JPS61205957A - Copying device - Google Patents

Abstract

PURPOSE:To copy easily both faces of plural originals by changing colors, by copying an image obtained by the first and the second scans of a scanning means, to the surface and the reverse side of one sheet of recording paper. CONSTITUTION:An original 10 which has been set to an RDF 9 is carried onto original glass 12 and irradiated by an illuminating lmap 14, and its reflected light is scanned by scanning mirrors 13, 15, an image is formed on a CCD 18 through an original detecting lens 17, and also the image is formed on a drum through a projection lens 16 and a mirror 20. An electrostatic image is developed by a block developing device 6, and transferred onto a transfer paper by a transfer device 31. The transfer paper which has been separated by a separation electrifier 32 from the drum is fed to a both face unit 35 by a flapper 34 through a fixing device 3, and fed to a intermediate tray 8 through a carrying paths B, C. On the other hand, the original 10 on an original platen 12 is reset so that the reverse side is copied by paths D-F, and after the optical scan, the development is executed by a different developing device 7, and it is transferred to the reverse side of the transfer paper which is carried through a carrying path G and a resist roller 28 from the tray 8.

Description

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

[Prior art]

Conventionally, when making double-sided copies of multiple images (for example, two originals with different colors), one sheet of the original was set, the copy was made, the original and developer were replaced, and the first copy was manually fed. The operation was very cumbersome, and the user had to be very careful about the orientation and side of the copied paper.

〔the purpose〕

The present invention has been made in view of the above points, and an object of the present invention is to provide a copying apparatus that can easily make double-sided copies of a plurality of documents in different colors.

〔Example〕

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

Figure 1 shows a double-sided copying machine to which Invention 8 is applied and RDF9 (self-mapped).
FIG. 2 is a cross-sectional view showing an embodiment in which a paper feeding device (paper feeder) and a soda 39 are housed. In addition, instead of RDF9, there is also a pressure plate 90 set, and in each of these configuration diagrams, the second side of the drum 1 is made of a seamless photoreceptor using Asj, and oilE (1@
When the power is turned on using the switch 2, the fixing device 3 is heated, and when the temperature reaches a predetermined temperature, the main motor 4 turns on the drum 1 and wire section.

B, O and the fixing row 2-5 start rotating in the direction of the arrow. When a predetermined value is reached, it is determined whether or not there is toner in the control unit (mtA) and the JA appliances 6 and 7, which will be described later. Then, the main motor 4 stops, the meta 7 goes into a standby state, and waits for a copy start signal.

First, we will briefly explain the copying modes that can be performed by the copying machine of the present invention, and then we will explain the copying process sequentially. It is possible to operate in a double-sided copying mode in which images are formed and then ejected, and in a high-production copying mode in which images on one side of the transfer paper are combined and discharged. Use this to make copies. Also, multiple #4. T! By having an angle of 6°7, copies can be made on transfer paper in multiple colors.

In addition to detecting the AM size, it also has AMS (automatic magnification change) and PS (automatic cassette selection) functions, and is equipped with a zoom function and the like.

(Double-sided copy mode) First, the process of obtaining a double-sided copy from the double-sided original bucket 1 will be explained. i) F 91 After setting the original 10, perform double-sided copying from the double-sided original using the operation section 11, which will be described later.
Input ey, select the number of copies, and press the copy start key for the stage specifying the black color current sensor 6 of the 81 tVa device. I:i, original set to DF9, till
The lO is filtered onto the original glass 12.

In addition, in Kimoto, four structures n, r are integrated with the first scanning mirror 13.
, = illumination rung 14 '2-4i semi-fla 924C, , Kan Iwariki (described later), and Hara Oke Kichiyo C
Controls the input source of OD (details will be described later).

Next, the source 410 is illuminated by the illumination lamp 14 which is integrated with the first running mirror 13, and the reflected light is reflected from the first running mirror 1:l; It will be scanned. By moving the first scanning mirror 13 and the second scanning mirror 15 at a speed of 1:1/2,
Projection lens 16. The document is scanned while keeping the optical path length in front of the document detection lens 17 constant. In this way, the above-mentioned reflected light source illuminates the detection element 00D18 through the document detection lens 17 and the projection lens 16. Third mirror 19. 4th Mi 9-208
On the other hand, after being removed by the pre-exposure lamp 21, the drum 1 is exposed to a corona (for example, exposed). Thereafter, the light beam irradiated from the illumination tube 141 is exposed to slit light, and a light beam is formed. still,
During the original size inspection scan, the tracer y/p 23 erases the 41 and the AO portion of the current 4 bias is omitted.
This applies a bias to prevent toner from adhering to F'F"L, Do, and the reflected light on the original glass 91 is sent to the original 41H5f report to the original Taze inspection @ Yuko 0OD18. Although there are many inputs, the structure is configured so that the reflected light in the area where there is no original is extremely low, and the 00D processing will be described later.Next, after the 00D processing is completed, there is a After scanning and obtaining the same image as before, it is visualized using the specified digital camera 6 or 7, and then transferred to the manual feed cassette 24.
Upper cassette 25. Lower cassette 26 or deck 2
Paper feed roller 5 from the specified paper feed slot among the transfer paper in 7
0, 51 or 52, and the registration row 22
It is transported to the front of 8. The member 29 attached to the illumination lamp 14 (hereinafter referred to as a moving optical system) unit integrated with the first scan me)-13 is moved to the document leading edge position (
After the image is detected by the inspection mark centimeter 30, the registration roller 28 is driven at a predetermined time Tt dk,
The transfer paper is sent in the direction of the photosensitive drum 1 with accurate timing to the point where the leading edge of m4 and the leading edge of the transfer paper coincide. Thereafter, the transfer paper passes between the transfer charger 31 and the drum 1, so that the toner on the drum 1 is transferred to the transfer paper, and after the transfer is completed, the transfer paper is transferred to the drum 1 by the charger 321.
more separated. Thereafter, the surface of the photosensitive drum 1 is cleaned by the cleaner fl 1331, and unevenness in placement is evened out by the pre-exposure rung 21t, making it possible to use it repeatedly.

The transfer paper separated from the photoreceptor drum 1 is led to the fixing device 3 by the inlay unit 4, and after being fixed, it is transferred to the 7 wrappers 34 (thus, one paper path path is established so that it is conveyed to the duplex unit 35). IJ# is switched, and the transfer paper is transferred to the transport section (
B)? (0), switch parks, and is stored in the intermediate tray 8. When the exposure operation for the set number of sheets is completed, the original 10 on the original platen 12 is passed through RD k' (D),
(H) and (F) switch back and repeat the reversal, and then reset the document 10 on the document table 12 again so that the back side of the document 10 will be copied. The transferred transfer paper is transported through the conveyance path (
G) to the front of the registration roller 28, and the member 29 attached to the moving optical system unit is detected by the IX document edge/beam 1 (image edge) detection centimeter 30. Time Tt D & register stroke 28
The transfer paper is fed in the direction of the photosensitive drum 1 with accurate timing so that the leading edge of the transfer paper coincides with the leading edge of the transfer paper. When the transfer paper passes between the transfer charger 31 and the drum L, the toner acid on the drum L is transferred. More separated. The photosensitive drum 1 is cleaned by a cleaning device 33 and a pre-exposure lamp 21
This evens out the unevenness in the first position, making it possible to rotate repeatedly.

Further, the transfer paper separated from the photosensitive drum 1 is fixed on the fixing device 3 by the conveyor (A), and is then discharged by the flapper 3 through the paper discharge roller 8 to the sorter 39. Ru. The copying operation is completed by performing this operation for the set number of copies. Further, the document +410 on the document glass 12 is transferred to the document tray via the paper bus path (D).
It is discharged onto σ.

