JPH0830151A - Image forming device - Google Patents

Abstract

PURPOSE:To improve the operability at the time of copying by making the copy area visible in displaying the image of an editing object overlapped with the area actually copied on the display part of the editor, and allowing to confirm the original transport state at the time of normal copying. CONSTITUTION:The image forming device is provided with the copying mode setting means for setting the copying mode such as the recording paper size and the copying magnification, and the original reading means for reading the original image in the host PPC 112, and then provided with the editor 100 for calculating the effective image area on which the original is copied basing on the copying conditions set by the copying mode setting means and displaying the effective image area and displaying the original image read by the original reading means overlapping the effective image area at the same time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a digital copying machine equipped with an editor (image area designating device), and more specifically, image forming for displaying a copy area and an original image on the editor. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus equipped with an editing function, manipulating an area of an original or setting a mode for each area is complicated and requires a considerable amount of setting time, and miscopying frequently occurs due to a setting error. Was. As reference technical documents related to this type, for example, JP-A-2-116260, JP-A-2-116261, and JP-A-2-116.
An "editing / copying device" disclosed in Japanese Patent No. 262 is known. This is because in an editor of a method of placing an original on a tablet and designating an editing area, a means for detecting whether the original position is appropriate is provided in the editor, and the area designation due to the displacement of the original is not performed correctly. To prevent.

[0003]

However, in the conventional copying and editing apparatus as described above, it is possible to prevent the occurrence of the area designation error due to the displacement of the document, but the actual copying is performed. Since it is not possible to confirm the area, it is necessary to perform work by trial and error while looking at the copy result, and there was much waste such as miscopying. In particular,
When the copy magnification is changed, there is a problem in that a mistaken copy may occur, such as a designated area protruding from the recording paper.

The present invention has been made in view of the above, and the original image and the area to be actually copied are overlapped and displayed on the display section of the editor to make the copy area visible and the normal copy When the document is being conveyed,
The purpose is to improve workability during copying.

[0005]

In order to achieve the above object, in the image forming apparatus according to the first aspect, a copy mode setting means for setting copy conditions such as a recording paper size and a copy magnification. In an image forming apparatus having a document reading unit for reading a document image, an effective image region of the document to be copied is calculated from the copy condition set by the copy mode setting unit, and the effective image region is displayed. Area display means for displaying the original image read by the original reading means in an overlapping manner with the effective image area is provided.

In the image forming apparatus according to the second aspect of the present invention, the area display means is based on the recording paper size and the copy magnification set by the copy mode setting means.
The lengths in the main scanning direction and the sub-scanning direction are obtained, and the effective image area is displayed in a quadrangle area formed by a diagonal of the lengths of the main scanning direction and the sub-scanning direction.

Further, in the image forming apparatus according to the third aspect, the area display means performs the main scanning based on the recording paper size, the copy magnification and the binding margin amount set by the copy mode setting means. Direction and sub-scanning direction length,
The effective image area is displayed by a quadrangle area formed by a diagonal of a length obtained by subtracting the binding margin amount from the main scanning direction and the sub scanning direction.

[0008]

The image forming apparatus according to the present invention (claim 1) calculates the effective image area to be copied of the original from the copy conditions such as the recording paper size and the copy magnification set by the copy mode setting means, and the effective image area is calculated. By displaying the image area and displaying the original image read by the original reading means in an overlapping manner with the effective image area, the copy range and the placement state of the original with respect to the original to be copied and the recording paper size are copied. Make it visible.

In the image forming apparatus according to the present invention (claim 2), the area display means determines the main scanning direction and the sub-scanning direction based on the recording paper size and the copy magnification set by the copy mode setting means. The effective image area is displayed in a quadrangle area formed by the diagonal of the main scanning direction and the sub-scanning direction, and the effective image area considering the recording paper size and the copy magnification is displayed to the operator. Make it visible.

Further, in the image forming apparatus according to the present invention (claim 3), the area display means determines the main scanning direction based on the recording paper size, the copy magnification and the binding margin amount set by the copy mode setting means. And the length in the sub-scanning direction is obtained, the effective image area is displayed in a rectangular area formed by a diagonal of the length obtained by subtracting the binding margin from the main-scanning direction and the sub-scanning direction, and the recording paper size and The operator visually recognizes the effective image area in consideration of the copy magnification and the binding margin.

[0011]

Embodiments of the image forming apparatus according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing the structure of an editor according to the present invention. In the figure, 1
Reference numeral 00 is an editor, which is mainly composed of the following elements. That is, 101 is VRAM and 102 is LCD
A controller, 103 is an LCD panel for displaying an original image and an effective image area, 104 is a ROM, and 105 is an SR.
AM, 106 is a CPU (+ DMAC) that executes control processing and arithmetic processing of the editor 100 as a whole, 107 is a DRAM for storing image data, 108 is a FIFO line buffer, 109 is a keyboard, 110 is a serial level conversion unit, 111 is an image This is a data level conversion unit. Also, 1
Reference numeral 12 is a host PPC.

FIG. 2 is an explanatory diagram showing the external configuration of the editor 100 shown in FIG. 1, in which 201 is a start key for starting the image reading process, and 202 is a screen for designating the display magnification. Magnification designation key, 204 is a cursor movement key, 205 is a coordinate input key, 206 is an area confirmation key for confirming (end, close) a designated area,
Reference numeral 207 is a clear key for canceling the input, and 208 is an all clear key for canceling all the image data and the editing data. Also, 209 is a scale display, 210
Is the cursor.

Next, the operation of the editor constructed as shown in FIGS. 1 and 2 will be described. First, when the start key 201 is pressed, the editor 100 issues a read start request through the command line to the host PPC 11
Output to 2. The host PPC 112 receives the signal of the reading start request and starts the document reading operation by the scanner unit 305 (see FIG. 3). At this time, the gate array 621 for signal switching (see FIGS. 6 and 7) is used by the editor 100.
The read image data is sent to the editor 100 from the scanner control circuit 623 (see FIGS. 6 and 7) through the data line.

On the editor 100 side, the sent image data is stored in the DRAM 107 for storing the image data via the FIFO line buffer 108. Data transfer is performed using the DMAC built in the CPU 106.
The determination of the start and end of the image data is made based on the FGATE signal sent from the scanner control circuit 623 (see FIG. 7) via the data line.

The image data stored in the DRAM 107 is transferred to the VRAM 101 and displayed on the LCD panel 103 through the LCD controller 102. The transfer from the DRAM 107 to the VRAM 101 is also executed by the DMAC of the CPU 106, and by enlarging / reducing display or partial display by transferring an arbitrary part of the image data.

Next, the area designation processing using the editor 100 will be described. LCD panel 1
A cursor 210 is displayed on 03, and by moving the cursor moving key 204 and pressing the coordinate input key 205, an arbitrary position on the original can be designated. A scale display 209 is displayed on the upper and right sides of the read image. In addition, a grid (point group) is displayed in the image display area at a position corresponding to the memory of the scale display 209.

The grid can be switched between display and non-display by setting. Further, the display magnification of the image is 100%, 150%,
It can be switched to three levels of 300%. Further, the display of the magnification change is executed centering on the position where the cursor 210 is displayed on the screen before the magnification change, and in particular, it is possible to easily specify the display position when the magnification is increased.

A case of designating a polygonal area using the editor 100 will be described. First, each of the vertices of the area to be designated is designated using the cursor movement key 204 and the coordinate designation key 205. When the start point is first input, a + mark indicating the designated coordinate position is displayed on the LCD panel 103. If the second and subsequent points are specified, a line will be drawn between the + mark and the + mark at the previously specified point. Area is the area confirmation key 206
It is confirmed by pressing, and a line is also drawn between the start point and the end point. After that, the coordinate data of the designated area is sent to the host PPC 112 through the command line and used as edit data at the time of image formation.

FIG. 3 is an explanatory diagram showing the configuration of a digital copying machine suitable for applying the image forming apparatus according to the present invention. As shown in the figure, this digital copying machine includes a copying machine body 301, an automatic document feeder (ADF) 302, and
It comprises a sorter 3 and a double-sided reversing device (DPX) 304.

In FIG. 3, the detailed structure of the above unit will be described below. The copying machine body 301 includes a scanner unit 305, an optical writing unit 306, a photoconductor and an image forming unit 307 around the photoconductor, a developing unit 308, a paper feeding unit 309, and the like.

First, the structure of the scanner unit 305 will be described. Reference numeral 310 is a contact glass made of transparent glass on which an original (not shown) is placed, 311 is an exposure lamp using a fluorescent lamp or a halogen lamp for illuminating the original on the contact glass 310, and 312 is light from the exposure lamp 311. A reflection plate 313 that reflects the light toward the document side, a first reflection mirror 313 that refracts reflected light of the document and guides it to a second reflection mirror 314.
Reference numeral 14 denotes a second reflecting mirror that guides the reflected light from the first reflecting mirror 313 to the next third reflecting mirror 315, and 315 receives the reflected light from the second reflecting mirror 314 and a color filter 316.
A third mirror 316 for guiding the necessary color light, a color filter 316 for transmitting light of a required color, a reference numeral 317 for forming an image of the reflected light on the next CCD image pickup device 318, and a reference numeral 318 for photoelectrically converting the reflected light of the document A CCD image sensor 319 for converting into an electric signal, a predetermined image processing (shading correction,
This is an image processing board that performs MTF correction, binarization processing, multi-valued processing, gradation processing, scaling processing, image editing processing, etc.).

