JPS61223761A - Copying machine - Google Patents

Abstract

PURPOSE:To easily confirm a set area by displaying the copying area of the set area. CONSTITUTION:A command part 320 is provided at the front side in a digitizer 304 formed of a transparent electrode and a command is selected by pressing a pen similarly with coordinates input during area specification. In this case, depression coordinates of a pen area read to judge area specification or magnification specification when the coordinates are within an original setting area or select a command corresponding to the coordinates among commands 321-324 when within a command part area. Thus, an area and a color are specified by the digitizer 304 and a CPU copies the area in internal or external extraction mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to area designation in a copying device.

[Prior art]

Conventionally, when trying to copy only the desired part of a document,
I had to cover unnecessary parts of the manuscript with paper etc. to make copies. However, in recent years, devices have been considered that have a region designation function, in which the coordinates of a region are designated using a numeric keypad or the like, and only the inside or outside of that region is copied. However, when trying to confirm the set area, the coordinates of the area were expressed numerically, making it difficult to understand intuitively. Also, outside or inside the area.

It was also difficult to understand how to copy it.

〔the purpose〕

The present invention has been made in view of the above points, and an object of the present invention is to provide a copying apparatus in which the setting area can be easily confirmed by displaying the copying area of the setting area.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Description of Main Body FIG. 1 is a sectional view showing an embodiment of a double-sided copying machine to which the present invention is applied, in which an RDF 9 (automatic document feeder) and a sorter 39 are attached. Also, instead of RDF9, pressure plate 9
0 is also set, and in each of these configuration diagrams, the surface of the drum l is made of a seamless photoreceptor using ASI.

Rotatably supported. When the power is turned on by the power switch 2, the fixing device 3 is heated, and when it reaches a predetermined temperature, the main motor 4 moves the drum 1, conveyance sections A, B,
C and the fixing roller 5 start rotating in the direction of the arrow. When the temperature reaches a predetermined fixing temperature, the main motor 4 stops after performing potential control processing (pretreatment) and determining whether or not there is toner in the developing device 6.7, which will be described later. This is a timing state in which it enters a standby state and waits for a copy start signal.

First, the copying mode that can be performed by the copying machine of the present invention will be briefly explained, and then the copying process will be sequentially explained. Copying modes include one-sided copying mode, in which an image is formed on one side of the transfer paper and then ejected, two-sided copying mode, in which images are formed on both sides of the transfer paper and then ejected, and multiplex, in which multiple images are combined on one side of the transfer paper and then ejected. It can operate in copy mode, and in single-sided copying mode and single-sided copying mode, copying is performed using intermediate tray 8.

Furthermore, by having a plurality of developing devices 6.7, it is possible to copy onto transfer paper in a plurality of colors. Furthermore, by detecting the document size, it has AMS (automatic magnification change) and APS (automatic cassette selection) functions, and is equipped with a zoom function, etc.

(Double-sided copy mode) First, the process of obtaining a double-sided copy from a double-sided original will be explained. After setting the original 10 on the RDF 9, enter the key to make double-sided copies from the double-sided original on the operation unit 11, which will be described later. Next, set the number of copies, and after specifying the black developer 6 among the developers, press the copy start key. Enter. RDF
The original 10 set at 9 is conveyed onto the original glass 12. In addition, in the main body, the illumination lamp 14, which is integrated with the first scanning mirror 13, is set at the reference position 92, and performs potential control (described later) and input light of the document detection CCD (details will be described later). .

Next, the original 10 is illuminated by an illumination lamp 14 that is integrated with the first scanning mirror 13 , and the reflected light is scanned by the first scanning mirror 13 and the second scanning mirror 15 . The first scanning mirror 13 and the second scanning mirror 15 are l:
By moving at a speed ratio of 1/2, the original is scanned while keeping the optical path length in front of the projection lens 16 and the original detection lens 17 constant.

In this way, the above-mentioned reflected light image is formed on the detection element CC018 through the document detection lens 17, and also passes through the projection lens 16, the third mirror 19, and the fourth mirror 20, and is imaged on the drum.

On the other hand, after the drum l is neutralized by the pre-exposure lamp 21, it is corona-charged (for example, charged by ten) by the primary charger 22, and then the image irradiated by the illumination lamp 14 is exposed to the slit a light, and the electrostatic potential is An image is formed. During the document size detection scan, the latent image is erased by the eraser lamp 23, and the AC portion of the developer bias is set to 0F.
It applies a bias to prevent toner from adhering to the original size detecting element C0 by FLDC.
The reflected light on the front original glass 91 is inputted to the D18 as original information, but the reflected light from the area where there is no original is
It is designed to be very low.

The COD processing will be described later.
After the OD processing is completed, scan for copying,
After obtaining the electrostatic latent image as described above, the designated developer 6 or 7
visualized by.

The transfer paper in the manual feed cassette 24, upper cassette 25, lower cassette 26, or deck 27 is fed from a designated paper feed slot by the paper feed roller 50, 51, or 52, and is conveyed to the front of the registration roller 28. Ru. 1st
A predetermined time T after a member 29 attached to an illumination lamp 14 (hereinafter referred to as a moving optical system) unit configured integrally with a scanning mirror 13 is detected by a document leading edge position (image leading edge) detection sensor 30. Then, the registration roller 28 is driven, and the transfer paper is moved onto the photosensitive drum l with accurate timing so that the leading edge of the latent image and the leading edge of the transfer paper coincide.
sent in the direction of After that, transfer charger 31 and drum 1
The toner image on the drum L is transferred to the transfer paper by passing the transfer paper between the drum L, and after the transfer is completed, the toner image is transferred to the charger 3.
2 from the drum 1. Thereafter, the surface of the photoreceptor drum 1 is cleaned by the cleaning device 33, and the potential unevenness is evened out by the pre-exposure lamp 21, so that it can be used repeatedly.

Further, the transfer paper separated from the photoreceptor drum l is guided to the fixing device 3 by the conveyance unit (A), and after being fixed,
The paper path path is switched and controlled by the flapper 34 so that it is transported to the duplex unit 35, and the transfer paper is transported to the transport section (
It switches back through B) and (C) and is stored in the intermediate tray 8. When the exposure operation for the set number of sheets is completed, the original 10' on the original platen 12 is passed through the RDF (D).

The switchback is performed by steps (E) and (F), and the document 10' is again set on the document table 12 so that the back side thereof is copied. After the setting is completed, the transfer paper fed from the intermediate tray 8 by the paper feed roller 37 is transferred to the conveyance path CG)
The document is conveyed to the front of the registration rollers 28, and after a predetermined time T1, the member 29 to which the moving optical system unit is attached is detected by the document edge position (image edge) detection sensor 30, and then the registration rollers 28 are moved. drive,
The sheet is sent toward the photosensitive drum 1 with accurate timing so that the leading edge of the latent image and the leading edge of the transfer paper coincide. after that,
When the transfer paper passes between the transfer charger 31 and the drum 1, the toner image on the drum I is transferred, and after the transfer is completed, it is separated from the drum 1 by the separation charger 32. The surface of the photosensitive drum 1 is cleaned by the cleaning device 33, and unevenness in potential is evened out by the pre-exposure lamp 21, so that it can be used repeatedly.

Further, the transfer paper separated from the photoreceptor drum l is guided to the fixing device 3 by the transport unit (A) and fixed thereon, and then passed through the paper ejection roller 8 by the flapper 34 to the sorter 39.
is discharged. The copying operation is completed by performing this operation for the set number of copies. Further, the original 10' on the original table glass 12 is discharged onto the original tray 40 via the paper path path (D).

It is also possible to make double-sided copies from single-sided originals. In this case, the original lO set in the RDF9 is placed on the paper path path (H
) and set on the original glass 12, the exposure operation for the set number of sheets is performed, and the transfer paper is transferred to the intermediate tray 8 as described above.
will be stored in. When the exposure operation for the set number of sheets is completed, the original lO' is discharged onto the original tray 40 via the paper path path (D). Further, in parallel with this original ejection operation, the next original is fed and set on the original glass 12. Then, an exposure operation is performed on this document, a copy is made on the other side of the transfer paper that has been copied on one side and is stored in the intermediate tray 8, and the document is discharged to the sorter 39. Further, when the exposure operation for the set number of sheets is completed, the originals are discharged onto the original tray 40 via the paper path path (D). This operation is repeated until the original has been circulated once.