It is also possible to make double-sided copies from single-sided originals.

In this case, Ft, DF! The set originals 1O pass through the paper path path (H) and are set on the original glass 12, and the exposure operation for one set number of sheets is performed, and the n1 transfer paper is stored in the intermediate tray 8 as described above. 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 ejecting operation, the next original is fed and set on the original glass 12. Then, an exposure operation is performed on this document, and a copy is made on the other side of the transfer paper of the single-sided copying station stored in the intermediate tray 8, and the paper is discharged to the sorter 39. The original is discharged onto the original tray 40 via the 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 copy mode using the gear in the operation section ll described later, set the number of copies, and then select the developer to be used from among the multiple developers and start developing. After specifying the device, enter the copy start key. From this point, the original 10 set on the RDF 9 is transported to the exposure position on the original glass 12.Then, as in the double-sided copy mode, a toner layer is formed on the photosensitive drum 1, and this toner hoe is transferred. The transfer paper separated from the photoreceptor drum 1 is guided to the fixing device 31 by the conveying unit (A) and fixed thereon, and then multiplexed (both sides) by the hook bar 34.
The paper path route is switched and controlled so that the paper is fed to the unit. As a result, the transfer paper passes through the conveying section (B) 8 and is stored in the intermediate tray 8 by the switching device 41. This operation is repeated for the set number of copies, and then the copying operation is completed.

Next, after ejecting the original 12 on the document table 12 to the document tray via the bus (H) of the DF, take out the next document from R, DF9, and place the document on the document table 12 as described above. After setting, the transfer paper fed from the intermediate tray 8 through the paper feed port 237 is transported to the front of the registration row 228 by the transport yr (G) in order to perform double-sided copying on the same side of the transfer. The copying operation is performed in the same manner as in the case of back side copying in the mode. The transfer paper is separated from the photoreceptor drum 1 and transferred to the leveling device 3 by 22)A471)
After the paper is fixed, the flapper 34 moves the paper to the paper ejection roller 38.
and is discharged to a sorter. This operation is repeated for a predetermined number of sheets to complete the copying operation.O Further, the original on the original glass 12 is discharged to the original tray 40 via the paper path path (H).

Next, the page continuous shooting mode will be explained. After setting the original on the RDF 9, use the operating section 11, which will be described later, to press a key to perform continuous copying, and then set the number of copies. This embodiment has a mode in which the developing device to be used is specified among the developing devices, and a mode in which the color of one side and the color of the second side of continuous shooting are automatically predetermined. In the following explanation, the atomic A size is A3, the magnification is 1x, APS (automatic cassette selection) is selected, and the - side and the second developer are predetermined (the first side is black, the second side is black, the second side is This section explains the operation of the red side) mode. - As mentioned above, the paper is fed to the exposure position by the RDF 9, the document is scanned by the first scanning mirror and the illumination lamp 14, and the electrostatic After obtaining the image, it is visualized using a predetermined black developing device, and then attached to the upper and lower cassettes or decks.
The paper feed port in which the A4 size transfer paper is set is selected by the paper size sensor 42, 43, 44 group. For example, the upper cassette 25 has A3 size, the lower cassette 2
When A4 size transfer paper is set in 6 and B4 size transfer paper is set in the deck 27, the paper is fed by the paper feed roller from the paper feed port of the lower cassette 26 in which A4 size paper is pushed, and then transferred to the registration roller 28. After the image tip sensor 30 detects the member attached to the moving optical system unit, the registration row 28 is driven after a predetermined time Tl to ensure accurate timing. It is sent in the direction of the photosensitive drum l, and the leading edge of the la gap is aligned with the leading edge of the transfer paper. In the end, as described above, the image is transferred, passes through a conveyance system, undergoes a fixing process, is discharged, completes the copying, and then moves on to the second copying. The moving optical system is controlled to automatically return to the optical system reference position Itl 5 (home position) when the aZ scan of the first side is completed, and the second copy start is from the reference position 15. After the n'r member 29 attached to the moving optical system unit 45 is cleared by the image edge detection sensor 30, the eraser lamp is turned on for a predetermined time T (A4 size width). ,−
The second latent image is obtained by erasing the potential of the surface area and unnecessary areas, and the second latent image is determined in advance.
The paper is visualized by a red developing device (color developing device), which is fed by a paper feed roller from the paper feed port of the lower cassette 26 into which the 4-size paper is inserted, and is conveyed to the front of the registration roller 28, and then After a predetermined time Ts, the registration roller 28 is driven, and the transfer paper is sent in the direction of the photosensitive drum 1 with accurate timing, so that the leading edge of the transfer paper coincides with the leading edge of the transfer paper. As described above, the toner is discharged through a transfer process, a conveyance system, a fixing process, and the copying process is completed. Further, as mentioned above, combinations of double-sided central copying and multiple developing devices, combinations of double-sided copying and continuous copying mode, combinations of multiple copying and A-print developing devices, combinations of multiple copying and continuous copying mode, etc. will be described later. It is configured so that it can be specified using the operation panel. Another feature is process speed (
It also has a function to vary the process speed (period delay) of the photosensitive drum 1 when the irradiation light to the photosensitive drum 1 is insufficient, and when the 4-input function is selected in operation g11 described later. Automatically reduces the process speed by about 1 minute.

In addition, as another function, in order to erase any part 8 of the aSS on the photosensitive drum 1, after image exposure and before development, an eraser lamp in which a large number of light emitting elements are finely divided is arranged, and the light emitted from the light emitting part is The elements are controlled so that any AI# can be erased, and the above-mentioned multiple copies and colors of multiple existing objects are combined to perform image synthesis. It is functional.

In addition, in order to make the process speed variable as described above, in this embodiment, the drive source, which will be explained using FIG.
Using motor A4I4, speed control is controlled by PLL jM)iζ
Therefore, in the control method, PLI and 81f are inputted based on the signal from the starter 80, and the DC motor M
The output of the PLL 81 is fed back to the output of the PLL 81 by an amplifier 83 so that the reference signal and the feedback signal are cyclic.
The DO motor 4 is driven by the driver 84 via the oscillator 80, and when changing the speed 8, the output frequency of the oscillator 80 is controlled by the input signals A and B. The signal man B is connected to a speed command circuit (not shown).

FIG. 3 shows the timing chart of the entire Shinkai, and FIGS. 4 to 8 show the forward rotation 2wL control, GflD dimming and OOD measurement, scan 7. Rear rotation, ) 5 imming yard 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. The electric layer temperature is 1
After reaching 85"C, perform front rotation first position control, COD dimming, and rear rotation, and fix! After reaching 195°C,
There are 91 people on standby and the number of copy key receptions in town. After the copy key is turned on, after forward rotation and potential control, in preparation for the 00D measurement scan, the lens moves to a position where it does not collide with the second mirror when full scanning is performed. Next, CoDp original 00D measurement is performed to detect the size and original a concentration. Thereafter, the lens is moved according to the magnification or the specified magnification l according to the calculation by the human MS. It scans the set number of sheets, and after the last reversal, it starts rotating.

Figure 4 is a timing chart for pre-rotation, and pre-exposure and blank exposure are performed in synchronization with the main motor.

Post exposure is turned on, and from pre-exposure, 1st, post,
From the pre-exposure when the transfer 2-separation charging is turned on, the pre-rotation comes to an end with the do-no-mu transfer.

During the copy operation, the designated developing device is driven in synchronization with the main motor, and when it passes the potential sensor position from the pre-exposure, the current irrigation bias is around the 7th printer output range +
Enter the control of 200 yen. At this time, the other existing appliance is in a floating state.

