JPS6235387A - Copying device - Google Patents

Abstract

PURPOSE:To form a desired pattern on a recording medium without a drop in a process speed by forming a desired pattern in the 1st image forming cycle and a transferred image in the 2nd image forming cycle. CONSTITUTION:The titled device is to write a desired pattern using a multicopy mode. In a pattern write cycle a process speed is set at a low level, while in an original transfer cycle it is set at a high level. Thus an extreme drop in a transfer speed is prevented, and a desired transfer image can be obtained. Moreover a write function can be realized through use of an inexpensive light source. Plural developing units are provided, and a developed color is changed in the pattern write cycle and the original transfer cycle, thereby obtaining a clear attractive copy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a copying apparatus that is capable of forming a desired pattern on a recording medium.

[Prior art]

Conventionally, this type of apparatus has been proposed in which, for example, a semiconductor laser, a scanner, and its driving circuit are provided separately from a document copying mechanism, and a desired pattern is formed on a recording medium of a photoreceptor shade.

However, the device described in L has a disadvantage in that the structure is very complicated and the entire device is expensive. Further, when forming a desired pattern on the recording medium 1-, if the light source for writing the pattern has insufficient light, the overall process speed must be reduced, resulting in the inconvenience of lowering the overall specifications of the device. arise.

〔the purpose〕

The present invention has been made in view of the point L, and an object of the present invention is to provide a copying apparatus that is capable of forming a desired pattern on a recording medium 1 through a cylinder configuration without causing a decrease in process speed. .

/′ 1, -- 〔Example〕 An embodiment of the present invention will be described below with reference to the drawings.

Description of Main Body: Figure 51 is a cross-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. There is also a device in which a pressure plate 90 is set in place of the RDF 9, and in each of these configuration diagrams, the surface of the drum 1 is made of a seamless photoreceptor using ASI, and is rotatably supported. When the power is turned on by the power switch 2, the fixing device 3 is heated, and when the temperature reaches a predetermined temperature, the main motor 4 causes the drum 1, 111 feeding sections A, B, and C and the fixing roller 5 to start rotating in the direction of the arrow. When the temperature reaches a predetermined fixing temperature, the main motor 4
This is an expected state in which the computer stops, 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 devices 6 and 7, copies can be made on transfer paper in a plurality of colors. In addition, by detecting the document size, AMS (automatic scaling) is possible.

It has an APS (automatic cassette selection) function 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 on the paper 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 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 the optical path length in front of the projection lens 16 and the original detection lens 17 is always kept constant.

In this way, the above-mentioned reflected light image is formed on the detection element C0D18 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 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.
FL, 00 minutes gives a bias to prevent toner from adhering to the document size detection element C.
The reflected light on the front original glass 91 is inputted to the OD 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 D processing will be described later.
After the processing is completed, scanning for copying is performed, and after obtaining the electrostatic latent image as described above, it is visualized by the designated developer 6 or 7, and then transferred to the manual feed cassette 24. Upper cassette 25
, the transfer paper in the lower cassette 26 or the deck 27 is fed from a designated paper feed port by 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. time T,
Thereafter, the registration roller 28 is driven, and the transfer paper 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, as the transfer paper passes between the transfer charger 31 and the drum l,
The toner image on the drum 1 is transferred to a transfer paper, and after the transfer is completed, the toner image is separated from the drum 1 by a separation charger 32.

Thereafter, the surface of the photoreceptor drum l is cleaned by a cleaning device 33.
It is cleaned by the pre-exposure lamp 21, 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 photosensitive drum 1 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 sheets is completed, the original platen 1
Pass the RDF on the original 10' on 2 (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 (G).
After a predetermined time Tl, the member 29 to which the moving optical system unit is attached is detected by the document front 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,
As the transfer paper passes between the transfer charger 31 and the drum 1, the toner image on the drum 1 is transferred, and after the transfer is completed, it is separated from the drum 1 by the 1-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 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 platen 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 10 set in the RDF 9 is transferred to the paper bus route (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 10' 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 RDF9, specify the multiple copy mode using the keys in the operation panel ll described later, then set the number of copies, select the developer to be used from among the multiple developers, and specify the developer. After doing so, enter the copy start key. As a result, the original 10 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 copies to complete the copying operation.
After ejecting the original 10' of No. 2 to the original tray via the RDF path (H), take out the next original from the RDF 9, set the original on the original table 12 as described above, and then eject the same original on the transfer paper. In order to make a copy on the surface, the transfer paper fed from the intermediate tray 8 by the paper feed roller 37 is transferred to the conveyance path (
The transfer paper separated from the photosensitive drum 1 is transported to the front of the registration roller 28 by the transport unit A), and the copying operation is carried out in the same manner as in the case of backside copying in the double-sided copy mode. After the paper is fixed, the paper is discharged by the flapper 34 through a paper discharge roller 38 to a 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 operating 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 color of one side and the color of the second side of the snapshot are automatically predetermined. In the following explanation, the original size is A3, the magnification is 1:1, and APS (automatic cassette selection) is selected.

- The operation in the mode in which the side and the second developer are predetermined (one side is black, the second side is red) will be explained.

- Set the copy size to A4 size and make it 1/1/2 of the original A3 size.
2) As described above, the document fed to the exposure position by the RDF 9 is scanned by the first scanning mirror and the illumination lamp 14, and after obtaining an electrostatic latent image as described above, a predetermined black color is developed. A paper size sensor 42 that is visualized by a paper size sensor and attached to the upper and lower cassettes or decks.
．． 43.44 Select the paper feed port in which A4 size transfer paper is set.0 For example, upper cassette 25 is set with A3 size transfer paper, lower cassette 26 is set with A4 size transfer paper, and deck 27 is set with B4 size transfer paper. If so, the A4 size paper is fed from the paper feed port of the lower cassette 26 by the paper feed roller, is conveyed to the front of the registration roller 28, and is moved to the member attached to the moving optical system unit. After a predetermined time Tl after detection by the image edge sensor 3o, the registration roller 28 is driven and the latent image is sent in the direction of the photosensitive drum l with accurate timing, so that the leading edge of the latent image and the leading edge of the transfer paper match. Be taken. Thereafter, as described above, the paper goes through a transfer process, a fixing process via a transport system, is discharged, and copying is completed, and then the second copying begins. The moving optical system is controlled to automatically return to the optical system reference position 15 (home position) when the exposure scan of the first side is completed, and the second copy start is started from the reference position 15. , member 2 attached to the moving optical system unit 45
9 is detected by the image edge 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 then the second time. The second latent image is visualized by a predetermined red developing device (color developing device), and the paper is fed from the paper feed port of the lower cassette 26 into which the A4 size paper is inserted. The paper is fed by a paper roller and conveyed to the front of the registration roller 28. After a predetermined time T3, the registration roller 28 is driven, and the sheet is sent toward the photosensitive drum 1 with accurate timing to form the leading edge of the latent image. and the leading edge of the transfer paper are aligned. After that, as mentioned above, there is a transcription process.

The copying process is completed by being discharged via a conveyance system through a fixing process. In addition, as mentioned above, combinations of duplex copying and multiple developing devices, combinations of duplex copying and quick copy mode, combinations of multiple copying and multiple developing devices, combinations of multiple copying and quick copying mode, etc. can be specified on the operation panel described later. It is composed of Another function is to vary the process speed (peripheral speed of the photosensitive drum 1) when there is insufficient light irradiated to the photosensitive drum 1. When the function is selected, the process speed is automatically reduced.

