cyan, black (hereinafter Y, M, C, BK)
A recording element (hereinafter referred to as BJ head unit) 18 composed of four-color multi-ink jet heads (hereinafter, BJ head is used because a bubble jet head is used in the present invention) is mounted, and is connected to main scanning motor 6b by main scanning wire 8b. Is driven. The sub-scanning table 5b supports one end of the main scanning wire 8b, and is coupled to and driven by the sub-scanning motor 9b by the sub-scanning wire 10b.

When obtaining a copied image in the above-mentioned configuration, the reader 3 is driven by the main scanning motor 6a via the main scanning wire 8a and reciprocates in the main scanning direction. At this time, the exposure lamp 19 is turned on and the reading sensor 17 reads the original 20 from below and outputs image information as an electric signal. Based on this electric signal, the printer 4 is driven by the main scanning motor 6b via the main scanning wire 8b, and prints on the recording paper 21 while reciprocating. At this time, the main scanning directions of the reading head 3 and the recording head 4 are set opposite to each other in this embodiment. After one copy process in the main scanning direction is completed and the exposure lamp 19 is turned off, the reader 3 and the printer 4 move in the direction perpendicular to the main scanning, that is, in the sub-scanning direction to the position for the next main scanning. At this time, the reader 3 and the sub-scanning base 5a supporting the main scanning wire 8a together with the sub-scanning wire
It is driven by the sub-scanning motor 9a via 10a to move to a predetermined position and stop. Further, the printer 4 includes the sub-scanning table 5b supporting the main scanning wire 8b and the sub-scanning wire 10b.
It is driven by the sub-scanning motor 9b via the and moves to a predetermined position and stops.

(Device control operation ... Previous operation) FIG. 3 is a block diagram of the control circuit of the above-described embodiment, and
Fig. 4 shows the timing chart of the entire sequence,
Figure shows the program flow chart. 4, 5 and 6
First, the outline of the operation of the apparatus will be described with reference to the drawings. The timing chart and step number on the flow chart are the same.

Sequence cotton roller 23, image controller 24
Both have a microcomputer unit in the center, and the sequence control of the apparatus and the timing of image data formation are programmed respectively, and the two microcomputers communicate data via a line 39. The sequence after the power is turned on will be described. The sequence controller 23 follows the flow chart of FIG.
In step 2, the initial setting of the copying machine is performed, and then in step 2, the home position of the main scanning and sub scanning of the reader and printer is restored. Then, in step 3, the ink jet head recovery operation is performed. The head recovery operation is performed by using a porous member or the like in order to forcibly remove the sticking of the ink at the tip of the ink jet nozzle after the apparatus has been idle for a long time, and further to remove the liquid pool near the nozzle tip after the ink ejection operation. In this operation, a material having good water absorption is pressed against the tip of the head or is slid in contact therewith. In the sequence, the printer main scanning motor 6b is rotated in the backward direction and stopped by the detection output of the recovery system position sensor 22. Next, turn on the drive mechanism such as the solenoid that presses the porous member against the head,
Press on the tip of the nozzle for a predetermined time. After completion, the printer main scanning motor 7b is rotated in the forward direction and stopped by the detection output of the printer main scanning home position sensor 12.

Next, in step 4, the head is capped for the purpose of preventing a change in the viscosity of the ink at the nozzle tip at the time of the suspension of the copying operation of the apparatus. This is achieved by turning on a drive mechanism such as a solenoid for capping at the home position of the printer. Next, in step 5, the operator's input from the operation unit 25 is waited for, the input data is decoded, and the copy mode is set.
If it is not a copy start command, the process returns to step 5, and if it is a copy start, the process proceeds to step 7 to release the cap drive of the head to start the copy operation. Next, in step 8, the head head is ejected before the copying operation. The idle discharge process is a process that is performed to ensure stable recording. Copy pause is performed to prevent uneven discharge at the start of image formation due to changes in the viscosity of the ink remaining in the ink jet nozzles. This is an operation of ejecting and removing the ink in the ink jet nozzle according to programmed conditions such as time, apparatus temperature (temperature sensor not shown), and copy duration. Next, in step 9, the document exposure lamp 19 is turned on and the shading correction process is performed. The shading correction is to read the standard white plate which is the reference of the white data before scanning the original and sample the correction data for the aberration of the optical system lens and the sensitivity variation of each bit of the CCD sensor.

