JPH02188067A - Copying machine - Google Patents

Abstract

PURPOSE:To facilitate an operation procedure by displaying an image of an original on a display means unconditionally when an area editing mode is selected. CONSTITUTION:An image editing menu 402d is selected and a joy ball 313 is rotated to move a menu cursor to 411a; and a setting key 314 is turned on here to select an area editing menu 412a, so that the original image is displayed in an image monitor area 413. When a trimming menu 422a is selected while the original image is displayed, a position specification cursor 431 appears in the image monitor area 413. Therefore, operation for selecting an image display mode need not be performed after the area editing mode is selected.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a copying device that can reproduce images, and further relates to a copying device that can display an edited image of a document to be copied and check the edited image in advance. be.

[Conventional technology]

2. Description of the Related Art Copying apparatuses in recent years generally have editing functions such as a function to selectively copy only a portion of a document or a function to erase and copy only a portion. In a copying apparatus having such a function, it is necessary to set an area for a portion to be copied or an area for a portion to be erased. In order to facilitate this area setting, a copying apparatus has been proposed that is equipped with a display means consisting of a liquid crystal panel for displaying an edited image of a document (Japanese Patent Application Laid-Open No. 62-99769).

In such a copying apparatus having a display function for previewing, it is possible to check the image after editing in advance, and it is also possible to easily add or change the editing according to the displayed image.

[Problem to be solved by the invention]

When editing and copying a document using the conventional copying apparatus described above, an editing mode is first selected, then a mode for displaying the image of the document is selected, and an editing area is set. By the way, regarding area settings for editing operations,
It can be said that displaying the image of the original is essential.

The present invention has been made in view of the above circumstances, and when the area editing mode is selected, the image of the original is always displayed on the display means, so that when editing and copying the original, compared to the conventional example. An object of the present invention is to provide a copying apparatus that can simplify operating procedures.

[Means to solve the problem]

A copying apparatus according to the present invention has an area editing mode in which a latent image is formed on a photoconductor and copied according to an image signal obtained by scanning an optical system with respect to an original, and the original is edited. display means for displaying an image of the document based on an image signal; instruction means for instructing the start of scanning of the optical system; and setting means for setting the area editing mode; When the editing mode is set, the image of the document is displayed on the display means regardless of whether or not there is an instruction from the instruction means.

[Effect]

In the copying apparatus of the present invention, when the area editing mode is selected, the image of the original is always displayed on the display means. Therefore, after selecting the area editing mode, there is no need to perform an operation to select the image display mode.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on drawings showing embodiments thereof.

FIG. 1 is a vertical cross-sectional structural diagram of a copying apparatus according to the present invention,
In the figure, reference numeral 22 is an image league unit for reading an image of a document, and reference numeral 23 is an engine unit that performs an actual copying operation based on image information.

The image league unit 22 includes a scanner unit 10 that reads an optical image of a document set on a document glass 15, a scanning motor 11 that horizontally moves the scanner unit 10, and a scanner unit I.
It is composed of an image signal processing circuit 213 that processes image signals from O, and the like. The scanner section 10 also includes a light source 12 that illuminates the surface of the document through the document glass 15. It is equipped with a convergent rod lens array 13 that captures the light reflected from the document surface and a color CCD linear image sensor 14 that captures the emitted light.
After being converted into an electrical signal by the CD linear image sensor 14, the signal is processed by an image signal processing circuit 213, and sent to a laser diode drive circuit 214, which outputs a polygon mirror as a turning on/off signal for a laser diode (not shown). 31, the light is projected onto the photosensitive drum 41 via the plane mirror 37, and exposure is performed.

The photosensitive drum 41 is configured to be rotationally driven in the direction of the arrow, which is a counterclockwise direction, and a charger 43 is disposed around the photosensitive drum 41 above the rotational drive range, and the photosensitive drum 41 is charged. After being charged by the charger 43, it is exposed to light. Around the photosensitive drum 41, on the downstream side of the charger 43, there is an LE that prevents excess toner from adhering.
A D array 44 is provided, and on the downstream side of the LED array 44, yellow cyan, magenta, and black developers 45a and 45b are provided.

45c and 45d are arranged in this order. A color-separated optical image is irradiated from the image league unit 22, and the potential of the irradiated portion drops, and the developing device 45a for the next step
, 45b, 45c, and 45d, toner adhesion is eliminated. Toner adheres to the areas that are not irradiated and forms an image. A transfer charger 46 is provided below the photosensitive drum 41 to transfer the toner image onto copy paper. Further, an eraser lamp 42 for removing residual charges on the photosensitive drum 41 is provided upstream of the charger 43.

In addition to the photosensitive drum 41, the engine section 23 includes a transfer drum 51. Fuser 48. It is equipped with a K output tray 49, two paper feed trays 50, and the like. The transfer driver 1151 is disposed close to and parallel to the photosensitive drum 41, has a chucking claw 52 on its circumferential surface for holding copy paper as an object to be transferred, and is driven to rotate in the direction of the arrow. Ru. The leading end of the copy paper pulled out from the paper feed tray 50 is fixed to the circumferential surface of the transfer drum 51 by the chucking claw 52 in synchronization with the reading operation by the image league section 22, and then the toner image on the photosensitive drum 41 is transferred. The leading edge of the copy paper also reaches the transfer charger 46 at the same time as it faces the charger 46, and the toner images are sequentially transferred onto the copy paper. During the first rotation of the photosensitive drum 41° transfer drum 51, yellow toner is transferred, and during the second rotation, magenta is transferred.

The transfer process is performed for each color toner in the order of cyan in the third rotation and black in the fourth rotation.

When the four transfer processes are completed for one sheet of copy paper,
The chucking claw 52 is loosened, and the copy paper is separated by the separation claw 4.
7, it is peeled off from the circumferential surface of the transfer drum 51 and transferred to the fixing device 4.
After being fixed at step 8, the image is discharged onto a discharge tray 49.