Figure 5 is a timing chart for a certain gain, and when the control starts at 1 (the blank is turned off and the drum is turned off).
This forms a dark potential. The drum potential is measured by a sensor at m, and the primary imperial flow is varied so that the dark potential reaches 450 Vl, which is called VD control, and is performed four times. Next, the amount of light of the illumination rung is controlled in the primary flow obtained at Vv. Light the lamp and
Form a bright IJt position on the drum. The drum release position was measured using a sensor, and the dA command position tilt potential was 50V.
Control the light intensity of the illumination lamp so that it approaches . This is called VL1 control and is performed three times. Light again with the light weight obtained from vl-1! ! This position is called vl13. This is used to determine the developing bias Do.

After vLs measurement is completed, potential control is completed.

FIG. 6 is a timing chart of OODgll light and OOD measurement. In OOD dimming, the illumination rung is controlled so that the illumination lamp has a light intensity suitable for COD measurement.

The scanner is located at the front of the home position, exposes a standard white plate, measures the amount of reflected light by COD, controls the light t so that the maximum value on the - line is at a predetermined level lζ, and controls this After the process is completed, the optical system performs a full scan to detect the size and position of the document. At this time, when it is detected that there is no document, the level 9, 9 pump light amount is changed and the 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 current irrigation bias DO becomes vLs +yoy, and the current irrigation bias AC is also turned on. Roughly speaking, desired bluff 2 lighting control is performed from the tip of the image at a predetermined timing.

FIG. 8 is a timing chart of direction rotation.

After the final reversal of the scan, the rotation begins, and from the primary band 1,
Sequentially, developer, JAm bias DC, developing bias AC
But, OFF, -ky? +200V is turned OFF, and the post-charge transfer charge 2 separation voltage is also turned OFF. Primary charge O
From FF to drum 1 time@post-development bias Do becomes Ov. After the last paper has been ejected, the main motor is turned on, flash/reexposure, and post-exposure.

251 is a document mounting glass, and a touch panel using transparent electrodes is provided on the glass mounting surface.
By pressing the pressing pen 52 onto 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, it is transparent even when exposing the original to form an image!
Since a pole is used, it does not affect the aperture formed on the photoreceptor. Reference numeral 253 is a switch provided on the bench, and coordinate input can be executed only when the switch is pressed. 254 is the original placed along the X direction and the Y direction.
It is an LED array installed on the edge of the virtual glass 251,
It can be turned on and off at will based on instructions from the main CPU. Reference numeral 255 denotes an operation unit, which controls control input/output commands to the copying apparatus.

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

100a-e are funky keys, respectively;
Any settings can be made using each key on the operation panel.

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 a Coser uses every day, the unique magnification used by each Coser, or the designated discussion/concern area, etc., using one key. You can instantly set the desired copy mode by simply pressing . In this copying apparatus, the memory is always maintained by the backup power source l.

Numeral keys 101 to 110 have the function of setting the number of sheets as well as inputting various data in various asterisk modes in combination with the asterisk key.0111 is a clear key for clearing the set number of sheets or data. , 112 is a reset key for returning the set mode to a predetermined standard mode, and returns 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 selects a plurality of developing devices built into the main device. It is a color key, and when the power 2-current filter is selected, the built-in LED 15Q lights up, including the meaning of a warning.

151 is the copy start key, and when it is ready for copying (excluding during copying), the edge is displayed, otherwise the red LED1
51 is lit and displayed. 119 is the person E key, and the manuscript M
An AN mode is selected in which it is possible to detect the degree and correct the phenomenon bias to obtain an appropriate copy of m degree. In addition,
When the AE mode is selected, the public indicator 152 lights up.

118°120 are manual density adjustment keys, f
Increase the ill level by using keys 118 and 120.
You can get the desired concentration by diaking. In addition, key 1
If you press 18, the concentration will be high <(@<), and press key 120.
If you press , the m degree will become lower (lighter), and the level will become darker on the display 153 accordingly.

Reference numeral 154 is a 7-segment (4) indicator that displays the number of copies.

Reference numeral 121 is a cassette selection key, which is used when manually selecting a cassette stage. 3. Auto Paper 5select (APS)
It also has functions. Reference numeral 155 is a display group indicating the stage selected by the cassette selection key 121 or the APS mode.

122 is a selection key for single-leg enlargement magnification, 123 is a fixed reduction magnification selection Φ-, and 124 is a variable magnification selection key (Auto
Maguni eyes cation 5 select: AMS
) key, which has the function of automatically selecting an appropriate magnification based on the detected original type and the selected cassette size. Note that if the AMS mode is selected, the display 158
lights up. 125 is the zoom key, the ten key and -
It is possible to increase the magnification in 1% increments by using the keys. 126 is the same size key, which sets the copy magnification to the same size (
100%). In addition, when in the 1x mode, the display will display the set copy magnification, selected cassette size, copy mode, etc., and will not be used in the event of an abnormality in the device, temporary user operation, or inconvenient operation procedures, etc. message of
It also functions as a display.

127 is a single-sided original 2 using the intermediate tray in the main device.
128 is a copy selection key that automatically copies two sheets of paper onto the same side of one sheet of paper (single-sided → double-sided), and 128 is a copy selection key that automatically copies two sheets of paper from a double-sided original using 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 Dl' [duplex → double-sided]
130 is a copy selection key, and 130 is a copy selection key that uses an intermediate tray or
This is a multiple copy selection key that allows multiple copies to be made by overlapping two or more images onto a sheet of paper.

Note that when any one of the keys 127 to 130 is pressed, one of the indicators 159 to 162 correspondingly lights up.

131 is a page continuous shooting selection key, which allows you to select F with a single operation.
It is possible to make two copies (referred to as A copy and B copy) by exposing and scanning the original on the A table into two parts, left and right.
Select the mode you want to use.

Reference numeral 132 is a page continuous copy multiple copy selection key, which has a rudder for multiple copying A copy and B copy in the above-mentioned page continuous copy mode onto the same sheet of paper.

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

Reference numeral 134 denotes a frame eraser key 11 for erasing the shadows that appear in the book's edges or in the center of the book when the page is in the page continuous copying mode.

Reference numeral 135 is an image shift key, which allows the image to be shifted in either direction. Also, while pressing this key, press the Te/key to change the shift amount.
JJ4 can be adjusted. Also, this shift) Mayuzumi'b, 10
It can be memorized by 0 a-e's 7 a/kuku adventure.

Reference numeral 136 is an area designation key, which also serves as an S deletion key for the area designation area. In addition, for area specification, there are two modes to choose from: original #4 priority (the size of the specified area is variable according to the magnification) and cassette loss (the size of the specified area is constant regardless of the magnification). This is an X/Y medium- key, and is a de-event input key for inputting performance designation by ten medium-l.

138 is in/out-? -, and is a selection key to select whether to display the inside of the specified letter 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 the internal or external removal of the area in 2nd area during multiple copying (
This is an automatic switching key for the current color (in/out) and the current color, and when this mode is selected for multiple copies, the A and B copies will automatically switch in/out.
, the color can be switched.

141 is a color automatic switching key for page continuous copying;
1A (Automatically change IR color) when copying the person mentioned above and copying B.
When the key 141 is pressed, the display 170 lights up.

Each of the LEDs 157 to 171 is a selection mode display group indicating that each mode is selected. 172-174 are
This is a display section that shows the number of set areas, and in this copying apparatus t, up to three areas can be set. 175,17
Reference numeral 6 denotes a display section indicating internal/external draining, which lights up when the mode is set using the key 138. The set area values for the 177 LED groups are Xm1n, Xmax, Y
This is an indicator indicating either min or Ymax.

Reference numeral 142 is an area designation key by COD, and when this switch is pressed, the optical system starts scanning and performs only the function of recognizing the area drawn on the document.

143 and 144 are a sort key and a collate key, respectively. 178 and 179 are sorted respectively.