(Multiple Copying Mode) Next, the basic process of multiple copying and the movement of the transfer material will be explained. After setting the original on the RDF 9, specify the multiple copy mode using the keys in the operation section 11, which will be described later. Next, set the number of copies, then select the developer to be used from among the multiple developers, and specify the developer. After doing this,
Enter the start key. As a result, the original lO set on the RDF 9 is conveyed to the exposure position on the original glass 12. Then, as in the double-sided copying mode, a toner image is formed on the photosensitive drum l, and this toner image is transferred onto the transfer paper. Then, the paper path path is switched and controlled so that the transfer paper separated from the photoreceptor drum 1 is guided to the fixing device 3 by the transport unit (A) and fixed thereon, and then transported to the multiplex (double-sided) unit by the flapper 34. be done. As a result, the transfer paper passes through the conveying section (B) and is stored in the intermediate tray 8 by the switching device 41. Repeat this operation for the set number of sheets to complete the copying operation. Next, eject the original 10' on the original platen 12 to the original tray via the RDF path (H), and then take out the next original from the RDF 9. After setting the original on the original platen 12 as described above, the intermediate tray 8 is placed in order to copy on the same side of the transfer paper.
The transfer paper fed by the paper feed roller 37 is transported to the front of the registration roller 28 by a transport path CG), and is separated from the photoreceptor drum l, where the copying operation is performed in the same manner as in the case of backside copying in the duplex copying mode. The transferred transfer paper is guided to the fixing device 3 by the conveyance unit A and fixed thereon, and then discharged by the flapper 34 through the paper discharge roller 38 to the sorter. This operation is repeated for a set number of copies to complete the copying operation.

Further, the original on the original glass 12 is discharged to the original tray 40 via the paper path path (H).

Next, the page snapshot mode will be explained.

After setting the original on the RDF 9, use the operation section 11 (to be described later) to manually press the keys to perform quick copying, and then set the number of copies. It has a mode in which the colors of one side and two sides of continuous shooting are automatically determined in advance. In the following explanation, the document size is A3, the magnification is 1x, APS (automatic cassette selection) is selected, and the - side and the second developer are predetermined (the first side is black, the second side is black, the second side is This section explains the operation of the red side) mode. - Assuming that the side copy size is A4 size and 1/2 of the original A3) As described above, the original fed to the exposure position by the RDF 9 is scanned by the first scanning mirror and the illumination lamp 14, After obtaining the latent image, it is visualized by a predetermined black developing device, and is then visualized by paper size sensors 42 and 43 attached to the upper and lower cassettes or decks.
, 44ffi selects the paper feed port in which A4 size transfer paper is set 0 For example, upper cassette 25 has A3 size, lower cassette 26 has A4 size, deck 2
If B4 size transfer paper is set in 7, lower cassette 2 with A4 size is inserted.
The paper is fed by the paper feed roller from the paper feed port 6, is conveyed to the front of the registration roller 28, and the member attached to the moving optical system unit is detected by the image tip sensor 30. After time T1, the registration roller 28 is driven and the photosensitive drum 1 is moved with accurate timing.
The leading edge of the latent image is aligned with the leading edge of the transfer paper.

Thereafter, as described above, the paper goes through a transfer process, a fixing process via a conveyance system, is discharged, and copying is completed, and then the second copying begins. The moving optical system automatically returns to the optical system reference position 15 (home position) when the first exposure scan is completed.
The second copy start starts from the reference position 15, and after the member 29 attached to the moving optical system unit 45 is detected by the image tip detection sensor 30, The eraser lamp is turned on for a predetermined time T2 (width of A4 size) to erase the latent image of the - side and the potential of unnecessary areas, and obtain a second latent image. is visualized by a predetermined red developing device (color developing device), and the paper is fed by a paper feed roller from the paper feed port of the lower cassette 26 into which the A4 size is pushed, and then the paper is fed to the registration roller 28.
Then, after a predetermined time T3, the registration roller 28 is driven, and the sheet is sent in the direction of the photosensitive drum 1 with accurate timing, so that the leading edge of the latent image and the leading edge of the transfer paper are aligned. . Thereafter, as described above, the image is discharged through a transfer process, a fixing process via a conveyance system, and copying is completed. Further, as mentioned above, combinations of double-sided copying and a plurality of developing units, combinations of double-sided copying and continuous copying mode, combinations of multiple copying and multiple developing units, combinations of multiple copying and quick copying mode, etc. will be described later. It is configured so that it can be specified using the operation panel. Another function is to vary the process speed (peripheral speed of the photosensitive drum 1) when the irradiation light to the photosensitive drum 1 is insufficient. When the function is selected, the process speed is automatically reduced.

In addition, as another function, an eraser lamp in which a large number of printing elements are finely divided is arranged after image exposure and before development so that any part of the latent image on the photosensitive drum l can be erased.
It is constructed so that any latent image can be erased by controlling the light-emitting elements of the publishing section, and functions so that one image can be synthesized by combining the aforementioned multiple copies and the colors of multiple developing devices. It is.

In addition, in order to make the process speed variable as described above, this embodiment uses the DC motor MI4 as the drive source, which will be explained using FIG. 2, and the speed is controlled by PLL control. is input to the PLL 81 as a reference, a speed signal from an encoder 82 connected to the DC motor MI4 is fed back, and the output of the PLL 81 is driven through an amplifier 83 so that the reference signal and the feedback signal are synchronized. 8
4 drives the DC motor 4, and when changing the speed, it is controlled by input signals A and H to change the output frequency of the oscillator 80.
, B are connected to a speed command circuit (not shown).

Operation timing Figure 3 shows the timing chart of the entire machine, and Figures 4 to 8 are for pre-rotation and potential control.

A timing chart of CCD dimming, CCD measurement, scanning, and post-rotation is shown. In FIG. 3, after the power is turned on, the fixing heater is turned on, the scanner is returned to the home position, and the lens performs initialization movement.
Pre-rotation potential control is performed after the fixing temperature reaches 185°C.

After the CCD dimming and post-rotation are performed and the fixing temperature reaches 195°C, the standby state is entered and copy key reception becomes possible. After the copy key is turned on and the pre-rotation potential is controlled, the lens moves to a position where it does not collide with the second mirror during a full scan in preparation for a COD measurement scan. Next, CCD light control and CCD measurement are performed to detect the size and original density. Thereafter, the lens is moved according to the magnification or specified magnification by AMS calculation. After scanning the set number of sheets and reversing the last one, it will start the post-rotation.

Figure 4 is a timing chart of the pre-rotation, in which pre-exposure, blank exposure, and post-exposure are ONL in synchronization with the main motor, and from pre-exposure, the primary, post, and transfer 9-separation charging is turned on sequentially from the pre-exposure to the drum. - Rotation brings forward rotation end.

During a copy operation, the specified developer is driven in synchronization with the main motor, and when it passes the potential sensor position from pre-exposure, the developing bias is set to the sensor output potential +2.
Enters 00V control. At this time, the other developing device is in a floating state.

FIG. 5 is a timing chart of potential control. At the start of potential control, the blank is turned off to form a dark potential on the drum. The drum potential is measured by a potential sensor, and the primary charging current is varied so as to approach the dark potential target potential of 450V. This is called Vo sub-control, and is performed four times.Then, the amount of light from the illumination lamp is controlled using the primary current obtained by VD, and the lamp is turned on to form a bright potential on the drum. The drum potential is measured by a potential sensor, and the light amount of the illumination lamp is controlled so that the bright potential approaches the target potential of 50V. This is called VL1 control, and is performed three times.The bright potential is measured again using the amount of light obtained at VL1, and this potential is called VL2, which is used to determine the developing bias DC.

After the VL2 measurement is completed, potential control is completed.

FIG. 6 is a timing chart for CCD dimming and CCD measurement. In COD dimming, the illumination lamp is controlled to have a light intensity suitable for COD measurement. The scanner is in the home position, exposing the standard white plate,
The amount of reflected light is measured by COD, and the amount of light is controlled so that the maximum value on the - line is at a predetermined level. After this control is completed, the optical system performs a full scan and determines the size of the original and the a change. Detect location. At this time, when it is detected that there is no document, the threshold level and lamp light intensity are changed and scanning is performed again.