In the above, the exposure lamp 311,
The reflection plate 312 and the first reflection mirror 313 are a first scanner that is integrally configured and moves at a constant speed, and the second reflection mirror 314 and the third reflection mirror 315 are called a second scanner. It is configured to move following the first scanner at a speed of / 2.

The scanner unit 305 configured as described above
Optically scans a document set on the contact glass 310 by the first scanner and the second scanner,
The reflected light is reflected by the first reflecting mirror 312 to the third reflecting mirror 3
15 allows the light to pass through the color filter 316 and the imaging lens 3
An image is formed on the CCD image pickup device 318 at 17. The reflected light imaged on the CCD image pickup device 318 is converted into an electric signal having an analog value and further converted into a digital image signal by an A / D converter (not shown). Next, the image processing board 319
After a series of image processing is executed by, the digital image signal is output.

Next, the structure of the optical writing section 306 shown in FIGS. 3, 4 and 5 will be described. FIG. 4 shows the optical writing section 30.
6 is a plan view of FIG. 6, and FIG.
Is a side view. In FIG. 3, reference numeral 320 denotes a polygonal mirror provided on the side surface of the regular polyhedron, a polygon mirror that rotates at high speed to scan the laser beam, 321 a polygon motor that serves as a driving source for rotating the polygon mirror 320 at high speed, and 322 denotes An fθ lens 323 for converting and correcting a laser beam polarized at an equal angular pitch so that the surface of the photosensitive drum 307 is linearly scanned at an equal linear pitch.
Is a reflection mirror that guides the laser beam passing through the fθ lens 322 to the photoconductor drum 307, and 324 is dust-proof glass for preventing foreign matter from entering the optical writing unit 306.

In FIG. 4, 401 is a semiconductor laser which oscillates a laser beam having an emission wavelength of about 780 nm, and 4
Reference numeral 02 designates a collimator lens for collimating a laser beam emitted from the semiconductor laser 401 into a parallel light flux, 403 an aperture for shaping the laser beam into a predetermined size, 40
Reference numeral 4 is a first cylinder lens for compressing the laser beam passing through the aperture 403 in the sub-scanning direction, and 405 is a synchronous detection mirror for receiving the laser beam outside the image area passing through the fθ lens 322 and guiding it to the synchronous detection light input unit 406. Reference numerals 406 denote synchronization detection light input units that input the laser beam guided by the synchronization detection mirror 405 and guide the laser beam to a synchronization detector (not shown).

The operation of the optical writing section 306 constructed as above will be described. The semiconductor laser 401 oscillates a laser beam by modulating it according to an image signal output by being image-processed by the image processing board 319. The laser beam having a certain angle is converted into a parallel light beam by the collimator lens 402, is further beam-shaped by the aperture 403, is compressed in the sub-scanning direction by the first cylinder lens 404, and is irradiated onto the polygon mirror 320.

After that, the laser beam applied to the polygon mirror 320 which has already been rotated at a predetermined speed by the polygon motor 321 is conformally scanned as shown in FIG.
After being corrected by the fθ lens 322 so as to have an equal linear pitch on the photosensitive drum 307, the photosensitive drum 307 is exposed and irradiated by the reflection mirror 323. At this time, the synchronization detection mirror 405 receives the laser beam outside the image area, guides it to the synchronization detection light input unit 406, detects the writing start position in the main scanning direction, and writes in the main scanning direction based on this synchronization detection. Is done.

Next, each structure for forming an electrostatic latent image will be described centering on the photosensitive drum 307 of FIG. A photoconductor layer is formed on the surface of the photoconductor drum 307. For example, an organic photoconductor (OPC), α-Si, Se of the photoconductor layer having a sensitivity characteristic corresponding to the emission wavelength of 780 nm of the semiconductor laser 401. Among -Te and the like, an organic photoconductor (OPC) is adopted in this embodiment. Also,
The image forming process of this embodiment employs a negative / positive (N / P) process in which light is applied to the image portion. In FIG.
325 uniformly corona discharges the surface of the photosensitive drum 307,
This is a charging charger that performs a (-) pole charging process, and employs a scorotron method having a grid on the photosensitive drum 307 side.

In the structure described above, the surface of the photosensitive drum 307 is charged by the charging charger 325, and then the laser beam is irradiated on the surface of the photosensitive drum 307 by the optical writing unit 306, so that the irradiated portion is irradiated. The potential of is decreased. As a result, the ground potential on the surface of the photosensitive drum 307 is -750 to -800 V, and the image potential is -500.
The value is about V, and an electrostatic latent image corresponding to image information is formed on the surface of the photosensitive drum 307.

Next, the structure of the developing section 308 will be described. In this embodiment, the developing unit 3 includes a first developing device 326 for black toner and a second developing device 327 for color toner.
08 is configured. Reference numeral 328 is a black toner cartridge for containing and supplying black toner, and 329 is a color toner cartridge for containing and supplying color toner.

The developing unit 308 constructed as described above is
For the electrostatic latent image formed on the surface of the photoconductor drum 307, a bias voltage of −500 to −600 V is applied to the developing roller of the first developing device 326 and the developing roller of the second developing device 327, and (−) charging is performed. The formed toner is attached to the electrostatic latent image on the surface of the photoconductor drum 307 to visualize it. Further, in the case of color copying, during the development of one color, settings such as changing the main pole position of the developing roller of the developing device of the other color are performed to selectively perform the development. As a result, the color filter 3 in the scanner unit 305
The color information of the original is read by switching 16 and the multifunctional color copy and color image editing can be performed by combining with the multiple transfer by paper conveyance and the double-sided copy function. In addition, when developing for three or more colors, three
This can be achieved by a method of arranging three or more developing devices or a revolver method of rotating and switching three or more developing devices.

In FIG. 3, 330 is a transfer charger for transferring the visible image on the photoconductor drum 307 to the conveyed recording paper, and 331 is integrally formed with the transfer charger 330 and is in close contact with the photoconductor drum 307. This is a separation charger that separates the recording paper by AC neutralization. Three
32 is a cleaning blade that removes residual toner after transfer processing on the surface of the photoconductor drum 307, 333 is a collection tank that collects and stores the waste toner removed by the cleaning blade 332, and 334 is residual charge of the photoconductor drum 307. A static elimination lamp 335 that is removed by light irradiation is a separation claw that comes into contact with the photoconductor drum 307 with a slight force to assist separation of the recording paper.

Reference numeral 336 is a density sensor using a photosensor consisting of a light emitting element and a light receiving element, and a predetermined latent image pattern is formed on the photosensitive drum 307 by the optical writing unit 306, and this latent image pattern is formed. After development, the reflection density is read by a photo sensor. This is to judge the density of an image from the ratio of the reflectance of the pattern portion after the development processing and the reflectance of the photoconductor drum 307 other than the pattern portion, and when it is light, output a toner replenishment signal. When the toner does not reach a predetermined density within a certain time after replenishment, it is determined that the toner is out, and a detection signal to that effect is output.

Further, the paper feeding unit 309 in FIG. 3 will be described. Reference numerals 337a, 337b, and 337c denote paper feed cassettes 338 for accommodating and setting recording papers of respective sizes.
Reference numerals a, 338b and 338c are sheet feeding rollers for feeding the recording sheets one by one, 339 is a registration roller for conveying the fed recording sheets to a transfer portion at a predetermined timing, and 340 is a transfer / transfer roller.
A conveyor belt 341 for conveying the separated recording paper, a fixing roller 341 which has a built-in heater and is heated to a predetermined temperature, 3
Reference numeral 42 is a pressure roller that is arranged so as to face the fixing roller 341 and be biased so as to have a predetermined pressure.

Photoreceptor drum 30 constructed as described above
The operations of the image forming unit and the paper feeding unit 309 around the periphery will be described. The copying machine main body 301 includes paper feed cassettes 337 a, 3
37b and 337c are detachably loaded. The recording paper fed by the paper feed rollers 338a, 338b, 338c is conveyed to the photosensitive drum 307 by the registration roller 339 at a predetermined timing.

The photosensitive drum 307 is rotationally driven in the clockwise direction, and at that time, the toner image formed on the photosensitive drum 307 is transferred onto the recording paper conveyed to the photosensitive drum 307 by the transfer charger 330. The recording paper that has been transferred (transferred) and is in close contact with the photosensitive drum 307 is electrostatically separated by the separation charger 331. After that, the recording paper is conveyed to the nip between the fixing roller 341 and the pressure roller 342 by the conveyance belt 340, so that the unfixed toner on the recording paper is fixed (fixing process). On the other hand, the photosensitive drum 307 after the transfer processing is the cleaning blade 3
32 removes the residual toner. Further, the charge removal lamp 334 removes the residual electric charge, and the standby state is prepared for the next copying process.