In addition, as an additional function, in order to erase any part of the latent image on the photosensitive drum 1, after one image exposure and before development, an eraser lamp with a large number of finely divided printing elements is arranged, and the printing part The system is configured so that any latent image can be erased by controlling the light-emitting elements of the system, and functions to combine the aforementioned multiple copies and the colors of multiple developers to synthesize images. .

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 a timing chart of the entire machine;
Figures to Figure 8 are forward 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, after controlling the pre-rotation potential, in preparation for the COD measurement scan, the lens moves to a position where the second mirror does not collide during full scan. The document size and document density are detected. Thereafter, the lens is moved according to the magnification or specified magnification by AMS calculation.

It scans for the set number of sheets, and after the last reversal, it starts to rotate backwards.

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 open control, and the amount of light from the illumination lamp is controlled using the 0-order, which is performed four times, and the primary current obtained by VD. 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 1 control.

The bright potential is measured again three times using the light intensity obtained in ML1, and this potential is called ML2, and 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 CCD 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 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 scanning, rotation begins, and sequentially from primary charging to developing device and developing bias DC.

Developing bias AC is OFF, sensor +200V, 0FF
L, furthermore, post charging and transfer charging 9 separation charging are turned off. Developing bias DC after 1 rotation of drum from primary charging OFF
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 is a document mounting glass, and a touch panel using transparent electrodes is provided on the glass surface.
By pressing the pressing pen on the document placement glass 251, the coordinates of the specified position can be detected.

Note that the principle of the touch panel will be omitted here. Of course, even when exposing a document to form an image, since a transparent electrode is used, it does not affect the latent image formed on the photoreceptor. 253 is a switch provided on the pen,
Coordinate input can only be performed 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 as desired 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. 1O is a main perspective view of the operating unit, and the functions of each key 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 below, and instantly by pressing one key. In a copying machine that can set a desired copy mode,
Memory is always maintained by backup power.

1ot-110 is a numeric keypad which not only has the normal number-of-sheets setting function but also has the function of 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, and 116 is a color key for selecting a plurality of developing devices built into the main unit.When a color developing device is selected, a built-in LED 150 lights up, including as a warning. do.

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 primary 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 if the key 118 is pressed, the density becomes high (high <), and if the key 120 is pressed, the density becomes low (light), 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 the function.

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

122 is a fixed enlargement magnification selection key, 123 is a fixed reduction magnification selection key, and 124 is an automatic magnification selection (Auto
o Mag'uni f i cat i on
Select: AMS) key, which has the function of automatically selecting the appropriate magnification based on the detected original size and the selected cassette size. Note that if the AMS mode is selected, the display 158 will Light. 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 usually has a set copy magnification and a selected cassette size.

It displays the copy mode, etc., and also functions as a message display when there is an abnormality in the device, when the user makes a mistake in operation, or when there is a complicated operation procedure.

127 is a single-sided/double-sided J 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 [duplex → single-sided] copy selection key, and 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 the keys 127 to 130 is pressed, 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, in one 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.

133 is book 11 with page continuous copy/double-sided copy selection key
It has the function of copying A1 P>B copies of the mountain trail field on the front and back sides of the same sheet of paper.

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 denotes 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 inner or outer cut out of an area in multiple copies (
This is an automatic development color switching key. When this mode is selected in multiple copying, 1n10ut, 1n10ut, and development color are automatically selected for A copy and B copy.
Colors can be switched.

141 is a one-color automatic switching key for page snapshot;
As mentioned above, it has a device that automatically switches 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.

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 parts indicating inner removal/outer stacking, which are lit in the mode set by the key 138.

The value of the set area for the 177 LED group is Xm1n.

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

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.

178, ) 79 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 of data are required to compose one character, and the character generator 2
03, 35-bit data is sequentially read out and transferred to the shift register latch driver 204, and the shift register latch driver 204 latches 5 bytes, that is, 35 bits of data. 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 (
(because there is blanking time).

Further, 208 is another LED MATRIX of the display section, which is driven by dynamic lighting.

Figure 12 shows the CPU 301 that controls the main body. A
It is a block diagram of sides. The key matrix 302 is a group of switches provided for each input key, and is processed by the dynamic bank body CPU 301 using a well-known technique 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 pressed with 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 on the document table glass frame.

LED arrays 309 and 310 are respectively installed in the x and y directions along the glass frame, and are controlled by the CPU 301 to dynamically light up.

Fig. 14 shows this situation. If you specify the outside of the shaded area in the figure, the LEDs indicating the X and Y coordinates 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.

Projections 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
0 FF Determines the color of the developer that has been reset based on the F status.

That is, each developing device has its own switch pattern for each color, and as shown in the figure, if three switches are used for color detection, the configuration is such that 23-1=7 types of colors can be discriminated.

Next, consider setting an area.

When the area designation key 136 in FIG. 10 is pressed, the message display 156 displays "Ryo Wiki City... 1: Genkou Kijun 2: Cassette Kijun'", indicating the currently selected one by flashing.
You can also change the mode by pressing "1" or "2" on the numeric keypad. This series of displays and operations is 13
It is executed only while the 6 key is pressed.

Here, a case will also be described in which the document-based area specification mode is selected. In this mode, at a position determined for the document, from the reference origin to the X axis (sub-scanning direction),
If you specify an area along the axis (main scanning direction), the specified area will also be automatically scaled even if you perform a variable-magnification copy.

Xm1n coordinate, Xma by numeric keypad and X/Y key
Specify the points in the order of x coordinate, Ymin coordinate, and Ymax coordinate to complete the designation of l area. Specifically, “X/Y”, Xmin, “X/Y”, X
max.

"X/Y", Ymin, X/Y", YmaX.

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

After setting the numerical value, when the "X/Y" keys are input, the 177 LEDs will light up in sequence.

The user can confirm that the coordinates of each point have been entered. Also, when inputting each coordinate, use the message display to select “6 area 1:Xm1n (to)
Since the settings are performed in an interactive manner such as "000, m m", 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. Here 1n10ut key 138
You can change to inner extraction mode by pressing .

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, the original is set face up on the original table, which is different from the standard when actually making copies (back left side). In this state, use the pressing pen 252 to specify an area (
press two points on the diagonal of the rectangle). At this time,
Press the input switch 253 while pressing it with the suppression pen. Coordinate input by the input switch 253 is an edge trigger at the moment of pressing or releasing, and if it is held down, the coordinates will not be input even if pressed with the pressure pen. .

Here, when specifying coordinates with a pen, two coordinates, X and Y, are specified simultaneously with one press, so the 172 LED groups turn on two points at the same time. In addition, the input coordinates are numerically displayed on the message display section at the same time as the input, so that 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 whose area is to be specified is copied onto the document table. On the copied paper, use a marker pen or the like to darkly mark the desired area with a frame. 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 0th-order marked original (including transparent sheets, thin paper, etc.) on the original table again and press the area detection key 142, the optical system will be activated. Start scanning and select C on the optical path.
The marked area on the document is recognized by OD. 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.

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, and pressing the correction key 139 once selects the second area.

If you press it once more, the third area will be selected, and if you press it again, you will no longer be specifying the area. Pressing it again selects the first area again. Furthermore, use the X/Y key 137 to
By selecting each coordinate, the corresponding coordinate 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, transparent digitizer (touch panel),
Numerical values input and set using 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 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.

Further, it is also possible to designate an area by allowing the LEDs 7 and 4tvON10FF to be specified using the operation section, and by 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, Xmin-X of the image formed on the drum
Blank exposure lamp (LE
D) is turned on (inner removal) or turned off (outer removal), and in the main scanning direction (Y direction), the LED array in the range corresponding to Ymin to Ymax of the image formed on the drum is turned on. Obtain a copy of the area with the inside or outside removed.