This is an indicator that indicates that it is collate mode.

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

0PU201 is a microcombi that controls each display unit≧
- control the display element, and display contents are based on instruction (communication) data from the main body OPU.

206 is a fluorescent display of 40 characters of 5 x 7 dots, which is 7 bits x 5 bytes to make up 01 characters.
e data is required, and according to the instruction from OP[J201, 35-bit data is sequentially read from the character gelator 203, and the data is transferred to the shift register.
Transfer to the shift register latch. Driver -2
After 5 bytes (ie, 35b1tO) data are latched at 04, the shift register latch driver 205 drives a digit signal that determines the timing to display one character, and the character rL15c is displayed. In this way, each character is dynamically lit, and the duty ratio is a little less than 1/40 (due to blanking time).

Father, 208 is the display part (7) Sono et al. (7) LED MAT
It is RJX and is driven by dynamic lighting.

In FIG. 12, there is a block section C around the input section of the OPU 301 that controls the main body.

The key matrix 302 is a group of switches provided on each person's key, and is dynamically operated using well-known technology.
P U 301 fcτ is processed and it is determined whether the OFF key has been pressed.

Reference numeral 304 denotes a guiditizer, which is configured so that the XtY coordinates of the location d pressed with the light pen are detected by the control circuit 3051.

306 is a seat input trigger signal switch provided with a bevel, and the trigger edge of this signal is synchronized with the main body CP [J301 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.

309.310 is an LED array arranged along the glass frame in the X and Y directions, and GIIPU301
It is controlled to turn on C dynamically.

Figure 14 shows this situation. If you now specify the outside of the shaded area in the figure, the x- and y-coordinates corresponding to the area to be formed will be displayed, and the -g-LED will light up. (LED beveled edge in the figure).

Conversely, if the same exclusion is specified, only the LEDs in the shaded area are turned off, and the other LEDs are turned on.

In addition, conversely, LFli of the part where the ridges are not formed in the specified area
It is no good even if you try to display l).

FIG. 15 shows a color detection circuit of the developing device. 2q each developer
I), the protrusion 311- provided in 31.1, 312
Color detection switch 313, 314 from 1゜312-1t
Close. 0PU301 is color detection switch ON 10F
The color of the currently set iron equipment is determined from the F-shaped diagonal. That is, each current 1. The J device has its own switch pattern for each color, and as shown in the figure, if three switches are used for one color, the color of 2''-1-74m; It has become.

Next (consider setting this area.

When the area designation key 136 in FIG.
: Genkoku Kigen 2: Cassette Kijun" is displayed, indicating which one is currently selected by Fluff Fugu 1. You can also change the mode by pressing @1m or @2" on the numeric keypad. This series of indications and operations is executed only while pressing 136 1,000-.

Here, we will explain the case where the document-based area specification mode is selected. In this mode, the X-axis r (sub-scanning direction) Y411 from the coordinate origin determined for the original.
If you specify an area (in the direction of the main running hill), the specified area will also be automatically scaled even if it is double scaled copy.

The numeric keypad and X/Y keys are Xm1n.

Xmax (g), Y (min) 4, Y (min) 0) im Specify the IC point to complete the designation of one area. Specifically, 'X/Y', Xm1n, 'X/Y', Xmax,'
'X/Y'.

Ymx n 1 @X/Y' * Yl
Manpower in the order of nax + "X/Y". Note that each coordinate is set in units of hom. After setting the values”
When the X/Y' key is input, the 177 LEDs light up in sequence, allowing the user to confirm that the coordinates of the valley point have been input. Also, when inputting each coordinate, the message display allows you to
:Xm1n (to) Zahi purchase...○○○III'' This is done in an interactive manner, so even a user using the device for the first time can easily set it up.

In this way, when you finish setting one area with 4 points, 17
The LED 2 lights up and 1 is displayed to indicate that one area has been set.Also, the outside extraction mode is automatically selected and the display 175 lights up. In/out here
With the key 1381, the inner cutting mode lζ can be changed.

In addition, the area designation can also be made using the touch panel lζ using a group of transparent electrode switches on the document table 251.

In this case, set the original on the document table with the original facing upward. However, the reference point at this time is in front of the left side of the document table, which is different from the reference point when actually copying (the back left side). In this state, the pressing ben 252 presses two diagonal points of a designated area (limited to a rectangle) on the document. At this time, the input switch 253 is pressed while being pressed with the pressing ben. Coordinate input through the input switch 253I is an edge trigger that occurs at the moment it is pressed or released, and when it is held down, the coordinates will not be input even if it is pressed with the suppressor.

Here, when specifying coordinates by Ben, press 1 and press 2 for X and Y.
Since the coordinates are specified at the same time, 172 I and ED cups will be lit at the same time. In addition, the input coordinates are numerically displayed on the message display section I at the same time as they are 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 on which a region is to be specified is placed on top of the four original seedlings, and a copy is made using a color developer (other than black male). On this copied sheet of paper, mark the desired area with a frame using a Magic Ben or the like. Here, the reason why we created one color representation was to create a difference in color from this Magic Ben.
It is preferable to set the degree of deviation (fAL#[, for this purpose) so that the desired area can be clearly identified.Next, place the marked original on the original table again and press the area detection key 142.
The optical system starts scanning and detects the OOD set on the optical layer.
ii. Recognize the marked area on the manuscript.

Here, it is assumed that only one area can be recognized in one scan. Also, since the recognized area will have its location and orientation recorded on the message display (I4i
can be approved.

It is possible to specify an area using the three input methods described above, numeric keypad, touch panel, and COD, and by freely combining these methods, it is possible to specify up to three areas.

Father, it is also the town nth to memorize the area using the fax key by 100a-e in the specified state.

Furthermore, the inputted area can be confirmed on the message display, as well as the
Y@ (Macroscopic confirmation can also be made with the LED array 4 installed along this line.

To confirm this, use the correction key 1391 to select and fill in the area 74, and press the correction key 139 once to T and first A.
: $,, Press it once again to select the second area] Or press it again to select the third area, and press it again to select the area. Press it once again to select the area. The value range is selected as A. By selecting one vote for each position of XY using the X/Y keys 137, you can sequentially call the message, the dice gray l, and the current tilt of the pig, and in this state, In addition, the set reconnaissance can also be corrected using the numeric keypad.Of course, the numbers input and set using the transparent digitizer (touch panel), 000, etc. can also be modified using the numeric keypad. Positive is 0T ability.

Further, by selecting an area using the 1 reference key 1 and pressing the C1 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, in the copying process, the eraser 1 erases the circle or outer side of the area to obtain a desired copy.

When the CPU recognizes the coordinates of the area, it changes the coordinates in the sub-scanning direction (X direction l0
I) On the other hand, the Xrn of the attack formed on the drum
In ~ X max By turning on (excluding V3) or extinguishing (excluding the outside) the LBD array in the corresponding range of Y min % Y max i of the formed region, the inside or outside of the area can be obtained.

groove! Figure J-2 is a diagram that depicts the original four robbers. Transparent'1
A command, 111320, is provided on the front side of the digitizer 304, which is formed by 1.
Similarly to the coordinate force in the case of a constant, the command ζ is selected by pressing T with the pen. In this 4th step, the coordinates pressed with the pen are continued, and if the read coordinates are the document placement area, it is determined to be an area specification or magnification specification, and if it is the command area, the command corresponding to the coordinates is selected. . 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 'vjL relative in black, and 324 is the specified This is a command that copies the outside of the area in color, and 325 is a command that clears the coordinates entered with Be/. In this way, the area and color can be specified using the digitizer.

Of course, the digitizer need not be provided on the glass of the original device, but may be provided on the original cover, or may be separated from the main device.