FIG. 2 is a schematic plan view of the operation panel 300 of the copying apparatus. On the front side of the operation panel 300, there are numeric keys 301 to 310 for setting the number of copies, etc., and a clear button for instructing to cancel the set number and interrupt multi-copying. A /stop key 311 and a print key 312 for instructing to start copying are provided. In addition, on the right side of the operation panel 300, there is a joyball 313 for selecting a copy mode menu, etc., a set key 314 for confirming the copy mode menu etc. selected with the joyball 313, and a center key 314 for confirming the contents. The joyball 3 has a cancel key 315 to cancel the release, and a monitor key 316 to display the original image on the LCD.
13 so that it can be pressed without operating it, and in the center of the operation panel 300 there is a dot matrix type (640 x 4
A liquid crystal display panel 222 (00 dots) is provided.

3 is a schematic side view of the vicinity of the joyball 313, and FIG. 4 is a perspective view of the joyball 313. joyball 3
13 is an angle θ that spans all directions of 360°
It is composed of a stick part 313a that can be tilted down, and a ball part 313b that is a part of a ball attached to the upper part of the stick part 313a.
13b is partially exposed from the exterior surface of the operation panel 300, and when the joyball 313 is rotated, the portion covered by the exterior surface of the operation panel 300 is exposed. Note that the stick portion 313a
is adapted to automatically return to the upright state (θ-0) by a spring (not shown). The rotation angle of the stick portion 313a in each of the X and Y directions is detected by two variable resistors (see FIG. 4), and is detected by A/D conversion 1, which will be described later.
10218, is converted into digital data, is judged by a third CPU 203 (described later), and various controls are performed.

FIG. 5 is a system diagram of the control circuit of this embodiment, in which the first CPU 201. A second CPU 202 that controls the image reader section 22 and an operation panel 30
The third CPU 203 controls the CPU 203.

Signals from a group of sensors 206 installed at various locations in the engine section 23 to detect operating states are input to the first CPU 201 via the IC 205 . On the other hand, IC2
08, a control signal is output to a drive circuit group 209 that drives various motors, solenoids, etc. of the engine section 23. Furthermore, the first CPU 201 includes an image signal processing circuit 213
It also outputs control signals to.

Signals from a sensor group 211 that detect various states of the image league section 22 are input to the second CPU 202 .

The second CPU 202 also operates a driving circuit 210 for the scanning motor 11 and a peripheral circuit 2 for the CCD linear image sensor 14.
12. and controls the image signal processing circuit 213. CCD
Image data from the linear image sensor 14 is given to an image signal processing circuit 213, and the image signal processing circuit 21
The processed image signal from 3 is applied to the ζ laser diode drive circuit 214 via the data bus 226.

The manual input of various keys on the operation panel 300 except for the joyball 313 is sent to the third CPU 203 in parallel l10.
216, and on the other hand, the state of the joyball 313 (information on the direction of inclination of the stick part 313a and its angle) is converted to the third CF'1 via the to/D conversion I10218.
It is input to J203. A liquid crystal display panel 222 is connected to the third CPU 201 via an LCD controller 221, and various displays are made on the liquid crystal display panel 222 by selecting one of two values, ie, on and off, for each dot. The image signal processed by the image signal processing circuit 213 is input to the image signal conversion circuit 225 via the data bus 227, where it is converted into a signal for liquid crystal display, and the converted signal is Parallel I
10220, controlled by the third CPU 203, -
It is then stored in the RAM 224. and a third one if necessary.
The conversion signal is read out from the RAM 224 under the control of the CPU 203 and displayed on the liquid crystal display panel 222. In addition, the RAM 224 is also used for working control programs, and the ROM 223 stores control programs for the operation panel and liquid crystal display data. Further, the third CPU 201 is serially communicated with the first CPU 201 and the second CPU 202 via the serial l10215.

Next, the display contents of the liquid crystal display panel 222 will be explained.

FIG. 6 is a schematic diagram showing the display contents of the liquid crystal display panel 222 (hereinafter referred to as display D1) when the power is turned on. In the figure, 401 indicates the home position of the menu cursor. Further, 402a to 402h indicate each menu, and menu cursor lighting positions 401a to 401h are provided at the left end of each menu, and when an arbitrary menu is selected by operating the joy ball 313, this One of the positions 401a to 401h corresponding to the selected menu is highlighted in black. Note that FIG. 6 shows a state in which the menu cursor is at the home position.

Further, 403 in the figure is a copy number display indicating the number of copies set using the numeric keys 301 to 310, for example, 1 to 9.
The number 9 will be displayed. 404 is a copy magnification display that displays the magnification determined by the function of the "magnification specification J menu 402a," and 405 is a copy magnification display that displays the paper size in the paper feed tray 50 selected by the function of the "paper specification" menu 402b. This is a copy paper size display shown in FIG.

Further, 406 is an information display that displays the current state of the copying device or the processing to be performed on the copying device in characters, pictograms, etc., and 407 is selected and set using the function of the "Density Adjustment" menu 402c. This is a copy density level display showing the copy density, and the density levels are divided into seven levels.

FIG. 7 shows the image editing menu 40 in the state shown in FIG.
FIG. 2 is a schematic diagram showing the liquid crystal display contents (hereinafter referred to as display D2) when 2d is selected. In Fig. 6, the menu cursor is initially located at the home position 401, but
Here, when the joyball 313 is rotated in the Y (-) direction (toward the front in Figure 2), the menu cursor moves to 40 degrees.
If you move in the order of 1a-"401b-"401cm+401d and then rotate in the Y (+) direction, the menu cursor will be 401d-"401cm"401b-=401
Move in order of a. Furthermore, when the menu cursor is at 4016, if the joyball 313 is rotated in the X (+) direction, the menu cursor will change from 401d to 401e-
If you move in the order of 401f-401g-=401h and then rotate in the X (-) direction, the menu cursor will become 401h-401+)t'401f-401e-401
Move in order of d.

When the cent key 314 is turned on when the menu cursor is at the position 401a, an instruction to set the magnification is given. At this time, after setting the magnification using the numeric keys 301 to 310, the copy magnification is set by turning on the set key 314. The magnification setting is Joyball 3
13 may be used. In other words, when the joyball 313 is rotated in the Y direction, the magnification setting value changes to o, oo.
Since the copying magnification increases or decreases in units of t, the copying magnification is set by turning on the set key 314 when the desired magnification value is indicated.