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 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.

Of course, the digitizer may be separated from the apparatus instead of being provided on the document placement glass.

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 C0D1B original size detection means, 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. For this reason, once it is detected that there is no document, the lighting voltage 1 judgment reference level etc. are changed and the briscan 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 C0D18 detects that the original 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 the device in this way, the warning cancellation switch (not shown)
Accordingly, 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 scanning direction), an appropriate image can be obtained by automatically performing image shift and adjusting the scan timing and paper conveyance timing.

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 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. 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 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. .

Furthermore, regarding the cassette size, 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 by the person leaving the country. 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 (*) mode to wait for input. At this time, dimensions are displayed interactively on the message display.

- 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 exposure cassette registration mode among the asterisk (*) modes.

In this way, it is possible to perform APS and AMS between non-standard document sizes, non-standard cassette sizes, and arbitrary magnifications.

On the other hand, this copying apparatus having an area specification function can also execute 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 (*) mode and specifying two points on the digitizer on the document table. That is, the magnification is set according to the ratio of the distance from the point of the first press to the document reference point: the distance from the point of the second press to the document reference point. 2
If you specify a point further away than the first press, you can enlarge the image, and if you specify a point closer to it, you can obtain a reduced image. This instruction will also be displayed on the message display.

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

“000% 1st:○○O%, 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 copy magnification of 50% to 150%, it is possible to specify a copy 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. 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 from 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
Step 1) 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. Also, when inputting with the numeric keypad, only the X or Y coordinates are required, and the copy magnification is calculated from the input coordinates 2/coordinates 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); If outside the range, display 2. Find the square root of the calculated magnification to check whether it can be copied in batches (Step 5), check whether the value is within the range that allows for scaling (Step 6), and if it is within the range. The first and second copying magnifications are displayed using the obtained square root value as the copying magnification (step 9), and if they are outside the range, a warning is displayed to that effect (step IO).

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 2 may be used as the second copying magnification.Therefore, there are many combinations. Furthermore, it is clear that a wider range of magnifications can be obtained by copying 3 times or 4 times, 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, the copy start key is turned on (power to do so)
If it turns 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 adjust the lens position, developing bias, etc. (Step 3'0.31
), then color selection, i.e., determine whether or not the color copy mode is selected (step 32); if not, select a black developer (step 33); if the color mode is selected, select the color developing device (step 33); (Step 34), and determine whether there is an area specification (Step 35); if there is an area specification, it is determined whether it is based on a cassette when the magnification is changed (Step 36); If not, it will be the document standard, and the area itself will be scaled according to the magnification ratio, so the area obtained by multiplying the set area by the copy magnification determined in step 30 will be set as the set area (step 37). If you want to cut inside or outside the area, all you have to do is turn on the blanking LED corresponding to this new area, and check which mode the in/out key is in, that is, if you want to cut the inside or outside of the area. Step 38)
, if it is in mode, set a flag to control the blank exposure lamp and erase the outside of the area (step 39).
, if it is the out mode, a flag is set to erase the inside ° (step 40).

In addition, if there is no area specified, the above control will not be performed, and it will be determined whether the mode is page snapshot (step 41). Step 42) A.
If it is 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, set a flag to perform a B scan (scanning the right half of the document). Set a flag on (
Step 44): If the page is not a quick copy, scan according to the size of the original, then expose, develop, and transfer 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 double-sided copying, and if it is one-sided copying, the copy is stored in the intermediate tray with the copied side facing up (step 12-2), double-sided copying. If not, it is determined in step 13 whether or not it is multiple copying, and if it is not multiple copying, the paper is ejected to the paper output tray.
4) 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, the first and second copies. Automatic conversion of inner and outer edges of areas during copying It is judged whether or not the key 140 or 41 for automatic conversion of 9 colors has been pressed (step 16), and if the automatic conversion mode is set, the inner and outer edges of colors and areas are extracted. , convert the outside exclusion (step 17).

Then, it is determined whether or not it is in the page quick copy mode (step 18), and if it is not the page quick copy mode, it waits for the 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 φ double-sided copy selection key 133.
When the automatic color changeover key 141 is pressed, a mode is set in which pages are quickly copied in different colors and double-sided copies are made. 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. At this time, the switch 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 a binding margin is formed, 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 changer 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 made with the originals on the left and the originals on the right in different colors. It will be done.

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

Further, 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 awaited.

(Operation of CCD) FIG. 17 is a circuit block diagram of this embodiment.
is a control microcomputer, and 18 is a CCD image -- 1'7? , 401 is an A/D converter, and 402 is a CCD drive pulse generation circuit. 403 is a copy start signal from an external circuit, 404 is a document/area mode switching signal from an external circuit, and 405 is an optical system home/area mode switching signal.
406 is a home position head signal from the position fist sensor 15; 406 is a tip signal from the tip sensor 30;
07 is the shift pulse signal of the COD image Φ sensor 18, 408if reference clock signal φ, 409 is the transfer lock signal φ1 of the CCD image sensor 18, and 410 is the transfer lock signal φ2.411 of the CCD image sensor 18. Reset meeting pulse R3, 412 is CC
D image sensor 18 output signal CCD OUT,
413 is the clock signal A/D of the A/D converter 401
CLK, 414 is a digital signal DATA after A/D conversion of the output of the COD image φ sensor 18. 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 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 φ2-410, and a reset pulse R3411. The output signal CC of the CCD image sensor 1B driven by these black and black pulses is
D0UT412 is converted to A by the A/D converter 401.
/D conversion, and its digital output DATA 414 is read from the input port of the microcomputer 400. The document/area mode switching signal 404, the home position signal 405, and the image tip signal 406 will be described in the explanation of the flowchart described later.

Further, when dimming for the COD image fist sensor 18 is required, the dimming circuit 415 turns on the lamp 14 in response to the lamp on/off signal 416. Microcomputer 400 is CC
A/D conversion value DA of the output signal of the D image sensor 18
While looking at TA414, read the dimming data C'VRDATA.
417 and dim the lamp 14 to an appropriate brightness.
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 s h420, transfer lock φl 421. φ2・422, reset pulse R5, and CCD output signal CCD 0UT424
, A/D converter clock AD CLK425.
A/D converter output D ATA 426. The 0 interrupt program, which is a timing diagram showing the phase relationship of 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 shift Φ pulse signal 5h of the COD image φ sensor
407.431 is the output signal C of the CCD image sensor
CD0UT412.432 is the threshold level, 91
93 is a standard white board, 93 is a document placement reference position, 15 is an optical system home position sensor, 30 is an image tip sensor, 12 is a document table, 435 is a document, and 436 is a microcomputer 400 that outputs the output of the COD image sensor. This is the position to be processed.

The reason why the output data of the CCD image sensor is not all processed in each line as shown in the figure, but is processed at regular intervals is because the processing speed of the microcomputer 400 may be slow. 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 the original manuscript, 422 is a gummy copy made from the original manuscript, 433 is a dummy copy with markings, and 444 and 445 are obtained copies.

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

For this gummy Φ copy 422, select the area you want to specify by 4
43, a dummy copy marked with a zero-order mark using a black marker or the like is set on the document table, and the optical system is scanned in the area recognition mode to detect the marked area. Next, once again, original manuscript 4
By setting 41 on the document table and copying by specifying the inside and outside of the area, copies such as 444 and 445 can be obtained.

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, and 451 to 456 are 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.