This copying device is based on 0ODI 8. The AMS is equipped with a size detection means, a cassette size input means, and a zoom lens 16 for continuously variable magnification.

APS is realized.

When the copy key 117 is pressed, the optical system performs prescanning, inputs the original image 1a at this time, and detects the original size. A density difference is provided so that 00D can correctly detect the document size. Here, the erasing means prevents the toner from being deposited on the padded surface and causing a visible image to disappear. Also, since the 11th degree is darker than the original,
There are also cases where it is detected that there is no original manuscript. Therefore, once it is detected that there is no document, the lighting voltage 2 determination reference level etc. are changed and pre-scanning is performed again to detect the document size.

Furthermore, if the detected document setting position is more than a certain distance away from the reference point, a message display will warn that the document placement position is defective, and execution of the subsequent copy sequence will be stopped.

Similarly, when the COD 181 detects that the original is placed diagonally, a warning is issued and the system stops.

Incidentally, the slanted placement of the original is detected from the seat I at the corner of the original or the inclination of the edge of the original.

However, since the user may intentionally place it in such a way, the warning cancellation switch (not shown)
If the warning cancellation mode is selected, the copy sequence is executed even in the above-mentioned case. However, in this case, the X coordinate and X coordinate of the farthest point from the reference point can be determined to be the document size, and the human MS and APS can be executed.

Of course, an erase means is required for the portion determined to be outside the document.

Furthermore, if the Y-axis (optical system scan direction) is only at fA, automatic image shift is performed.
Sue? It is also possible to obtain an appropriate artist by adjusting the timing and the timing of paper conveyance.

In addition, even if there is a warning, you may be able to ignore the warning and copy by pressing the copy key again. If either one is specified, the other can be automatically calculated and determined. (A.M.
S, APS).

Here, if the paper size calculated from the document size and magnification becomes a standard size, it will not fit. Therefore, in this calculation,
The first condition is to set the minimum cassette size that includes this calculated paper size. Make the size slightly smaller (allow some leeway). Specifically, the appropriate magnification is determined by the original JlA size and the cassette size L, but in general, changing the magnification to the surface plate (such as borrowing) ), so if the detected document size matches or is almost equal to the fixed size, select the fixed 4f magnification between the fixed form and the surface plate in preference to the accurately calculated magnification. It is also possible to use a cassette size, but in addition to the remote size prepared by the manufacturer, the user or the corresponding 11
Therefore, special sizes are often used. In this copying apparatus, in order to perform AMS, 8P8@% even when dealing with these special sizes, the X and Y dimensions of these universal force sets 11 can also be registered. 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.

1 Universal 1: X (vertical) 2---Sword.

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

In this state, use the numeric keypad to set the dimensions in the X and Y directions to M1.
All you have to do is put in the effort in units.

It is also possible to set the paper size using the transparent Vt pole by setting the document on the document table 251, or to detect and register the paper size using the 30D scan. These detections are performed by the detection key 142.

Registration is valid only in asterisk (*) mode, unipartial cassette gold ball mode.

In this manner, APS and AMS of non-standard size, non-standard cassette size, and arbitrary printing rate are also executed. 'JL can be done.

On the other hand, this copying apparatus having an area designation function can execute AMS or APS based on the size of the designated area, cassette size, or magnification, rather than the original size.

Next, I will explain how to set the magnification.

In this copying machine, fixed magnification selection keys 122 and 123 are used.
, arbitrary magnification (zoom) selection key 125. In addition to setting the magnification using the automatic magnification selection key 124 or the like, the magnification can also be set using a transparent digitizer on the document table. In this case as well, the magnification can be certified 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. If you specify a point farther than the first press with the second press, you can enlarge it, and if you specify a point closer to it, you can get a reduced painter. This instruction will also be displayed on the message.

@1 push: 2 push -rats:
"an-+%" It is also possible to use the numeric keypad to determine the magnification by substituting binary values in the same way. By using these 20,000 methods for determining the magnification, it is possible to accurately determine the magnification that the copying machine is capable of. In some cases, the magnification may exceed the variable magnification.In this system, it is possible to reach the desired magnification fc by repeating 8 copies up to a maximum of 21, so if the first copy is not possible, the second copy is made at the same time. The configuration is such that the copy magnification can be specified as follows.

10004Ist: ○QO%, 2nd: ○QQ%' After making the first copy, place the scaled image II on the platen, input the displayed magnification, and make a copy again to obtain the desired magnification. You can get a copy.

Therefore, in this equipment which has a copy magnification of 50 to 150%, it is possible to specify a copy magnification of 25 to 225%.

At this point, after the first copy, you can automatically set the second magnification.

In addition, it is also possible to produce Enoki Shabei 4 by combining the digitizer's power and UaDi Koyoruhara 44's power. Immediately, specify the size corresponding to the size you want to enlarge or reduce with the titizer using the pen, set the original, detect the original size during prescanning, and copy from the ratio of the two sizes. All you have to do is decide on the magnification.

FIG. 16 is a flowchart for determining the magnification of an object using a digitizer or numeric keypad. First, 41
For example, enter the coordinates corresponding to the size of the document using the 2-key or numeric keypad.
For example, the coordinates corresponding to Enoki's length in the image are manually entered (Step 2). In addition, when inputting the coordinates, specify the point on the original Tachibana four glass that corresponds to the origin and the diagonal I. Also, the four keys input using the numeric keypad only need to be the X or Y coordinate. Then, the subject magnification is calculated from the input Zano 2/Zaori IQx (step 3). Step 4) to determine whether the calculated subject magnification is within the variable magnification range of the device.
If it is within the range, indicate the magnification □ to the public (Step 8). If it is outside the range, find the square root of the calculated magnification to check whether it can be copied twice (step 5), and use that value to check whether it is within the range of 6J sets of magnification (step 6). ), if it is within the range, display the first and second subject magnifications using the obtained square root value as the subject magnification (Step 9); if it is outside the range, display a warning to that effect (Step 9). 10).

In addition, the first and second subject magnifications do not need to be calculated by taking the square root; instead, the possible magnification for one subject is taken as the 1st subject magnification, and the first calculated uneven subject magnification is calculated. The value obtained by dividing the obtained magnification of the first photograph may be set as the magnification of the first photograph of 21g.

Next, control of object operations centering on functions such as continuous page copying, multiple copying, area designation, etc. will be explained using the flowcharts shown in FIGS. 16-2 and 16-3. In step 11, it is determined whether the copy start key is turned on, and if it is turned on, the copy routine is executed (
Step 12).

The details of the copy routine shown in FIG. 16-3 will now be explained. First, determine the subject matter rate and photographic angle, and adjust the lens position, bias, etc. (step 30.31)
. Then, select color, i.e., power 2 - determine whether or not the copy mode is set (step 32), if it is not color mode, select the black developer (step 33), and if it is color mode, power 2). - Select the developing device (step 34) and judge whether there is an area specification (step 35), and if there is an area specification, check whether it is based on the cassette when changing the magnification @step 36) ), if n is not the cassette reference, the original reference is used, and the area itself also changes magnification according to the magnification, so the area determined by multiplying the set area by the subject magnification determined in step 30 is set as the set area ( Step 37). Therefore, if you want to remove the inside of an area or treat it as an outside, all you need to do is turn on the blank LHD corresponding to this new area. Step 38) to determine whether the outside is blanked out, and if it is in the in mode, control the blank exposure lamp to erase the outside of the area (step 39).
In ut mode, a flag is set to erase the inside of y)TL (step 40). Further, if there is no area specification, the above control will not be performed. Then, in step 41), it is determined whether the page continuous copying mode is selected, and if it is page continuous copying, scan If) is determined by copying the A copy (copying the left half of the M document placed on the document table). Step 42) If it is an A copy, set the flag to perform A scan (scanning the left half of the original document placed eccentrically).Step 43)
, if it is not an A copy, then a B scan (scan the right hand side of the original)
Set a flag to perform (step 44
). If it is not continuous page copying, scanning is performed according to the size of the document. Exposure and phenomenon according to the conditions determined by the above judgment.

