JPS61205928A - Copying device - Google Patents

Abstract

PURPOSE:To determine a variable power in accordance with an actual sense, and to improve the operability by constituting a title device so that the copying magnification can be set from two areas which have been indicated by a digitizer for indicating an area related to copying. CONSTITUTION:A title copying device can set not only a magnification by fixed magnification selecting keys 122, 123, an optional magnification selecting key 125, an automatic magnification selecting key 124, etc., but also a magnification by using a transparent digitizer on an original platen 251. In this case, as well, the magnification can be set by selecting a magnification setting mode by an asterisk mode 114, and indicating two points by the digitizer on the original platen 251. That is to say, the magnification corresponding to a ratio of a distance extending from the point of the first push to the original reference point, and a distance extending from the point of the second push to the original reference point is set. If the point which is more distant than the first push is indicated by the second push, a magnified image is obtained, and if the near point is indicated, a reduced image can be obtained. In this way, the operability can be improved.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a copying apparatus having a digitizer.

[Prior art]

Conventionally, as means for inputting a copying magnification, there have been selection using a fixed magnification, input using a zoom key, and the like. However, in these methods, all magnifications are expressed as numerical values (ratios or percentages), so when scaling a document of a certain size to a certain desired size, the dimensions of both are measured and the ratio is calculated from those values. Therefore, it is possible to automate this calculation, but the trouble of measuring dimensions cannot be avoided.

〔the purpose〕

The present invention C1 has been developed in view of the above points, and an object of the present invention is to provide a copying apparatus that can easily determine the magnification ratio based on the concept of actual size using a digitizer.

〔Example〕

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

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, there is a device in which a pressure plate 90 is set instead of the RDF 9, and in each of these configuration diagrams, the surface of the drum 1 is made of a seamless photoreceptor made of ASI and is supported pivotably for one rotation. When the power is turned on by the power switch 2, the fuser 3 is heated, and when it reaches a predetermined temperature, the main motor 4 is turned on.
The drum 1, the conveying parts A, B, C and the fixing roller 5
starts 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 (pre-processing) and determining whether or not there is toner in the developing device 6. This is an expected 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 double-sided copy mode and single-sided copy mode, the intermediate tray 8 is used for copying.

Furthermore, by having a plurality of developing units 6 and 7, copies can be made on 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 (described later), set the number of copies, specify the black developer 6 among the developers, and then 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 COD for document detection (details will be described later). .

Next, the original lO 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
: By moving at a speed ratio of 1/2, the projection lens 16
, the document is scanned while the optical path length in front of the document detection lens 17 is always kept constant. In this way, the above-mentioned reflected light image is formed on the detection element COD 18 through the document detection lens 17, and also on the projection lens 16.
．． The image is formed on the drum via the third mirror 19 and the fourth mirror 20.

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 slit light, and an electrostatic latent image is formed on the drum l. 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 CO by the FLDC component.
The reflected light on the front original glass 91 is inputted to D 18 as original information, but the structure is such that the reflected light in the area where there is no original is extremely low.

The COD processing will be described later. Next, the C
After the OD processing is completed, scan for copying,
After obtaining the electrostatic latent image as described above, the designated developer 6 or 7
The manual feed cassette 24, the upper cassette 25. Lower cassette 26. Or from the designated paper feed slot of the transfer paper in the deck 27, the paper feed rollers 50, 51,
or 52, and is conveyed to the front of the registration rollers 28. A member 29 attached to an illumination lamp 14 (hereinafter referred to as a moving optical system) unit configured integrally with the first scanning mirror 13 is detected by a document leading edge position (image leading edge) detection sensor 30 and then predetermined. After time T, the registration roller 28 is driven, and the transfer paper 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. Thereafter, the transfer paper passes between the transfer charger 31 and the drum 1, so that the toner image on the drum 1 is transferred to the transfer paper, and after the transfer is completed, it is separated from the drum 1 by the separation charger 32. Thereafter, the surface of the photoreceptor drum 1 is cleaned by a cleaning device M3.
3, and the pre-exposure lamp 21 evens out potential unevenness, making it possible to use it repeatedly.

Further, the transfer paper separated from the photoreceptor drum l is led to the fixing device 3 by the transport unit (A), and after being fixed, the paper path path is switched and controlled so that it is transported to the duplex unit 35 by the flapper 34. , the transfer paper is transferred to the transport section (B
).

(C), switch back, and are stored in the intermediate tray 8. When the exposure operation for the set number of plates is completed, the original lO' on the original platen 12 is switched back by the RDF bus (D), (E), CF), and the original lO' is pulled back to the original platen 12 again.
Reset the original 10' so that the back side is copied on top. After the setting is completed, the transfer paper fed from the intermediate tray 8 by the paper feed roller 37 passes through the conveyance path (G) and is conveyed to the front of the registration roller 28, where it passes through the member 29 to which the moving optical system unit is attached. A predetermined time T after detection by the document leading edge position (image leading edge) detection sensor 30
After l, the registration roller 28 is driven, and the latent image is sent toward 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. Thereafter, the transfer paper passes between the transfer charger 31 and the drum 1, so that the toner image on the drum 1 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 photosensitive drum 1 is guided to the fixing device 3 by the transport unit (A) and fixed thereon, and then is discharged by the flapper 34 through the paper discharge roller 8 to the sorter 39. The copying operation is completed by performing this operation for the set number of plates. Further, the original 10' on the original table glass 12 is transferred to the original tray 4 via the paper path path (D).
0.