Note that the scanning speed of the scanner section 10 is 1 when the magnification is equal to 1, and is 1/M when the set magnification is M. Regarding the scanning direction of the scanner section 10, the magnification is optically changed. On the other hand, in the direction perpendicular to the scanning direction (the direction in which the light receiving elements of the CCD linear image sensor 14 are arranged in parallel), the image read by the image signal processing circuit 213 is subjected to reduction/enlargement processing.

Next, when the set key 314 is turned on when the menu cursor is at the position 401b, an instruction is given to select one of the two upper and lower paper feed trays 50. At this time, the upper paper size detection mechanism, which will be described later,
The paper size of each lower paper feed tray 50 is also displayed, and by rotating the joyball 313, the paper size of each paper feed tray 50 is displayed.
By selecting 0 and turning on the set key 314, the paper size setting is completed.

Further, when the menu cursor reaches the position 401d, if the set key 314 is turned on, the screen shown in FIG. 7 is obtained. On this screen, each menu 412a to 412
g, lighting positions 411a to 411g corresponding to each menu
.

In addition to the information display 406, an image monitor area 413 appears in which the document image read by the image league section 22 is roughly displayed.

Figure 8 shows the area edit menu 4 in the state of Figure 7.
12a is a schematic diagram showing the display contents (hereinafter referred to as display D3) when 12a is selected. FIG. In the state shown in FIG. 7, rotate the joyball 313 to move the menu cursor to 411a.
, and turn on the cent key 314, the 8th
A screen like the one shown in the figure appears.

There are three types of menus on this screen, 422a to 422C. Here, the "Monitor level" menu 422C
is a menu for changing the comparison data that is the threshold value when converting original image data to display data on the image monitor display, and the density level of the comparison data is shown in seven stages on the monitor level display 423. It will be done.

FIG. 9 is a schematic diagram showing the display contents (hereinafter referred to as display D4) when the image monitor display is completed according to the information display in the state of FIG. 8. In FIG. 8, when a document is set on the document glass 15 and the monitor key 316 is turned on in accordance with the information display, the scanner section 10 scans the document, and when the scanning is completed, the document image is displayed in the image monitor area 413. be done. While the original image is displayed, select the trimming menu 42.
When 2a is selected, a position specifying cursor 431 appears in the image monitor area 413. At this time, in the image monitor area 413, an effective image area frame 424 indicating the area to be actually copied based on the selected paper size and a document frame 425 indicating the edge of the document are displayed to match the document image. Displayed.

Figure 10 shows the display contents (
FIG. joyball 3
13 to move the position designation cursor 431 from the position shown in FIG. 9, set it to the position 441 shown in FIG. be done. When the joyball 313 is further rotated to move the position designation cursor 431 from this position 441 to the position 442 and the set key 314 is turned on, the position designation cursor 431 is fixedly displayed at the position 442. A rectangle 443 whose diagonal ends are the two points fixedly displayed in this way is set as a trimming setting area.

FIG. 11 is a schematic diagram showing the display contents (hereinafter referred to as display D6) when the set key 314 is turned on after completing the second position setting in the state of FIG. 10. When the cent key 314 is turned on after setting the trimming area, the remaining images are erased leaving only the image (A) within the setting area. At this time, the effective image area frame 424 remains displayed so that it can be easily determined whether the remaining image can be copied. Since the area setting in the trimming mode has now been completed, the information display 406 displays "Copy possible".

After setting one area in the trimming mode, the procedure for setting another area in the trimming mode and the contents displayed on the liquid crystal display panel 222 at that time will be explained.

After setting one area (display D shown in Figure 11)
In A), first, the set key 314 is turned on to display the original image of the document again in the image monitor area 413 as shown in FIG. 9 (display D4). At this time, the position designation cursor 431 appears at the second position 442 (see Figure 10) in the previous area setting, a rectangle 443 indicating the previous setting area appears, and the information display shows "
Please set the area." Next, the first
Joyball 313 is exactly the same as when setting the area for the second time.
Rotate to move the position designation cursor 431 to the desired position, turn on the cent key 314, and select 1 in the current setting area.
Specify the point. Next, in the same way, 2 of this setting area
Specify the point. Then, in the image monitor area 413, the remaining images are erased, leaving the original images in the previous setting area and the current setting area, and the information becomes ``copyable''.

By repeating these actions, the third time.

For the fourth time, it is possible to set the area.

The procedure for setting the erase area within the trimming mode setting area and the display contents of the liquid crystal display panel 222 at that time will be explained.

First, rotate the joyball 313 in the Y (-) direction and
Move the menu cursor 421a so that 1b lights up, turn on the cent key 314, and change the mode from trimming mode to erase mode.

Next, the area for the erase mode is set by performing exactly the same operation as when setting the area for the trimming mode.

FIG. 12 shows a first CPU that controls the engine section 23.
201 is a flowchart showing the main routine of step 201. First, when the power is turned on, various timers, flags, counters, etc. used in subsequent subroutines are set to the initial state in step Sit, and then the following processing is performed. An internal timer value serving as a reference time is set and started (step 512). Copy paper is supplied from the paper feed l/ray 50 and held on the peripheral surface of the transfer drum 51. When the transfer of the toner image is completed, the copy paper is separated from the transfer drum 51 by the separating claw 47. The copy paper is conveyed in a series of ways, such as passing through the fixing device 48 and discharging it to the output tray 49.
(Step 513).

The peripheral parts of the photosensitive drum 41 such as charging and development are controlled (step 514), the temperature of the fixing device 48 is controlled (step 515), the paper size in the paper feed tray 50 is detected (step 516), and the second CPU202. 3rd C
Perform serial communication with PU203 (step S1?)
After waiting for the internal timer to end, the process returns to step S12 and starts the internal timer again (step 818).

FIG. 13 shows a second controller that controls the image reader unit 22.
This is a flowchart showing the main routine of the CPU 202. First, when the power is turned on, various timers, flags, counters, etc. used in subsequent subroutines are set to the initial state using the steering knob S21, and then the following steps are performed. An internal timer value serving as a reference time for processing is set and started (step 522). In response to instructions from the third CPU 203, document scanning is started (step 523), and other CPUs
The speed and position of the scanning motor 11 are controlled so that the document can be scanned in accordance with the timing signal from the PU (step 524). CCD peripheral circuit 2 in synchronization with the scanning operation.
12 and a color CCO linear image sensor 14
is driven to obtain an image signal (step 525). The obtained image signal is subjected to various processing such as scaling (step 3).
26), performs serial communication with the first CP port 201 (step 527), waits for the internal timer to end, returns to step S22, and starts the internal timer again (step 328).