In FIG. 3, 343 is a switching claw for switching the conveying direction of the recording paper after the fixing process, 344 is a switching claw for allowing the recording paper to enter the double-sided reversing device (DPX) 304, and 345 is a re-feeding unit 346. A switching claw for advancing the recording paper to the side, 346 is a re-feeding unit for re-feeding the recorded recording paper, 347 is a tray for reversing the recording paper,
A transport roller 348 transports the recording paper to the tray 347 and then rotates in the reverse direction to re-feed the recording paper from the rear end.

A case where double-sided copying is performed in the above configuration will be described. The recording paper guided downward by the switching claw 343 is further guided downward by the switching claw 344, and is sent to the transport roller 348 by the next switching claw 345. The conveying roller 348 conveys the recording paper onto the tray 347, and when the recording paper reaches the trailing end of the recording paper, the recording paper is fed again in the reverse direction, and is fed to the refeeding portion 346 by switching the switching claw 345. Then, it is fed to the registration roller 339.

Next, the automatic document feeder (A
The configuration of the DF) 302 will be described. In the figure, 3
Reference numeral 49 is a document feed table on which a plurality of documents to be copied can be set, 350 is a side guide that guides by aligning the side edges according to the document size, and 351 is one document set on the document table 349. Paper feeding roller 352 for feeding each by one
353 is a conveyor belt for conveying the original sent by the paper feed roller 351 to a predetermined position on the contact glass 310.
Is a paper discharge tray from which the document after the copying process is discharged.

The operation of the automatic document feeder (ADF) 302 configured as described above will be described. A plurality of originals set on the original feed table 349 are aligned in the widthwise direction of the originals by the side guides 350. The set originals are fed one by one by the rotation of the feed roller 351 and the contact glass 3 by the rotation of the conveyor belt 352.
It is conveyed to a predetermined position on 10 and stopped. After that, the exposure operation is performed and the image formation is performed as described above.
When the copying process for a predetermined number of sheets is completed in this way, the document on the contact glass 310 is discharged to the discharge tray 353 by the rotation of the conveyor belt 352. The side guide 35
The size of the document is detected by counting the set position of 0 and the document feed time. As described above, the automatic document feeder (ADF) 302 automatically conveys the originals one by one onto the contact glass 310 for each copy cycle to automatically perform the copy processing operation.

Next, the structure of the sorter 303 shown in FIG. 3 will be described. In the figure, reference numerals 354a to 354x denote bins for ejecting the recording paper after the copying process in page order, page by page or at preset positions, and 355 a drive motor for rotationally driving a plurality of transport rollers.

The sorter 303 configured as described above is
Depending on the method of ejecting the recording paper ejected from the copying machine main body 301, for example, in page order (sort), page by page (stack), or a preset position of the bins 354a to 354x (mailbox). This is a device for selectively discharging the recording paper to the bins 354a to 354x. The recording paper sent by the plurality of transport rollers rotated by the drive motor 355 is guided to the selected bin 354 by switching the claws near the entrance of each bin 354.

Next, the structure of the double-sided reversing device 304 shown in FIG. 3 will be described. In the figure, reference numeral 356 is a conveying roller for accumulating recording sheets sent from the copying machine main body 301, and 35.
7 is a tray for accumulating the recording papers sent from the conveying rollers 356, 358 is an alignment guide for aligning the recording papers,
Reference numeral 359 denotes a conveyance roller for aligning and conveying the recording paper, and 36.
Reference numeral 0 denotes a refeed roller for refeeding the recording paper.

Double-sided reversing device 30 constructed as described above
The operation of No. 4 will be described. When performing a double-sided copy collectively for a plurality of sheets, the recording paper is sent to the double-sided reversing device 304 by switching the switching claw 343. The fed recording sheets are stacked on the tray 357 by the transport rollers 356. At this time, the conveyance rollers 359 and the alignment guide 358 align the side faces of the recording paper in the vertical and horizontal directions. Tray 35
The recording sheets accumulated on the sheet 7 are sent to the sheet re-feeding unit 346 by the sheet re-feeding roller 360, and are sent to the registration roller 339 to transfer the toner image on the back surface of the recording sheet as described above. As described above, the re-feeding unit 346 of the copying machine main body 301 can perform double-sided copying only for each sheet, but by mounting the double-sided reversing device 304, a plurality of double-sided copies can be collectively performed.

Reference numeral 361 in FIG. 3 is the copying machine main body 3.
01 is a main motor that rotationally drives each roller,
Reference numeral 362 is a fan motor for maintaining the temperature inside the copying machine body 301 within a certain value.

FIGS. 6 and 7 are circuit diagrams showing the electrical equipment control section of the digital copying machine according to the present invention. In the figure,
Reference numeral 601 denotes a CPU (a), 6 for controlling sequence-related
Reference numeral 02 denotes a CPU (b) that controls operations, and the CPU (a) 601 and the CPU (b) 602 are connected by a serial interface (RS232C).

Further, 603 is a paper size sensor for detecting the size of the recording paper in the paper feeding section 309, 604 is a sensor such as a registration sensor and a paper ejection sensor, and 605 is each condition setting (for example, recording by the registration roller 339). A dip switch 606 provided for the loop amount of the paper, a margin amount of the leading edge of the recording paper, and the like applies high-voltage power to the charging charger 325, the transfer charger 330, the separation charger 331, and the developing bias electrode (not shown). High voltage power supply, 607
Is a relay driver for driving and controlling a power relay, 608
Is a toner replenishing solenoid, a solenoid such as a paper feed clutch, a solenoid driver for driving and controlling clutches, 6
Reference numeral 09 is a motor driver for driving and controlling motors such as the main motor 361 and the fan motor 362.

Reference numeral 610 is the fixing temperature of the fixing roller 341, the photosensor input of the density sensor 336, the monitor input of the semiconductor laser 401, and the analog input portion to which the reference voltage of the semiconductor laser 401 is input. 611 is the use management for each operator. A key card unit for reading a key card for use in a computer, 612 is a ROM storing programs such as control conditions, 613 is an address decoder for the CPU (a) 601, and 614 is connected to each sensor (603 to 605). RAM, I / O port, timer, 615 are double-sided reversing device 304, I / O port for high-voltage power source 606, 616
Is a relay driver 607, a solenoid driver 608,
I / O port for motor driver 609, 617 is connected to the sorter 303 by serial interface
ARP, 618 is an A / D converter for converting analog data into digital data and outputting it to the optical writing unit 306, 6
Numerals 19a to 619c are timer counters for executing processing based on the set time widths, and 620 is an address latch.

Reference numeral 621 denotes a gate array which outputs three-direction image data (DATA0 to DATA7) of the image processing substrate 319, the scanner control circuit 623, and the application circuit 624 and a synchronizing signal in response to a select signal from the CPU (b) 602. 622 is an address decoder for the CPU (b) 602, 623 is a scanner control circuit, and 624 is an external device (facsimile device, printer, etc.) and CPU.
(B) The interface 602 is an application circuit that outputs a signal based on preset information.

Reference numeral 625 denotes an operation unit including a key input unit for inputting operations such as a copy mode and a display unit for displaying the status of the copying machine, and 626 an editor for performing image editing processing (corresponding to the editor 100 in FIG. 1). ), 627 is a calendar IC that stores the date and time and outputs them to the CPU (b) 602 at any time, 628 is a ROM that stores a program for the CPU (b) 602, and 629 is an R for the CPU (b) 602.
AM and 630 are USARP connected to the operation unit 625 through a serial interface, and 631 is the scanner control circuit 6
23 to connect with 23 by serial interface
P and 632 are USARP connected to the application circuit 624 via a serial interface, and 633 is a USA connected to the editor 626 via a serial interface.
RP and 634 are address latches for the calendar IC 627.

The operation of the electrical equipment control section of the digital copying machine configured as described above will be described. Sequence-related control is performed by the CPU (a) 601 and control of paper conveyance, image forming conditions, and the like is performed. For example, the paper feed cassette 33
The size and feeding direction of the recording paper set in No. 7 are detected by the paper size sensor 603, and paper conveyance, image control, etc. are performed based on the detection signal. In addition, the signals of the sensors 604 such as the registration sensor and the paper discharge sensor and the setting conditions of the DIP switch 605 are input to the CPU (a) 601 to perform jam detection, paper interval control, and image formation control. Be seen.

Further, the double-sided reversing device 304 has a motor for making the width of the recording paper uniform, a paper feed clutch, a solenoid for switching the conveying path, a solenoid for vertically moving a roller for bringing the recording paper to the leading end, a paper presence sensor, and a paper width uniform. I / O is performed by the home position sensor of the side fence and the sensor related to recording paper conveyance. The high voltage power supply 606 applies high voltage power of a predetermined value to the charging charger 325, the transfer charger 330, the separation charger 331, and the developing bias electrode (not shown) at a predetermined timing. Drivers such as a relay driver 607, a solenoid driver 608, a motor driver 609, etc. are connected to a CPU such as a paper feed clutch, a registration clutch, a drive motor, etc.
(A) On / off control is executed based on the control signal 601.