Next, in step 10, it is judged whether or not it is immediately after the start of copying, and immediately after the start, that is, before the start of the first main scan, the operation proceeds to step 11, and if it is the second and subsequent times, the step is started.
Proceed to 12. In step 11, a head recovery operation is performed in anticipation of a long rest of the device. The recovery operation in this case is the same as the operation described in step 3. Next, at step 12, main scanning is started. (Refer to FIG. 6 for each signal.) (Device control operation-copying) In the main scanning, first, the motor driver circuit 26a of the reader through the line 40 receives speed data according to the magnification and rotation start signal in the reader forward direction. To turn on the reader main scanning motor 6a. Next, after taking a delay time for synchronizing the reader and the printer according to the scaling ratio, a rotation start signal in the printer forward direction is sent to the motor driver circuit 26b of the printer via the line 41 to turn on the printer main scanning motor 6b.
To do. The rotational speeds of the main scanning motors 6a and 6b of the reader and printer are the rotary encoders 7a and 7 for detecting the rotational speed, respectively.
A pulse (FG signal) from b (hereinafter referred to as an encoder) is compared with a rotation speed reference pulse by the motor driver circuits 26a and 26b, and is locked to a predetermined rotation speed by PLL control to become a constant speed rotation speed. Also, each encoder pulse is sent to lines 42, 4
It is sent to the video data synchronizing signal generating circuit 28 and the head data synchronizing signal generating circuit 38 via 3.

(Processing on leader side) Next, at step 13, a copying operation is performed. Description will be made below with reference to FIGS. 7-e and 7-b. As shown in FIG. 3, the video data synchronizing signal generation circuit 28 is position information in the reader main scanning direction in synchronization with the encoder pulse of the reader main scanning motor 6a, and indicates the effective range of the video data of resolution l in the sub scanning direction. The video line enable signal shown (hereinafter VLE) is produced as shown in FIGS. 6-a, 6-b. Furthermore, the video data start signal input from the CCD drive circuit 29 indicates a data effective width of all pixels of the CCD and outputs a video data enable signal (VDE) synchronized with the encoder pulse. At the same time, the CCD driver circuit 29
A CCD start signal for instructing image reading to CCDs corresponding to three colors of blue (B), green (G), and let (R) on the CD unit 17 is supplied through a line 57 in synchronization with an encoder pulse. After the gain of the analog video signals for the three colors read in the CCD unit 17 is adjusted so that the sensor sensitivity of each color is equal,
It is output through line 44 as a digital value with a depth of 8 bits. At this time, a video data start signal indicating the effective data range of all CCD pixels is also output from the CCD drive circuit 29. Digital video data of B, G, and R colors (hereinafter referred to as video data) is input to the reader synchronization circuit 30.

The video synchronizing signal generating circuit 58 will be described below. The signal PHREGP line 45, VLE signal from the leader registration position sensor 15 is counted by the video synchronizing signal generating circuit 28 from the line 46 and the image controller 24 according to the copy magnification. The VLE signal values are input via line 47 respectively, and the VLE signal is counted as the time delay until the leading edge of the original, that is, the reading start position is reached after the CCD unit has passed the reader registration position for image alignment. By. Further, a signal video enable signal (hereinafter referred to as VE signal) indicating the reading width in the main scanning direction according to the copy size is output and input to the reader synchronization circuit 30 via the line 48.