FIG. 7 is a timing chart of copy scanning. The optical system starts moving forward, and from the position where the image tip is detected, the developing bias DC becomes VL2+70v, and the developing bias AC is also turned on. Further, desired blank lighting control is performed from the tip of the image at a predetermined timing.

FIG. 8 is a timing chart of post-rotation. After the final reversal of the scan, the rotation starts and the developing unit, developing bias DC, developing unit AC is turned off sequentially from the primary charging.
, -t=7++200V, 0FFL, further post charging,
Transfer charging 1 separation charging is turned off. After one rotation of the drum from the primary charging OFF, the developing bias DC becomes Ov.

The main motor after the last paper has been ejected.

Blank exposure, post-exposure, and pre-exposure are turned off and the system enters standby mode.

Operation system FIG. 9-1 is a perspective view of a copying apparatus according to the present invention,
Reference numeral 251 denotes a document placement glass, and a touch panel using transparent electrodes is provided on the glass surface, and by pressing a pressing pen 252 on the document placement glass 251, the coordinates of a specified position are detected. I can do that.

Note that the principle of the touch panel will be omitted here. Of course, 253 does not affect the latent image formed on the photoreceptor because transparent electrodes are used even when the original is exposed to light to form an image.

This is a switch provided on the pen, and coordinate input can only be executed when the switch is pressed. Reference numeral 254 denotes an LED array installed at the edge of the document placement glass 251 along the X and Y directions, and can be turned on and off at will based on instructions from the main body CPU. Reference numeral 255 denotes an operation unit, which controls control input/output commands to the copying apparatus.

FIG. 10 is a top view of the operating unit, and the functions of each year will be explained in order.

100a-c are function keys, respectively;
It can be set arbitrarily using each key on the operation unit. This is a copy mode storage and recall key, and can store up to 5 types of modes. In other words, it is possible to memorize the mode that the user uses on a daily basis, the unique magnification used by each user, or the area specification area described later, and instantly by pressing one key. In a copying machine that allows a desired copying mode to be set, the memory is always maintained by a backup power source.

Numeric keys io1 to io110 have the function of setting the number of sheets as well as inputting various data in various asterisk modes in combination with the asterisk key.

Reference numeral 111 is a clear key for clearing the set number of sheets or data, and reference numeral 112 is a reset key for returning the set mode to a predetermined standard mode, returning to the normal copy mode.

113 is a preheating key, and 114 is an asterisk key for shifting to various asterisk modes. 115 is a copy stop key.

Reference numeral 116 is a color key for selecting a plurality of developing devices built into the main unit, and when a color developing device is selected, the built-in LED 50 lights up, including as a warning.

151 is a copy start key, and the LED is green when copying is possible (excluding copying), and red otherwise.
(151) is lit and displayed. 119 is the AE key,
An AE mode is selected in which the original density is detected and the developing bias is corrected to obtain a copy with an appropriate density. Note that when the AE mode is selected, the display 152 lights up. Reference numerals 118 and 120 are manual density adjustment keys, and the density level can be increased or decreased using the keys 118 and 120 to obtain a desired density. Note that pressing the key 118 increases the density (darker), pressing the key 120 lowers the density (lighter), and the density level on the display 153 changes accordingly. 152 and 153 are display groups indicating the above density conditions. 154 is a 7-segment display that displays the number of copies.

Reference numeral 121 is a cassette selection key, which is used when manually selecting a cassette stage.
) has a function.

155 is a display group indicating the stage selected by the cassette selection key 121 or the APS mode.

122 is a fixed enlargement magnification selection key, 123 is a fixed reduction magnification selection key, and 124 is an automatic paper selection (Auto paper selection) key.
Magnifica-tion 5elect
:AMS) key, which has a function of automatically selecting an appropriate magnification based on the detected original size and the selected cassette size. Note that if the AMS mode is selected, the display 15B lights up. 125 is a zoom key, which allows the magnification to be adjusted in 1% increments using the 10 key and the - key. Reference numeral 126 is an equal magnification key, which sets the copy magnification to equal magnification (100%). Note that the display 157 lights up in the same-size mode. 156 is a dot matrix type fluorescent display tube, and normally has a set copying magnification of 1 and a selected cassette size.

It displays the copy mode, etc., and also functions as a message display for complicated operation procedures, etc. when the device is abnormal or the operation screen is in need.

127 is a [single-sided/double-sided] copy selection key that automatically copies two single-sided originals onto both sides of one sheet of paper using the intermediate tray in the main unit, and 128 is an automatic circulation document feeder (RDF). ) is used to copy a double-sided original onto one side of two sheets of paper. 129 is a copy selection key that copies a double-sided original onto both sides of one sheet of paper using the intermediate tray and RDF. 130 is a multiple copy selection key for overlapping two or more images on one sheet of paper to perform multiple copying using an intermediate tray.

Note that when any one of $-127 to $-130 presses one key, one of the indicators 159 to 162 lights up correspondingly.

Reference numeral 131 is a page continuous copying selection key, which enables exposure scanning of the original on the document table into two parts, left and right, with a single operation to obtain two copies (referred to as A copy and B copy). Select the mode to use.

Reference numeral 132 denotes a page continuous copy, multiple copy, and selection key, which has a function of multiple copying A copy and B copy in the page continuous copy mode described above onto the same sheet.

Reference numeral 133 denotes a page continuous copy Φ double-sided copy selection key, which has the function of copying the above-mentioned A copy and B copy onto the front and back sides of the same sheet using the intermediate tray.

Reference numeral 134 denotes a frame erase key which has the function of erasing the edges of the book or the shadows that appear in the center of the spread in the page continuous copying mode.

Reference numeral 135 is an image shift key, which allows the image to be shifted in either the left or right direction. Also, by pressing the numeric keypad while holding down this key, the shift amount can be adjusted. Further, this shift amount can also be stored in memory using function keys 100a-e.

Reference numeral 136 is an area designation key, which also serves as a release key for the area designation area. Two modes can be selected for area designation: original priority (the size of the designated area is variable depending on the magnification ratio) and cassette priority (the size of the designated area is constant regardless of the magnification ratio). Reference numeral 137 indicates an X/Y key, which is a data input key when inputting area designation using the numeric keys.

Reference numeral 138 is an in/out key, which is a selection key for selecting whether to develop the inside of the designated area or only the outside.

Reference numeral 139 is a modification key, which is a data recall key for calling and modifying a set area value.

Reference numeral 140 is an automatic switching key for in/out area removal (in/out) and development color in multiple copying, and when this mode is selected in multiple copying, the A and B copies are Automatically in/o
u t , the color is switched.

141 is a color automatic switching key for page continuous copying;
As mentioned above, it has a function of automatically switching the developing color for A copy and B copy, and when the key 141 is pressed, the display 170
lights up.

Each of the LEDs 157 to 171 is a selection mode display group indicating that each mode is selected.

172 to 174 are display sections indicating the number of set areas; in this copying apparatus, up to 3 (1) areas can be set; 175 and 176 are display sections indicating inner/outer exclusion; The mode set with the key 138 lights up.The LED group 177 has the value of the set area X m i
n.

This is an indicator that indicates which one is Xmax, Ymin, or Ymax.

X42 is an area designation key by COD, and by pressing this switch, the optical system starts scanning and executes only the function of recognizing the area drawn on the document.

143 and 144 are a sort key and a collate key, respectively.

Reference numerals 178 and 179 are indicators for indicating sort and collate modes, respectively.

FIG. 11 is a basic block diagram showing the configuration of the display unit.

The CPU 201 is a microcomputer that controls each display, and controls the display elements, and the display contents are based on display (communication) data from the main body CPU.

206 is a fluorescent display tube with 40 characters of 5×7 dots.

7 bits x 5 bytes (7) data is required to constitute one character, and according to instructions from the CPU 201, 35 bits of data are sequentially read from the character generator 203, transferred to the shift register latch driver 204, and transferred to the shift register latch driver. -204, 5 bytes
Data of e minutes, that is, 35 bits, is latched. After this, the shift register latch driver 205 drives a digit signal that determines the timing to display one character, and one character is displayed. In this way, each character is dynamically lit, and the duty ratio is l/4.
It becomes slightly less than 0 (due to blanking time).

In addition, 208 indicates other LED MATRIX of the display section.
It is driven by dynamic lighting.