It is also possible to make double-sided copies from a single-sided original. In this case, the original 10 set in the RDF 9 is placed on the paper path path (H
) and set on the original glass 12, exposure operations for the set number of plates are 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 plates is completed, the original 10' is ejected onto the original tray 40 via the paper path path (D).Furthermore, in parallel with this original ejection operation, the next original is fed. The original is set on the glass 12.

Then, an exposure operation is performed on this document, and the intermediate tray 8
A copy is made on the other side of the transfer paper for single-sided copying stored in the paper, and the paper is discharged to the sorter 39. Further, when the exposure operation for the set number of plates is completed, the original is 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 RDF9, specify the multiple copy mode using the keys in the operation panel ll, which will be described later, and then set the number of copies. After specifying, enter the copy start key.This will cause the RD
The original 10 set at F9 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 transfer paper separated from the photosensitive drum 1 is guided to the fixing device 3 by the conveyance unit (A) and fixed thereon, after which it is multiplexed by the flapper 34 (
The paper path path is switched and controlled so that the paper is transported to the double-sided) unit. 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 transfer paper fed by the paper feed roller 37 from the intermediate tray 8 is placed in the register along the conveyance path (G) in order to copy on the same side of the transfer paper. The transfer paper separated from the photosensitive drum 1 is transported to the front of the roller 28 and subjected to a copying operation in the same manner as in the case of back side copying in the double-sided copying mode. The paper is 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 continuous shooting mode will be explained.

After setting the original on the RDF 9, use the operating section 11 (to be described later) to manually press the keys to perform quick copying, and then set the number of copies. , has a mode in which the color of one side and the color of the second side of the snapshot are predetermined automatically. 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 the paper size sensor 42, 43.4 is attached to the upper and lower cassettes or decks.
Select the paper feed slot in which A4 size transfer paper is set according to the 4 groups 0 For example, the upper cassette 25 has A3 size, the lower cassette 26 has A4 size, and the deck 27 has B
When four sizes of transfer paper are set, the paper is fed by the paper feed roller from the paper feed port of the lower cassette 26 in which A4 size paper is inserted, and then transferred to the registration roller 2.
After the image tip sensor 30 detects the member attached to the moving optical system unit, the registration roller 28 is driven after a predetermined time Tl, and the photosensitive drum 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 return starts from the reference position W15,
A member 29 attached to the moving optical system unit 45
is detected by the image edge detection sensor 30, the eraser lamp is turned on for a predetermined time T2 (A4 size width) to erase the latent image of the - side and the potential of unnecessary areas, and then the second A lower cassette 2 which obtains a latent image and visualizes the second latent image using a predetermined red developing device (color developing device), into which the A4 size is inserted.
The paper is fed by the paper feed roller from the paper feed port 6, is transported to the front of the registration roller 28, and after a predetermined time T3, the registration roller 28 is driven, and the paper is loaded onto the photosensitive drum 1 with accurate timing. The leading edge of the latent image is aligned with the leading edge of the transfer paper. After that, as mentioned above, the transfer process,
The copying process is completed by being discharged via a conveyance system through a fixing process. Further, as mentioned above, combinations of double-sided copying and a plurality of developing devices, combinations of double-sided copying and continuous copying mode, combinations of multiple copying, etc. will be described later. It is configured so that it can be specified using the operation panel. Another feature is
It also has a function of varying the process speed (circumferential speed of the photosensitive drum 1), and the process speed is varied when the irradiation light to the photosensitive drum 1 is insufficient, and when the writing function is selected with the operation unit 11, which will be described later. automatically reduces the process speed.

In addition, in order to erase any part of the latent image on the photosensitive drum 1, an eraser lamp with a large number of finely divided printing elements is arranged after image exposure and before development. It is constructed so that any latent image can be erased by controlling the light-emitting elements, and functions to combine the aforementioned multiple copies and the colors of the plurality of developing units to synthesize an image.

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).

Figure 3 shows the timing chart of the entire machine, and
Figures 8 to 8 show front 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 CCD 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 vD control and is performed four times. Next, the amount of light from the illumination lamp is controlled using the primary current obtained from the seven ports. Turn on the lamp to create a bright potential on the drum. The drum potential is measured by a potential sensor, and the bright potential approaches the target potential of 50V.
Controls the light intensity of the lighting lamp. This is called VL l control, and is performed three times.The bright potential is measured again using the light intensity obtained with VL l, and this potential is called VL2.

This is used to determine the developing bias DC. VL
2. After the measurement is completed, the 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 and density position of the document. Detect. At this time, when the document heat is detected, 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 VL 2+70v, and the developing bias AC is also turned on. Furthermore, desired blank lighting control is performed from a predetermined timing starting from one stroke ahead.