To explain this flowchart according to Figure 0, which shows the entire control program, first, when the need for document detection or area recognition as described above occurs, the program according to this flowchart is executed from step l. .

In step 2, first, various counters (
In order to generate various pulses to drive the COD image sensor at the 0th step step 3 where initialization of the clock counter, line counter, etc. is performed, the reference clock φ408 and the A/I) converter clock φ pulse A/DCLK413 are used. In this embodiment, both the two clock ψ pulses are oscillated by the timer function (with interrupt function) built into the microcomputer 400. Next, in step 4, the optical system home position signal 405 is waited for, and the signal is output. If detected, step 5
The process then waits for the image tip signal 406. Image tip signal 406
If detected, in step 6 the interrupt is enabled. 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 is a part of the interrupt routine of the document detection and area recognition program, and is a flow executed at the timing shown in FIG. 18. When an interrupt occurs, the process enters the tree flow from step 9, and in step 10, a clock counter that counts the number of columns of output data chronologically output from the COD image sensor is counted up.

Then, in step 1O, it is judged from the value of the clock counter whether it is the timing to output the shift pulse 407, and if the timing is right, the process jumps to the sh line as shown in step 22; if not, it jumps to step 12.
It is determined from the flag whether the program currently being executed has multiple interrupts. Step 2 if multiple interrupts
Jump to step 1 to exit the interrupt program. If not, proceed to step 13 and compare the value of the sample point and the clock counter to see if it is the data read position N (timing). Judgment is made based on whether the If the value of the sample point and the value of the clock counter are different, jump to step 21 and extract from the interrupt program; if they match, determine the reading position and proceed to step 14-f@Hyakutan/Tako Pray! i tool A 1'
lJL Sugahi L1 Knee 1 Kojun Tsuge. If it is the area detection mode, jump to the area detection mode routine as shown in step 23. If it is the document detection mode, jump to step 1.
Proceed to step 5 and obtain the A/D conversion value of the COD image sensor output.
By comparing the set threshold level values, it is determined whether the document is located at the position on the document table 12 indicated by the current line counter and clock counter values. If there is no original, the process jumps to step 18, and if there is a original, the process goes to step 16. In step 16, the clock fist counter value X m a X 1 is stored in the buffer. This value is updated every time there is a document in one line, and eventually, the value of the clock counter at the time of the data for which it was determined that there was a document in that line is the value for each line. Everything will be memorized line by line.

Next, in step 17, all the lines processed so far, the maximum and minimum clock counter values Xmax and Xm1n when it is determined that there is a document, and the maximum and minimum values of the line counter Value, Ymax, Ymi
Compare 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 CCD image sensor output is stored in a buffer for one line. In step 19, it is determined based on the value of the a-task counter whether data processing for one line has been completed, and if it has not been completed, the sample point, which is the collection position of AE data, is updated in step 20, and then the step , 21 to extract the interrupt program. If it has been completed, in step 24, among the A/D conversion values of the COD image sensor output for one line, the data from the first data determined to contain a document to the last data determined to contain a document is calculated. AE data counters corresponding to the maximum and minimum values are counted up. However, if an area for AE data collection is set, the AE data counter will only be counted within that area.
Do an up.

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, remove the interrupt program from 21.

FIG. 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.
It is determined by the flag whether it is the first step in FIG. Step 30. 21 in FIG. 21, respectively. 3rd゜4th. Determine whether it is the fifth stage based on the flag, and if YES in each case, step 36. Step 37゜Step 38. 5EQ2 as in step 39.

5EQ3.5EQ4.5Jump to EQ5 routine. If NO, proceed to the next step.

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 area 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 level value, and it is determined whether the document is at the position on the document table 12 indicated by the current line counter and clock counter values. Please judge. 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 CD image red sensor output is compared with the set threshold level value to determine whether it is the level of dark spots. If the level is not black, the process jumps from step 48 to step 40 in FIG. 24. If the level is black, the flag is set to the third stage in step 47, and the process jumps from step 48 to step 4o in FIG.

When the process jumps to step 49, it is similarly determined in step 50 whether there is a document, and if there is no document, step 5
3 and jump to step 40 in Figure 24. If there is a document, proceed to step 50, and set Xm1n, Xmax, Ym
in.

Compare and update the values of Y and max with the current line counter and clock counter values.Next, in step 52, set the flag to the fourth stage, jump from step 53 to step 40 in FIG. 24, and jump to step 54. If the level is black, it is similarly judged in step 55, and if the level is not black, the process jumps from step 57 to step 40 in FIG. 24, and if the level is black, the flag is set to the fifth stage in step 56. From there, the process passes through step 57 and jumps to step 40 in FIG.

If the process jumps to step 58, it is determined in step 59 whether or not there is a similar original, and if there is no original, step 62
Then jump to step 40 in FIG. 24. If there is a manuscript, in step 60 Xm1n, Xmax, Ymin,
Compare Ymax with the current line counter and clock counter values and update. Then, in step 61, the flag is set to the sixth stage, and then the process jumps to step 40 in FIG. 24 through step 62.

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 the 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, a 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 is fixed to high, interrupts are disabled in step 68, AE data is created in step 69, the interrupt program is extracted in step 72, and if it is determined in step 66 that the program has not been completed, step 70 Step 7 sets the sample point and one line end value, initializes counters, etc. in step 71, and exits the interrupt program in step 72.

FIG. 27 shows the main flow of a document detection and area recognition program when using page 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 the tree flowchart is executed from step 1. In step 2, various counters (clock-counter, line-counter) etc. on the RAM are first initialized. In step 3, the CCD image is
0--s--+-i4 and 74-1 miR random J-1#m,,
'Ki1--tfi4M4iJ, reference clock φ・408
, and the clock pulse A/D of the A/D converter
In this embodiment, both clock pulses are oscillated by the timer function (with interrupt function) built into the microcomputer 406.
Next, in step 4, the optical system home position signal 405 is
If a signal is detected, the process advances to step 5, and this time, the process waits for a picture head signal 406.If a zero picture head signal 405 is detected, an interrupt is enabled in step 6. Then, in step 7, wait until the document or area detection completion flag is set, and if it is set, step 8
, the COD output data on the page memory is sequentially read out, and in step 9 it is determined whether or not it is in area A (FIG. 21), and if so, in step lO, the AE data counter corresponding to the data in area A is set as follows. AE data e corresponding to the data in area B (FIG. 21) is counted up and if it is not in area A, in step 13.
Count up the counter. And step 11
Steps 8 to 11 are repeated until all data have been processed, and once the processing is completed, step 12 is skipped 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.

Then, in step 16, it is judged from the value of the clock counter whether it is the timing to output the shift pulse 407, and if the timing is right, the process jumps to the sh line as shown in step 27. If not, the process jumps to the sh line as shown in step 27. Is the currently running program causing multiple interrupts?
Judge by flag. Step 2 if multiple interrupts
The program jumps to step 6 to extract the interrupt program, and if not, the program advances to step 1B, where it is determined whether the data is at the read position or not by comparing the sample point value and the clock counter value. 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 the area detection mode is selected, the process jumps to the area detection mode routine as shown in step 28. If the document detection mode is selected, the process proceeds to step 20 where the A/D conversion value of the CCD image sensor output and the certified threshold level value are obtained. By comparing , it is detected whether or not the document is located on the document table 12 at the position indicated by the current line counter and clock counter values. 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 conflict counter is stored as X m a x 1 in the buffer. 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 that was determined to have a document is the value for each line. Everything will be memorized.