In the reader synchronization circuit 30, as shown in FIG. 6-c, B, G,
RFor scanning the same part of the original of the CCD for each color,
Positioning operation in the main scanning direction is performed. That is, if the intervals between CCDs corresponding to B, G, and R colors are L1, respectively, the image at the position S1 of the document is input to the CCD corresponding to each color when the main scanning speed is V, and the time is L1 / V respectively. I have a gap. Therefore, the video data from the CCDs of B and G are temporarily stored in the buffer memory in the reader synchronizing circuit 30 until the image of the S1 point is input to the CCD of the R that is input last in time. The B, G, and R three-color video data are collected and output from the reader synchronization circuit 30. In addition, a video data area (VDA) that shows the state in which B, G, and R three-color video data are complete after the VE signal is input, that is, the video data of the original is input.
Output a signal. The vertical direction in FIG. 6-c is the time axis, not the sub-scanning direction.

The video data color-matched by the reader synchronization circuit is then input to the scaling buffer memory 31 and scaled.

(Scaling Process) Here, the scaling process will be described with reference to FIG. The scaling processing in the main scanning direction is performed by changing the scanning speed V1 of the printer to V1 / n while keeping the scanning speed V1 of the printer constant (n is a scaling ratio). This is because the upper limit of the drive frequency of the ink jet head, which is the image forming means of the printer, is lower than the upper limit of the drive frequency of the CCD. Therefore, at the time of copying at the same size, the maximum ink jet drive frequency is used at the same size in order to increase the copying speed. At this time, the scaling mode signal is generated from the image controller 24 through the line 49 in FIG. Sent to the circuit 28, the VLE signal is the same size,
The frequency division ratio of the motor encoder pulse of the reader is set so that the frequency becomes the same frequency when changing the magnification (Fig. 7-a, 7-
(Fig. b).

That is, as shown in FIG. 7-a, the motor encoder pulse φ
M is divided into 1/6 as shown in φM1 when it is 1 ×, divided into 1/12 as shown in φM1 / 2 when it is reduced to 1/2, and φM2 when it is doubled. As shown in, divide by 1/3, and when tripled, divide by 1/2. When the frequency of the motor encode pulse φM is 1/2 times the same frequency, it is doubled, when it is doubled it is 1/2, and when it is tripled it is 1/3, so φM1, φM2, φM3 Therefore, the frequency of φM1 / 2 is actually the same frequency.

FIG. 7-b shows the reading position on the document, and shows the moving distance of the CCD at a constant time t (= VLE section). When it is reduced to 1/2, it moves twice as much as it is, and when it is enlarged twice, it moves 1/2 as much as it is.

In addition, the scaling processing in the sub-scanning direction is performed by the video clock φ (CL
RGB sent from the reader synchronization circuit 30 in synchronization with K8)
This is done by controlling the address step of the variable scale buffer memory 31 when storing each pixel of the video signal in the variable scale buffer memory 31 (FIG. 7-c).

This is achieved by increasing or decreasing the number of clock pulses of the address counter when the scaling mode signal is input from the image controller 24 to the memory control circuit 32 through the line 50 and written in the scaling buffer memory 31 according to the scaling ratio ( (Fig. 7-d). As a result, when the memory 59b in the write mode (W) of the double buffer memory 59a, b in the variable magnification buffer memory 31 is enlarged by n times, the data of the same pixel is written in n addresses, and at the time of 1 / n reduction. One pixel out of n pixels will be written to one address, and when it enters the read mode, the video clock φ-CL
When the address is incremented by K8, interpolation and thinning of pixel data are achieved. Although the motor speed on the reading side is changed in this embodiment, the motor speed on the recording side may be changed.