The sorter 303 is connected by a serial interface, and conveys the recording paper at a predetermined timing by the control signal of the CPU (a) 601 and discharges it to each bin 354. The fixing temperature of the fixing roller 341, the photosensor input of the density sensor 336, the monitor input of the semiconductor laser 401, and the reference voltage of the semiconductor laser 401 are input to the analog input unit 610. This fixing temperature is determined by the fixing roller 34
The heater in the fixing roller 341 is controlled to be turned on / off so that the temperature of the fixing roller 341 falls within a certain range by an input from a thermistor (not shown) arranged in contact with or close to the surface of 1. The photosensor input of the density sensor 336 inputs the photosensor pattern formed at a predetermined timing by a phototransistor, detects the photosensor pattern (pattern density), and controls the toner replenishing clutch to turn on / off the toner density control. Is going.

Further, an A / D is provided as an adjusting mechanism for keeping the output value of the laser beam from the semiconductor laser 401 constant.
The analog inputs of converter 618 and CPU (a) 601 are used. This is controlled such that the monitor voltage during oscillation of the semiconductor laser 401 matches a preset reference voltage of the semiconductor laser 401 (for example, the output value is set to be 3 mW).

The image processing board 319 generates timing signals for masking, trimming, and erasing image data, a photo sensor pattern of the density sensor 336, and outputs a video signal to the semiconductor laser 401. The gate array 621 outputs the image data continuously transmitted in 2-bit parallel from the scanner unit 305 to the synchronization signal P from the optical writing unit 306.
Image writing position signal RGA synchronized with MSYNC
It is converted into a 1-bit serial signal synchronized with TE and output to the image processing board 319.

Next, operation-related control will be described below. CPU (b) 602 (main CPU)
Controls multiple serial ports and calendar IC 627. A sequence control CPU (a) 601 is connected to the plurality of serial ports, and an operation unit 62 is also provided.
5, scanner control circuit 623, application circuit 6
24, an editor 626, etc. are connected.

In the operation unit 625, the key input information by the operator is serially transmitted to the CPU (b) 602, and the CP
The display is turned on by serial reception from the U (b) 602. The scanner control circuit 623 performs serial transmission processing for driving control of the scanner servo motor, image processing, and image reading information to the CPU (b) 602, and AD.
Interface processing between the F302 and the CPU (b) 602 is performed.

The application circuit 624 exchanges preset information through an interface with an external device (facsimile device, printer, etc.).
Further, the editor 626 serially transmits the image edit data (masking, trimming, image shift, etc.) input from the operation unit 625 to the CPU (b) 602, and inputs the content of image edit processing. The calendar IC 627 reads the stored date and time by the CPU (b) 602 at any time, and displays the current time on the display unit of the operation unit 625 and timer control by setting the on time and off time of the copying machine. Etc. are executed.

FIG. 8 is a block diagram showing the overall configuration of the control system in the digital copying machine according to the present invention. In the figure, 701 is a main control board that controls the entire digital copying machine, and 702 is an AD that controls the ADF 302.
F control plate, 703 is a sorter control plate for controlling the sorter 303, 704 is a double-sided control plate for controlling the double-sided reversing device 304, 705 is a paper feed control plate for performing various controls of the paper feed unit 309, and 706 is an application system. , 707 are sensors such as a fixing sensor, a density sensor 336, a resist sensor, etc., 708 is a fan such as an APL fan, an exhaust fan, etc.
Reference numeral 709 is a counter such as a total counter or a key counter, and 710 is a fixing thermistor for detecting the surface temperature of the fixing roller 341.

Further, 711 is an LD control plate for controlling the semiconductor laser 401, 712 is a PWM control plate, 713 is a drive plate for driving the polygon motor 321, 714 is a drive plate for driving the main motor 361, and 715 is a fixing roller 341. Fixing heater and temperature fuse for preventing overheating, 716 is an AC drive plate that serves as an AC power source for the fixing heater, and 717 is a DC power source that rectifies the AC from the AC driver 716 into DC and serves as a drive source for each DC drive component. , 71
8 is a toner replenishment SOL (solenoid) of the developing unit 308,
A blade SOL (solenoid) that performs abutting and separating operations of the cleaning blade 332 with respect to the photosensitive drum 307, first to third pickup SOL (solenoid),
First and second locks SOL (solenoid), 719 are registration CL (clutch) for drivingly transmitting to the registration rollers 339, rising relay CL (clutch), first to third sheet feeding CL
(Clutch), 720 are sensors related to the paper feeding unit 309,
Reference numeral 721 is an intake fan, and 722 is a conveyance fan that adsorbs the recording paper of the conveyance unit 340.

Further, 723 is each sensor of the sorter 303, 724 is a drive motor for rotationally driving each roller of the sorter 303, 725 is a solenoid for switching the entry of the recording paper into each bin 354 of the sorter 303, and 726 is both sides. Solenoids of reversing device 304, 727 clutches of double-sided reversing device 304, 728 jogger motor for aligning sheets of double-sided reversing device 304, 729 sensors of double-sided reversing device 304, 730 sensors of ADF 302 , 731 is each solenoid of the ADF 302, 73
Reference numeral 2 is a motor for rotatably driving each conveying roller of the ADF 302, 733 is a switch for detecting the set state of the ADF 302 and a switch for switching the paper thickness of the original, and 734 is a display unit for displaying the number of originals of the ADF 302, the jam condition and the like. .

Further, 735 is a scanner motor for scanning and driving the scanner unit 305, and 736 is a scanner motor 735.
Rotary encoder connected to the drive shaft of
7 is a lamp control circuit for controlling the lighting of the exposure lamp 311;
Reference numeral 738 is an HP sensor for detecting the reference position of the sub-scanning drive mechanism, 739 is ADFSOL (solenoid), 740 is APSSOL (solenoid), and 741 is a fluorescent lamp heater and a thermistor for temperature control.

Further, 742 is an image preprocessor (IPP) having the functions of shading correction, black level correction and light amount correction, and 743 is an MTF correction function (spatial frequency high frequency emphasis), speed conversion function (magnification), γ conversion function. , An image process unit (IPU) having a data depth conversion function (8 bit / 4 bit / 1 bit conversion), a memory device (MEM) 744 for taking in the output of the IPU 743,
An external storage device 745 inputs / outputs data to / from the memory device 744.

FIG. 9 is a block diagram showing the scanner section 305 in the digital copying machine according to the present invention. In the figure, 801 is a timing control circuit that outputs each signal based on an instruction from the scanner control circuit 623, 802 is a signal processing circuit that performs image signal amplification and light amount correction processing, and 803 converts analog data into digital data. An A / D converter 804 is a shading correction circuit that corrects distortion of image data.

The scanner unit 305 configured as described above
The image reading operation will be described. The scanner control circuit 623 receives a lamp control circuit 737, a timing control circuit 801, and an IPU 7 based on an instruction from a printer control unit (not shown).
The electric variable magnification circuit 43 and the scanner motor 735 are controlled. The lamp control circuit 737 is the scanner control circuit 623.
The exposure lamp 311 is turned on / off and the light amount is controlled based on the instruction from. The electrical scaling circuit of the IPU 743 performs electrical scaling processing based on the magnification data on the main scanning side set by the scanner control circuit 623.

The timing control circuit 801 outputs each signal based on the instruction from the scanner control circuit 623. That is, when the reading of the document starts, the CCD
A transfer signal that transfers data for one line to the shift register and a shift clock pulse that outputs the data in the shift register bit by bit are output to the image sensor 318. Further, a pixel synchronization clock pulse CLK and a main scanning synchronization pulse LSY are supplied to an image reproduction system control unit (not shown).
It outputs NC and main scanning effective period signal LGATE.

This pixel synchronization clock pulse CLK is C
The signal is almost the same as the shift clock pulse input to the CD image sensor 318. In addition, the main scanning synchronization pulse LS
YNC is almost the same signal as the main scanning sync signal PMSYNC output from the sync sensor of the optical writing unit 306, but is output in response to the pixel sync clock pulse CLK. The main scanning effective period signal LGATE is output data DATA0 to DATA0.
It becomes H level at the timing when DATA7 is regarded as valid data. In this case, the CCD image sensor 318
Outputs 4800 bits of valid data per line.

When the scanner control circuit 623 receives a reading start instruction from the printer control unit (not shown), the exposure lamp 311 is turned on, the scanner motor 735 starts driving, and the timing control circuit 801 is controlled. The reading by the CCD image pickup device 318 is started. Further, the sub-scanning effective period signal FGATE is set to the H level. The sub-scanning valid period signal FGATE becomes L-level after the time required to scan the maximum reading length (in this case, the size of A size in the longitudinal direction) in the sub-scanning direction after being set to H level.

The analog signal output from the CCD image pickup device 318 is an image preprocessor (IPP).
The signal processing circuit 802 inside 741 performs amplification processing and light amount correction, and the A / D converter 803 converts the signal into a digital multilevel signal. The converted image signal is subjected to distortion correction by the shading correction circuit 804 and is input to the next image process unit (IPU) 743.