FIG. 14 shows a third CP that controls the operation panel 300.
This is a flowchart showing the main routine of U203. First, when the power is turned on, various timers, flag 1 counters, etc. used in subsequent subroutines are set to the initial state in step 531, and then the following processing is performed. An internal timer value serving as a reference time is set and started (step 532). Display on the liquid crystal display panel 222 is performed by giving display image data and commands to the LCD controller 221 (step 533). The on/off states of various keys 301 to 312, 314 to 316 on the operation panel 300 are determined, and the contents are sent to the parallel I10.
216 to the RAM 224 (step 53
4). The rotational state of the joyball 313 is determined and its contents are stored in the RAM 224 via the A/D conversion 110218, and a flag as described later is created (step 535). Various processes in the basic copy mode are performed in step S34.
It is performed in response to the input processing in S35 (step 537), and various processing in the image editing copy mode is performed in step S34. S35. Performed according to the input process in S36 (
Step 538), various processes in the image quality adjustment state are performed in step S34. Performed in response to the input process in S35 (step 539), the first CPU 201. Serial communication with the second CPU 202 is performed (step 540), and after waiting for the internal timer to end, the process returns to step S32 and starts the internal timer again (step 541).

FIG. 15 is a flowchart showing the contents of the scan start routine in step S23 in FIG. 5232)
It is divided into Note that in 5231, the actual copying operation is canceled when a monitor request is made.

FIG. 16 is a flowchart showing the contents of the monitor start routine at step 5232 in FIG.

The monitor request from the third CPU 203 is transmitted to the second CPU 202 by serial communication, and when the request is received (step 52321 YES), the data bus 2
26 is disabled and the data bus 227 is enabled (step 52322).

That is, at this time, the image signal obtained by the color COD image sensor 14 when scanning the original is processed by the image signal processing circuit 213, and then processed by the image signal conversion circuit 213.
Sent to 5. Next, after setting monitor comparison data to be described later (step 52323), the magnification is 1,000x1
A request is made to scan the document with a scanning length of 420 mm (A3T length) (step 52324).

Next, in step 524 (see FIG. 13), the scanning motor 11 is driven based on the magnification value and the scanning length, the document is scanned, and after being converted by the image signal conversion circuit 225, The image signal is stored in the RAM 224. Further, the document size (position) is detected based on the image signal obtained during this scanning.

FIGS. 17 and 18 are schematic diagrams for explaining the operation of the image signal conversion circuit 225. The CCD linear image sensor 14 reads each d at 16 dots/mm.
In contrast, when displaying on the liquid crystal display panel 222, the original l■■ is displayed on the liquid crystal display panel 222.
The image signal conversion circuit 225 converts the image signal for this purpose by using binary values of on and off in correspondence with the dots. FIG. 17(a) is an image reading signal, FIG. 17fbl
indicates an image display signal, and when reading, 1/1
An image signal of 8 bits is obtained for every 6 mm square, but the signal used for display is once (8 bits) for every 6 mm square.
ts) as the only signal.

In FIG. 18, the image signal conversion circuit 225 first converts the 3-bit image signal (a) from the image signal processing circuit 213.
The necessary 8-bit image signal (b) is selectively extracted by dividing the frequency by 16. This 8-bit image signal (4 bits at -L position of bl and 4 bits instructed from the second CPU 202)
ts monitor comparison data (e) and outputs the comparison result as 1-bit data (C). If the upper 4 bits of the image signal are larger than the monitor comparison data, it is set as “1”, and in the following cases, it is set as “O” and 1 bit
Output the data (C) of t. When "1" is output, the liquid crystal is turned on, and when "0" is output, the liquid crystal is turned off. For example, if the image signal (a) is in binary notation (alte 10010011), then SL (
Comparison data) = 8 = 1000 (binary system), “l” is output and the liquid crystal lights up, and 5L = 10 = 101
In the case of 0 (binary system), "0" is output and the liquid crystal turns off.

Furthermore, this 1 bit data (C) is accumulated in order and becomes 8b.
its parallel data (d), parallel T102
20 to the RAM 224 for storage. For example, if the size is 297mm x 420mm, the output order is (T-1, Y-1) → (T-2, Y
-1)→...→(T-297, Y-1)→(T-1,
Y-2)-...→(T-297, Y-420), and RAM 224 has 297X 420-124
．． 74 (kbits) of image data will be stored. The 4-bit comparison data (e) instructed by the second CPU 202 is data indicating the threshold level of display density, and this data can be changed by joyball input on the operation panel 300 as described later.
It is possible to adjust the monitor image to a desired density.

Next, document size (position) detection will be explained. 1st
FIG. 9 is a schematic diagram showing a device for detecting the document size), and FIG. 20 is a schematic diagram for explaining the principle thereof. 14 is a CCD linear image sensor, and in the left and right direction (X direction) in FIG.
0 (linear image sensor 14) scanning direction, the vertical direction (X direction) is the direction in which each light receiving element in the CCD linear image sensor 14 is arranged in parallel.

Depending on whether a document read by the CCD linear image sensor 14 is placed, it is binarized at a predetermined threshold value, and the white/black results of each pixel are stored in a predetermined line memory 511. stored in the address.

For the 1547 minutes of data stored in the line memory 511, the counter 512 sequentially starts from the upper address (second
(A direction in Figure 0) Count the number of black pixels until a white pixel exists, and if there is a white pixel, stop counting there. Similarly, for 1947 minutes of data, the counter 514 counts the number of black pixels in order from the lower address (in the direction of B in FIG. 20) until a white pixel exists, and if there is a white pixel, the counter 514 stops counting there. Each of the counters 512 and 514 can count up to a predetermined value (the total number of pixels for one line), and when it detects the timing when the scanning of the CCD linear image sensor 14 advances by one step in the X direction based on the signal from the scanning motor 11. , and outputs each count value to the corresponding code discriminator 513, 515 and arithmetic unit 516.