Next, in step 22, all the lines processed so far and the clock at the time of the data judged to have a document are
Maximum value, minimum value Xmax, Xm1n of counter value, maximum value, minimum value, Ymax of line φ counter value
, Ymin and the current values of the clock counter and line counter, and update if necessary.

Next, in step 23, the A/D converted value of the COD image salary 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. In the case of 1-Kinryo 1-, in step 29, Xm is the last data of the A/D conversion values of the CCD image sensor output for 1 line that indicates that there is a document.
The value of axl 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.
The flag determines whether it is the first step in the diagram.

If it is the first step, jump to the 5EQI routine as shown in step 39, and similarly step 32, step 33. Step 34. 21 in FIG. 21, respectively in step 35. 3rd゜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 like step 43.

Jump to the 5EQ3.5EQ4.5EQ5 routine, and if No, proceed to the next one.

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. Step 41゜Step 42. From step 43, step 45 of this figure. Step 49. Step 53
．． Step 58. Jump to step 62.

Jumping to step 45, in step 46 C
The A/D conversion value of the OD image sensor output is compared with the set threshold e level value, and it is determined whether the original is at the position on the original platen 12 indicated by the current line counter and clock counter values. Please judge. 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 φ sensor output is compared with the set threshold level value, and it is determined whether the level is black. If it is not at the level of black spots, the process jumps from step 52 to step 44 in FIG. 29. If it is at the level of black spots, the flag is set to the third stage in step 51, and 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 Xmin, Xmax, Y
min.

Ymax value, current line e 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 it is the level of the black speck, and if it is not the level of the black speck, the process jumps from step 61 to step 44 in FIG. is set to the fifth stage, and then passes through step 61 and jumps to step 44 in FIG.

When the process jumps to step 62, it is similarly determined whether or not there is a document, and if there is no document, the process jumps to step 66 and then to step 44 in FIG. 29. If there is a document, in step 64, Xm1n is executed.

Compare Xmax, Ymin, and Ymax with the current values of the line e counter and clock Φ counter and update them. 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.

As shown in step 27, the process jumps to step 67 in the figure. Then, in step 68, a shift pulse 407 is outputted at the timing shown in FIG. In step 69, the line number 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 The output of 407 is fixed at high level, interrupts are disabled in step 72, AE data is generated in step 73, and the interrupt program is extracted in step 76.

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 φ point and l 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 a sequence requires dimming for the CCD image sensor, a program according to this flowchart is executed. Starting from step 1, in step 2, the lamp is first turned on by a lamp on/off signal. At this time, the dimming data takes a preset value at step 3.
Reference clock φ408, A/D converter clock/D CLK413, shift pulse s
h, 407 is output and the CCD image sensor is driven. In step 4, it is determined whether an overflow has occurred based on the A/D converted value DATA 414 of the output of the CCD image sensor. If overflow has occurred, proceed to step 5 and dimming data 417
Counts down by 1, returns to step 4, and continues this loop until there is no overflow. If no overflow is seen in step 4, proceed to step 6, and count up the dimming data by 0. Next, in step 7 Check for overflow and return to step 6 until overflow occurs. When an overflow occurs, the process proceeds to step 8, where the dimming data is stored, and the dimming program is stored in step 9. Next, a method for writing characters on copy paper will be explained with reference to the drawings. In FIG. 33, 1 is a photosensitive drum that rotates in the direction of arrow A in the figure.

Reference numeral 12 denotes a document table glass, and 45 denotes a moving optical system (scanner) that moves in the left and right directions in the figure. Reference numeral 14 denotes a lamp for document verification, which moves together with the moving optical system 45. Arrow B indicates the optical path.

23 is a blank exposure unit (erase means);
FIG. 34 shows 23 blank exposure units, 701a is a fine I, ED, high density, for example 4
A plurality of photosensitive drums are arranged in an array at the order of ciot/mm.
are arranged along the axial direction (hereinafter referred to as LED array 7).
01), and a SELFOC lens array (not shown) is disposed above it for focusing the light from the LED 701 onto the photoreceptor. 702a is a relatively large LE
D, and a plurality of LEDs are arranged along the axial direction of the photosensitive drum 1 at a pitch of, for example, 2.5 mm (hereinafter referred to as blank LEDs 702).

In FIG. 35, 705 is a slit device provided in the moving optical system 45, 704 is a slit, and 703
is a continuous material, 708 is a slit device 705 and a continuous material 703
The connecting member 703 is a spring connected to the rod 707.
is connected to solenoid 706. When the solenoid 706 is energized, the connecting member 703 moves along the broken line 7 in the figure.
Move to position 03', connect part of slit 704,
It is designed to cut out part of the light that is exposed to the original. On the other hand, when the solenoid 706 is de-energized, the force of the spring 708 causes the connecting member 703 to return to the position indicated by the solid line in the figure, so that it no longer blocks exposure of the original.

FIG. 36 shows the irradiation area on the drum l by document exposure, blank LED, and LED array.

730 is an area illuminated by the LED array.

731 is an area illuminated by a blank LED, 732
733 is the document exposure irradiation area when the solenoid 706 is not energized, and 733 is the original Q Wi light irradiation area when the solenoid 706 is energized. 730 and 731
The areas 730 and 733 overlap to some extent. Further, the side marked with a mark in the figure is the reference side for transferring the transfer paper, and the paper is conveyed with the edge of the paper aligned here, regardless of the paper size. Therefore, by arranging the LED array 701 on the reference side of the transfer paper, it is independent of the size of the transfer paper and the transfer magnification.

You can write any characters, etc.

Regardless of image exposure, a white latent image is formed in the area 730 if all the LED arrays 701 are lit, and in the area 731 if all the blank LEDs 702 are lit. Also, if the solenoid 706 is not energized and the LED array 701 and blank LED 702 are all turned off during document exposure, 7
A latent image of the document is formed over the entire area 32. On the other hand, when exposing the original, the solenoid 706 is energized and the blank LED 7 is turned on.
When the light 02 is turned off, a latent image of the document is formed in the area 733. Furthermore, since no light from exposure of the original is incident in the area 730, a latent image of a pattern such as a desired character can be formed by synchronizing the LED array 701 with the process speed and sequentially and selectively turning on the LED array 701. I can do it. Note that writing a pattern such as a character by selectively lighting the LED array 701 is called a writing mode.

FIG. 37 shows the state after transfer when patterns such as characters are formed on copy paper (transfer paper).

The arrow indicates the direction of movement of the transfer paper 734, desired characters (patterns) are copied in the area 735, and the original image is copied in the area 736. FIG. 38 shows an example of a lighting pattern of the LED array 701, and in FIG. 38, 8×8 dots are shown for ease of explanation. In the figure, 1 indicates the lighted state of the LED, and 0 indicates the lighted off state. 1 to 8 in the diagram are LEDs
With individual LEDs in array 701.

The arrow indicates the time series (time t). FIG. 39 shows a timing chart for creating patterns such as characters.

In this example, the number "2'" will be written.

Furthermore, if a pattern obtained by rotating the pattern shown in FIG. 38 is provided, for example, the II 211 can be rotated at various angles to write.

FIG. 40 shows an operating unit for actually executing a write operation using the LED array 701.

Incidentally, this operation section may be provided in the operation section shown in FIG.
50-755 LED display element, 756 is dot matrix LCD (liquid crystal display), 7
57 to 764 are key switches; key 757 in the figure;
758.