FIG. 12 is a block diagram of the vicinity of the input section of the CPU 301 that controls the main body. The matrix 302 is a group of switches provided for each input key, and is dynamically processed by the main body CPU 301 using well-known technology to determine which key has been pressed.

A digitizer 304 is configured so that the control circuit 305 detects the x and y coordinates of the location suppressed by the light pen.

306 is a coordinate input trigger signal switch provided on the pen, and in synchronization with the trigger edge of this signal, the main body CPU
301 reads the coordinates of the pressed part.

FIG. 13 is a driving block diagram of an LED array that displays a designated area provided in a glass frame for one document.

309 and 310 are LED arrays installed in the X and Y directions along the glass frame, respectively.

It is controlled by the CPU 301 to dynamically light up.

Fig. 14 shows this situation. If you now specify the outside of the shaded area in the figure, the LEDs indicating the X coordinate and X coordinate corresponding to the area where the image will be formed will light up (in the figure). L.E.
D (shaded area).

Moreover, if the inside cutout is specified, only the LEDs in the shaded area are turned off, and the other LEDs are turned on.

In addition, conversely, the LED of the part of the specified area where the image is not formed
may be displayed.

FIG. 15 shows a color detection circuit of the developing device.

Projection portion 3 provided on each developer unit 311, 312
Color detection switch 313, 3 by 11-1, 312-1
Close 14. CPU301 turns ON1 the color detection switch
The color of the set developing device is determined based on the 0FF state.

That is, each developer has its own switch pattern for each color, and as shown in FIG. 1, if three switches are used for color detection, it is possible to discriminate between 23-1=7 types of colors.

Next, consider setting an area.

When the area designation key 136 in FIG.
The flashing indicates which one is currently selected, and you can also change the mode by pressing "1" or "2" on the numeric keypad. This series of displays and operations is 136
Executes only while the key is held down.

Here, the case where the document-based area specification mode is selected will also be explained. In this mode, if you specify an area on the X-axis (sub-scanning direction) and Y-axis (main-scanning direction) from the coordinate origin determined for the original, the specified area will also be automatically copied even if you make a variable size copy. The magnification is changed.

X min coordinates using the numeric keypad and X/Y keys,
X m a X coordinate, Y m i n coordinate, Yma
Specifically, specify the points in the order of the x coordinate to complete the specification of the l area.

“X/Y”, Xmin, “X/Y”, Xm
ax.

“X/Y”, Ym in, “X/Y”, Ym
ax.

Input in the order of “X/Y”. Note that each coordinate is set in mm units.

When the “X/Y” key is input after setting the numerical value, 17
The 7 LED groups light up in sequence, allowing the user to confirm that the coordinates of each point have been input. Also, when entering each coordinate, the message display will display "Area 1: Xm1n (to)...00
Since the settings are performed interactively such as "0mm", even a user using the device for the first time can easily set the settings.

In this way, when you finish setting one area with 4 points, 17
LED 2 lights up to indicate that one area has been set. Further, the external extraction mode is automatically selected and the display 175 lights up. In/out here
With the key 138, it is possible to change to the inner extraction mode.

Further, the area designation can also be set using a touch panel using a group of transparent electrode switches on the document table 251.

In this case, place the original face up on the original table. However, the reference point at this time is in front of the left side of the document table, which is different from the reference point when actually making a copy (the back left side). In this state, the pressing pen 252 presses two diagonal points of a designated area (limited to a rectangle) on the document. At this time, the input switch 253 is pressed while being pressed with the suppression pen.The coordinate input by the input switch 253 is the edge force at the moment of pressing or releasing. No coordinates are entered.

Here, when specifying coordinates with a pen, pressing l simultaneously specifies two coordinates, X and Y, so the 172 LED groups light up two points at the same time. In addition, the input coordinates are numerically displayed on the message display section at the same time as they are input, so they can be visually confirmed. As described above, depending on the transparent digitizer input method, an area can be set by specifying only two points on a diagonal line.

Next, area specification using COD will be explained.

First, a document for which an area is to be specified is set on a document table and copied using a color developer (other than black). On the copied paper, a desired area is marked with a dark frame using a marker pen or the like. The reason why one color was developed here is that in order to create a difference in color density with this magic pen, it is preferable to develop the color so thinly that the desired area can be seen. If you set the original (including transparent sheets, thin paper, etc.) marked with zero-order markings (including transparent sheets, thin paper, etc.) on the original table again, and press the area detection key 142, the optical system will be activated. Scanning is started, and the marked area on the document is recognized by the COD provided on the optical path. Here, the area detection assumes that only one location can be recognized in one scan. Additionally, the coordinates of the recognized area are displayed on the message display so that the area can be confirmed.

The area can be specified using the three input methods described above, numeric keypad, touch panel, and COD, and up to three areas can be specified by freely combining these methods.

It is also possible to store an area in a specified state using the function key 1ooa-e.

Further, the input area can be visually confirmed not only by the message display but also by the LED array 4 provided along the X-axis and the Y-axis of the document platen glass l.

In this confirmation, the area is selected using the correction key 139, that is, pressing the correction key 139 once selects the first area, pressing it once again selects the second area, pressing it once again selects the third area, If you press it one more time, it will no longer specify the area. Pressing it again selects the first area again. Further X/
By selecting each x and y coordinate using the Y key 137, the corresponding coordinates can be sequentially called up on the message display, and in this state, it is also possible to modify the set area using the numeric keypad. Of course, numerical values input and set using a transparent digitizer (touch panel), COD, etc. can also be corrected using the numeric keypad.

Furthermore, by selecting an area using the modify key and pressing the clear key 111, it is also possible to erase only a specific area.

Once the area is set and the inner and outer edges are set in this manner, the erase means erases the inside or outside of the area during the copying process, making it possible to obtain a desired female copy.

Further, it is also possible to designate an area by making it possible to specify 0N10FF of the LED array using the operation section and lighting up the LEDs in a desired range.

When the CPU recognizes the coordinates of the area, it moves in the sub-scanning direction (X direction)
For X min of the image formed on the drum
- Turn on the blank exposure lamp (LED array) in the range corresponding to X m a x (inner removal) or turn it off (outer removal)
However, in the main scanning direction (Y direction), the area is removed by turning on (inner removal) or extinguishing (outer removal) the LED array in the range corresponding to Ymin to Ymax of the image formed on the drum. Or get an excerpt copy.

FIG. 9-2 is a diagram showing the document placement table.

A command section 320 is provided on the front side of the digitizer 304 formed of transparent electrodes, and a command is selected by pressing it with a pen in the same way as inputting coordinates when specifying an area. In this case, the coordinates pressed with the pen are read, and if the read coordinates are the document placement area, it is determined to be an area specification or magnification specification, and if the read coordinates are the command area,
Select the command corresponding to that coordinate.

Here, 321 is a command to copy the inside of the specified area in black, 322 is a command to copy the inside of the specified area in color (for example, red), 323 is a command to copy the outside of the specified area in black, and 324 is a command to copy the inside of the specified area in black. A command 325 is a command to copy the outside in color, and a command 325 is a command to clear coordinates input with a pen. In this way, the area and color can be specified using the digitizer.

It goes without saying that the digitizer need not be provided on the document placement glass, but may be provided on the front side of the document cover, or may be separated from the main device.

Digitizers can be based on various principles such as resistance value detection, capacitance detection, position detection using strain wheel detection, and position detection using light.

This copying apparatus has a document size detection means using a C0D 18, a cassette size input means, and a zoom lens 16 for stepless magnification, thereby realizing AMS and APS.

When the copy key 117 is pressed, the optical system performs prescanning, inputs the original image at this time into the COD, and detects the original size. For this reason.

The pressure plate 90 has a mirror surface and provides a density difference with the original so that the COD can correctly detect the original size. Here, the erase means prevents toner from being deposited on the mirror surface portion and forming a visible image. Furthermore, some documents may be detected as missing due to their high density. Therefore, once it is detected that there is no document, the lighting voltage 9 judgment reference level etc. are changed and pre-scanning is performed again to detect the document size.

Furthermore, if the detected document setting position is more than a certain distance from the reference point, a message display warns that the document placement position is defective, and execution of the subsequent copy sequence is stopped. Similarly, when the CCD 18 detects that the original is placed diagonally, a warning is displayed and the apparatus stops. Incidentally, the slanted placement of the original is detected from the coordinates of the corners of the original and the inclination of the original etch.