Copying processes such as transfer and copying are executed (the copied item E is strained and tied onto the intermediate tray) (step +2-2). 6 items], there is a gap (if so, 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 upper paper ejection tray (step 14), and if it is multiple copying, the paper is copied. Store it face down in the intermediate tray (Step 15)
. And whether or not it is in the mode of automatic color and area conversion, that is, automatic conversion of inner and outer areas in the first and second copy.

During the automatic color conversion, it is determined whether or not -140 or 141 is pressed (step 16), and if the automatic conversion mode is selected, the color and area are converted into inner and outer edges (step 17). Then, it is determined whether or not the page continuous copying mode is activated (Step 18).
Step 20), if the page continuous shooting mode is selected, the copy routine is executed again (Step 21).

Figure 16-4 shows an example of specifying an area and making a variable size copy with the outside treated as t.(a) shows the original being overstretched, with the dotted line 350
indicates the specified area. +b when changing the size based on the original
), the area is also scaled and one image fits within the scaled area without being missing.

However, when copying is performed with variable magnification based on a cassette, as shown in (C), the area is not magnified, but only both images are magnified, so there are cases where part of the stroke is missing.

Next, color conversion in double-sided copying in page continuous copying mode will be explained.

A mode is set in which two originals (A4 size or smaller) are quickly copied on the left and right side, with different colors on both sides. When the copy start key 151 is pressed in this mode, only the original placed on the left side is set, 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 is turned on 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 is sent toward the drum at the timing when the leading edge of the latent image on the second document coincides with the leading edge of the recording paper. The timing may be faster or slower.

The document on the right side is then copied onto the back side of the recording paper and ejected from the machine. In this way, recording sheets with different colors on the front and back sides are stored in the intermediate tray with the copied side facing down, so that multiple copies can be obtained by making the originals on the left and right sides different in color.

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

FIG. 17 is a circuit block diagram of this embodiment.

(400) Id control microcomputer, (1
8) is a CCD image sensor, (401) is an A/D converter, and (402) is a COD drive pulse generation circuit.

(403) Start signal from Fi external circuit, (40
4) also receives a document/area mode switching signal from an external circuit, (405) u optical system home position sensor (
home position signal from (tS), (406)
The image tip signal from the image tip sensor (30) is used (407).
) is the shift pulse signal of the CCD image sensor (18), (408) is the reference clock signal φ, (409)
The transfer lock signal φT1 (410) of the FiCCD image sensor (18) is also the transfer lock signal φ2) (
411) u Similarly, with reset pulse R8, (4x2
) is the output signal COD of the CCD image sensor (18)
OUT.

('413) is the clock signal A/DCLK1 (414) of the A/D converter (401) is the digital signal DAT after OA/D conversion, which is the output of the CCD image sensor (18).
It is A. (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 to the lamp (14) that corresponds proportionally to the value of the dimming data (417).

To briefly explain the operation, first, a start signal ("403") is sent to the microcomputer (400) from the outside.
When this is given, a program for document detection and area recognition, which will be described later, starts running. First, the microcomputer (400) uses a built-in timer function to output a reference clock signal φ (40B) and a Φ converter clock signal A/D CLK (413). From the reference clock signal φ (408), the clock signal φ1 (402) is transferred to the CCDK dynamic pulse generation circuit 1'402) and locked by the VC.
09) and φ2 (410), and a reset pulse RS r411) is generated. Then, the output signal CCD0UT (4x2) ti of the CCD image sensor (18) driven by these clock pulses,
A/D w nha-fi (401) K yoF)
, A/D exchanged, and its digital output D A T
A (414) n Microcomputer (400)
is read from the input boat of Original/area mode switching signal (404), home position signal (4o5),
The image tip signal (406) will be described later in the explanation of chart 70.

Also, when a request for dimming for the CCD image sensor (18) occurs, the dimming circuit (415) turns on the lamp (14) in response to a lamp on/off signal (416).

While checking the A/D conversion value DATA (414) of the output signal of the microcomputer CCD image sensor (18), change the dimming data CVRDATA (4x7) and adjust the lamp to an appropriate brightness. (14) is dimmed, and the value of dimming data (417) at that time is stored.

Further, when performing AE, the lighting voltage of the lamp (14) is controlled by changing the value of AE data and light control data (417), which will be described later, to obtain appropriate exposure.

FIG. 18 shows shift pulse sh, (420), transfer lock φ1 (421), φ2 (422), reset pulse R31 and CCD output signal CCD.
0UT (424), A/D converter clock ADC
LK (4zs), A/D converter output DAT
A timing diagram showing the phase relationship between interrupt timing (426) and interrupt timing (427). The interrupt program will be described later.

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

FIG. 20 is a simple IjK diagram of the document detection method.

(430) is the shift pulse i of the CCD image sensor sh (407), (431) Id CCD
(Macy sensor output signal CCD OUT (412
), (432) /d Slnotshu 1 Novel, (91
) is the standard white board, (15) is the optical system home position.
The output of the sensor, (30) Id image sensor, (12) u document table, (435) Fi original, (436) FiCCD image sensor is sent to the microcomputer (40).
0) is the position to be processed.

As shown in the figure, not all the output data of the CCD image sensor is processed in each line, but the microcomputer (400) processes it at regular intervals.
This is because the processing speed is slow, and it is not enough to process all the data in time. Shifting the processing position for each line is a means to prevent detection accuracy from deteriorating as much as possible.

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

(441) is the original manuscript, (442) is a dummy copy made from the original manuscript, (443)
Markings on the Fi dummy copy (444
), (446) is the desired copy.

To explain the plains, first, an original document (441) is set on the document table, and a copying operation is performed in the dummy copy mode to obtain a dummy copy (442) with a thin background using colored toner such as red. For this dummy copy (442), mark the desired area with a black marker as shown in (443). Next, mark the dummy
Place the copy on the document table and move to area V! Job Mode Scans the optical system and detects the marked area. Next, place the original document (441) on the document table once again, specify the inside and outside of the area, and copy.
'444).

You can get a copy like (445).

(446) indicates the name of each part when a marked document is processed by a document detection and area recognition program to be described later. 451-456 #i each 1st-
There are 6 stages.

FIG. 22 is the main 70- of the Fi document detection and area recognition program. The entire control program is designed so that this program is executed when the need for document detection or area recognition occurs during the flow of the copying sequence. To explain this flowchart according to the figure, first, when the above-mentioned necessity arises, a program according to this flowchart is executed from (1). In step (2), first, various counters (clock counter, line counter), etc. on the RAM are initialized. Next ■
In order to generate various pulses to drive the CCD image sensor, the reference clock φ (408) and the A/D
Converter clock pulse A/D CLK (41
3) Output . In this embodiment, both of the two clock pulses are oscillated by a timer function (with an interrupt function) built into the microcomputer (400). Next, at ■, wait for the optical system' home position signal (405), and if the signal is detected, proceed to ■, and this time, the image tip signal (405) is detected.
Wait for "406). When the image tip signal (406) is detected, press the ■ button to enable interrupts. Then, wait until the detection end flag is set at ■. Once set, proceed to ■. The program is extracted 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.