FIG. 8 is a timing chart of post-rotation. After the final reversal of scanning, post-rotation begins, starting with primary charging,
The developing device, developing bias DC, developing bias AC are OF
F, sensor ÷ 200V, 0FFL, post charging, transfer charging 9 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 OFF, 25
Reference numeral 1 denotes a document placement glass, and a touch panel using transparent electrodes is provided on the glass surface.By pressing a suppression pen 252 onto the document placement glass 251, a specified position is displayed. Coordinates can be detected. Note that the principle of the touch panel will be omitted here. Of course, even when an image is formed by exposing a document, since a transparent electrode is used, the latent image formed on the photoreceptor is not affected. 253 is a switch provided on the pen, and coordinate input can be executed only when the switch is pressed. 254 is an LED array installed on the edge of the document storage glass 251 along the X direction and the Y direction, and
It can be turned on and off at will based on U's instructions.

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.

The function of each key will be explained step by step.

100a-e 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. A desired copy mode can be set. In this copying apparatus, the memory is always maintained by a backup power source.

Numeral keys 101 to 110 have a normal number-of-sheets setting function and, in combination with an asterisk key, a function of inputting various data in various asterisk modes.

Reference numeral 111 is a clear key for clearing the set number of copies or data, and reference numeral 112 is a reset key for returning the set mode to a predetermined standard mode.1 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, a built-in LED 150 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,
Selects an AE mode that detects the original density and corrects the developing bias to obtain copies with 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 keys 118 and 120 to obtain a desired density. In addition, key 11
If key 8 is pressed, the density will become higher (deeper), if key 120 is pressed, the density will be lowered (lighter), and the display 15 will change accordingly.
The concentration level of 3 changes. 152 and 153 are display groups indicating the above concentration 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 APS mode; 6 122 is a fixed enlargement ratio selection key; 123 is a fixed reduction ratio selection key; 124 is an automatic magnification selection key. (Auto
Magnifica-tion 5elec
t: 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 AMS mode is selected.

Indicator 158 lights up. 125 is a zoom key,
It is possible to adjust the magnification in 1% increments using the 10 key and the - key. 126 is the same magnification key, which is a fluorescent display tube that sets the copy magnification to the same magnification (100%), and normally displays the set copy magnification 2, selected cassette size, copy mode, etc. It also functions as a message display when the user makes a mistake in an operation, or when a complicated operation procedure is performed.

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. [Double-sided→Double-sided] copy selection key, and 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 the keys 127 to 130 is pressed, one of the indicators 159 to 162 lights up correspondingly.

Reference numeral 131 is a page quick copy selection key, which enables exposure scanning of the original on the document table into two halves from left to 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 quick 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 is a page continuous copy/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 a tree edge or a shadow appearing in the center of a double-page spread in the page snapshot 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.

140 is an automatic switching key for cutting out or cutting out areas (inlout) and developing color in multiple copies;
When this mode is selected in multiple copy, A copy and B copy are automatically in/out,
Colors can be switched.

141 is a one-color automatic switching key for page snapshot;
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 the car in which each mode is selected.

Reference numerals 172 to 174 indicate the number of set areas, and in this copying apparatus, up to three areas can be set. Reference numerals 175 and 176 indicate display portions indicating inner cutting/outer cutting, which are lit in the mode set by the key 138.

The value of the set area for the 177 LED groups is X m i
n.

Xmax, Ymin, Ymaxc7).

Reference numeral 142 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 section.

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 of data are required to compose one character, and character generator 2
From 03.

The 35-bit data is read out sequentially and transferred to the shift register latch driver 204, and the shift register latch driver 204 reads 5 bytes of data, that is, 35
Bit data 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 a little less than 1/40 (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 key 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 a location pressed with a 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 on the document table glass frame.

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. When you specify the area of the tilling line in FIG. Medium L
ED (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 is color detection switch 0N1
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 the figure, if three switches are used for color detection, 23-1=7 different colors can be detected.

It has a structure that can be separated.

Next, consider setting an area.

When the area designation key 136 in FIG. 10 is pressed, "Ryoiki City...1: GENKOKIJUN 2: CASSETTE KISHUN" is displayed on the message display 15B.
The flashing indicates which one is currently selected, and you can also change the mode by pressing °l" 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,
Specify the points in the order of X coordinate, Ymin coordinate, and Ymax coordinate to complete the specification of the l area.Specifically, "X/Y", Xm1n, "X/Y",
X m a x .

“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 inputting each coordinate, please use the message display to select “Area 1:
Since it is performed interactively like "Q m m", even a user using the device for the first time can easily set it.

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. Here 1n10ut key 138
You can change to inner extraction mode by pressing .

゛ Furthermore, the area specification 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 suppression pen 252 presses two diagonal points of a specified area (limited to a rectangle) on the document. At this time, press the input switch 253 while pressing with the pressure 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 1 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 the CCD 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 marker pen, it is desirable to develop the color so that it is thin enough to be able to see the desired area.