FIG. 10 shows an image process unit (I
(PU) 743 is a block diagram showing details. In the figure, 901 is an MTF correction unit that corrects blurring or deterioration of an image signal, 902 is a scaling unit that electrically scales the image signal based on a designated magnification, and 903 is an input / output characteristic of the image signal. A .gamma.-converting unit 904 for correcting so as to be optimum for the process characteristics is a data depth switching mechanism unit including a 4-bit conversion circuit 905, a binarization circuit 906, a dither circuit 907, a changeover switch 908, and a changeover switch 909. is there.

The data processing operation of the image process unit (IPU) 743 configured as above will be described. The image signal input from the image preprocessor (IPP) 741 is high-frequency emphasized by the MTF correction unit 901. Next, the scaling processing unit 902 performs electrical scaling to a predetermined magnification, and the γ conversion unit 903 optimizes the input / output characteristics of the image signal with respect to the image forming process characteristics. γ conversion unit 9
The image signal output from 03 is input to the data depth switching mechanism unit 904 and converted into a predetermined quantization level.

This data depth switching mechanism section 904 is 4 bi
The t conversion circuit 905 outputs 4 bit DATA.
The binarization circuit 906 converts the inputted 8-bit multi-valued data into binary data by a preset fixed threshold value and outputs 1-bit DATA. Dither circuit 907 is 1
An area gradation is formed by bitDATA. At this time, the changeover switch 909 selects and outputs the output of the binarization circuit 906 or the dither circuit 907. Then, the changeover switch 908 uses the three data (8 bit DAT)
One of the data formats (A, 4 bit DATA, 1 bit DATA) is selected and DATA0 to DATA7 are output. The image process unit (IPU) 7
The output data format of 43 is shown in FIG.

FIG. 12 is a block diagram showing a memory system according to the present invention. In the figure, 1101 to 110
3 is a multiplexer MUX1, MUX2, MUX3 for selecting and switching a plurality of input data, and E in the figure
XTIN indicates an image data input signal from the outside,
EXTOUT indicates an output signal to the outside.

An operation example of the memory system configured as above will be described. For example, a single exposure scan of the scanner unit 305 causes a plurality of image process units (IP
U) When outputting a copy with the parameters of 743 changed, first, MUX1 is set to A, MUX2 when scanning the scanner.
Is set to B and MUX3 is set to A, and one copy is output. The raw data at this time is input to the memory device (MEM) 744 via the MUX2.

Next, for the second and subsequent sheets, MUX1 is set to B, the data from the memory device (MEM) 744 is input to the image process unit (IPU) 743, and the MU
Output to the printer (PR) via X3. Then 1
Image process unit (IP
U) Change the parameters of 743. Also, 1bitD
If you want to store compact data like ATA,
The MUX2 is set to A, and the output of the image process unit (IPU) 743 is set to the memory device (MEM) 744.
Take in. At this time, the printer (PR) switches to the binary data (1 bit) mode and executes the copying process.

FIG. 13 is an explanatory diagram showing the flow of the image signal according to the present invention, and shows the data flow by the processing described in FIG. In this way, both the data processed by the image processing unit (IPU) 743 and the raw data can be loaded into the memory device (MEM) 744.

FIG. 14 shows the memory device (MEM) 74.
4 is a block diagram showing an example of the internal configuration of FIG. In the figure, reference numeral 1301 denotes a compressor (COM) that performs data compression processing.
P), 1302 is an image process unit (IPU)
Multiplexers MUX4, 1 for selecting and switching data input from the H.743 and the compressor (COMP) 1301
Reference numeral 303 denotes a memory unit for storing the compressed data processed by the compressor (COMP) 1301 in addition to the actual data, 13
Reference numeral 04 denotes an expander (EXP) for performing data expansion processing, 13
05 is a memory unit 1303 and an expander (EXP) 13
Multiplexers MUX5 and 1306 that select and switch the data input from 04 are error detectors that monitor the error signals of the compressor (COMP) and the decompressor (EXP) 1304.

The memory device (ME
M) 744 has a compressor (COMP) 1301 arranged in front of the memory unit 1303, and an expander (EXP) 130.
4 is arranged after the memory unit 1303, and further,
Multiplexer MUX4 and Multiplexer MUX5
By providing each of them connected to the memory unit 1303, actual data and compressed data can be selectively stored. That is, when storing the actual data in the memory unit 1303, the multiplexers MUX4 and MUX5 are set to A, respectively. In addition, the compressor (CO
MP) 1301 data processed by the memory unit 1
When storing in 303, the multiplexers MUX4 and MUX5 are set to B respectively. In the above configuration, the compressor (COMP) 1301 performs memory processing according to the scanning speed of the scanner unit 305, and the decompressor (EXP) 1304 performs processing according to the speed of the printer (PR).

FIG. 15 shows the above memory unit 1303.
3 is a block diagram showing an example of the internal configuration of FIG. In the figure, 1401 is an input data width converter for processing code data which is image data and compressed data, 1402 is a memory block for storing the number of packed data, 140
3 is an output data width converter for processing code data which is image data and compressed data, and 1404 is data at a predetermined address of the memory block 1402 corresponding to the number of data packed by the input data width converter 1401 and the memory data width. The direct memory controller (DMC1) 1405 for performing the writing / reading operation of the data is written / read to / from a predetermined address of the memory block 1402 corresponding to the number of data packed by the output data width converter 1403 and the memory data width. It is a direct memory controller (DMC2) that operates.

Memory unit 1 configured as described above
The 303 includes an input data width converter 1401 and an output data width converter 1403 on the input side and the output side of the memory block 1402, respectively.
5)) and the compressed data from the compressor (COMP) 1301 are processed. The direct memory controller (DMC1) 1404 and the direct memory controller (DMC2) 1405 store data at a predetermined address of the memory block 1402 according to the number of data packed by the input data width converter 1401 and the output data converter 1403 and the memory data width. Write / read processing is performed.

FIG. 16 is an explanatory diagram showing the format of the image data processed in FIG. (A) Type 1 is 1-bit data, (b) Type 2 is 4-bit data,
(C) Type 3 indicates 8-bit data. The speed of the image data from the scanner or the speed of the image data to the printer in the normal case is constant regardless of the 8-bit data, 4-bit data, and 1-bit data because the period of 1 pixel is fixed in the apparatus.

Further, in this embodiment, the MSB (Most SIGNIFICANT) of eight data lines is used.
Bit: 1 bit from the most significant bit of data) side
It is defined by t data, 4 bit data, 8 bit data and MSB justification. This data is stored in memory block 1
The blocks to be packed and unpacked to the data width (16 bits) of 402 are the input data width converter 1401 and the output data width converter 1403. Therefore, since the memory can be used according to the depth of the data by performing the pack processing, the memory device (MEM) 744 can be effectively used.

FIG. 17 is a block diagram showing a configuration example in which a pixel process unit (PPU) is connected to the memory unit 1303. In the figure, 1601 is a logical operation between image data (for example, AND, OR, EOR,
Pixel process unit (PP) that performs NOT
U) and 1602 are image process units (IPU)
743 and Pixel Process Unit (PPU) 1601
The multiplexers MUX6, 1603 for selecting and switching the data input from are multiplexers MUX for selecting and switching the data input from the pixel process unit (PPU) 1601 and the memory unit 103.
7

As described above, the memory device 74 shown in FIG.
4, the pixel process unit (PPU) 1601 is replaced with the memory unit 1303 instead of the compressor (COMP) 1301 and the decompressor (EXP) 1304.
It is configured to be disposed outside the. In such a configuration,
The pixel process unit (PPU) 1601 logically operates the memory output data and the input data and outputs it to the printer (PR). Further, the memory output and input data (for example, data from the scanner unit 305) can be logically operated and stored again in the memory unit 1303. The output destination printer (PR) and the memory unit 1303 are switched by the multiplexers MUX6 and MUX7. Such a function is generally used for image synthesis processing, for example, image synthesis processing such as overlaying overlay on scanner data.

FIG. 18 is a block diagram showing the structure of the external storage device 745 that executes the image data storage process. In the figure, 1701 is an interface (I / F) for controlling input / output of image data, 1702 is a floppy disk controller (FDC) for controlling a floppy disk driver (FDD) 1703, 1703.
Is a floppy disk driver (FDD) that drives a floppy disk (FD) as a storage medium, 1704 is a hard disk controller (HDC) that controls writing / reading of a hard disk (HDD) 1705, 1705
Is a writable / readable hard disk (HDD), 170
6 is a floppy disk controller (FDC) 170
2 and hard disk controller (HDC) 170
A file controller (FC) for controlling 4
Is a line drawer (LD) for controlling the interface (I / F) 1701.

The operation of storing the image data in the external storage device 745 in the above configuration will be described. Image data on floppy disk (FD)
In the case of saving to the floppy disk driver (FDD) 1703, the data is output from the EXTOUT shown in FIG. 12 to the floppy disk controller (FDC) 1702 controlled by the file controller (FC) 1706 via the interface (I / F) 1701. Store on the upper floppy disk (FD). Further, the hard disk controller (HDC) 1704 executes writing / reading on the hard disk (HDD) 1705 under the control of the file controller (FC) 1706. In addition,
A hard disk (HDD) 1705 stores format data and overlay data that are used for general purposes and can be used as needed.