Each sign discriminator 513 and 515 discriminates the sign of the difference between the count values in adjacent lines (the count value in the current line - the count value in the previous line) and outputs the discrimination result to the arithmetic unit 516 .

Count values are also manually inputted to the arithmetic unit 516 from each counter 512 and 514. Further, 517 is the scanning motor 11
The signal from the CCD linear image sensor I
The counter 517 is a counter that counts the position address of 4 in the X direction, and the counter 517 outputs this count value to the arithmetic unit 516. In accordance with the increment of the counter 517,
Both counters 512, 514 are reset and counting on the next line begins.

The calculation 1516 calculates the above-mentioned discrimination result and each counter 512°5.
Based on the count value from 14.517, the positions (coordinates) of the four vertices of the document are determined, the lengths of the four sides of the document are then calculated, and the calculation results are output to the comparator 518. The comparator 518 stores the size of standard copy paper, and compares this calculation result with the size of the standard copy paper to detect the original size (position).

Next, we will discuss the operation of document size (position) detection in the 20th section.
As shown in the figure, the original (4 vertices P+, Pz, P:+, Pa
) will be specifically explained based on an example in which Set the x, y coordinate system as shown in the figure, and set the coordinates of each vertex as P
+ (X +, 3' +) + P z (xz,)' z
) + P 3 (X3.Y 3) IF5 (X4.ya)
shall be. Starting from the xi0 position, the CCD linear image sensor 14 is scanned one line at a time in the right direction, and every time one line is scanned, pixels outside the document (black pixels) are counted from both directions A and 8 until a white pixel is reached. Counter 5 when the X coordinate of CCD linear image sensor 14 is X
The count values of 12,514 are A (xt) and B (
xi), then Xi.

Depending on the values of A (1) and B (x,), the four vertices P
I.

Pz, P3. Detect the coordinates of Ps.

At the beginning of scanning (until reaching p), since this is an area where no original is placed, both counters 512 and 51
The count value of 4 is the total number of pixels for one line, but P
When reaching l, the count values of both counters 512 and 514 become smaller than the predetermined value (total number of pixels for one line) for the first time. The sign discriminators 513 and 515 respectively A(x
4 +1) A(xt), B(xt+ 1)B (x
t), and the fact that Pβ has been reached means that A
(xL+l) A This can be determined from the fact that the value of (x,) takes a value other than 0. And the counter 517 at this time
Count value from (X direction coordinate).

The position of Pl can be determined from the count value (y-direction coordinate) from the counter 514. Next, for P2, B (X
It is obtained by checking the sign of t +1) -B (xi). This difference is negative until reaching P2, but after passing P2, this difference becomes positive. Therefore, at many times when this difference changes from negative to positive, both counters 51
The position of P2 is detected from the count value starting from 4.517.

Next, both counters 514 and 5 at the point in time when the sign of A (xi +l) A (xi) changes from negative to positive
Counting from 17 (the position of P4 can be detected directly).

Finally, the position of P can be detected from the count values from both counters 514 and 517 at the time when the count values of both counters 512 and 514 have returned to the predetermined values.

Using the coordinates of the four vertices determined in this way, the lengths of the four sides of the document are detected by the calculator 516. First, P, P2
is calculated based on formula (1) below, and the lengths of the other three sides are also +
Calculate using the same calculation formula as Equation 11.

P, P.

""J (Xz X+)" + ()'z)'
lM...(1) Finally, the calculated length of the four sides and the size of a standard copy sheet are compared by the comparator 51B to detect the size of the original. Note that the prosock diagram shown in FIG. 19 is a part of the image signal processing circuit 213 shown in FIG.
5 to the third CPU 203.

FIG. 21 is a perspective view of the paper feed tray 50, FIG. 22 is a list showing the relationship between paper size, direction, and magnet attachment position, and FIG. 23 shows the contents of the paper size detection routine in step S16 in FIG. 12. It is a flowchart.

As shown in FIG. 21, the paper feed tray 50 is provided with four magnets 501a to 501d at its bottom, and when the paper feed tray 50 is attached to the main body of the copying machine, a reed switch (not shown) is activated. The attachment status of the magnet is now detected. Then, depending on this detection result, the second
The size and position of the paper stored in the paper feed tray 50 are detected based on the relationship shown in FIG. This reed switch is a sensor included in the sensor group 206 (see FIG. 5).

Steps 51601, 51602, 51603, to determine whether or not the four magnets 501a to 501d are attached.
51604,51609゜51614,51615,5
1616), and set the horizontal length of the paper in mm units to Y, and the vertical length of the paper to Tp in units of mm according to this determination result (step 51605.5).
1606.51607.5160B, 51610.5
1611.

S1612, 51613.51617.51618.
51619.51620.51621, 51622)
.

Since such processing is performed for each paper feed tray 50.50 installed in the upper and lower stages, Tp in the upper stage is
, Yp, and T9□ in the lower row.

Data of Y, 2 is obtained. The obtained results are the first CP
In addition to being used by the U 201 itself in the paper transport 3 image forming routine, etc., it is also sent to the second CPU 202 via serial communication and used as judgment material for determining the scanning length.
The information is sent to the third CPU 203 via serial communication and used as various display conditions.

The image monitor display, the display of the effective image area frame 424, and the display of the document frame 425 will be described below.

Figure 24 is l? This is a schematic diagram showing the memory v4 area of the AM 224. The RAM 224 includes an original image data area 224a that stores original image data obtained by reading a document and converting it into rough data for display on a monitor, and an editing process, scaling process, etc. It has an output image data area 224b that stores the image data after being subjected to the processing, and an area 224c that stores information such as various key manual inputs on the operation panel 300 and joyball inputs. Both image data areas 224a and 224b have the same capacity, for example, based on A3 (297 x 420 mm), 297 x 420 x 1 = 124740.
bits#16kbyte is required. When reading a document, the output image data area 224b stores image data having the same content as the original image data area 224a, and as the editing operation progresses thereafter, the content is modified in accordance with the editing operation.