Place the document on the document table and press the area detection key 142.
The optical system starts scanning, and the CCD installed on the optical path
to recognize the marked area on the document. 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 function keys 100a-e.

Furthermore, 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 Y-axis of the document table glass 1.

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 XY coordinate using the Y key 137, the corresponding coordinates can be sequentially called up on the message and display.1 In this state.

It is also possible to modify the set area using the numeric keypad. Of course, transparent digitizer (touch panel), C
Numerical values entered and set by OD 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 way, the erase means erases the inside or outside of the area during the copying process, thereby making it possible to obtain a desired copy.

When the CPU recognizes the coordinates of the area, it moves in the sub-scanning direction (X direction)
For, Xmin-Xma of the image formed on the drum
The blank exposure lamp (LED array) is turned on (inner removal) in the range corresponding to
By turning on (inner cutting) or turning off (outer cutting) the LED array in the range corresponding to n to Ymax, a copy of the inner or outer region is obtained.

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 storage 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 the coordinates.

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.

This copying apparatus has a document size detection means using a CGD 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 bliscan, 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 to provide 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 1 determination 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 CGo 18 detects that the document is placed diagonally, a warning is displayed and the process stops. Incidentally, the slanted placement of the original is detected from the coordinates of the corners of the original and the inclination of the edge of the original.

However, since the user may intentionally place it in such a way, the 1g notification release SW (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 selected cassette size or the copy magnification is specified for the document size detected as 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,
In the calculation process, the document size is made smaller (with some leeway) in small increments. in particular,
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 almost equal to the standard size, it is possible to select a unique magnification between these standard sizes in preference to the accurately calculated magnification. .

In addition, although I am a cassette size woman, in addition to the standard size provided by the manufacturer, there are many cases in which special sizes are frequently used by the user or the empire. Also AMS, APS
In order to perform this, the X and Y dimensions of these universal cassettes can also be registered. As with the area specification, there are three possible setting methods.

First, enter the asterisk (tree) mode to wait for input. At this time, dimensions are displayed interactively on the message display.

l Universal 1: X (vertical): mm.

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

In this state, the dimensions in the X and Y directions are input in mm using the numeric keys.

Also, the paper size is set on the document table 251 and set using transparent electrodes, or the paper size is detected 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, a method for setting the 1 magnification will be described.

In this copying apparatus, fixed magnification selection keys 122.12
3. Arbitrary magnification (zoom) selection key.

In addition to setting the magnification using the automatic magnification selection key 124 or the like, 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 (*) mode and specifying two points on the digitizer on the document table. In other words, the distance from the first press point to the document reference point = 2
A magnification is set according to the ratio of the distance from the press point to the document reference point. If you specify a point further away than the first press with the second press, you can enlarge the image, and if you specify a point closer to it, you can get a reduced image. 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 magnification determination methods, the calculated magnification can be used by the copying machine. With a copying machine, it is possible to obtain the desired magnification by repeating the copy up to two times, so if the first copy is not possible, the second copy is performed at the same time. The copy magnification can be specified as follows.

11000% 1st:○○○%, 2nd: 000
%” 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, it is also possible to determine the copy magnification by combining digitizer input and document detection by COD. That is, it is sufficient to detect the size to be enlarged or reduced using a digitizer, and determine the copying magnification based on the ratio of the two sizes.

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, the coordinates corresponding to the desired copy size are input (step 2).The coordinates are input by specifying a point diagonal to the origin 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 (
Step 3) Determine whether the calculated copying magnification is within the variable magnification range of the device Step 4) If within the range, display the magnification (Step 8); Find the square root of the magnification that was calculated to check whether it can be copied twice (step 5), check whether the value is within the range that allows scaling (step 6), and check whether it is within the range. In this case, the first and second copying magnifications are displayed using the obtained square root value as the copying magnification (Step 9).

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

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.

Next, we will discuss the control of copying operations, focusing on functions such as page copying, multiple copying, and area specification.

This will be explained using the flowcharts shown in FIGS. 16-2 and 16-3. In step 11, the copy start key is turned on.
It is determined whether or not it 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 development bias etc. (step 30.31), and color selection, ie.

Determine whether or not the color copy mode is set (step 32); if not, select the black developer (step 33); if the color mode is selected, select the color developer (step 34). ), then it is determined whether there is an area specification or not (step 35), and if there is an area specification, it is determined whether or not it is based on the cassette when changing the magnification (step 36); if it is not the cassette reference, it is the original reference, Since the area itself is scaled according to the magnification ratio, the area obtained by multiplying the set area by the copy magnification determined in step 30 is set as the set area (step 37). Therefore, the inside or outside of the area is removed. If so, all you have to do is turn on the blanking LED corresponding to this new area, and then check which mode the in/out key is in, i.e. whether it is inside or outside the area. If it is determined, step 38), if it is in mode, a flag is set to erase the outside of the area by controlling the blank exposure lamp (step 39), and if it is out mode, a flag is set 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 the page continuous copying mode is set (step 41). If the page rapid copying is performed, the A copy (original copy) will be used to determine the scan width. It is determined whether or not to copy the left half of the document placed on the stand (step 42).