However, since the user may intentionally place the device in this way, the warning cancellation switch (not shown)
If the warning cancellation mode is selected, the copy sequence is executed even in the above-mentioned case. However, in this case, AMS and APS can be executed by determining the X and Y coordinates of the farthest point from the reference point as the document size. Of course, an erase means is required for the portion determined to be outside the document.

Furthermore, if there is only a shift in the Y axis (optical system scan direction), it is not possible to automatically perform image shift and adjust the scan timing and paper conveyance timing to obtain a proper image.

Furthermore, even if there is a warning, it may be possible to ignore the warning and copy by pressing the copy key again.

If either the 1-selection cassette size or the copy magnification is specified for the detected original size as described above,
The other can be automatically calculated and determined (AMS
, APS).

Here, the paper size calculated from the original size and magnification is not necessarily a standard size, so in this calculation, the first condition is to use the minimum cassette size that includes this calculated paper size. , In order to prevent the detection error from interpreting the size as being larger than the - circumference,
During the calculation process, the document size is adjusted to be smaller (with some leeway) in small increments. Specifically,
Both x and y have a margin of several mm.

On the other hand, the appropriate magnification is determined by the original size and cassette size, but in general, changing the magnification from standard size to standard size (such as changing the size)
Therefore, if the detected document size matches or is approximately equal to the standard size, it will be given priority over the accurately calculated magnification.

It is also possible to select a specific magnification between these fixed forms and fixed forms.

Furthermore, although it is a cassette size, in addition to the standard size prepared by the manufacturer, there are many cases in which special sizes are frequently used by the user or the empire. AMS, APS
In order to execute this, the x and 7 dimensions can also be registered for these universal cassettes. As with the area specification, there are three possible setting methods.

First, enter the asterisk (tree) mode to wait for input. At this time, an interactive message indicating one dimension is displayed on the message display.

'1 Uni8 monkey 1: X (vertical): mm.

Y (horizontal): mm” In the initial state where nothing is specified here, the maximum paper size such as LGR is set for A3.

In this state, enter the dimensions in the X and Y directions in mm using the numeric keys. Also, set the document on the document table 251 and set the paper size using transparent electrodes, or detect the paper size by COD scanning.

It is also possible to register. COD scanning is performed by the area detection key (142) mentioned above. These detections and registrations are valid only in the universal cassette registration mode among the asterisk (*) modes.

In this way, APS and AMS of non-standard original size, non-standard cassette size, and arbitrary magnification can be executed.

On the other hand, a zero copying apparatus having an area specification function can also perform AMS or APS based on the size of the specified area and the cassette size or magnification, rather than the original size.

Next, the magnification setting method will be described.

In this copying apparatus, fixed magnification selection keys 122.12
3. In addition to setting the magnification using the arbitrary magnification (zoom) selection key 125, automatic magnification selection key 124, etc., the magnification can also be set using a transparent digitizer on the document table. In this case as well, the magnification can be set by selecting the magnification setting mode using the asterisk (tree) mode and specifying two points on the digitizer on the document table. That is, a magnification is set according to the ratio of the distance fi from the point of the first press to the document reference point: the distance fi from the point of the second press to the document reference point.

If you specify a point farther than the first press with the second press, it will be enlarged.
You can get a reduced image by specifying a nearby point.

This instruction will also be displayed on the message display.

” 1 push: 2 push= mm:
mm-→---%'" It is also possible to determine the magnification by substituting binary values in the same way using the numeric keypad. By using these two methods of determining the magnification, the calculated magnification can be With a copying machine, it is possible to obtain the desired magnification by repeating up to two consecutive copies, so if it is not possible with just the first copy, two copies can be made at the same time. The configuration is such that the second copy magnification can be specified as follows.

“000% 1st:○OO%, 2nd:○○○%”1
After making the first copy, set the scaled image on the document table, input the displayed magnification, and make another copy to obtain a copy with the desired magnification.

Therefore, in this apparatus having a copying magnification of 50% to 150%, it is possible to specify a magnification of 25% to 225%.

Incidentally, after the first copy, the second magnification may be automatically set.

Further, the copy magnification can be determined by combining digitizer input and document detection by CCD. In other words, use the pen to specify the position corresponding to the size you want to enlarge or reduce with the digitizer, then set the original, detect the original size during prescanning, and determine the copy magnification based on the ratio of the two sizes. good.

FIG. 16 is a flowchart for determining the copy magnification using a digitizer or numeric keypad. First, the first
For example, enter the coordinates corresponding to the size of the document using a light pen or numeric keypad.
For example, input the coordinates corresponding to the desired copy size (step 2). Input the coordinates by specifying a point diagonally opposite to the adult fish on the platen glass. In addition, when inputting with the numeric keypad, only the X or Y coordinate is sufficient, and the copy magnification is calculated from the input coordinate 2 / coordinate 1 (
In step 3), it is determined whether the calculated copying magnification is within the variable magnification range of the apparatus (step 4).

If it is within the range, the magnification is displayed (step 8). If it is outside the range, find the square root of the calculated magnification to check whether it can be copied twice (step 5), and check whether the value is within the range that can be scaled (step 6) ,
If it is within the range, the calculated square root value is used as the copying magnification and the first and second copying magnifications are displayed (step 9).

If it is outside the range, a warning is displayed to that effect (step 10).

If the first and second copy magnifications are the same, that is, the square root of the desired magnification, the second magnification setting becomes unnecessary.

In addition, the first and second copying magnifications do not need to be calculated using the square root, but the first copying magnification is the first copying magnification that is possible in one copying, and the first copying magnification is the first calculated copying magnification. The value divided by may be used as the second copying magnification, so there are many combinations. Also.

It is clear that a wider range of magnifications can be obtained by making 3rd or 4th copies, unless image quality is taken into account.

Next, we will explain the control of copying operations, focusing on functions such as page quick copying, multiple copying, and area specification, in Figures 16-2 and 1.
This will be explained using the flowchart shown in Figure 6-3. In step 11, it is determined whether the copy start key is turned on, and if it is turned on, the copy routine is executed (step 12).

The copy routine shown in FIG. 16-3 will now be explained. First, determine the copy magnification and copy density, and then
Adjust the developing bias, etc. (steps 30 and 31), and determine whether or not the color selection, i.e., color copy mode is selected (step 32); if not, select the black developer (step 33). , if it is in color mode, select a color developer (step 3)
4), and step 3 to determine whether there is an area specification.
5) If there is an area specification, it is determined whether or not it is based on the cassette when the magnification is changed.Step 36) If it is not the cassette standard, it will be the original standard, and the area itself will be scaled according to the magnification ratio. The area obtained by multiplying the setting area by the copy magnification determined in step 30 is set as the setting area (step 37
), therefore, when cutting out the inside or outside of the area,
All you have to do is turn on the blanking LED corresponding to this new area, and then check which mode the I/O key is in, i.e. whether it is inside or outside the area. 38), in
In step 39), set a flag to control the blank exposure lamp and erase the outside of the area.
If you are in t mode, set a flag to erase the inside (
Step 40).

Also, if there is no area specified, the above control will not be performed, and it will be determined whether or not the page continuous copying mode is set (step 41). If it is page continuous copying, A copy ( In step 42), A.
If it is a copy, set the flag to perform an A scan (scan the left half of the document placed on the document table); if not an A copy, perform a B scan (scan the right half of the document). If it is not continuous page copying, scanning is performed according to the size of the document, and exposure, development, and transfer are performed according to the conditions determined by the above judgment.

A copying process such as fixing is executed (step 45).

The above is an explanation of the copy routine. Returning to FIG. 16-2 again, it is determined in step 12-1 whether or not it is a double-sided copy, and if it is a double-sided copy, the copy is stored in the intermediate tray with the copied side facing up (step 12-2). If not, it is determined in step 13 whether there is multiple copying.

If it is not a multiple copy, the paper is ejected to the output tray (Step 14), and if it is a multiple copy, the paper is stored in the intermediate tray with the copied side facing down (Step 15), and the mode is set to automatic color and area conversion. Whether or not it is, that is,
In the first and second copying, it is determined whether or not the key 140 or 41 for automatic conversion of one color is pressed, and if the automatic conversion mode is set. The color and the inner and outer edges of the area are converted (step 17).