FIG. 25 shows the contents of the display routine in step S33 in FIG. 14, and this display process includes the basic screen display (
Step 5331) and monitor screen display (Step 533)
2) It can be divided into

FIG. 26 is a flowchart showing the contents of the monitor screen display routine in step 5332 in FIG. This shows the control operation. By turning on the monitor key 316, the second CPU 202
The document is scanned under the control of (No. 1315, 16.3)
3), when all the image data is input to the RAM 224 of the third CPt 1203 in the image signal input routine of step S36 in FIG. 14 (step 53321 YE
S), if an output image display based on the results of scaling 1, 4, etc. is requested (step 53322 YES), the output image data is transferred to the VRAM in the LCD controller 221 (step 53323), and the display shown in FIG. Display is performed as shown in display D6) (step 53324), and if no request is made (step 53322 No), the captured image data is displayed on the VRA in the LCD controller 221.
The image is transferred to M (step 53325) and displayed as an original original image (step 53326), and the position designation cursor 431 is displayed (step 53327). The display contents in the image monitor area 413 are switched in the above manner.

Next, after specifying the coordinates of the effective image area frame (step 5332B), this area frame is displayed in combination with the image display (step 53329). Then step 524 (
The coordinates of the document frame are specified based on the document position data obtained in FIG. 13), and this area frame is displayed by combining it with the image display (step 53330). In addition, step 5
If it takes a long time to display each frame in 3328.53329.53330, it is determined whether the frame display is completed immediately before step 53328, and if the frame display is completed, these steps 53328 .533
You can also skip 29.53330.

FIG. 27 is a schematic diagram showing the memory area of the RAM 224 of another embodiment. An original image data area 224a similar to that shown in the figure, a data area 224d that stores information such as the mode and addresses in each mode as editing operations, scaling operations, etc. proceed, and data areas 224d that store information such as addresses for each mode and various key manual inputs, joyball inputs, etc. Area 224c similar to FIG. 24 for storing information
It has For example, when the trimming mode is selected, the data area 224d stores information indicating that the editing mode is trimming, address information of the vertex of the trimming area, and the like.

When the trimming mode is selected, data for turning off the LCD is sent outside the setting area connecting the vertices indicating stored addresses, and original image data is sent inside the setting area in the LCD controller 221. VRA
It will be forwarded to M.

This embodiment has the advantage that the capacity of the RAM 224 is smaller than the above-mentioned embodiment, but compared to the above-mentioned embodiment, the stored data can be output as is.
Since calculation by the third CPU 203 is required when transferring data to the VRAM, an additional processing time is required for data switching.

FIG. 28 is a schematic diagram showing the relationship between the effective image area frame, paper frame, and document frame with the image monitor area 413 corresponding to the entire area in which the original image can be read, and in the figure, the solid line (a) indicates the effective The image area frame is shown by the broken line (b), the paper frame is shown by the broken line (b), and the document frame is shown by the solid line (C). FIG. 29 is a flowchart showing the contents of the valid image area frame coordinate designation routine of step 53328 in FIG. 26. First, the coordinates of XLII YLI shown in FIG. 28 are designated (steps 533281 and 533282).

On the paper, 6 (mu) at the leading edge and 2 (mu) at the side and rear edges.
u+), so in the display, the coordinates of XL, YL, respectively, are set to XLI (ms).
=6/copy magnification, YLI (mm) -2/copy magnification. If the upper paper feed tray 50 is selected (step 533283 YES), step 316
The result calculated using the paper length data Tp and paper width data Yp of the upper paper feed tray 50 obtained in the paper size detection routine shown in FIG. 12 is expressed as X L 2 + Y
Set to LZ (Step 533284. Step 533285). On the other hand, if the lower paper feed tray 50 is selected (No in step 533283), the paper length data Tp2. The result calculated using paper width data Y2□ is XL2.
Set YL□ (Step 533286. Step 533287).

FIG. 30 is a flowchart showing the contents of the effective image area frame display routine of step 53329 in FIG. (Step 5332902). Next, display data D of the image monitor area at that address
(AX, Exc of A with that data and 1"
Data is inverted by performing lusive OR (step 5332903), and 1 is added to AX (step 5332904). Continue this process until AX becomes larger than XL□ Step 5332905N
O) A horizontal line is drawn from the position of the coordinates (XLI, YLI) to the position of the coordinates (XLz, YLI) in FIG. 28, with the liquid crystal turned off and turned on inverted from the image data. When Ax exceeds XL2 (step 533290
5YES), Ax, Ay as X L l + Y L
After setting it back to Z (step 5332906.533
2907), and performs the same processing as described above (steps 5332908 and 5332909).

5332910), coordinates in Figure 28 (XLI, YLZ
) to the coordinate (XL2.YL2).

Next, Ax and Ay are reset to XLII Yt++ 1 (steps 5332911 and 5332912). Next, the display data D (A XI A y ) is inverted by exclusive ORing the previous data and "1" (step 533291
3), add 1 to Ay (step 5332912
). This process continues until AV becomes equal to or greater than YLt at step 5332915 (NO), and the coordinates in FIG. 28 (
From the position of XLI, YLI) to the coordinates (XLI.

A vertical line is drawn up to the position Y L 2 ).

When Ay becomes YL□ or more (step 5332915
YES), reset Ax + AV to XLZI Yt++ 1 (step 5332916.533291
7), and perform the same process as described above (step 5).
332918.5332919.5332920), and the coordinate (X
Lz.

A vertical line is drawn up to the position Y L z ).

As described above, the frame 424 indicating the effective image area based on the size of the paper stored in the selected paper feed tray is displayed in a composite manner on the liquid crystal display panel 222 in accordance with the original image.

Since the effective image area frame changes according to the copying magnification, it is possible to easily confirm the area to be imprinted on the document even when changing the magnification.

The image missing area is provided at the leading edge of the paper because it is impossible to form an image on the portion held by the chucking claw 52, and the image missing area is provided at both side edges and the trailing edge of the paper. This is to prevent toner from adhering to the transfer drum 51. In other words, toner is not transferred to the outside of the paper on the transfer drum, and the image missing Lg i3T area is set in consideration of variations in the chucking position of the paper. By displaying this effective image area frame, it is possible to more accurately recognize which area of the document will be imprinted, compared to displaying the paper size.

FIG. 31 is a flowchart showing the contents of the document frame display routine at step 53330 in FIG.
Based on P+ Pg, Pz P3. P3 Pa, PI
P.