FIG. 19 is a block diagram showing an example in which recovery is possible when the processing speed of image data compression and expansion is not in time. In the figure, reference numeral 1801 denotes a memory management unit (MMU) for controlling memory by enabling input / output of two input data and one output data to / from the memory unit 1804 at the same time.
02 is a memory unit 1804 and an expander (EXP) 18
A multiplexer (MUX8) that selects and switches data input from 05, 1803 is a compressor (COMP) that performs data compression processing, and 1804 is compressed data that is processed by the compressor (COMP) 1803 in addition to actual data. Is a memory unit for storing data, 1805 is a decompressor (EXP) for decompressing data, and 1806 is a compressor (CO).
It is an error detector that monitors the error signals of the MP) 1803 and the expander (EXP) 1805.

In the above configuration, the memory unit 18
A compressor (COMP) 18 is provided at the same time as the scanner scanning 04.
The data compressed by 03 and the image data are input. The data input to the memory unit 1804 is stored in different memory areas, and the compressed data is input to the decompressor (EXP) 1805 as it is for decompression processing. Memory unit 180 for all data for one page
Compressor (COMP) 1 by the time input to 4 is completed
When the processing time by the 803 and the decompressor (EXP) 1805 is in time and the processing is completed normally, the memory area of the compressed data is left and the raw data area is released.

Here, the error detector 1806 causes the compressor (COMP) 1803 or the decompressor (EXP) 18 to operate.
When the error signal from 06 is detected, the data area of the compressed data is immediately canceled and the raw data is adopted. In this way, the compressor (COMP) 1803 and the expander (EXP) 1
By performing the verification process 805, high-speed and reliable data processing and effective use of the memory area can be realized.

Although the memory management unit (MMU) 1801 enables dynamic allocation of the memory area as described above, as another method, two memory units for raw data and compressed data are provided. However, similar processing can be performed. Such a configuration is used for applications such as electronic sorting in which a plurality of pages are to be stored and the conditions to satisfy both the number of pages to be stored and the printing speed to be output to the printer (PR) in real time must be satisfied. Then it is effective.

FIG. 20 is a block diagram showing the configuration of the application system according to the present invention.
This application system is based on the base unit 20
01 and APL (1) 2002 of the file unit,
FAX unit APL (2) 2003, ON / OFF printer unit APL (3) 2004, LAN APL (4) 2005, T / S (touch switch)
And a display unit 2006 including an LCD (liquid crystal) and the like
It consists of and. The detailed configurations and operations of these units will be described below.

[Base Unit] In FIG.
Is an engine I / F, 2008 is a page memory, 2009
Is an SCI (Small Communication Interface), 2010 is an image bus, 2011 is a system bus, 2012 is a CPU, 2013 is a scaling circuit using DRAM, 2014 is a bus aviator, and 2015 is a timer having a function of generating a predetermined clock. , 2016 is the RTC that generates the current time, 2017 is the console,
Reference numeral 2018 is a ROM in which a basic function program such as an OS is stored, 2019 is a RAM mainly used as a working memory, 2020 is a DMAC, 2021 is a rotation control unit, and 2022 is a CEP.

This base unit 2001 is a unit that executes the basic control of this system. Engine I /
The F2007 converts the image data into parallel data because it is transmitted as serial data, and conversely, converts the parallel data from the page memory 2008 into serial data by the engine I / F2007, and E
Send to XTIN. Further, since the control signal is serial, it is connected to the system bus 2011 from the engine I / F 2007 via the SCI 2009.

In the present embodiment, the page memory 2008 has a capacity for storing the size data for one page in A3, where it is converted into a bit image and EX
It also arbitrates the data speed of TIN and EXTOUT and the processing speed of the CPU 2012. Further, the scaling circuit 2013 uses the DMAC 2020 to execute the enlargement or reduction processing of the data in the page memory 2008 at high speed without the intervention of the CPU 2012.

Further, the rotation control unit 2021 is, for example, F
When the transmission original by AX transmission is A4 vertical and the reception side is A4 horizontal, the transmission side automatically reduces and transmits by 71%, and the reception side makes the image difficult to see.
Rotate it by 0 degrees, convert it to A4 landscape, and send it at the same size. Further, the rotation control unit 2021 rotates the output image by 90 degrees and outputs it by changing it to A4 portrait when the reception size is A4 landscape and the cassette size is A4 portrait when performing reception output. No need to distinguish between vertical and horizontal.

The CEP 2022 executes image data compression, expansion, and through processing. The bus arbiter 2014 transfers the data from the AGDC to the image bus 20.
1 and the process of sending to the system bus 2011 are executed. Further, the timer 2015 generates a predetermined clock, and the RTC
Generates the current time. Further, the console 2017 connected as a control terminal is used for the internal OS in addition to the processing such as reading and rewriting of data in the system.
It is also possible to execute software development using the debug tool, which is one of the above functions.

[APL (1)] This APL (1) 200
2 is a file unit. In FIG. 20, 202
3 is a SCSI (Small Computer System Interface), which is an HDD (Hard Disk Drive) 2024, ODD (Optical Disk Drive) 2
025, FDD (Floppy Disk Drive) 20
26 is an interface. Also, 2027 is R
OM, HDD202 via SCSI2023
4, the control program of the filing system which controls ODD2025 and FDD2026 is stored.

[APL (2)] This APL (2) 200
Reference numeral 3 is a FAX control unit. In FIG.
Reference numeral 2030 is a G4 FAX controller, which is a unit that controls a G4 protocol and supports G1, class 2, and class 3. The G4 FAX controller 2030 also supports ISDN,
In 64, 2B + 1D (64KBx2p + 16K
B) line, G4 / G4, G4 / G3, G3
/ G3, G4 only, or G3 only is a selectable unit.

Reference numeral 2031 is a G3FAX controller, which is also provided with a G3FAX protocol for controlling the G3 protocol, a modem for converting a digital signal into an analog signal by an analog line. Reference numeral 2032 denotes an NCU (Network Control Unit), which has a dial function or the like for connecting to the other party or receiving an incoming call from the other party using an exchange.

Reference numeral 2033 is an SAF (store and forward), which is used to store image data (including image data, code data, etc.) at the time of executing FAX transmission and reception. ODD
Etc. are used. Reference numeral 2024 denotes ROMs 2 and 20 in which programs for controlling APL (2) are stored.
Reference numeral 25 denotes a RAM used as a working memory, to which a non-volatile battery is connected as a backup power source, which stores a destination telephone number, a destination name, data for controlling a FAX function, and the like.
/ S, LCD is used for easy setting.

[APL (3)] This APL (3) 200
Reference numeral 4 is a control unit for an online printer and an offline printer. In FIG. 20, reference numeral 2040 denotes an FDC (floppy disk controller) that controls the floppy disk 2041. Further, some of the recent floppy disks support SCSI, and here, SCSI and ST506 interfaces are supported. Reference numeral 2042 is an SCI (serial communication interface) used for connection with a HOST computer. Similarly, 20
Reference numeral 43 is a Centro I / F used for connection with a HOST computer.

An emulation card 2044 has the following functions. That is, HO
When looking at the specifications of the printer from the ST computer, for example, many manufacturers such as NEC and EPSON are currently selling the products, and the specifications are different, so that the functions of these printers are the same when viewed from the HOST computer. Otherwise, the software used in the HOST computer will not work. In order to solve the above problem, the emulation card 2044 is attached, and the software stored therein causes the software to operate as a printer of each manufacturer when viewed from the HOST computer.

Reference numeral 2015 denotes an AGDC (Advanced Graphics Display Controller), which uses the code data sent from the HOST computer as FO in the CGROM 2046 and CG card 2047.
The NT image is developed in the page memory 2008 at high speed. Further, 2048 is a ROM 3 in which these control programs are stored. CGROM
(Character generator ROM) 2046 stores FONT data corresponding to code data,
Also, the CG card 2047 is an externally attached CGFONT, and the contents are the same as the CGROM 2046.

[APL (4)] This APL (4) 200
Reference numeral 5 is a unit for controlling the LAN. In the figure,
2050 is a LAN controller, and is currently in operation
It controls AN, such as Internet, Omni, and Star Run. In addition, FAX, A of the above APL (2) 2003
The LAN of PL (4) works in the background even when another APL is operating.

[Display Unit] This display unit 200
At 6, the LCD and the touch switch are controlled. Figure 2
In 0, 2060 is an LCD, which can display graphics and characters.
The second level code of K and Kanji is stored. Also,
2062 is TSC (touch switch controller)
Then, the control of T / S 2063 is executed. T / S20
63 is divided into X and Y lattices, and the size of the switch used by the operator can be freely set by determining the number of lattices for one key by the TSC 2062. Further, the LCD 2060 and the T / S 2063 have a two-layer structure, and the key size corresponds to the key frame of the LCD 2060.