Here, another function of the scaling buffer memory 31 will be described with reference to FIG. 7-d. Magnification buffer memory 31
The double buffer memories 59a, b in the inside switch the address step clock between writing and reading.
This is because the VLE signal is generated from the encoder pulse of the reader main scanning motor 6a, so if rotation irregularity of the motor occurs, accuracy as position information between each main scanning over the entire sub-scan is obtained, but frequency unevenness occurs. . In order to synchronize with the VLE signal and to prevent the CCD accumulation time from fluctuating, the image reading cycle by the CCD is set to 1/2 or less of the minimum value of the VLE signal cycle, and the shift clock φ-CLK4 of CCD17
Is the video clock, and the frequency is more than twice the frequency of φ-CLK8. Therefore, the address clock at the time of copy and writing of double buffer memories 59a and 59b is the shift clock φ-CLK of CCD17.
4 is used, and at the time of reading, the video clock φ-CLK8 which is a synchronizing signal of pixel data in the reader and printer is used.

As described above, the scaling buffer memory 31, the memory control circuit 3
In the scaling mode, in addition to the pixel data interpolation and thinning-out operation in the magnification changing mode, the CCD accumulation time is fixed and the pixel reading operation is performed in synchronization with the encoder pulse of the reader main scanning motor 6a.

(Image signal processing) B, which has been subjected to the above-described scaling processing in the scaling buffer memory 31,
The G, R three-color video data is then sent to the image processing circuit 33 and subjected to the processing shown in the block of FIG. First R,
The video data of G and B three colors can be corrected by the shading correction unit 60 based on the data of the standard white plate read in step 9. In this embodiment, since the image light is read within the range where the CCD exposure amount E and the light output voltage V are kept linear, the correction of the following equation is added.

However, Vs; output after shading correction V; output from CCD Vmax; output when reading the white board Vsmax; set output The video data with the shading correction added is input to the next logarithmic conversion unit 61 and converted from the light intensity value. At the same time as the conversion to the ink density value, the complementary color conversion is performed, and the B, G, and R video data are converted to y, m, and c density data, respectively.
The conversion formula is expressed by the following formula, where D is ink density, Ep is the amount of light reflected from the standard white plate, and E is the amount of image light.

The converted three-color density data is then input to the black extraction / UCR unit 62 and the edge extraction unit 63. Black extraction is to calculate the amount of black ink hit from the density data of Y, M, and C colors. This is because if you try to express black (hereinafter Bk) with Y, M, and C color inks, it will be difficult to express perfect black, and the amount of ink shot will increase, causing "bleeding" and excessive paper on the copy paper. This is to prevent the expansion of. UCR (removal of undercolor) is a method of reducing the ink amount of each color of Y, M, and C in relation to the black ink amount when black ink is used by black extraction. In this embodiment, the following equation is calculated. .

Bk = {min (Y, M, C) -a1} a2 Yout = (Y-a3Bk) a4 Mout = (M-a5Bk) a6 Cour = (C-a7Bk) a8 where a1 to a8 are arbitrary coefficient edge extraction Is to strengthen the contour of the image by adding the edge amount extracted by extracting the edges and lines of the image to the original image data with a specific relationship. In this embodiment, edges are extracted by using a 5 × 5 convolution mask in the main scanning and sub scanning directions. In order to remove the noise component from the extracted edge amount, the threshold value is arbitrarily selected so that the low-level detection value is not added to the image data. The edge extraction unit outputs a video data valid signal (hereinafter referred to as VDV signal) indicating a region where edge extraction by the Laplacian mask is possible in the video enabled state. This means that when the 5 × 5 Laplacian mask is used, from the VLE signal after the 3rd line after the VE signal becomes active.
Indicates that the VDV signal is output.

The density data YMC after UCR is input to the masking unit 64 and masked. For masking, the following calculation is performed by a matrix calculation process for correcting turbidity when ink is superposed due to unnecessary absorption of ink.

However, a ₁₁ ~a ₃₃ is the number of any system.

Next, the masked Y, M, C three colors and the Bk density data are input to the output gradation correction circuit 65, and the gradation in the pseudo halftone expression by the dither method used in the binarization circuit in the subsequent stage is displayed. You can add a correction to make it flat. The correction formula is shown below.

Yout = {a ₅₁ (Y−a ₅₂ )} a ₅₃ Mout = {a ₅₄ (M−a ₅₅ )} a ₅₆ Cout = {a ₅₇ (C−a ₅₈ )} a ₅₉ where a _{51 to} a ₅₉ are optional Is the coefficient of.