If it is an A copy, set the flag to perform an A scan (scanning the left half of the document placed on the document table); if it is not an A copy, perform a B scan (scanning the right half of the document). A flag is set (step 44). If it is not a page copy, scan according to the size of the document, and perform the copying process such as exposure, development, transfer, fixing, etc. according to the conditions determined by the above judgment (determine whether it is a step or not, and perform multiple copying) If it is not a copy, eject the paper to the output tray (Step 14)
If it is a multiple copy, store it in the intermediate tray with the copied side facing down (step 15), and check whether it is in the automatic color and area conversion mode, that is, for the first and second copy. Automatic conversion of inner and outer edges of areas It is judged whether or not the key 140 or 41 for automatic conversion of one color has been pressed (Step 16). If the automatic conversion mode is set, inner and outer edges of colors and areas are automatically converted. Convert the clipping (step 17), and determine whether the mode is page quick copy (step 18). If not, wait for the manual copy start key input (step 20), and then perform page continuous copying. If the copy routine is in the mode, 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 the magnification is changed based on the original, the area is also resized as shown in (b), and the image may be missing within the resized area. It subsides. However, when copying with variable size based on the cassette standard (C)
As shown in Figure 2, since only the image of the castle is scaled and not scaled, part of the image may be missing.

FIG. 17 is a circuit block diagram of this embodiment. 400
is a control microcomputer.

18 is the CC image sensor, 401 is the A/D controller
402 is a CCD drive pulse generation circuit. 403
404 is a document/area mode switching signal from an external circuit, 405 is a home position φ signal from the optical system home position sensor 15, and 40B is an image signal from the image tip sensor 30. 407 is a shift pulse signal of the CCD image sensor 18, 408 is a reference clock signal φ, and 409 is a CC
D image sensor 18 transfer lock signal φ1.41
0 is the same transfer lock signal φ2. 411 is the reset pulse RS, 412 is the output signal CCD OUT of the CCD image sensor 18, 413 is the clock signal A/D CLK of the A/D converter 401, 414
is the digital signal DATA after A/D conversion of the output of the CCD image sensor 18. 114 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 start signal 40.3 is applied to 00 from the outside, a program for document detection and area recognition, which will be described later, starts running.

First, the microcomputer 400 uses a built-in timer function to output a reference clock signal φ408 and an A/D converter clock signal A/DCLK413. From the reference clock signal φ408, the COD drive pulse generation circuit 402 generates transfer locks φ1409 and φ2-410, and a reset pulse R5411. The output signal CCD of the CCD image sensor 18 driven by these clock pulses is
0UT412 is.

A/D conversion is performed by the A/D converter 401, and its digital output DATA 414 is read from the input port of the microcomputer 400. Original/area mode switching signal 404, home. The position signal 4051 and the image light signal 406 will be described in the explanation of the flowchart described later.

Further, when a request for dimming for the CCD image Φ sensor 8 occurs, the dimming circuit 415 turns on the lamp 14 in response to a lamp on/off signal 416. The microcomputer converts the A/D conversion value DATA of the output signal of the CCD image sensor 18.
While looking at 414, read the dimming data CVRDATA417.
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 an AE datar, which will be described later, so as to obtain appropriate exposure.

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

Reset pulse R3 and CCD output signal CCD
0UT424, A/D converter clock AD
CLK425, A/D converter output DATA42
A program for the 0 interrupt, which is a timing diagram showing the phase relationship of the interrupt timing 427 and the 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 CCD image sensor shift pulse signal 5h
407.431 is the output signal C of the CCD image sensor
CD0UT412.432 is the threshold level, 91
1 is a standard white board, 15 is an optical home position sensor, 30 is an image tip sensor, 12 is a manuscript table, 435 is a manuscript, 4
36 is a position where the output of the COD image fist sensor is processed by the microcomputer 400.

As shown in the figure, the output data of the COD image sensor is not all processed in each line, but is processed at regular intervals because the processing speed of the microcomputer 400 is slow. This is because you won't be able to make it in time. Shifting the processing position line by line is a means to prevent the detection accuracy from decreasing as much as possible.

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

441 is an original document, 422 is a dummy copy made from the original document, dummy m-copy 433 is a dummy copy with markings, and 444 and 445 are desired copies.

To explain the procedure, first set the original document 441 on the document table, perform the copying operation in 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
Set the dummy copy marked with a black marker as shown in 43 on the document table, and scan the area recognition mode optical system to detect the marked area. Manuscript 44
1 on the document table, specifying the inside and outside of the area and copying, it is possible to obtain a copy such as 444.445.

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

FIG. 22 shows the main flow of the document detection and area recognition program. The entire control program is set up so that this program is executed when the need for document detection or area recognition arises during the flow of the copy sequence.This flowchart will be explained according to the diagram shown in FIG. When a problem occurs, a program according to this flowchart is executed from ①.

In step (2), the reference clock φ408,
And A/D converter clock pulse A/DCL
In this embodiment, both of the two clock pulses are oscillated by a timer function (with an interrupt function) built into the micro Φ computer 400. Next, in step 2, the optical system home position signal 405 is waited for, and if the signal is detected, the process proceeds to step 2, and this time it waits for the image tip signal 406. When the image tip signal 406 is detected, the interrupt is enabled in step (3). Then, wait until the detection completion flag is set in step (■).