Then, it is determined whether the page snapshot mode is set (step 18), and if the page snapshot %-F is not set, wait for manual copy start key input (step 20).
), if the page snapshot mode is selected, the copy routine is executed again (step 21).

FIG. 16-4 shows an example of a case where an area is specified and a variable size copy is made without outside.

(a) represents the original, and the dashed line 350 represents the specified area. When scaling is done based on the original, the area is also scaled as shown in (b), and the image fits within the scaled area without being missing. . However, when copying with variable size based on the cassette standard (C)
As shown in the figure, since only the image is scaled and not the area, part of the image may be missing.

Next, color conversion in double-sided copying in page quick copy mode will be explained. Place two originals (A4 size or smaller) on the original table and press the page continuous copy/double-sided copy selection key 133.
When the automatic color switching key 141 is pressed, a mode is set in which pages are continuously copied and each page is changed in color and double-sided copying is performed. When the copy start key 151 is pressed in this mode, only the original placed on the left side is scanned, copied onto the front surface of the recording paper, and stored in the intermediate tray. Incidentally, at this time, the cutter 41 is set on the upper side, and the recording paper is stored in the intermediate tray with the copied side facing up. The developer is then automatically replaced to change the color, and the next document is scanned. At this time, the blank exposure lamp lights up while the first document is being scanned, and no latent image is formed on the first document.The recording paper stored in the intermediate tray is fed to the position of the registration roller, and two sheets are The recording paper is sent to the drum at the timing when the leading edge of the latent image on the original document coincides with the leading edge of the recording paper. Note that when forming a binding margin, the timing may be accelerated or delayed accordingly. The right original image is then copied onto the back side of the recording paper and ejected to the outside of the machine. In this way, a double-sided copy with different colors on the front and back sides can be obtained.

Note that if the switching device 41 is set on the lower side, the recording paper is stored in the intermediate tray with the copied side facing down, so multiple copies can be obtained with the original on the left and the original on the right in different colors. .

Furthermore, when performing double-sided copying or multiple copying, it is also possible to specify an area and copy.

Furthermore, single-color conversion is possible even when not in the page snapshot mode, and in the multiplex mode or double-sided mode, the developing device is automatically replaced after the first scan, and the second scan is timed.

(Operation of CCD) FIG. 17 is a circuit block diagram of this embodiment.
is a control microcomputer, 18 is a CCD image sensor, 401 is an A/D converter, and 402 is a CC
This is a D-drive Hals generation circuit. 403 is a copy start signal from an external circuit; 404 is a document/area mode switching signal from an external circuit; 405 is a home position signal from the optical home position sensor 15;
406 is the image tip signal from the image tip sensor 30, and 407
is the shift pulse signal of the COD image φ sensor 18,
408 is the reference clock signal φ, 409 is the transfer lock signal φl of the CCD image sensor 18, 410 is the transfer lock signal φ2, 411 is the reset fist pulse R5 of the CCD image sensor 18, and 412 is the CCD image sensor 18. 18 output signal CCD OUT, 413
is the clock signal A/D C of the A/D converter 401
LK, 414 is the output A of the CCD image sensor 18
This is the digital signal DATA after /D conversion.

14 is a lamp for document illumination, 415 is a lamp dimming circuit,
416 is a lamp on/off signal, and 417 is dimming data.

The dimming circuit 415 is configured to apply a voltage proportionally corresponding to the value of the dimming data 417 to the lamp 14 .

To briefly explain the operation, first, microcomputer 4
When a copy start signal 403 is applied to 00 from the outside, a program for document detection and area recognition, which will be described later, is read from a ROM (not shown) and starts running.

First, the microcomputer 400 uses a built-in timer function to output a reference clock signal φ408 and an A/D converter φ clock signal A/DCLK413 to the pulse generator 402) and A/D converter 401, respectively.

From the reference clock signal φ408, the COD drive pulse generation circuit 402 generates transfer locks φ1409 and φ2410, and a reset write pulse R3411. The output signal CCD of the CCD image sensor 18 driven by these clock pulses is
0UT412 is converted by A/D converter 401.
A/D conversion is performed, and the digital output DATA 414 is read from the input port of the microcomputer 400. The document/area mode switching signal 404, home and position signals 405, and image tip signal 40B will be described in the explanation of the flowcharts to be described later.

Further, when dimming for the COD image sensor 18 is required, the dimming circuit 415 turns on the lamp 14 in response to a lamp on/off signal 416. Microcomputer 400 is CO
A/D conversion value DA of the output signal of the D-image fist sensor 18
While looking at TA414, go to dimming data CVRDAT4
17, the lamp 14 is dimmed to an appropriate brightness, and the value of the dimming data 417 at that time is stored.

Furthermore, when performing AE, the lighting voltage of the lamp 14 is controlled by changing the value of dimming data 417 using AE data, which will be described later, so as to obtain appropriate exposure.

FIG. 18 shows shift-pulse 5h420. Transfer lock φ
1-421, φ2・422 and.

Reset pulse R3 and CCD output signal CCD
0UT424, A/D converter clock AD
CLK425. A/D converter output DATA42
The 0 interrupt program, which is a timing diagram showing the phase relationship between B and interrupt timing 427, will be described later.

FIG. 19 is a diagram showing the relationship between CVRDATA and lamp lighting voltage.

FIG. 20 is a simple principle diagram of the document detection method. 40
3 is the COD image fist sensor shift φ pass/l/pass signal 5h407.431! The output signal CCD0UT412.432 of the fccD image sensor is the threshold level, 91 is the standard white board, 93 is the document placement reference position, 15 is the optical system home fist position sensor, 3o is the tip sensor, 12 is the document table, 435 is the original, and 436 is the CCD image. This is the position where the output of the sensor is processed by the microcomputer 400.

This is to process all the output data of the CCD image sensor in each line as shown in the figure. Shifting the processing position every line is a means to prevent the detection accuracy from deteriorating as much as possible.

FIG. 21 is a conceptual diagram of area designation by marking.

441 is an original manuscript, and 422 was created from the original manuscript. Dummy m-copy, 433t- marked as dummy copy, 444.445 is the resulting copy.

To explain the procedure, first set the original document 441 on the document table, perform the copying operation in the dummy copy mode, and make a thin dummy copy 4 with colored toner such as red.
Get 22.

For this dummy copy 422, specify the area you want to specify by 4
Mark with a black marker as shown in step 43. Place the marked dummy copy on the platen, and perform optical a (7) scanning in area recognition mode to detect the marked area. Once the original document 441 is set on the document table and copies are made by specifying the inside and outside of the area, copies such as 444 and 445 can be obtained.

Reference numeral 446 indicates the name of each part when a marked original is processed by the original detection and area recognition program described later, and 451 to 456 are referred to as stages 1 to 6, respectively.

FIG. 22 shows the main flow of the document detection and area recognition program. This program will be executed when the need for document detection or area recognition occurs during the copy sequence.

This flowchart will be explained according to FIG. 0, in which the entire control program is set. First, when the need for document detection or area recognition as described above occurs, the program according to this flowchart is executed from step 1. In step 2, first, various counters (clock counter, line counter) etc. on the RAM are initialized.Next, in step 3, in order to generate various pulses to drive the COD image sensor, the reference clock Φ408 and A /D converter clock e-pulse A/DCLK413, 2 in this embodiment.
Microcomputer 4
00 is oscillated by the built-in timer function (with interrupt function) Next, in step 4, wait for the optical system home position signal 405, and if the signal is detected, proceed to step 5 and wait for the image tip signal 406. . If the image tip signal 406 is detected, in step 6 the interrupt permission state is set. Then, in step 7, the process waits until the document or area detection completion flag is set. If it is set, the program is exited from step 8 and continued with another program.

FIG. 23 shows a part of the interrupt routine of the document detection and area recognition program, and the flow is executed at the timing shown in FIG. 18. When a 0 interrupt occurs, step 9 enters the main flow. , in step IO, a clock counter that counts the number of output data for each column outputted in time series from the COD image sensor is counted up.

Then, in step 10, it is determined whether it is the timing to output the shift pulse 407 based on the value of the clock counter. If the timing is right, the process jumps to the sh routine as shown in step 22. If not, the process jumps to step 1.
In step 2, it is determined based on the flag whether or not the program currently being executed has multiple interrupts. If there are multiple interrupts, jump to step 21 and extract them from the interrupt program. If not, go to step 13 and check whether it is the data read position (timing) using the sample point value and the clock write counter value. Judgment is made by comparison (whether they match or not). If the sample point value and the clock counter value are different, the process jumps to step 21 and is extracted from the interrupt program. If they match, it is determined that the reading position is reached, and the process proceeds to step 14, where the original/area signal 404 is used. ,
Decide on the mode. If the area detection mode is selected, the process jumps to the area detection mode routine as shown in step 23. If the document detection mode is selected, the process proceeds to step 15, where the A/D conversion value of the COD image sensor output and the set threshold φ level are calculated. By comparing the values, the document table 1 indicated by the current line counter and clock counter values.
Determine whether there is a document at the position above 2. If there is no document, the process jumps to step 18, and if there is a document, the process proceeds to step 16. In step 16, the value of the clock counter is stored in the buffer as Xmaxl. This value is updated every time there is a document in one line, and finally, the value of the clock counter at the time of the data for which it was determined that there was a document last among the data in that line is Everything will be stored for each line.

Next, in step 17, for all the lines processed so far, the maximum value, minimum value Xmax, Xm1n of the clock counter value when it is determined that there is a document, and the maximum value of the line counter value, Minimum value, Ymax, Ym
Compare i n with the current clock counter and line counter values, and update if necessary.

Next, in step 18, the A/D converted value of the COD image sensor output is stored in a buffer for one line. In step 19, it is determined based on the value of the clock counter whether data processing for one line has been completed, and if it has not been completed, the sample e point, which is the collection position of AE data, is updated in step 20, and then step 21 is performed. If the interrupt program has been completed, in step 24, it is determined that there is a document from the first data of the A/D conversion values of the COD image sensor output for one line that is determined to be present. AE data counters corresponding to the maximum and minimum values of the data up to the last data are counted up. However, when an area for AE data collection is set, the AE data counter is counted up only within that area.

The AE data counter is prepared for all possible values, including the maximum value and minimum value of each line, and serves as data for performing AE.Next, in step 25, the value of Xmaxl is calculated. It is stored in a RAM specific to this line so that it will not be updated in the next line processing. Then, from step 21, the interrupt program is extracted.

24 is a part of the interrupt routine of the document detection and area recognition program. If it is the area detection mode in step 14 of FIG. 23, the process jumps to step 26 of this figure as shown in step 23. In step 27, it is determined by the flag whether it is the first stage in FIG.
If it is the first stage, jump to the 5EQI routine as shown in step 35, similarly step 28, step 29. Step 30. 21 in FIG. 21, respectively. 3rd゜4th. If it is 5th stage or not, judge based on the flag and if YES, step 36. Step 37
, step 38. 5EQ2.5E as in step 39
Q3. Jump to 5EQ4, 5EQ5 routine, if NO, proceed to next.

In step 32, it is determined whether data processing for one line has been completed based on the value of the clock counter,
If it has been completed, the process jumps to step 34 and exits from the interrupt program; if it has not finished, the sample point is updated in step 33, and then the process proceeds to step 34, where the interrupt program is extracted.

FIG. 25 is a part of the interrupt routine of the document detection and castle recognition program. Figure 24 Step 27. Step 28. Step 29゜Step 30. From step 31, step 41 of this figure. Step 45. Step 49
．． Step 54. Jump to step 58.

Jumping to step 41, in step 42 C
The A/D conversion value of the OD image sensor output is compared with the set threshold e-level value to determine whether the original is at the position on the original platen 12 indicated by the current values of the line e counter and clock counter. to decide. If there is no document, the process jumps to step 44 and then to step 40 in FIG. 24. If there is a document, the process jumps from step 44 to step 40 in FIG. 24 as a second flag in step 43.

Jumping to step 45, in step 46 C
The A/D conversion value of the OD image sensor output is compared with the value of the set threshold Φ level, and it is determined whether the level is black. If it is not at the level of black spots, the process jumps from step 48 to step 40 in FIG. If it jumps, it is similarly determined in step 50 whether there is a manuscript, and if there is no manuscript, the process jumps to step 53 and the 24th
Jump to step 40 in the figure, if there is a manuscript, step 5
Proceed to 0, Xm1n, Xmax, Ymin.

Y m a x value and current line fist counter.

The value of the clock counter is compared and updated. Next, in step 52, the flag is set to the fourth stage, and the process jumps from step 53 to step 40 in FIG.

When the process jumps to step 54, it is similarly determined in step 55 whether the level of the black area is high, and if the level of the black area is not, the process jumps from step 57 to step 40 in FIG.
If it is Kurowakuken level, set the flag to 5th in step 56.
After setting the step, the process passes through step 57 and jumps to step 40 in FIG.

When the process jumps to step 58, it is determined in step 59 whether or not there is a similar document, and if there is no document, step 6
2, and then jump to step 40 in Figure 24. If there is a manuscript, in step 60, set Xm1n, Xmax, Ymin.
, Ym a x is the current line fist counter, clock
Compare with counter value and update. and step 61
Set the flag to the 6th stage in step 6
2 to step 40 of FIG.

FIG. 26 is a part of the interrupt routine of the document detection and area recognition program. If it is determined in step 11 of FIG. 23 that it is time to issue a shift pulse (407), the process jumps to step 33 of the figure as shown in step 22. Then, in step 64, a shift pulse 407 is outputted at the timing shown in FIG. In step 65, the line counter is counted up, and in step 66, it is determined from the value of the line counter whether the last line to be processed has been completed, and if it has been completed, the process advances to step 67 and the shift pulse 407 is The output of
AE data is created in step 72, and the interrupt program is extracted in step 72.If it is determined in step 66 that the program has not been completed, the process proceeds to step 70, where the values of the sample φ point and 1 line end are set, and the process is performed in step 72. In step 71, counters and the like are initialized, and the interrupt program exits from step 72.

FIG. 27 shows the main flow of the document detection and area recognition program when using the page φ memory. The entire control program is set up so that when the need for document detection or area recognition arises during the flow of the copying sequence, this flowchart will be explained according to Figure 0. When the need for detection or area recognition arises, a program according to this flowchart is executed from step l. In step 2, various counters (clock counter, line counter), etc. on the RAM are initialized.Next, in step 3, in order to generate various pulses to drive the COD image sensor, the reference clock φ408, In this embodiment, the clock pulse A/D CLK413 of the A/D converter is output.
Microcomputer 4
06 Oscillated by the built-in timer function (with interrupt function) Next, wait for the optical system home position signal 405 in step 4, and if the signal is detected, proceed to step 5 and wait for the image tip signal 406. If the 0-picture ahead signal 405 is detected, in step 6, the interrupt is enabled. Then, in step 7, the process waits until the document or area detection end flag is set.

If set, the COD output data on the page memory is read in order in step 8, and it is determined in step 9 whether or not it is in area A (Fig. 21), and if so, in step 10, the data in area A is corresponded to. AE to do
The data counter is counted up, and if it is not area A, the AE data counter corresponding to the data in area B (FIG. 21) is counted up in step 13. Then, in step 11, steps 8 to 11 are repeated until processing is completed for all data,
When the process is completed, the extraction is performed from step 12 and the program ends.

FIG. 28 shows a part of the interrupt routine of the document detection and area recognition program, and the flow is executed at the timing shown in FIG. 18. When a 0 interrupt occurs, the main flow is entered from step 14. In step 15, a clock is used to count the number of output data for each column that is output in time series from the COD image sensor.
Count up the counter. and step 16
, it is judged from the value of the clock counter whether it is the timing to output the shift Φ pulse 407, and if the timing is right, the process jumps to the sh line as shown in step 27. If not, the current execution is performed in step 17. The flag determines whether the program inside has multiple interrupts. If there are multiple interrupts, jump to step 26 to remove them from the interrupt program; otherwise, go to step 1.
Proceeding to step 8, it is determined whether or not it is the data reading position by comparing the value of the sample point and the value of the clock counter. If the sample point value and the clock counter value are different, the process jumps to step 26 and is extracted from the interrupt program. If they match, the reading position is determined and the process proceeds to step 19, where the document/area signal 404 is extracted. The mode is determined based on this. If in area detection mode.

Jump to the area detection mode routine as shown in step 28. If the document detection mode is selected, proceed to step 20 and C
By comparing the A/D conversion value of the OD image sensor output and the certified threshold level value, the current line
It is detected whether the original is at the position on the original platen 12 indicated by the values of the counter and the clock counter.

If there is no original, the process jumps to step 23, and if there is a original, the process goes to step 21.

In step 21, the value of the clock counter is
Store it in the buffer as m a x 1.

This value is updated every time there is a document in one line, and finally, the clock counter value at the time of the last data judged to have a document among the data in that line is the value for each line. Everything will be memorized.

Next, in step z2, for all the lines processed so far, the maximum value of the clock counter value, the minimum value XmaX, Xm1n, and the maximum value of the line counter value when it is determined that there is a document, Minimum value, Ymax, Ym
Compare in with the current clock counter and line counter values and update if necessary.

Next, in step 23, the A/D converted value of the CCD image sensor output is stored in a buffer for one page. In step 24, it is determined based on the value of the clock counter whether data processing for one line has been completed, and if it has not been completed, the sample point is updated in step 25, and then the interrupt program is exited through step 26. If the output has been completed, in step 29, the last data of the A/D conversion values of the COD image sensor output for 1 line, which is determined as having a document, is
The value of a x 1 is stored in a RAM specific to this line so that it will not be updated in the next line processing. Then, from step 26, the interrupt program is extracted.

FIG. 29 is a part of the interrupt routine of the document detection and area recognition program. If it is the area detection mode in step 19 of FIG. 28, the process jumps to step 30 of this figure as shown in step 28.
It is determined by the flag whether it is the first stage in the figure.

If it is the first stage, jump to the 5EQI routine as shown in step 39, similarly step 32) step 33. In steps 34 and 35, the steps 2 and 3 in FIG. 4th. Determine whether it is the fifth stage based on the flag, and if YES in each case, step 40. Step 4
1. Step 42. 5EQ2.5E like step 43
Q3. Jump to the 5EQ4, 5EQ5 routine, and if NO, proceed to the next step.

In step 36, it is determined whether 1947 minutes of data processing has been completed based on the value of the clock counter,
If it has been completed, the process jumps to step 38 and exits from the interrupt program; if it has not finished, the sample point is updated in step 37, and then the process advances to step 38 to exit from the interrupt program.

FIG. 30 is a part of the interrupt routine of the document detection and area recognition program. Figure 29 Step 39. Step 40. Stella 7'41° Step 42. Step 43
Accordingly, step 45. of this figure. Step 49. Step 5
3. Step 58. Jump to step 62.

Jumping to step 45, in step 46 C
OD image sensor output (7) Compares the A/D conversion value and the set threshold e level value, and displays the original platen 1 indicated by the current line counter and clock counter values.
Determine whether there is a document at the position above 2. If there is no document, the process jumps to step 48 and then to step 44 in FIG. 29. If there is a document, the flag is set to the second stage in step 47, and the process jumps from step 48 to step 44 in FIG.

Jumping to step 49, in step 50 C
The A/D conversion value of the OD image sensor output is compared with the set threshold level value, and it is determined whether the level is black. If the level is not black, the process jumps from step 52 to step 44 in FIG. 29, and if the level is black, the flag is set to the third stage in step 51.

The process jumps from step 52 to step 44 in FIG.

When the process jumps to step 53, it is similarly determined in step 54 whether there is a document, and if there is no document, step 5
7 and then jump to step 44 in Figure 29. If there is a manuscript, proceed to step 55 and set Xm1n, Xmax, Ym
in.

Ymax value, current line counter, clock
The value of the counter is compared and updated. Next, in step 56, the flag is set to the fourth stage, and the process jumps from step 57 to step 44 in FIG.

When the process jumps to step 58, it is similarly determined in step 59 whether the level is a black spot, and if the level is not a black spot, the process jumps from step 61 to step 44 in FIG. 29. If the level is a black spot, the flag is set to After setting the level to 5, the process passes through step 61 and jumps to step 44 in FIG.

When the process jumps to step 62, it is similarly determined whether there is a document or not. If there is no document, the process jumps to step 66 and then to step 44 in FIG. 29. If there is a document, the process jumps to step 6.
4, Xmin, Xmax, Ymin,
Compare Ymax with the current line counter and clock counter values and update. Then, in step 65, the flag is set to the sixth stage, and then the process jumps to step 44 in FIG. 29 through step 66.

FIG. 31 is a part of the original detection and area new style program interrupt routine. If it is determined in step 16 of FIG. 28 that it is time to issue the shift pulse 407, the process jumps to step 67 of the figure as shown in step 27. Then, in step 68, the first
The shift 11 pulse 407 is output at the timing shown in FIG. In step 69, the line reference counter is counted up, and in step 70, it is judged from the value of the line counter whether the last line to be processed has been completed. If it has been completed, the process proceeds to step 74 and the shift pulse is Fix the output of 407 to high,
In step 72, interrupts are disabled and step 7
In step 3, AE data is created, and in step 76, the interrupt program is extracted.

If it is determined in step 70 that the process has not been completed, the process proceeds to step 74, where the values of the sample point and 1 line end are set, and the counters etc. are initialized in step 75, and the interrupt program exits from step 76.

FIG. 32 is a flowchart of the dimming program. When the sequence requires dimming for the CCD image Φ sensor, a program according to this flowchart is executed.

Start from step 1 and turn on the lamp in step 2.
The lamp is turned on by the off signal.

The dimming data at this time takes a preset value.

Next, in step 3, the reference clock φ 408, A/
The D converter clock, A/DCLK413, and shift pulse 5h407 are output, and the COD image
In the 0th order step 4 where the sensor is driven, the COD
DATA41 after A/D conversion of image sensor output
Determine whether the value of 4 is overflowing.

If overflow has occurred, proceed to step 5, count down the dimming data 417 by 1, and proceed to step 4.
This loop continues until there is no more overflow.

If no overflow is observed in step 4, the process proceeds to step 6, where the dimming data is counted up.Next, an overflow is checked in step 7, and the process returns to step 6 until an overflow occurs.

When overflow occurs, the process proceeds to step 8, where the dimming data is stored, and the dimming program is ended in step 9.

〔effect〕

As described above, according to the present invention, by displaying the copy area of the set area, the set area can be confirmed intuitively, and it is also possible to easily determine whether the area is inside or outside. Also, it is easy to see whether or not an area has been specified.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the configuration of an embodiment of a copying machine to which the present invention is applied, FIG. 2 is a block diagram of a circuit that determines process speed, FIG. 3 is a timing chart of the entire device, and FIG. Rotation timing chart, Figure 5 is potential control timing chart, Figure 6 is CCD dimming, CCD measurement timing chart, Figure 7 is scan timing chart, Figure 8 is post-rotation timing chart, Figure 9 is Fig. 1 is a perspective view showing an embodiment of a copying machine to which the present invention is applied, Fig. 9-2 is a main view of the document storage table, Fig. 10 is a main view of the operation unit, and Fig. 11 is a main view of the copying machine according to the present invention. FIG. 12 is a block diagram showing the configuration of the display section, and FIG. 12 is a block diagram of the input section. Figure 13 is a block diagram of the LED array drive circuit,
FIG. 4 is a diagram showing how the LED array is lit, FIG. 15 is a color detection circuit diagram of a developing device, FIGS. 16-1 to 16-3 are a flowchart showing an embodiment of the present invention, and FIG. 4
17 is a circuit block diagram of an embodiment of the present invention, FIG. 18 is a timing chart of control pulses, and FIG. 19 is a CV
Diagram showing the relationship between RDATA and lamp lighting voltage, No. 20
The figure is a diagram for explaining the document detection method, Figure 21 is a diagram for explaining area specification by marking, and Figures 22-
FIG. 31 is a sequence flowchart for document detection and area recognition, and FIG. 32 is a sequence flowchart for light adjustment. 1 is a photosensitive drum, 3 is a fixing device, 6 and 7 are developing devices, 8 is a φ tray, and 18 is a COD for detecting an original.

Claims (2)

[Claims] (1) Area specifying means for specifying an arbitrary area of a document; selection means for selecting the inside or outside of the area specified by the area specifying means in order to copy the inside or outside of the area; and the output of the selection means. and display means for displaying a copy area based on the specified area. (2) The copying apparatus according to claim 1, wherein the display means is a light emitting member provided vertically and horizontally along a document table glass frame.