This is for drawing on the liquid crystal display panel 222.

First, the address data Ax and Ay of each x and y component are set to 0 (steps 533301 and 533302). Next, PI, PZ, P detected by the circuit shown in FIG.
3. P+ PZ, PZ P3, P3 to be displayed in the image monitor area 413 based on PI (see FIG. 20)
The display area P of Pa, P4P+ is stored in the memory 224c (step 533303), and then it is determined whether the address data (Ax, Ay) is included in the document frame display area P (step 533304). If included, step 533304 YES) Performs data inversion of display data D (Ax, A) on the image monitor (step 5
33305), if not included, step 533
304 No) Go directly to step 533306 and add Ax by 1. Continue the processing of steps 533304 to 533306 until Ax becomes larger than Xe (step 533307 NO), and when Ax becomes larger than Xe (step 533307 YES), A
Set x to 0 (Step 83330B) and add Ay by 1. Steps 533304 to 533308
The process continues until Ay becomes larger than Ye. A
When y becomes larger than Ye (step 533309 Y
ES), that is, when the document frame display processing is completed, this routine is ended.

In this way, since the frame indicating the document and the frame indicating the effective image area into which the image will actually be printed are displayed together, it is possible to instantly grasp the positional relationship between the two.

FIG. 32 is a flowchart showing the contents of the image editing routine in step S38 in FIG. 14. First, the image monitor is activated (step 3381), the display density level of the image monitor is adjusted (step 5382), and the image is edited If the mode is set (step 538
3 YES),) Processing related to the rimming mode is performed (step 7 5384), and processing related to the erasing mode is performed (step 5385).

FIG. 33 is a flowchart showing the contents of the image monitor routine in step 8381 in FIG. (Step 83812 YES)
, or when the area editing mode is selected (step 83814Y) even if the monitor key 31G is not on edge (hereinafter, the time when the key changes from the off state to the on state is referred to as on edge) (step 53812 NO).
ES) is requested to display a monitor image (step 53813).

In this manner, in the present invention, when the area editing mode is selected, display of the monitor image is requested regardless of whether the monitor key 316 is on or off. This monitor image display request is sent to the third CP via serial communication.
It is transmitted from U203 to the second CPU 202, and the optical system (
The scanner unit 10) scans the document, and the image of the document is displayed on the image monitor area 413 of 222 on the liquid crystal display panel.

As described above, in the present invention, when the area editing mode is selected, the monitor image is automatically displayed, so that the input operation for displaying the monitor image can be omitted. Note that instead of editing and copying,
For example, if you want to check the position of the original, press monitor key 3.
Since the monitor image can be displayed at the desired timing by turning on 16, the monitor image display will be in the area & [
Even if it is linked to i-mode selection, there is no problem.

FIG. 34 is a flowchart showing the contents of the density level adjustment routine of step 3382 in FIG. 32.

Regarding the link between the actual copy density level and the monitor image density level (monitor level), when the copy density level specification is changed, both the actual copy density level and the monitor level are changed in accordance with this specification change. On the other hand, when the designation of the monitor level is changed, only the monitor level is changed in accordance with this designation change.

In steps 538200 to 538203, the time point at which the copy density level display 407 (see FIG. 6) on the liquid crystal display panel 222 is changed is detected. If the edge flag is O (step 538200 YES), this flag is set to O at the time of initial setting), and the previous copy density is different from the current copy density (step 538201 YES).
S), set the edge flag to 1 (step 338202
). Then, after the -degree edge flag is set to 1,
When this subroutine is called (step 3382
0ONO), the edge flag is returned to 0. Thereafter, depending on the designated state of copy density (steps 538204 to 33)
8209), setting a counter CDL that determines the actual copy density level (steps 538210-33821)
6). This value is used as the threshold level (4 bits in Figure 18) when converting the read original image data to display data (data indicating whether the liquid crystal is on or off).
s data (e)). If the edge flag is 1 at each copy density, then (
Steps 53B217 to 538223 YES), the monitor level is set according to the designated state of the copy density (steps 538224 to 538230).If the edge flag is 0 (step 538217
~538223NO), the process returns to the main routine and the monitor level remains at its previous state.

Depending on the designated state of the monitor level (display content of the monitor level display 423 (see Figure 8)),
1-S38236), comparative data (Figure 18(e))
Set SL (steps 538237 to 538243
).

As described above, density changes at the monitor level can be accepted by changing the actual copy density designation or by directly changing the monitor level settings.

Next, a control procedure regarding the operation of the joyball 313 will be explained. FIG. 35 is a graph showing the relationship between the rotation angle θ of the stick portion 313a of the joyball 313 and the processing speed Vc, and FIG. 36 is a graph showing the relationship between θ and Vc and the reference timer value TM for determining the moving speed Vc for each cursor. FIG. 37 is a schematic diagram showing the movable range of the stick portion 313a.

As shown in FIG. 37, if the center position at which the stick portion 313a automatically returns is θ-30°, the stick portion 313a has a movable range from θ-0 to 60°, and the menu cursor and The moving speed Vc of the position specifying cursor changes as shown in FIG. Although the speed change is expressed in one dimension in FIG. 35, it is actually two-dimensional as shown in FIG. 4, and is controlled independently in the X direction and the Y direction.

If 25°<θ<35°, the cursor (menu cursor or position designation cursor 431) does not move (Vc - ). 20°≦θ≦25°, 35°≦θ≦
If the angle is 40°, the cursor moves at a certain reference speed (Vc=1). 0°≦θ≦5°, 55°≦θ≦6
0', the speed is five times the reference speed (V
The cursor moves at c=5). 5°〈θ＜20゜4
When 0°<θ<55°, the cursor moves between Vc=1 and 5 using the quadratic function combination of θ shown in FIG.

FIG. 38 is a flowchart showing the control details of the moving speed of the cursor, and FIG. 38 shows the details of step S35 in FIG. 14.

Depending on the magnitude of the rotation angle θX in the X direction (step 53
501.53503, 53505), X component movement speed V
Set Cx to a value of 1 to 5 (step 53502.5
3504.53506). Here, the values of constants Kt, Kz, and K3 in 53504 are each 0.007619 as shown in FIG. -0.4571°7.0
It becomes 91. 25〈θx〉35 (Step 33
505 NO), reset the flag PMVx requesting movement of the cursor in the X direction (step 53517);
Comparison timer T for determining the X direction movement timing
Stop Rx (step 53518). Note that when the flag FMVx is set to 1, steps S37,
A cursor movement process is performed in either S3B or S39 (FIG. 14), and the flag is returned to zero.