If set, this program will be extracted from ■ and continued to other programs.

FIG. 23 shows a part of the interrupt routine of the document detection and area recognition program. When the 0 interrupt, which is a flow executed at the timing shown in FIG. 18, is executed, the main flow is entered from ■, and at O 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. Whether or not it is the timing to output the shift pulse 407 at 0 is judged from the value of the clock counter, and if so, the process jumps to the sh cell as indicated at 0. If it is different, it is determined at O whether the program currently being executed is a multiple interrupt or not, based on the flag. If there are multiple interrupts, jump to O to extract them from the interrupt program; otherwise, go to O and check the data read position or sample.
Judgment is made by comparing the point value and the clock counter value. If it is different, it jumps to 0 and exits the interrupt program. If it is at the reading position, it goes to (2) and determines the mode based on the document/area signal 404. If it is in area detection mode, jump to the area detection mode routine as shown in ◎.If it is in document detection mode, go to O and COD
By comparing the A/D conversion value of the image sensor output and the set threshold level value, it is determined whether or not the original is at the position on the original platen 12 indicated by the current line counter and clock 9 counter values. to decide. If there is no manuscript, jump to O, if there is a manuscript, go to O, Q
In this case, the clock counter value Xmaxl is stored in the buffer.

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 is finally determined that there is a document in that line is Everything will be stored for each line.

Next, in O, all the lines processed so far are
Maximum and minimum values of the clock counter when data is determined to have a document, Xmax, Xmi
n, and the maximum and minimum values of the line counter, Y
max, Ymin and the current values of the clock 9 counter and line e counter, and update if necessary.

Next, at O, the A/D converted values of the COD image sensor output are stored in a buffer for 1 line and 1 page. At O, it is determined whether the data processing for 1947 minutes has been completed or not based on the value of the clock counter. If it has not been completed, the sample point is updated at O, and then 0.
If the interrupt program has been completed, the A/D conversion value of the COD image sensor output for 1 line is changed from the first data that indicates a document exists to the last data that indicates a document exists. AE data counters corresponding to the maximum and minimum values of the data up to the data are counted up. However, if an area for AE data collection is set, A
E Counts up the data counter.

The maximum value and minimum value of this counter are calculated for all possible values, and are the data for performing AE.
Prevent the value of aXl from being updated in the next line processing.

Store in RAM specific to this line. Then, extract the interrupt program from O.

24 is a part of the interrupt routine of the document detection and area recognition program.0 If the area detection mode is at 0 in FIG. 23, the process jumps to O in this figure as shown in O. It is judged by the flag whether it is a stage or not, and if it is the first stage, it jumps to the 5EQl routine as shown in O.
2nd in. 3rd゜4th. It is judged by the flag whether it is the 5th stage, and if YES, Q, 0. Jump to 5EQ2.5EQ3.5EQ4,5EQ5 routine like @, @. If no, proceed to the next step.

At 0, it is judged by the value of the clock counter whether data processing for l lines has been completed, and if it has been completed, it jumps to 0 and exits the interrupt program, and if it has not been completed, the sample point is updated at 0. After doing this, go to 0 and extract the interrupting program.

Filling 251iiδ l+ 100ηa h axis O top 1
This is part of the system's interrupt routine. From Figure 24 Q, @, @, Q, @,
0 in this figure. ◎.

It jumps to Q, Q, Q.

When jumping to O, the A/D conversion value of the COD image sensor output is compared with the set threshold level value at 0, and the document table 12 is displayed as indicated by the current line counter and clock counter values. Determine whether there is a document at the position above. If not, jump to 0 and jump to O in Figure 24. If there is a manuscript, jump from O to O in Figure 24 as the second flag at ◎.

When the value jumps to 0, the A/D conversion value of the COD image sensor output is compared at O with the value of the set threshold Φ level, and it is determined whether it is the black spot level. If not, jump from O to O in Figure 24, and if it is a black spot level, set the flag to the third stage at ◎, and from O to O in Figure 24.
Jump to

When it jumps to O, it is similarly judged at O whether there is a manuscript, and if there is not, it jumps to 0 and jumps to 0 in Figure 24. If there is a manuscript, it goes to 0, and Xmin, Xmax, Y
The values of min, Ymax and the current line building counter,
When the value of the clock counter is compared and updated at 0, the flag is set to the fourth stage and jumps from 0 to 0 in FIG. 24.

If it jumps to 0, judge whether it is a black spot level in the same way at 0, and if not, jump from O to 0 in Figure 24, and if it is a black spot level, set the flag to the 5th stage at 0, then O Jump through to 0 in Figure 24.

If it jumps to O, it is determined whether there is a similar manuscript at 0, and if there is not, it jumps to O and then to O in Figure 24. If there is a manuscript, at 0, Xmin, Xmax,
Compare Ymin and Ymax with the current values of the line counter and clock counter and update them. Then, at O, the flag is set to the 6th stage, and then the program jumps through O to 0 in FIG.