When the interrupt is executed, the process enters the main flow (2), and in (2) the clock counter that counts the number of output data outputted in time series from the CCD image sensor for each column is counted up. And in ■, shift pulse (407)? : Determine whether the typing is a specific output based on the value of the clock counter, and if so, jump to the sh screen as shown at @. If it's different, @
The flag is used to determine whether the program currently being executed has multiple interrupts. If there are multiple interrupts, jump to ■ to extract them from the interrupt program; otherwise, go to @ and determine the data read position by comparing the value of the sandal point and the value of the clock counter. If it is different, jump to ■ to extract from the interrupt program, and if it is at the reading position, go to ■ and read the document/area signal (40
4), the mode is determined. If the area detection mode is selected, the routine jumps to the area detection mode routine as shown in 'tDK. If it is in document detection mode, go to [Phase] and compare the A/D conversion value of the COD image sensor output with the certified threshold value to determine the current line counter and clock counter values. It is determined whether there is a document at the position indicated on the document table (12). If there is no manuscript, jump to [phase], if there is a manuscript, jump to [phase]
Proceed to. In [phase], the value of the clock counter is
Store it in the buffer as maxl. This value is updated each time there is a document in one line, and finally, the value of the clock counter at the time of the last data judged to be a document in that line. are all stored for each line. Next, at 0, the maximum value of the clock counter value, the minimum value Xmax, Xm1n, and the maximum value of the line counter value at the time of data determined to have a document for all lines processed so far. , minimum values, Ymax, Ymin and the current values of the clock counter and line counter, and update if necessary.

Next, in [phase], CCD image sensor output OA/
Store the D conversion value in a buffer for one line and one page.

In [phase], it is judged 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 [stock], and then the interrupt plug is sent through @. I'll leave it out. In case it is finished, in [phase], among the converted values of the output of the CCD image sensor for one line, select the data from the first data that is marked as having a manuscript to the last data that is marked as having a manuscript. A corresponding to its maximum and minimum values from
Count up the E data counter.

However, if an area for Ag data collection is set, the AI data counter will count and
Do an up.

This counter is prepared for all possible values, including the maximum value and the minimum value, and serves as data for performing AI.

Next, in [phase]) (the value of max 1 is stored in a RAM specific to this line, rather than being updated in the next line processing. Then, ① also skips the interrupt program.

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 ■ in FIG. 23, the process jumps to [phase] in this figure as shown in ■. [Phase] is determined based on the first stage corner 5 and 7 lags in Figure 21, and if it is the first stage, 5 as shown in [Phase].
Jump to EQ1 routine. Similarly, in ■[with] and @[phase], the 2nd degree and the 3rd degree in FIG. 21, respectively. 4th. Determine whether it is the 5th stage based on the flag, and if YES, 5EQ2゜5EQ3 like [phase], [stock], @, @,
Jump to sEq+, 5EQ5 routine, and if NO, proceed to the next step.

@ determines whether data processing for one line has been completed or not based on the value of the clock counter, and if it has been completed, jumps to [Yes] and exits the interrupt program, and if it has not been completed, [Stock] After updating the sample points at , proceed to [Yes] to remove the interrupt program.

FIG. 25 is a part of the interrupt routine of the document detection and area recognition program. Figure 24 ■, ■.

■,■,■Yoshi, jump to ■[phase][phase][existence][existence] in this diagram.

Jumping to ■, the CCD image sensor output OA/D conversion value and the set threshold level value are compared in ■, and the document table (12 ) Determine whether there is a document at the position shown.

If not, jump to @ and jump to [phase] in Figure 24. If there is a manuscript, set the flag at @ to the 24th stage from @.
Jump to [phase] in the diagram.

When it jumps to [phase], the A/D conversion value of the CCD image sensor output is compared with the set threshold level value in [phase], and it is determined whether it is a black spot level. If not, jump from [phase] to [phase] in Figure 24, and if it is the level of black cotton, set the flag to the third stage at @, and jump from [phase] to [phase] in Figure 24.

[Phase] When K jumps, it is determined in the same way as in ■ whether there is a Vci document, and if there is not, it jumps to @, and! [Phase] in Figure 24
Jump to If the manuscript is valid, go to @ and Xm1n.

Compare and update the Xmax, Ymfn, and YmaxO values with the current values of the 2-in counter and clock counter.

Next, at ■, set the flag to the fourth stage, and from ■
Jump to [Phase] in Figure 24.

If OK jumps, judge whether it is the level of black waku in the same way in ■, and if not, go from @ to [phase] - \jump in Figure 24, and if it is black waku level, set the flag to the 5th stage in ■. From there, jump through [phase] to [phase] in Figure 24.

When it jumps to [stock], similarly determine whether there is a manuscript at /, and if there is no manuscript, jump to @ and jump to [phase] in Figure 24. If there is a manuscript, then Xm f n, Xma
x #Compare Ymin, Ymax with the current line counter and clock counter values and update. Then, at @, set the flag to the 6th stage, and then jump through [phase] to [phase] in Fig. 24.

FIG. 26 is a part of the interrupt routine of the document detection and area recognition program. Shift in ■ in Figure 23.
If it is determined that it is the timing to issue the pulse (407), the process jumps to ``■'' in the figure as shown in ``■''. Then, at (3), a shift pulse (407) is outputted at the timing shown in FIG. In [phase], the line counter is counted up, and then in ■, the last line to be processed is finished. Just in case, the value of the line counter is judged. If it is finished, advance to @ and shift. The output of the pulse (407) is fixed to high, interrupts are disabled in [phase], AE data is created in [phase], and the interrupt program is extracted using @. [phase]
If it is determined that the process has not finished, proceed to [phase], set the sample point and 1 line end value, initialize counters, etc. with ``■'', and exit from the @Yoshi interrupt program.

FIG. 27 is the main 70- of the document detection and area recognition program with page memory.

The document detection area gm in the flow of the copy sequence
The entire control program is designed so that this program is executed when the need arises. To explain this flowchart according to the figure, first, when the above-mentioned necessity arises, a program according to this flowchart is executed.

In step (2), first, various counters (clock counter, line counter), etc. on the RAM are initialized. Next, in (2), in order to generate various pulses to drive the CCD image sensor, the reference clock φ (40B
> , and the A/D converter clock pulse A/
D CL K (413) is output. In this embodiment, both of the two clock pulses are oscillated by a timer function (with an interrupt function) built into the microcomputer (400). Next, wait for the optical system home position signal (405) at ■, and if the signal is detected and 9, proceed to ■ and wait for the image tip signal (406). Image tip signal (405)
If detected, interrupts are enabled in step (3).

Then, wait until the detection completion flag is set at (3). If it is set, go to ■ and read the COD output data on the page memory in order, and then read the COD output data in the area A in ■.
If yes, count up the AE data counter corresponding to that data in area A in [phase], otherwise count up the AE data counter corresponding to that data in area B in [phase]. Count up the counter. Then, in (2), the process returns to (2) until the processing of all data is completed, and when the processing is completed, the process is extracted from (2) and the program ends.

FIG. 28 shows a part of the interrupt routine of the document detection and area recognition program, 70-, which is executed at the timing shown in FIG.

When the interrupt is executed, [phase] enters the main flow, and in [phase], the clock counter that counts the number of each column of output data output in time series from the CCD image sensor is counted. Up.

Then, it is determined whether it is the timing to output the shift pulse (407) based on the value of the clock counter, and if so, the program jumps to the ah screen as shown in (3). If it is different, it is determined in ① whether the program currently being executed is a multiple interrupt or not, based on the flag. If there are multiple interrupts, jump to ■ Interrupt programming skills? If not, proceed to [phase] and determine the data read position by comparing the sample point value and the clock counter value. If it is different, jump to [phase] and extract from the interrupt program, and if it is at the reading position, proceed to [phase] and use the original/area signal (404).
Make a mode judgment. If it is the area detection mode, jump to the area detection mode routine as shown in [phase]. If it is in document detection mode, proceed to ■ and replace the A/D conversion of the COD image sensor output.Compare the set threshold level values. It is determined whether there is a document at the position above (12).

If there is no manuscript, jump to , and if there is a manuscript, go to @. At @, the value of the clock counter is stored in the buffer as Xmaxl. This value is updated every time the original cloth is entered in one line, and finally, the value of the clock counter at the time of the data that was last determined to be the original cloth among the data in that line. are all stored for each line.

Next, in ■, all the lines processed so far, the maximum value of the clock counter value, the minimum value Xmax, Xm1n * and the maximum value of the line counter value at the time of data determined to be original cloth , minimum value, Ymax,
Compare Ymin with the current clock counter and line counter values, and update if necessary.

Next, the A/D conversion value of the CCD image sensor output is stored in a buffer for one line and one page. In [phase], it is judged 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 ■, and then the interrupt program is processed through [phase]. I'll leave it out. If it has been completed, the XmaxlO value, which is the last data of the A/D conversion values of the CCD image sensor output for one line in [phase], is updated in the next line processing. RA specific to this line to prevent
Store in M. Then, extract the interrupt program from the [stock].

FIG. 29 is a part of the interrupt routine of the document detection and area recognition program. In [phase] of FIG. 28, if the area detection mode is selected, the process jumps to [stock] in this figure as shown in [phase]. In ■, it is determined based on the flag whether it is the first stage in FIG. 21, and if it is the first stage, the 5EQ is
Jump to l routine. Similarly ■.

2nd and 3rd in Figure 21 for ■, ■, and ■, respectively.
．． 4th. Determine whether it is the 5th stage based on the flag and if YES, 5EQ2 like [phase], ■, ■, @,
Jump to 5EQ3, 5EQ4, 5EQ5 routine, N
If O, proceed to the next step.

In step (3), it is determined whether data processing for one line has been completed or not based on the value of the clock counter. If it has been completed, jump to [Stock] and exit the interrupt program; ] to update the sample points, then proceed to [Stock] to extract the interrupt program.

Figure 30 F! It is part of the document detection and area recognition program's interrupt routine. Figure 29 [stock], O1@)
, @ , @ Yoshi, jump to cold J, [stock], @, ■ in this picture.

Jumping to [phase], there is a CCD image in [phase].

The sensor output A/D conversion replacement position compares the set threshold level values and determines the position t on the document table (12) O indicated by the current line counter and clock counter values.
Determine whether there is an ItK manuscript.

This is because it jumps to @, and jumps to [Yes]-\ in Figure 29. If the original is cloth, set the flag at @ to the second stage and jump from [phase] to @ in Figure 29.

When the process jumps to [phase], the A/D conversion of the CCD image sensor output is compared with the set threshold level value in step (2) to determine whether it is the level of black spots. If not, jump from ■ to [Yes] in Figure 29, and if the level is black, set the flag to the 3rd stage in ■, and move from @ to 2nd stage.
Jump to ■ in Figure 9.

When it jumps to (2), it is similarly determined in (2) whether the original is cloth, and if it is not, the process jumps to (2) and then jumps to [Yes] in Fig. 29.

If it is a manuscript cloth, go to [Co.] and go to Xm1n.

Compare and update the values of Xrnax, Ymin, and Ymax with the current values of the line counter and clock counter.

Next, set the flag to the 4th stage in [stock] and jump from [phase] to @ in Figure 29.

When it jumps to [Stock], it is judged whether it is a dark spot level in [Stock] in the same way, and if not, it is changed from @ to [Yes] in Figure 29.
If the level is black, set the flag to stage 5 at ■, then jump through [phase] to [Yes] in Figure 29.

When it jumps to ・, similarly at @, it is determined whether the manuscript is cloth or not, and if it is not, it jumps to e and then to ■ in Figure 29. If there is a manuscript, Xm1n, Xmax in e.

Ymin, Ymax all current line counters,
Compare with clock counter value and update. And■
After setting the flag to the 6th stage, jump through [Stocks] to [Yes] in Figure 29.

Figure 31 shows document detection and area &! ! ! It is part of the interrupt routine of the program. If it is determined that it is the timing to issue the shift pulse (407) in [phase] in FIG. 28, the process jumps to [phase] in the figure as shown in ■. Then, at (3), a shift pulse (407) is outputted at the timing shown in FIG.・Count up the line counter at ・, then [
Determine from the value of the line counter whether the last line to be processed has been completed in phase], and if it has been completed, proceed to @ and output the shift pulse (407).
Fixed, interrupt disabled at @, and A at @
Create the E data and extract the interrupt program. If you judge that it is not finished at [phase], proceed to [Yes] and set the sample point and 1 line.
Set the end value, initialize counters, etc. using [phase], and exit from the interrupt program using [phase].

! FIG. 32 is a flowchart of the dimming program.

When a sequence requires dimming for the CCD image sensor, the program contained in this flowchart is executed. After entering from ■, the lamp is first turned on by the lamp on/off signal at ■. The dimming data at this time takes the set value.

Next, in ■, the reference clock φ (408), A/D
A converter clock, A/DCLK (413), and shift pulse sh (407) are output to drive the CCD image sensor. Next, in ■, the A/D conversion replacement position ATA (414
) to determine if an overflow has occurred. If overflow has occurred, proceed to ■ and display the dimming data (41
7) is counted down by 1, and returns to ①, and this loop continues until there are no more over 70-. If overflow is no longer observed in step (2), proceed to step (2) and count up the dimming data. Next ■
Check for overflow at , and return to step 3 until overflow occurs. When an overflow occurs, proceed to step 2 to store the dimming data, and end the dimming program at step .

〔effect〕

As explained above, according to the present invention, by automatically replacing the developing device every time a plurality of originals are scanned on the document table and making double-sided copies, it is possible to make double-sided copies with different colors on the front and back sides in a single operation. It's easy to do.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the configuration of an embodiment of a copying machine to which the present invention is applied, FIG. 2 is a block diagram of a circuit that determines process speed, FIG. 3 is a timing chart of the entire device, and FIG. Rotation timing chart, Figure 5 is potential control timing chart, Figure 6 is CCD dimming, CCD measurement timing chart, Figure 7 is scan timing chart, Figure 8 is post-rotation timing chart, Figure 9 is Fig. 1 is a perspective view showing an embodiment of a copying machine to which the present invention is applied, Fig. 9-2 is an oval view of the document storage table, Fig. 10 is a top view of the operating unit, and Fig. 11 is A block diagram showing the configuration of the display section, FIG. 12 is a block diagram of the input section, FIG. 13 is a block diagram of the LED array drive circuit, and FIG. 14 is the L
FIG. 15 is a diagram showing the lighting of the ED array, FIG. 15 is a developing device diagram, a circuit block diagram of an embodiment of the present invention, FIG. 18 is a timing chart diagram of control pulses, and FIG. 19 is a CVRD diagram.
A diagram showing the relationship between ATA and lamp lighting voltage, Figure 20 is a diagram to explain the document detection method, Figure 21 is a diagram to explain area designation by marking, and Figures 22 to 3.
Figure 1 is a sequence flowchart for document detection and area recognition, and Figure 32 is a sequence flowchart for light control. is a COD for document detection. E3 jz7322 'jlj' JZh j15-ot
302 Nu O6 rod! 4 Ward 0/TIMINer'
427 No. 27 (D

Claims (2)

[Claims] (1) a plurality of developing means; a scanning means for independently exposing and scanning a plurality of originals placed on a document table; an exchanging means for automatically exchanging the developing device for each scan; The images obtained in the first and second scans are
1. A copying apparatus comprising means for copying on both sides of a sheet of recording paper. (2) A copying apparatus according to claim 1, characterized in that it has an area specifying means for specifying an arbitrary area of a document, and copies inside or outside of said area.