After VCx is set, if the screen state is the menu cursor moving state as shown in Figure 6.7.8 (
If step 53507 is YES, /VCX is set to the reference timer value TMx that determines the X-component moving speed (step 53508). After the VCx is configured,
When the screen state is in the moving state of the position designation cursor as shown in Figures 9 and 10 (Ste knob 53507 NO)
In this case, 5/VCX is set to the reference timer value TMx (step 53509). Here Ka = 1000 (
Since the reference timer value TMx is set as K, =50 (msec), the result of the reference timer value TMx is as shown in FIG.

If the comparison timer TRx is not in addition and has stopped (step 53510 YES), and if the comparison timer value TRx has reached the reference timer value TMx (step 53511 YES), the flag FMV is
Set x to 1 (step 53512), compare timer TR
Start counting x from O (step 53513).

The moment the joyball is rotated to a position other than 25<, θ<35, the flag FMVx becomes 1 and the cursor is moved.
After that, the cursor moves at the standard timer time corresponding to the amount of rotation. Here, this time is a value that corresponds to the amount of rotation of the joyball at that moment, and the cursor is moved by comparing this value with the constantly operating reference timer value, so the movement has excellent responsiveness. There is. Also, after completing the desired movement, the rotation angle of the joyball is changed to 25〈θ〈
If the value is returned to 35, the cursor will not be moved thereafter.

Next, it is determined whether θX is 30 or more (step 53514), and if it is 30 or more (step 5351
If the flag is less than 30 (No in step 53514), the flag FDRx is set to O (step 53516).

When FDRx=1, the movement is in the X (+) direction (rightward in Figure 2), and when FDRx=O, the movement is in the X (-
) direction (to the left in Figure 2).

The above processing is performed in exactly the same way for the X direction component (steps 53519 to 5353 in FIG. 38(b)).
6), the X-direction movement request flag FMVy & the y-direction movement direction flag FDh are specified.

Movement request flag FMVx determined as described above.

FMVy and movement direction flags FDRx and FDRy are
Steps S37° and S38. perform various processes depending on the state of each flag. It is used for the determination in S39 (FIG. 14). Further, when at least one of FMVx and FMVy is 1, steps 5331 and 53
32 (Figure 25), one of the actual menu cursors or position designation cursors according to the status of each of the above flags.
Unit movement processing is performed. At the stage when this process is completed, the movement request flags FMVx and FMVy are returned to "0", and step 53512 (FIG. 38 fan) is executed for FMVx, and step 535 is executed for FMνy.
The position of the position specifying cursor in step 53327 (FIG. 26) and the position of the menu cursor in step 5331 (FIG. 25) do not change until the value becomes "1" in step 30 (FIG. 38(a)).

Note that the above-mentioned movement of the cursor by one unit refers to movement of one dot in each of the x and y directions on the liquid crystal display panel 222 in the case of a position specifying cursor, and in the case of a menu cursor, it refers to movement of one dot from one cursor position. Refers to movement to the immediately adjacent cursor position in each of the x and y directions.

〔Effect of the invention〕

As detailed above, in the copying apparatus of the present invention, when the area editing mode is selected, the image of the original is unconditionally displayed on the display means. There is no need to perform an image display selection operation again.

Therefore, in editing and copying, the selection operation of image display can be omitted, and the operating procedure can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional structural view of a copying apparatus according to the present invention, FIG. 2 is a schematic plan view of the operation panel, FIG. 3 is a schematic side view of the Joyball, and FIG. 4 is a perspective view of the Joyball. Figure 5 is an overall control system diagram, Figures 6 to 11 are schematic diagrams showing the display contents of the liquid crystal display panel, and Figure 12 is the first CPU 20.
13 is a flowchart showing the main routine of the second CPU 202, FIG. 14 is a flowchart showing the main routine of the third CP port 203, and FIG. 15 is a flowchart showing the main routine of the third CP port 203. Figure 16, Figure 23, Figure 25, Figure 26, Figure 29~
Figures 34 and 38 are flowcharts showing subroutines of the main routine, Figures 17 and 18 are schematic diagrams for explaining the operation of the image signal conversion circuit, and Figure 19 is a flowchart showing the subroutine of the main routine. A block diagram showing the device configuration, Fig. 20 is a schematic diagram for explaining the principle of document size detection, Fig. 21 is a perspective view of the paper feed tray, and Fig. 22 shows the relationship between paper size and position and magnet mounting position. The table shown, FIGS. 24 and 27 are schematic diagrams showing the memory area of the RAM,
Fig. 28 is a schematic diagram showing the relationship between the effective image area frame, paper frame, and document frame, Fig. 35 is a graph showing the relationship between the rotation angle of the joyball and processing speed, and Fig. 36 is a graph showing the relationship between the rotation angle of the joyball and the processing speed. A table showing the relationship between processing speeds and reference timer values, and FIG. 37 are schematic diagrams showing the movable range of the stick part of the joyball. 10...Scanner Department 22...Image League Department 4
1... Photosensitive drum 222... Liquid crystal display panel 31
6...Monitor key 412a...Area editing menu Agent Patent attorney Noboru Kono Fig. Fig. [! 2C: Pυ202] Figure [11C: PU20+1 Figure Main Scanning Figure (a) Funeral Figure (b) Figure Figure 0: Without magnet 1: With magnet z Figure Figure Figure Figure Figure Figure Figure Figure Funeral Funeral map Figure 3S Figure Figure

Claims (1)

[Scope of Claims] 1. A copying apparatus having an area editing mode in which a latent image is formed on a photoreceptor and copied according to an image signal obtained by scanning an optical system with respect to an original, and the original is edited, comprising: display means for displaying an image of the document based on an image signal; instruction means for instructing the optical system to start scanning; and setting means for setting the area editing mode; A copying apparatus characterized in that when an editing mode is set, an image of the document is displayed on the display means regardless of whether or not an instruction is given by the instruction means.