FIG. 21 is an explanatory view showing the external structure of the operating portion according to the present invention. In the figure, 2101 is a ten-key pad for inputting numerical values such as the number of copies, 2102 is a touch panel on which operation statuses and messages are displayed, 2103 is a program key for registering and calling frequently used settings, and 2104 is a function. Guidance keys for displaying explanations and operating methods, 2105 is a brightness adjustment knob for adjusting the brightness of the display screen, and 2106 is a mode clear / remaining heat that cancels the set contents or presses for 1 second or more to enter a residual heat state. A / timer key 2107 is an interrupt key used when an original is interrupted during copying to copy another original.

FIG. 22 is an explanatory diagram showing the configuration of the touch panel detection circuit of the operation unit according to the present invention. In the figure, 2201 is a controller for controlling the entire circuit,
2202 is an A / which converts an analog signal into a digital signal.
It is a D converter.

In the touch panel detection circuit, the controller 2201 sets the detection terminal to the High state, and X1,
Since X2, Y1, and Y2 are set based on the combination table shown in FIG. 23, and the Y1 and Y2 circuits are pulled up by resistors, Y1 is + when the touch panel is OFF.
When it is ON, it becomes 0 (V). Therefore, from the output of the A / D converter 2202 to ON / OF
Check F condition. Further, the controller 2201 switches to the measurement mode when it detects the touch panel ON state. In the X direction, X1 is +5 (V) and X2 is 0 (V).
Then, the potential at the input position is connected to the A / D converter 2202 through Y1 and the coordinates are calculated. Further, the coordinates in the Y direction are calculated in the same manner by switching the circuits, and the detection circuit detects the pressed position of the touch panel as described above.

FIG. 24 is a block diagram showing the structure of the operation unit according to the present invention. In the figure, 2401 is a CPU that controls the entire operation unit, 2402 is an address latch,
2403 is a ROM, 2404 is a system reset connected to the CPU 2401, 2405 is an address decoder,
2406 is an LED driver, 2407 is a keyboard, 2
Reference numeral 408 is an LCD controller. The LCD controller 2408 has an LED driver 2406, a keyboard 2407, an analog touch panel 2412, L in addition to an address bus and a data bus from the CPU 2401.
A CD (liquid crystal) module 2411, a display data ROM 2409, a RAM 2410, etc. are connected. An optical transceiver 2413 that executes serial communication with the outside is connected to the CPU 2401.

In the above structure, the address signal from the CPU 2401 is taken into the address latch 2402 and controlled by the signal from the CPU 2401. A part of the address signal output from the address latch 2402 is input to the address decoder 2405, where a chip select for each IC is created and used for creating a memory map. In addition, the addresses are memories such as ROM and RAM, and LC
The D controller 2408 enters and is used for addressing.

On the other hand, the data bus from the CPU 2401 is connected to the memory and the LCD controller 2408, and bidirectional data communication is executed. In addition, the LCD controller 2408 uses the signals from the keyboard 2407 and the touch panel 2412 to read the ROM 2409 and RA.
Display data is created from the stored data of M2410, and LC
The display on the D module 2411 is controlled.

FIG. 25 is an explanatory diagram showing a display example of a liquid crystal display screen. In the figure, 2501 is an automatic density key for automatically adjusting the image density, 2502 is an automatic paper key for automatically selecting the recording paper set in the apparatus, 25
Reference numeral 03 is a paper designation scaling key for designating enlargement / reduction processing according to the recording paper size to be copied.
A liquid crystal display such as% is made. Also, 2504 is a message area that displays messages such as "You can copy" and "Please wait", 25
Reference numeral 05 denotes a copy number display section for displaying the set number of sheets in the upper stage and the number of copied sheets in the lower stage, and 2506 is a sort key for designating a process of aligning copies one by one in page order.
Reference numeral 7 is a stack key for designating a process for sorting the copies into pages, and 2508 is a staple key for designating a process for binding the sorted recording sheets one by one. Also,
Reference numeral 2509 is a special document feed key, 2510 is a cover / insert sheet key, 2511 is an erase / move key, 2512 is a double-sided / page continuous copying key, and 2513 is a scaling key.

FIG. 26 is an explanatory diagram showing a screen display example by pressing the scaling key. When the scaling key 2513 is pressed, the scaling setting screen is scrolled up from the bottom of the screen as shown in the figure, and the scaling setting screen is for fixed scaling (scaling mode in which scaling is set in advance). The key is set. Here, for example, when the key of the 71% portion is pressed, the scaling factor of 71% is selected and the scaling process of the 71% is executed. Also, on this screen, a zoom key and a size scaling key for selecting a scaling mode other than the standard scaling are set in the left direction of the screen.

Further, the development display of the liquid crystal display screen is performed not only from the touch panel but also by the hard key. FIG. 27 is an explanatory diagram showing an example of screen development by pressing the area processing key of the hard key. In the figure, when the area processing key is pressed, the area processing type selection screen is displayed as shown in (b), and the creative editing key 2701 and the coloring editing key 2702 are set. Then, for example, the creative editing key 270
When 1 is pressed, a setting screen as shown in (c) is displayed.

Further, by using a combination of existing hard keys, expansion processing to a special screen is also performed.
For example, after the mode clear / remaining heat / timer key 2107 is pressed, the clear / stop key is continuously pressed to expand the screen to the user program mode in which the operator individually sets the usage conditions.

FIG. 28 is an explanatory diagram showing a screen display example in the user program mode. In the figure, after the mode clear / remaining heat / timer key 2107 is pressed, the clear / stop key is continuously pressed to display the user program mode menu screens of screens (b) to (d). For example, if you press the special tray setting “2” on the menu screen (b),
The special tray setting screens such as the screens (e) and (f) are developed, and it is possible to set the cover-only tray, the slip-only tray, and the like according to the convenience.

As another example of the above, when the user code setting key of "9" on the menu screen (d) in the user program mode is pressed, the screen (g) is expanded and the copy user is identified by a specific operator. It is expanded to the screen (h) where the user code for limiting the number of copies to each operator can be set or a user code for managing the number of copies for each operator can be set.

FIG. 29 is an explanatory diagram showing the structure and mounting position of the APS sensor. In the figure, 2901 is AP
It is an S sensor and has a configuration in which an LED 2902 is used as a light emitting element and three light receiving elements 2903 are arranged at predetermined positions. The APS sensor 2901 is arranged below the contact glass 310 as shown in the drawing, and is attached to the positions of length 1 and length 2 and the width position, respectively.

With the above configuration, the APS sensor 2
Reference numeral 901 is for reading the length and width of a document without performing prescanning and detecting the document size. That is,
A light receiving element 29 of a type that disperses light from the LED 2902 in the APS sensor 2901 into three beams and receives the light at three locations.
The contact glass 310 is seen through the inside of the optical system, and only the reflected light from the document surface is received to detect the length and width of the document. The APS sensor 2901 is always in the ON state and always reads the size data.

FIG. 30 is an explanatory diagram showing the timing for determining the size data by the APS sensor. In the figure, reference numeral 3001 is a pressure plate size sensor using a photo interrupter for detecting the opening / closing operation of the pressure plate or the opening / closing operation of the ADF.

In the above, size data is always sampled, and there are the following two methods for determining the document size. That is, (1) When the original to be read is set on the contact glass 310 and then the pressure plate or the ADF is closed, the original size is determined when the pressure plate size sensor 3001 becomes unshielded → shielded. (2) When the start key for starting copying is pressed with the pressure plate or ADF open, the document size is determined by the data immediately after the start key is turned on.

As described above, after the size of the document set by the APS sensor 2901 is fixed, the document image is read into the editor 100. The reading of an image is started by pressing the reading key of the operation unit or the start key 201 on the editor 100, the read image data is displayed on the LCD panel 103 of the editor 100, and the area designation standby state is set.

FIG. 31 is a flow chart showing the display processing of the effective image area for the copy mode according to the present invention. In the figure, when this process is started, first, a copy mode setting process is executed (S3101). This is to set the copy mode according to each mode key input by the operator through the operation unit 625. Next, it is determined whether or not the original has been set (S3102). That is, the presence / absence of a document is confirmed by a document detection sensor (not shown or using a signal from the APS sensor 2901) provided inside the contact glass 301.
When it is determined in step 3102 that the original has been set, it is further determined whether or not an image is already displayed on the editor 100 (S3103).

If it is determined in step 3103 that the image is not already displayed, the image reading process is executed (S3104), and the scanner unit 3 is displayed on the editor 100.
The image read by 05 is displayed. Further, after executing the processing of step 3104, or when it is determined in step 3103 that an image has already been displayed, the image area transferred to the recording paper based on the copy mode set in step 3101. Is calculated, and a copy area calculation process for displaying the original image on the editor 100 is executed (S3105). Then, the process returns to step 3101.

On the other hand, when it is determined in step 3102 that the document is not set,
It is determined whether or not an image is displayed on the editor 100 (S3106). If it is determined that the image is displayed, the displayed screen is erased (S31
07), and returns to step 3101 above.