Next, the output tone-corrected density data, Y, M, C, Bk and the edge amount ED are input to the binarizing unit 66 and binarized.

In the binarization process, in this embodiment, the systematic dither method is used to first binarize the image data uniformly, and then the pixel of interest is corrected by the edge data ED. In other words,
When correction is performed based on the truth table shown in FIG. 6B, the image in which blurring has occurred in the edge portion due to the systematic dither method becomes a pseudo halftone expression image in which the contour is strengthened.

The video signal processed by the image processing circuit 33 as described above and converted into Y, M, C, Bk and four color binary signals (hereinafter referred to as density data) for ink jet head is stored in the reader / printer synchronous memory 34. Input through line 51 to.

(Processing on Printer Side) Here, the head data synchronization signal generation circuit 37 will be described before the operation of the reader / printer synchronization memory 34 is described. In the head data synchronizing signal generating circuit 37, the 6th-d,
As shown in FIG. 6-e, the nozzle line enable signal (hereinafter referred to as “nozzle line enable signal”, which is synchronized with the encoder pulse of the printer main scanning motor 6b, is position information in the main scanning direction of the reader and indicates the effective range of head data of resolution 1 in the sub scanning direction NLE) is made. The NLE signal is sent to the head sync signal generation circuit 38 via the line 52. A signal from the printer register position sensor 16 is input to the head synchronizing signal generation circuit 38 through a line 53, and the NLE signal is counted as a time delay until the copy position is reached after the BJ head unit 18 has passed through the registration position. As a result, a signal indicating the copy width in the main scanning direction according to the copy paper size, that is, a nozzle enable signal (hereinafter NE) for each color is output to the reader / printer synchronous memory 34 via the line 54.

The reader / printer synchronization memory 34 buffers the speed difference between the reader main scanning motor 6a and the printer main scanning motor 6b, and outputs the density data input from the reader unit in synchronization with the printer speed, that is, in synchronization with the NLE signal. To do. When the VDV signal is input from the image processing circuit 33, that is, only the effective portion of the video data is written in sequence in synchronization with VLE, and when the NE signal is input from the head synchronizing signal generation circuit 38, that is, the ink jet head in the copy area. When there is, the density data written in the memory is sequentially read as head data in synchronization with NLE. The data of each recording head read from the reader / printer synchronization memory 34 is output to the printer synchronization circuit 35 through the line 55.

In the printer synchronizing circuit 35, the head data of four colors Y, M, C, and Bk obtained by color separation of the image of the original S'one point are simultaneously printed in line 55.
The head data of the four colors are input by way of the position data of the heads corresponding to the respective colors by the distance in the main scanning direction.

That is, as shown in FIG. 6-f, if the distance between the ink jet heads corresponding to Y, M, C, and Bk colors is L ₂ , then Y, M, and
In order for the images of C, Bk inks to be printed by overlapping them at the same point in the main scanning direction of the ink jet head, the main scanning speed is V and each color head has a time delay of L ₂ / V. Just hit it. That is, the color head data of M, C, Bk is temporarily stored in the buffer memory in the printer synchronizing circuit 35 until the position of the Y head where the image is first printed in the forward direction of the main scanning, and then sequentially output from the printer synchronizing circuit 35. Then, it is achieved by inputting to the printer head drive circuit 36. The sixth
In FIG. 7f, the vertical direction is the time axis, not the sub-scanning direction.

Further, the NE signal is input to the printer synchronization circuit 35,
The NE signal is a signal indicating the copy area of the Y head.
A head drive enable signal (hereinafter referred to as an HDE signal) corresponding to each color indicating a head discharge section of each color is output from the signal and is input to the printer head drive circuit 36 through a line 56. In the printer head drive circuit 36, NE signal, NLE
A drive signal for the ink jet head in the printer head unit 18 and head data corresponding to each color are output to the printer head unit 18 from the signal, the HDE signal, and the clock φ.