Reference numeral 759 is a mode designation key for selecting what to write. When key 757 is pressed, LEDs 7 and 50 light up, making it possible to write the date. Furthermore, when the key 758 is pressed, the LED 751 lights up, allowing the page to be written. When the key 759 is pressed, the LED 752 lights up and it becomes possible to write a serial number.

The key 760 is a key to set the numerical value to l'' when in the page and serial number writing mode.The key 761 is a key for specifying the position and direction of writing characters, and as shown in FIG. The key and direction can be specified.Each time the key is pressed, the states from 41-1 to 41-6 are rotated.By this, by changing the direction in which the original is placed, the key can write characters on the desired edge. When 762 is pressed, the LED 753 lights up and the written characters become negative.

For example, if the light emission pattern "1""O" in FIG. 38 is reversed, "2" is written in white on a black background. key 7
Press 63 to change the color of the characters to be written and the original part. When the key 763 is pressed, the LED 754 lights up. 764 is a key pressed when writing (designating write mode), and LED 755 lights up.

By pressing this key again, the LED 755 turns off and the write mode is canceled. Reference numeral 756 is an LCD that displays written contents, and for example, when in date mode, the date is displayed. Also, when the position and direction are changed using the key 761,
It will be displayed in the corresponding position and direction.

This situation is shown in FIG. In the figure, 42-1 to 4
2-6 corresponds to the writing positions of the transfer paper 41-1 to 41-6 shown in FIG. 41 described above. 756 is the aforementioned L
It's a CD.

FIG. 43 shows an example of a control circuit for writing characters and patterns in this embodiment, in which 770 is a CPU (central processing unit) consisting of a microprocessor, 771 is a CPU
LCD driver connected to U771, 756 is the aforementioned L
It's a CD.

780 is the aforementioned key switch 757-764°780b
is LED driver, 780a is LED 750-755
It is. 781 is a tire circuit that functions as a clock. 772 is a drive circuit for driving the LED array 701, and is capable of selectively lighting each of the minute LEDs. 774 is a drive circuit for driving the blank LED 702, and each LED of the blank LED 702 can be turned on arbitrarily under control from the CPU 770.

776 is a solenoid drive circuit, and 706 is the aforementioned solenoid. 778 is a lamp lighting circuit for lighting the lamp 14.

The solenoid 706 and lamp 14 can be turned on and off under the control of the CPU.

First, a mode in which writing of characters, etc. is not performed will be explained.

The time chart is shown in FIG. 44. When the copy starts, the drum starts rotating and the blank LED 702. L
ED array 701 lights up. Lamp 14 after the end of the previous rotation
lights up, and the optical system 45 starts moving forward. After a time Tl corresponding to the distance between the optical axis and the blank unit from the image tip signal output from the sensor 30, the blank LED 702, L
When the ED array 701 is turned off, image exposure is performed on the photosensitive drum and formation of a latent image is started. When the optical system reaches the inverted position, the lamp 14 is turned off and the blank LED 702 is turned off.
．． The LED array 701 is turned on. This prevents unnecessary images from being formed when the optical system moves backward. When the optical system is reversed and returned to the home position, one cycle ends.

Next, the operation for writing characters on the leading edge of the transfer paper as shown in FIG. 41-1 will be explained.

Figure 45 shows the time chart. The shaded area in Figure 0 is L.
This shows that the ED array 701 is selectively turned on. Blank LED 702, LE due to copy start
The D array 701 lights up and performs forward rotation. At this time, the solenoid 706 is energized. The optical system starts moving forward. After T1 time from the image tip signal, the blank LED 702 turns off and the LED array 701 turns off. Selective lighting begins synchronously, forming a character latent image. At time A when a predetermined character has been formed, the LED array 701 is fully lit and the solenoid 706 is turned off. After 12 hours from timing A (time that takes into account the response of the solenoid), the LED array 701 is completely turned off, and the original image is also copied onto the edge of the transfer paper. This sequence prevents unnecessary stains from occurring at the border between the text area and the original area at the edge of the copy paper. When the optical system reaches the inverted position, the lamp 14 is turned off, and the blank LED 702 and LE
The D array 701 is fully lit. One cycle ends when the optical system returns to its home position.

Next, the operation when writing characters on the trailing edge of the transfer paper will be explained. The time chart is shown in FIG. 46. When the copy starts, the blank LED 702 and the LED array 7
01 lights up and performs forward rotation, lamp 14 after completion of forward rotation
lights up and the optical system moves forward. After T1 time from the 0-picture ahead signal, the blank LED 702 and the LED array 701 go out. Furthermore, T3=((transfer paper size - character length)/
After the process speed - T2) time has elapsed, solenoid 7
06 is turned on, and the LED array 701 is fully lit.

Further, after time T2 has elapsed, the LED array 701 is synchronously and selectively started to light up to form characters and the like. When the optical system reaches the inverted position, the lamp 14 is turned off, the blank LED 702 and the LED array 701 are all turned on, and the solenoid 706 is turned off. When the optical system 45 returns to its home position, one cycle ends.

As described above, desired characters can be written on the front or rear of the transfer paper. Furthermore, by changing the writing timing of characters, it is also possible to write characters in the middle of the transfer paper.

A timing chart in this case is shown in FIG. When the copy starts, the blank LED 702 and the LED array 701 light up. After the previous rotation is completed, the lamp 14 is turned on and the optical system starts moving forward. After time T1 has elapsed since the image tip signal, the blank LED 702. The LED array 701 turns off, and a latent image begins to be formed over the entire surface of the document. After 19 hours corresponding to the writing position have elapsed, the solenoid 706 is turned on and the LED array 701 is fully lit. Further, after the elapse of time T2, the LED arrays are sequentially selectively turned on to form a desired character latent image. After forming a predetermined character latent image, the solenoid 706 is turned off and the LED array 701 is turned on. After time T2 has elapsed, LEr) array 701
Turn off the light and start exposing the edges of the document again. When the inversion position is reached, the lamp 14 turns off, and the blank LED 702,
The LED array 701 is fully lit. One cycle ends when the optical system returns to its home position.

Next, each mode of writing contents will be explained.

(When in date mode, always write the date of the day.) When in page mode, after copying a predetermined set number of sheets for one document, one page is transferred. Therefore, each time the original is replaced, the page number written is 1.
The pages will be uploaded one by one, and a predetermined number of pages will be automatically written on the transfer paper.

Also, in the case of serial number mode, when copying a predetermined set number of sheets for one original.

The serial number is incremented for each sheet, and reset to ``t'' when copying of the next original is started. Therefore 1
Sequential numbers will be automatically numbered for each copy of the original. Furthermore, successive numbers can be automatically written sequentially from 1 to the next copy of the original. FIG. 48 shows a flowchart after copy start.

In FIG. 48, the write register is a register for storing data related to various modes, and the contents set here are written on the transfer paper by the LED array 701 as described above. There is. The PAGE register is a register for storing page numbers.

Also, this register is set to "l" at the initial time and when the page mode is newly switched.First, the operation in the date mode will be explained.In step 800, it is determined whether the mode is the date mode or not. is determined, and since it is YES here, the date is set in the write register in step 801.In step 805, it is determined whether one cycle is completed, and the loop of step 805 is repeated until the result is YES.When one cycle is completed, step 806 The process proceeds to Step 80B, and it is determined whether or not it is the serial number mode.In this case, the answer is No, so the process proceeds to Step 808.In Step 80B, it is determined whether or not the set number of sheets has been completed, and if No, Steps 805 to 806
Repeat the loop from ~808.

When the set number of sheets is completed, the process advances to step 809, where it is determined whether or not the page mode is in effect.In this case, since the answer is NO, the series of processes ends.