FIG. 32 is a flow chart showing details of the copy area calculation processing. In the figure, when this processing is started, first, the effective image area is calculated from the recording paper size and the copy magnification. The effective image area is calculated by the following formula from the vertical dimension, the horizontal dimension, and the copy magnification of the recording paper calculated from the recording paper size of the paper feed stage set by the copy mode setting (S3201). That is, assuming that the recording paper conveyance direction (sub-scanning direction) is vertical, the vertical size is x, and the horizontal size is y, x = recording paper vertical dimension / vertical magnification y = recording paper horizontal dimension / horizontal magnification .

Next, when the binding margin mode is set in the copy mode setting, the image area in the recording paper conveyance direction is reduced by the binding margin amount, and therefore the calculation is performed (S32).
02). That is, x '= x- (binding amount) y' = y- (binding amount) is calculated. Further, as a result of the above calculation processing, the origin ~ (x, y) or the origin ~ (x ', y').
A rectangular copy area having a diagonal line is displayed on the editor 100 (S3203).

FIG. 33 is an explanatory diagram showing an editor display and output example (1) according to the present invention. (A) shows an example of a document to be read (in this case, a picture of a track), (b) shows a display example of the document in the editor 100, and (c) shows an image output example. That is, the document (a) is scanned by the scanner unit 3
Read by 05, LCD panel 1 of editor 100
The image is displayed in 03. As shown in FIG. 33 (b), the effective image area 3301 calculated by the above-mentioned copy area calculation processing is displayed on the editor 100, and the actual copy area and recording paper size currently selected are actually displayed. The area to be recorded on the recording paper is displayed so that it can be checked at a glance. Therefore, when the copy process is performed in this display state, the output result is as shown in FIG. 33C, and if the operator has copied the entire picture of the document (a), in this case, it is a miscopy. .

FIG. 34 is an explanatory diagram showing an editor display and an output example (2) according to the present invention. Here, in FIG.
The document (a) similar to that of No. 3 is read and displayed as an image on the LCD panel 103 of the editor 100. That is, in this case, the operator changes the copy magnification and the recording paper size with respect to FIG.
The state in which 01 is changed is shown. The operator displays the image display 3402 of the read image and the effective image area 34.
From the relationship with the line segment indicating 01, it is easy to confirm on the editor 100 that the entire picture of the original (a) shown in FIG. (See FIG. 34 (a)). Therefore, in this case, as shown in FIG. 34, the image output (b) including the whole picture of the track can be obtained.

FIG. 35 is an explanatory diagram showing a display example in the case where an irregular-sized original according to the present invention is read and displayed on the LCD panel 103 of the editor 100. Generally, when setting an irregular-sized original (an original having a size different from a standard size such as A series or B series) on the contact glass 310, it is difficult to determine the setting position and direction, and therefore, it is like a standard paper. It is difficult to determine the vertical and horizontal lengths (image range). Therefore, in the past, the operator had to repeat trial and error, relying on the intuition, to determine the copy magnification and the recording paper size so that the entire image could be copied onto the recording paper. On the other hand, in the present invention, as shown in FIG. 35, if the image area to be actually copied is displayed on the editor 100, the output result can be easily confirmed on the editor 100 before output. . For example, as shown in FIG. 35A, the area to be copied is the effective image area 3501.
In the case of protrusion, the desired copy can be obtained at one time by making a copy after selecting the copy magnification and the recording paper size as shown in FIG.

[0131]

As described above, according to the image forming apparatus (Claim 1) of the present invention, the original is copied from the copy conditions such as the recording paper size and the copy magnification set by the copy mode setting means. The effective image area is calculated and the effective image area is displayed, and the original image read by the original reading means is displayed so as to be superimposed on the effective image area. The original state and the original state can be visually checked before copying, which improves the workability during copying.

Further, according to the image forming apparatus (Claim 2) of the present invention, the area display means sets the recording sheet size and the copy magnification set by the copy mode setting means.
The lengths in the main scanning direction and the sub-scanning direction are obtained, and the effective image area is displayed in a rectangular area formed by the diagonals of the lengths of the main scanning direction and the sub-scanning direction to consider the recording paper size and the copy magnification. Since the effective image area is made visible to the operator, the relationship between the effective image area and the original image can be confirmed at a glance.

Further, according to the image forming apparatus (Claim 3) of the present invention, the area display means is used to determine the main size based on the recording paper size, the copy magnification and the binding margin amount set by the copy mode setting means. Find the lengths in the scanning and sub-scanning directions,
The effective image area is displayed in a rectangular area formed by a diagonal of the length obtained by subtracting the binding margin from the main scanning direction and the sub-scanning direction, and the recording paper size, the copy magnification, and the binding margin are taken into consideration. Since the operator is allowed to visually recognize the effective image area, the relationship between the effective image area and the original image can be confirmed at a glance. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an editor according to the present invention.

FIG. 2 is an explanatory diagram showing an external configuration of an editor according to the present invention.

FIG. 3 is an explanatory diagram showing a configuration example of a digital copying machine to which the image forming apparatus according to the present invention is applied.

FIG. 4 is an explanatory view showing a plan view of the optical writing section shown in FIG.

5 is an explanatory diagram showing a side surface of the optical writing section shown in FIG.

6 is a circuit diagram showing an electrical equipment control unit in the digital copying machine shown in FIG.

FIG. 7 is a circuit diagram showing an electrical equipment control unit in the digital copying machine shown in FIG.

8 is a block diagram showing an overall configuration of the digital copying machine shown in FIG.

9 is a block diagram showing an image reading operation of the scanner of the digital copying machine shown in FIG.

10 is a block diagram showing details of the image processing unit shown in FIG.

11 is an explanatory diagram showing an output data format of the image process unit shown in FIG.

FIG. 12 is a block diagram showing a memory system according to the present invention.

FIG. 13 is an explanatory diagram showing a flow of an image signal according to the present invention.

14 is a block diagram showing an example of an internal configuration of the memory device shown in FIG.

15 is a block diagram showing an internal configuration of the memory unit shown in FIG.

16 is an explanatory diagram showing a format of image data processed by the memory device shown in FIG.

FIG. 17 is a block diagram showing a configuration example in which a pixel process unit is connected to a memory unit according to the present invention.

18 is a block diagram showing a configuration of the external storage device shown in FIG.

FIG. 19 is a block diagram showing a configuration example that enables recovery when the processing speed of image data compression and expansion according to the present invention is not in time.

FIG. 20 is a block diagram showing a configuration of an application system according to the present invention.

FIG. 21 is an explanatory diagram showing an external configuration of an operation unit according to the present invention.

FIG. 22 is an explanatory diagram showing the configuration of the touch panel detection circuit of the operation unit according to the present invention.

23 is a chart showing a list of combinations of input signals and output signals in the touch panel detection circuit of FIG.

FIG. 24 is a block diagram showing a configuration of an operation unit according to the present invention.

FIG. 25 is an explanatory diagram showing a display example of a liquid crystal display screen.

FIG. 26 is an explanatory diagram showing an example of a screen display by pressing a scaling key.

FIG. 27 is an explanatory diagram showing an example of screen development by pressing the area processing key of the hard keys.

FIG. 28 is an explanatory diagram illustrating a screen display example of a user program mode.

FIG. 29 is an explanatory diagram showing a configuration and a mounting position of an APS sensor.

FIG. 30 is an explanatory diagram showing a timing for determining size data by an APS sensor.

FIG. 31 is a flowchart showing a display process of an effective image area for a copy mode according to the present invention.

FIG. 32 is a flowchart showing details of copy area calculation processing according to the present invention.

FIG. 33 is an explanatory diagram showing an editor display and output example (1) according to the present invention.

FIG. 34 is an explanatory diagram showing an editor display and output example (2) according to the present invention.

FIG. 35 is an explanatory diagram showing a display example when an irregular-sized original according to the present invention is read and displayed on the LCD panel of the editor.

[Explanation of symbols]

 100 editor 103 LCD panel 112 host PPC 305 scanner unit 625 operation unit

Claims (3)

[Claims] 1. An image forming apparatus having copy mode setting means for setting copy conditions such as recording paper size and copy magnification, and document reading means for reading a document image. An area display means is provided for calculating an effective image area of the original to be copied from the copy condition, displaying the effective image area, and displaying the original image read by the original reading means in an overlapping manner with the effective image area. An image forming apparatus characterized by the above. 2. The area display means obtains the lengths in the main scanning direction and the sub scanning direction based on the recording paper size and the copy magnification set by the copy mode setting means, and determines the main scanning direction and the sub scanning direction. The image forming apparatus according to claim 1, wherein the effective image area is displayed in a rectangular area formed diagonally with respect to the length in the scanning direction. 3. The area display means obtains the lengths in the main scanning direction and the sub-scanning direction based on the recording paper size, the copy magnification and the binding margin amount set by the copy mode setting means, and the main scanning direction is calculated. 2. The image forming apparatus according to claim 1, wherein the effective image area is displayed in a rectangular area formed diagonally with a length obtained by subtracting the binding margin amount from the scanning direction and the sub-scanning direction.