FIG. 26 is a part of the interrupt routine of the document detection and area recognition program. Shift at ◎ in Figure 23.
If it is determined that it is time to issue a pulse (407), the process jumps to O in the figure as shown by ◎. Then, at O, a shift pulse 407 is outputted at the timing shown in FIG. At Q, the line counter is counted up, and at 0, it is determined whether the last line to be processed has been completed or not based on the value of the line reference counter. If it has been completed, the process advances to O and the shift pulse 407
The output of is fixed to high, interrupts are disabled at O, AE data is created at O, and the interrupt program is extracted from O. If it is determined that the program has not finished at O, proceed to 0 and sample φ Set the point and l line end values, initialize counters etc. with 0, and exit from the interrupt program with O.

FIG. 27 is the main flow of the document detection and area recognition program with page memory. The overall control program is designed so that this program is executed when the need for document detection or area recognition occurs during the flow of the copying sequence. To explain this flowchart according to the diagram, first, when the above-mentioned need arises, ■
The program according to this flowchart is executed. In step (2), various counters (clock counters, line Φ counters) etc. on the RAM are first initialized, and in order to generate various pulses to drive the CCD image sensor in
8, and the clock pulse A/D of the A/D converter
Outputs CLK413.

In this example, both the two clock pulses are
The system waits for the optical system home position signal 405 at the 0th order (2), which is oscillated by the timer function (with an interrupt function) built into the computer 406, and when the signal is detected, advances to (2) and waits for the image tip signal 406. When the image tip signal 405 is detected, the interrupt is enabled in step (3).

Wait until the detection end flag is set in ■.If set, read the COD output data on the page memory in order in ■, and then wait until the detection end flag is set in ■.
If so, count up the AE data counter corresponding to that data in area A in [phase], and if not, count up the AE data counter corresponding to that data in area B in ◎. Count up. At ◎, the process returns to ◎ until all data has been processed, and when the process is completed, the process is extracted from O and the program ends.

FIG. 28 is a part of the interrupt routine of the document detection and area recognition program, and is a flow that is executed at the timing shown in FIG. When the interrupt is executed, the main flow is entered from 0, and at O, the clock counter that counts the number of output data outputted in time series from the CCD image sensor for each column is counted.
Up. Shift pulse 407
It is determined from the value of the clock counter whether it is the timing to output the
If not, it is determined from the flag whether the program currently being executed has multiple interrupts at O. If there are multiple interrupts, jump to O and extract from the interrupt program.
If not, the process advances to O and the data read position is determined by comparing the sample point value and the clock counter value. If it is different, it jumps to O to exit the interrupt program, and if it is at the reading position, it goes to 0, and the mode is determined based on the document/area signal 404. If the area detection mode is selected, the routine jumps to the area detection mode routine as shown at 0. If it is the document detection mode, the process advances to O and the A/D conversion value of the COD image sensor output is compared with the certified threshold level value to detect the document table 12 indicated by the current line e counter and clock counter values. Check whether there is a document in the upper position. If there is no document, jump to [phase], if there is a document, proceed to O, in Q, set the clock counter value to
Store it in the buffer as max l. This value is l
It is updated every time there is a document in a line, and eventually, the clock counter value at the time of the last data that was determined to have a document is stored for each line. will be done.

Next, in O, all the lines processed so far are
Maximum and minimum values of the clock counter when data is determined to have a document, Xmax, Xmin
, and the maximum and minimum values of the line φ counter, Y
Compare max, Ymin with the current values of the clock counter and line counter, and update if necessary.

Next, at O, the A/D converted values of the COD image sensor output are stored in a buffer for 1 line and 1 page. At 0, it is judged by the value of the clock counter whether data processing for l lines has been completed, and if it has not been completed, the sample point is updated at 0, and then the data processing is completed at 0.
The interrupt program is extracted through the . If it has been completed, the value of Xmaxl, which is the last data that indicates that there is a document, among the A/D conversion values of the COD image sensor output for 1 life in [phase] will be updated in the next line processing. It is stored in a RAM specific to this line so that it does not occur. Then, extract the interrupt program from O.

Figure 29 is part of the interrupt routine of the document detection and area recognition program.0 If the area detection mode is at O in Figure 28, the process jumps to 0 in this figure as shown in O. If it is the first stage, jump to the 5EQI routine as shown at O. Similarly Q, Q, Q.

21, 2nd and 3rd in FIG. 21, respectively. 4th.
Judging by the flag whether it is the 5th stage or not, each is YES
et Q, Q, Q, Q like 5EQ2.5EQ3.5EQ
4. Jump to 5EQ5 routine, if NO, proceed to next.

At O, it is determined whether data processing for 1 line has been completed or not based on the value of the clock e counter. If it has been completed, jump to O and exit the interrupt program; if not, update the sample point at 0. After doing this, advance to 0 and exit the interrupt program.

FIG. 30 is a part of the interrupt routine of the document detection and area recognition program. Figure 29 Q, Q, Q, @, QJ
: Li, @, Q, Q in this figure.