Therefore, in the date mode, the date is always set in the write register, and the date is written in a predetermined position above the transcription.

Next, the case of page mode will be explained.

It is determined NO in step 800 and YES in step 802.
Since it is judged as S, the process proceeds to step 803, where the contents of the PAGE register are set in the write register.For example, if the write register is immediately after changing to page mode νJ, "1" is set in the write register. Then, in the same way as described above, the loop of step 805 is repeated until one cycle is completed. After completing one cycle, steps 806 to 808 are performed.
Then, it is determined whether or not the set number of sheets has been completed. The loop from step 805 to step 806 to step 808 is repeated until the set number of sheets is completed. Step 8 after setting the number of sheets
The process advances to 09 and it is determined whether the page mode is selected.

In this case, the answer is YES, so the contents of the PAGE register are set to 1''.
is added, the value of the PAGE register is incremented, and the post-processing ends.

Therefore, in the page mode, the same number is always written for the set number of sheets of the same document (in this case, it is "1"). When the first copy command is input, the process proceeds from step 800 to step 802 to step 803, and the number added by "1" from the previous time (in this case, "2") is added.
is set in the write register, and "2°" is written on the transfer paper.

Next, the case of serial number motes will be explained.

When copying is started, the process proceeds from step 800 to step 802 to step 804, and the data is put into the write register. ■After the cycle ends, it is determined in step 806 whether or not it is the serial number mode. Since the answer is YES here, the process proceeds to step 807, and the contents of the write register are
'' is added to become ``2''. The loop of steps 808 - 805 - 806 - 807 is repeated until the set number of sheets is completed, and the number written on the transfer paper is incremented every cycle. When the set number of copies have been completed, the process moves to steps 809 to END and the process ends. Therefore, in the serial number mode, numbers are written sequentially starting from ■ for the set number of sheets of the same original. Similarly, for a series of copies, numbers are written in order starting from 1.

Next, a two-color mode, that is, a case where the colors of the writing area for characters and the like and the original image area are changed will be explained.

In this case, the written portion is first exposed (at this time, the blank LED 702 is lit) and developed in red.

Thereafter, the document is exposed to light using a multiplex copying mechanism (at this time, the portions that have already been written are rendered white by the LED array 701), and the document is developed using a black developer.

FIG. 49 shows a timing chart for two-color mode.

The drum rotation starts with the copy command, and blank L
ED702. The LED array 701 is turned on. After the previous rotation is completed, the LED array 701 is sequentially and selectively turned on while the blank LEDs 702 remain fully lit to form a latent image of a pattern such as a character for a period of time T4. Further, at this time, while the red developing device performs development, if the registration roller is started at an appropriate timing, the characters appear in red at the desired position on the transfer paper. In this sequence, the optical system 45 does not perform scanning, and the lamp 14 does not light up.

Next, the transfer paper on which characters have already been written is stored in the intermediate tray, and the second copying sequence begins. The optical system 45 starts and the lamp 14 lights up. Blank LE at this time
D702, the LED array 70-1 becomes blank after T1 time has elapsed since the output of the 0-pixel signal that is turned on.
2 is turned off, and after the time T4 in which the next character was written has elapsed, the LED array 701 is turned off. When the optical system reaches the inverted position, the lamp 14 goes out and the blank LED 70
2. The LED array 701 lights up. When the optical system 45 returns to its home position, one cycle ends.

The following configuration can be considered as another embodiment. In the above-described embodiment, the LED array for writing patterns such as characters also served as a black eraser for unnecessary image areas. However, at present, LED arrays with high dot density are
The amount of light is small compared to ED, etc. Therefore, for example, when backing up the optical system, there is a difference in the amount of light irradiated to the drum when the LED array and blank LED are used to erase black, and there is no unnecessary light on the photoreceptor. There may be cases where charges remain. In other words, after continuing the write mode for a long time, it becomes impossible to obtain a proper image.

To solve this problem, an LED array for pattern writing and a blank LED for erasing black may be provided independently.

FIG. 50 is a drawing of the vicinity of the drum, where 1 is the drum, 980 is a blank LED for erasing black, and 981 is an LED array for writing. Figure 51 shows black eraser blank LE0980.
In this example, LEDs 990 are arranged at a pitch of 2.5 mm.

FIG. 52 shows the irradiation area on the drum surface.

The blank LED 980 for blackening can illuminate a range 991, that is, the entire surface of the drum. On the other hand, the LED array 981 can only illuminate an area 992 in the figure. Here, the case where characters are displayed on the leading edge side of the transfer paper will be explained.

FIG. 53 shows the timing chart.

Blank LE0980 lights up when the copy starts,
Solenoid 706 is energized. After the pre-rotation is completed, the lamp 14 is turned on and the optical system 45 moves forward.

After time T1' has elapsed since the image tip signal, the blank LED 98
0, the LED array 981 is completely lit at the same time as it is turned off. After a time T5 corresponding to the distance between the blank LED 980 and the LED array 981 shown in FIG. 50 has elapsed, the LED array 981 is sequentially and selectively turned on to start forming a character latent image.

At the time B when writing a predetermined character is finished, the LED array 9
81 is fully lit and the solenoid 706 is turned off. Response time and optical axis of solenoid 706 - LED array 9
LED after the elapse of time T6, which is the sum of the travel time between 81 and 81.
All arrays 981 are turned off. When the optical system reaches the inverted position, the lamp 14 goes out and the blank LED 980 lights up. One cycle ends when the optical system returns to its home position. In this way, by providing a blanking means for blackening and a separate pattern writing means, when an unnecessary image disappears, such as when the optical system moves backward, the drum is irradiated with uniform light and a good image can be obtained.

Moreover, with this configuration, the following can also be done.

As mentioned above, this method uses the multiple copy mode to overlap text and original images. As mentioned above, the amount of light from the LED array tends to be insufficient, so if the process speed is determined based on the performance of the LED array, the specifications of the entire machine will deteriorate.

The above drawbacks can be overcome by changing the process speed during character writing and the process speed during document exposure.

An example of outputting characters on the leading edge of the transfer paper will be described below.

First, the character writing cycle is performed at a relatively low process speed, and then the document is exposed at a relatively high process speed and multiple copies are made. Figure 54 shows the timing chart. In Figure 0, the shaded area is a blank LED 980. shows a state in which only the irradiation area 992 shown in Fig. 52 is off, and the horizontal line indicates a state in which only the irradiation area 992 shown in Fig. 52 is lit. The drum starts rotating at the same speed, and the blank LED 980 and LED array 981 light up. At this time, the high voltage output is output at a value for low speed. When the forward rotation is completed, a portion of the blank LED 980 goes out.

After time T5 has elapsed, the LED array 981 is sequentially selectively turned on and begins to form a character latent image. At the 0 point where the output of the predetermined character is completed (after T7 has elapsed), the blank LED 980. L.E.
The D array 981 is fully lit. After 16 hours,
All LED arrays 981 are turned off. The registration roller is turned on at a predetermined timing, and characters are formed on the leading edge of the transfer paper. Once the transfer paper reaches the intermediate tray, the next sequence begins and the drum begins rotating at a relatively high process speed. Also, at this time, the high voltage output is output at a value for high speed. When the forward rotation is completed, the lamp 14° is turned on and the optical system 45 starts moving forward from 0 pixels ahead, and after a time T1 has elapsed, the blank LED 980 is turned off except for a part.