The image of the original is read by the reader 3 according to the above flow and is formed by the printer 4. When the image controller detects the end of the VE signal and the NE signal generated from the reader 3 and the printer 4, it determines the end of the main scanning one-line copy (step 14).
Move on to.

(Post-processing) In step 15, the sequence cotton roller 23 first turns off the exposure lamp 19 and inputs a motor OFF signal to the motor driver circuits 26a and 26b of the reader and printer, respectively, and then, reverse speed data and rotation start A signal is sent to turn on the respective motors 6a and 6b to start the backward movement, and stop at the respective main scanning home positions 11 and 12. At the same time, in step 16, the reader sub-scanning stepping motor 9a (hereinafter referred to as the leader sub-scanning motor) is fed a predetermined number of pulses in accordance with the copy magnification in the sub-scanning forward direction rotation mode to feed the reader for one sub-scanning. Similarly, the printer sub-scan stepping motor 9b (hereinafter referred to as printer sub-scan motor) also feeds one sub-scan. Next, in step 17, the sub-scanning counter is incremented, and in step 18, it is judged whether or not the sub-scanning counter is advanced by the copy width in the sub-scanning direction. If the count is not advanced, the process is returned to step 8 and main scanning is performed. Is repeated until the sub-scanning counter is up. When the sub-scanning counter is up, the process moves to step 2, and a predetermined pulse number is sent to each sub-scanning motor of the reader printer in the sub-scanning reverse rotation mode to restore the home position. Then, in step 3, the head recovery operation of cleaning the ink jet nozzle head after the copying is completed is performed, and in step 4, the head is capped and the next copy command is waited in step 5. The above is the outline of the operation of the apparatus.

<Display of Copy Status Monitor> The operation of the copy monitor LED will be described with reference to FIGS. 9-a, b, and c.

FIG. 9-a is a detailed block diagram of the operating section 25, FIG. 9-b is a flow chart of the copy monitor LED lighting timing calculation routine in step 5 in the flow chart of FIG. 5, and FIG. Copy monitor LED in step 13
It is a flow chart of the lighting routine.

In FIG. 9-a, 101 is a display unit, 103 is a key input unit,
104 is a driver circuit. An operation unit controller 107 performs data communication with the sequence controller 23 via the line 90. OP represents an output port iP represents an input port. Reference numeral 102 denotes a copy monitor LED, which is composed of 10 light emitting diodes and displays the progress of copying in 10 steps. Reference numerals 105 and 106 are a segment driver and a scan driver for making the copy monitor LED 102 light dynamic. DSG 0 to _n and DSK 0 to _p are a dynamic _scan signal segment signal and a scan signal of the display element. Further, KSK 0 to _q KSR 0 to _m are input / output signals for the matrix scan for the _key switch.

Now, when the operator selects the copy size from the key input unit 103 in step 5 of FIG. 5, the program of the operation unit controller determines the copy size input in step 5-1 of FIG. Go to 2.

In step 5-2, the copy size width is divided into 10 equal parts and the value obtained by dividing the 1/10 copy size width by the sub-scanning one step width of the reader is set as N and M in the RAM in the controller.
At the same time, N and M are communicated to the sequence controller 24, and then the process proceeds to step 5-3 and ends. If the copy size is not input in step 5-1, the process proceeds to step 5-3 and nothing is done.

Next, when the copying operation is started in step 13 in FIG. 5, the program of the sequence controller 24 determines the falling edge of the NLE signal in step 13-1 in FIG. 9-c, and once the NLE is completed, that is, once. When the sub-scan of the main scan is completed, the process proceeds to step 13-2 to decrement the value N sent from the sequence controller 23. Next, step 13-
If N = 0 is determined in 3, and if NO, the process proceeds to step 13-8 and ends. If YES, that is, when the copy operation for 1/10 of the copy size is completed, the process proceeds to step 13-4, and the value of M, that is, the value of N before subtraction is reset to N, and at step 13-5, the copy monitor LED 102 Among the 10 segment signals DSG0 to 9 for the segment driver 105, the LEDs up to L are turned on. The value of L is in the clear state when copying is started and is initially 0. Next, in step 13-6, L is incremented, and in 13-7, the scan signal DSK ₀ for the copy monitor LED 102 is output for a certain period of time to turn on the LED 102, and then the process proceeds to step 13-8 to end.

By repeating the above operation at each falling edge of the NLE signal, the user can confirm that L is changed from 0 to 10 and is completed when L = 10.

As described above, the copy monitor LED 102 divides the number of times of sub-scanning or the time until the end of copying into 10 equal parts according to the copy size, and sequentially counts the number of sub-scanning to turn on the LEDs from step 0 to the operator. Monitor display of copy operation. Therefore, the user can recognize that the copying operation has been completed up to 10 steps out of 10 steps regardless of the copy size.

In the present embodiment, the display is switched according to the trailing edge of NLE to display the passing stage of the recording operation. However, if the display is switched according to the trailing edge of VLE, the progressing stage of the reading operation can be displayed. .

<Effect> As described above, according to the present invention, the progress of the image forming process is displayed as a relative value determined by the size of the recording medium and the amount of movement of the recording head in the sub-scanning direction. There is an effect that the relative value of the image forming process can be displayed without being affected.

[Brief description of drawings]

FIG. 1 is a perspective view of the apparatus of the embodiment of the present invention, FIG. 2 is a schematic perspective view of the apparatus of the embodiment of the present invention, FIG. 3 is a block diagram of a control circuit of the embodiment of the present invention, and FIG. Timing chart, Figure 5 is a sequence flow chart,
FIG. 6-a is a diagram showing the relationship between the original document of the reader and the reading synchronization signal, FIG. 6-b is an enlarged view of the portion A of FIG. 6-a, and FIG. 6-c is due to the displacement of the reading CCD of each color. Explanatory drawing, FIG. 6-d is a view showing the relationship between the copy paper and the recording synchronization signal, FIG. 6-e is an enlarged view of B part in FIG. 6-d, and FIG. 6-f is the position of the ink jet head of each color. Fig. 7-a is a diagram showing frequency division timing according to the scaling factor of the encoder pulse of the reader main scanning motor, and Fig. 7-b is a reading pixel interval in the main scanning direction according to the scaling factor. FIG. 7-c is an explanatory diagram of interpolation and thinning-out operation according to the scaling ratio, FIG. 7-d is a detailed circuit diagram of the scaling buffer memory 31 of FIG. 3, and FIG. Fig. 7 is a detailed circuit diagram of the video data synchronizing signal generating circuit 28, Fig. 7-f is a timing chart of the video data synchronizing signal, and Fig. 8-a is a timing chart. A detailed circuit of the image processing circuit 33, FIG. 8-b is a diagram showing the input / output relationship of the edge extraction circuit 63 of FIG. 8-a, and FIG. 9-a is a detailed block diagram of the operating section 25.
FIG. 9-b is a flow chart of the copy monitor LED lighting timing calculation routine in step 5 in the flow chart of FIG. 5, and FIG. 9-c is a copy monitor in step 13 of the flow chart of FIG. It is a flowchart of an LED lighting routine.

Claims (1)

[Claims] 1. An image reading unit for reading an image of an original to generate an image signal, and a scaling process for the image signal obtained from the image reading unit to scale the size of the image obtained by the image reading unit. An image forming an image corresponding to the image signal scaled by the processing means by moving the recording head in which a plurality of recording elements are arranged in the sub-scanning direction in combination with the main scanning direction and the sub-scanning direction. Forming means, size data generating means for generating data indicating the size of the recording medium imaged by the image forming means, the size of the recording medium generated by the size data generating means, and the size of the recording head on the recording medium. A copying apparatus comprising display means for displaying the progress of image formation by the image forming means with a relative value determined by the amount of movement in the sub-scanning direction.