Q, it jumps to Q.

When jumping to O, the A/D conversion value of the COD image sensor output and the set threshold level value are compared at O, and the document table 12 is displayed as indicated by the current line counter and clock counter values. Determine whether there is a document at the position above. If not, jump to O, jump to the 29th O, if there is a manuscript, set the flag to the second stage at 0 and O
When it jumps from O to O in Fig. 29, the A/D conversion value of the COD image sensor output is compared with the set threshold level value in [phase] to judge whether it is the black spot level. . Otherwise, it jumps from O to 0 in FIG. 29, and if it is a black spot level, the flag is set to the third stage at 0, and it jumps from O to O in FIG. 29.

When it jumps to ◎, it is judged whether there is a manuscript in the same way at 0, and if there is not, it jumps to O and jumps to 0 in Figure 29. If there is a manuscript, it goes to O, and Xm1n, Xmax, Ymin
, Ymax and the values of the current line Φ counter and clock counter are compared and updated. At the 0th time O, the flag is set to the fourth stage, and the flag jumps from O to 0 in FIG. 29.

If it jumps to O, judge whether it is the level of black grass in the same way at O, and if not, jump from O to @ in Figure 29, and if it is black water level, set the flag to the 5th stage at O, then O Jump through to [phase] in Figure 29.

When it jumps to O, similarly determine whether there is a manuscript or not, and if there is no manuscript, jump to O and jump to O in Figure 29. If there is a manuscript, at O, check Xm1n, Xmax, Ymin, Ym.
Compare aX with the current line counter and clock counter values and update. 6th flag at O
Set the stage and then jump through O to O in Figure 29.

FIG. 31 is a part of the original detection and area new style program interrupt routine. Shift at O in Figure 28.
If it is determined that it is the timing to issue the pulse 407, the process jumps to O in the figure as shown at O. Then, at O, shift φ with the timing shown in FIG.
A pulse 407 is output. At O, the line counter is counted and then at O, it is judged from the value of the line Φ counter whether the last line to be processed has been completed, and if it has been completed, it advances to @ and outputs the shift pulse 407. It is fixed to high, interrupts are disabled at O, AE data is created at ◎, and the interrupt program is extracted from O. If it is determined that the program has not finished at O, the process advances to 0, sets the sample point and l line Φ end value, initializes counters, etc. at O, and exits from the interrupt program at O.

FIG. 32 is a flowchart of the dimming program. When a sequence requires dimming for the COD image sensor, a program according to this flowchart is executed. After entering from ■, the lamp is first turned on by the lamp on/off signal at ■. The dimming data at this time takes the set value. Next, in ■, the reference clock φ・4
08, A/D converter φ clock, A/D CLK
413, shift pulse 5h407 is output, COD
At the 0th order ■ where the image sensor is driven, CO
DATA4 of the A/D conversion value of the output of the D image sensor
14, it is determined whether an overflow has occurred.

If over flow occurs, proceed to ■ and read dimming data 4
17 is counted down by 1, and the process returns to (2) and this loop continues until there is no overflow. When no overflow is seen in (2), the process proceeds to (2) and the dimming data is counted up. Next, check for overflow in step (2), and return to step (3) until overflow occurs. When an overflow occurs, proceed to step 2 to store the dimming data, and end the dimming program at step .

〔effect〕

As described above, according to the present invention, since the magnification can be set from two areas designated by the digitizer, the magnification can be determined in accordance with the actual feeling, and operability is improved.

[Brief Description of the Drawings] Figure 1 is a cross-sectional view of the configuration of an embodiment of a copying machine to which the present invention is applied, Figure 2 is a block diagram of a circuit that determines process speed, and Figure 3 is a timing diagram of the entire device. Charts: Figure 4 is a timing chart for pre-rotation, Figure 5 is a timing chart for potential control, Figure 6 is a timing chart for CCD dimming and CCD measurement, Figure 7 is a timing chart for scanning, and Figure 8 is a timing chart for rear rotation. 9-1 is a perspective view showing an embodiment of a copying machine to which the present invention is applied; FIG. 9-2 is a main perspective view of the document storage table; and FIG. 1O is a main view of the operating unit. 11 is a block diagram showing the configuration of the display section, FIG. 12 is a block diagram of the input section, FIG. 13 is a block diagram of the LED array drive circuit, and FIG. 14 is a block diagram showing the configuration of the display section.
FIG. 15 is a diagram showing the lighting of the ED array, FIG. 15 is a developing device diagram, a circuit block diagram of an embodiment of the present invention, FIG. 18 is a timing chart diagram of control pulses, and FIG. 19 is a CVRD diagram.
A diagram showing the relationship between ATA and lamp lighting voltage, Figure 20 is a diagram to explain the document detection method, Figure 21 is a diagram to explain area designation by marking, and Figures 22 to 3.
FIG. 1 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 an intermediate tray, and 18 is a COD for document detection.

Claims (1)

[Claims] (1) A copying apparatus comprising: a digitizer for specifying an area to be copied; and means for determining a copy magnification from the two areas specified by the digitizer.