T8=T7 + After T5 time, blank LE0980
All lights go out. Through this sequence, a blank latent image is formed in the area where the characters were written in the first cycle, and the characters can be clearly written regardless of the original. After that, when the optical system 45 comes to the inverted position, the lamp 14 is turned off and the blank LED is turned off.
Turn on 980. After that, the optical system returns to the home position and one cycle is completed.

Further, in the above embodiments, the pattern writing LEDs were provided only in a part of the image area, but of course they may be arranged over the entire image area.

In addition, a mechanical shutter was provided in the slit as a means to block exposure of one image, but this shutter may be located near the photoreceptor, or may be a shutter used with a liquid crystal, or an LED array may be used as a writing light source. Although we used a light source and a liquid crystal shutter, it is also possible to use a light source and a liquid crystal shutter.

-Next, the image composition mode will be explained.

In this embodiment, an example will be described in which an A4 size double-sided document is transferred to an A3 size document and images are synthesized onto one side of a photographic material.

After setting the original on the RDF 9, press a predetermined key on the operation unit 11 to separate (do not overlap) two images of the double-sided original on the same side of one transfer material from the double-sided original and form images. Set the mode to perform. After selecting the cassette containing the A3 size transfer material, turn on the copy start key.

The original 10 set on the RDF 9 is conveyed and set at an image reference position on the original glass 12. The situation is shown in FIG. 55(a).The original set as shown in FIG. 55(a) performs the same operation as in the multiple copy mode described above and completes the copying operation for the first side. The top 12 originals 1O are conveyed onto the original table again via the switch packs of paths D, E, and F of the RDF 9. The situation is shown in Figure 55 (
b) As shown in Figure 55(b), the original is A4
It is moved by the size and set, and the copying operation is performed like the second operation of the above-mentioned quick copying of the page, that is, after the 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 (width of A4 size) to erase the potential of unnecessary portions caused by scanning of the optical system.

After time T2 has elapsed, the eraser lamp is turned off and a latent image on the second side of the document is formed on the photosensitive drum. Intermediate tray 8
The transfer material fed by the paper feed roller 37 is conveyed via the conveyance path G to the front of the registration roller 28. Further, the registration roller 28 is driven after a predetermined time T3 after the one-picture ahead detection sensor 30 is turned on, and the transfer material is sent out in the direction of the photosensitive drum 1 with accurate timing.

As a result, the leading edge of the latent image coincides with the center of the transfer paper, and a composite image is formed. Thereafter, as described above, after the transfer process, the fixing operation is performed to complete the copying.

Fig. 55 explains the case where the characters "'A/B" are written on the front and back sides of the original. First, the characters "°A" are copied on the first half of the transfer material, and then " The characters B11 are copied on the latter half of the transfer material.

In this embodiment, a composite image is finally formed on the transfer material as shown in FIG. 55(C).

A description of the 56th mine 1. This is a timing chart for performing an operation of combining both images. When the copy start key is pressed, the RDF 9 transports the original 10 to a predetermined position on the original glass 12, turns on the main motor 4, and rotates the drum 1. After the original is set at the image reference position, the first copying operation in the multiple copy mode is performed as described above, and then the original is ejected once by RDF (D) and transferred to the original glass 12 via switchback paths E and F. Reset the back side of the original on top. At this time, either the original is set at a predetermined time interval from the image reference position and the second side copying operation in the multiple copy mode is performed as described above, or the difference is that the original is set at a predetermined time interval from the image reference position, or the copying operation for the second side in the multiple copy mode is performed as described above.
The time is 1 hour by turning on the eraser lamp, erasing unnecessary charges on the drum, and preventing excess toner from accumulating.
The resist 28 is activated at timing 3.

Also, at this time, the optical system performs an A3 size scan, and in the second half of the scan, the original is exposed to light to obtain a composite image.

Below 1. As explained in Theory 1 and 1, in this embodiment, the multiple copy mode is used to perform 611 embedding of the desired pattern, but the process speed is set to low speed during the pattern + jj embedding cycle, and the process speed is set to low speed during the original copying cycle. Since the process speed is set to high speed, it is possible to prevent the extremely low copying speed and obtain the copied image shown in Figure 9. In addition, using an inexpensive light source, it is possible to realize 1:7.

Moreover, by having a plurality of developing units and changing the developing color between the pattern+Q cycle and the original copying cycle, a copy T with a vivid appearance can be obtained.

〔effect〕

As explained above, according to the present invention, it is possible to prevent low copying of the process speed when copying an original, and to reduce the number of pages due to the simple structure. patterns can be formed on the recording medium.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the configuration of an embodiment of a copying machine to which unreleased IJ is applied, Fig. 2 is a block diagram of a circuit that determines the process speed, Fig. 3 is a timing chart of the entire device, and Fig. 4 is a timing chart of pre-rotation, Fig. 5 is a timing chart of potential control, Fig. 6 is a CCD dimming, CC
7 is a timing chart for scanning, FIG. 8 is a timing chart for post-rotation, and FIG. 9-1 is a perspective view showing an embodiment of a copying machine to which the present invention is applied. Figure 2 is the second figure of the manuscript table, No. 1.
Figure 0 is a parent diagram of the operation unit, Figure 11 is a block diagram showing the configuration of the display unit, Figure 12 is a block diagram of the input unit,
Figure 13 is a block diagram of the LED array drive circuit,
FIG. 4 is a diagram showing how the LED array is turned on, FIG. 15 is a color detection circuit diagram of a developing device, and FIGS. 16-1 to 16-3 are a flowchart showing an embodiment of the present invention. -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, FIG. 32 is a sequence flowchart for dimming, and FIG. 33 is a diagram showing the relationship between the moving optical system and the photosensitive drum.
FIG. 34 is a detailed diagram of the blank exposure unit, FIG. 35 is a diagram for explaining the slit device, FIG. 36 is a diagram for explaining the irradiation area on the photosensitive drum L, and FIG. 37 is a diagram for explaining the character shade on the transfer paper. FIG. 38 is a diagram for explaining the state in which the pattern is formed.
39 is a drive timing chart of the LED array, FIG. 40 is a diagram showing an example of the operation section of the copying machine δ, and FIG. 41 is a pattern on the transfer paper;! A diagram to explain the position and direction of J, Figure 42 is the LCD display!
FIG. 43 is a control circuit diagram for including pattern 3 in this embodiment, FIG. 44 is a time chart showing normal copying operation 5, and FIGS. 45 and 46.
Figure 47 is pattern 6! ) Figure 48 is a time chart for explaining the IJJ movement, and the pattern is -! ), and FIG. 49 is a time chart for pattern 8 inclusion in two-color mode. Fig. 50 is a diagram showing an example in which an LED for pattern 8 is separately provided, and Fig. 51 is a blank LED, an LED.
Arrangement diagram of the array; FIG. 52 is a diagram for explaining the irradiation area on the photosensitive drum L; FIGS. 53 and 54 are timing charts for pattern writing; FIG. 55(a)
, (b) and (c) are diagrams for explaining an example of copying a double-sided original onto different portions on the same side of transfer paper [11], and FIG. 56 is a timing chart of the composition mode. 1 is a photosensitive drum, 3 is a fixing device, 6 and 7 are developing devices, 8 is an intermediate tray, 18 is a COD for document detection, and 701 is an LED
Array 702 is a blank LED.

Claims (1)

[Claims] A copying apparatus having f stages of document exposure and forming a copy image on a recording medium by exposing the document by the document exposure means, the pattern writing having a plurality of light sources to form a desired pattern on the recording medium. means for forming a desired pattern using the pattern writing means in a first image forming cycle and forming a copy image using the original exposing means in a second image forming cycle. A copying device characterized by: