JP2009088598A - Image reader and image-forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform desired read-print processing appropriately by preventing wrong operation by a user. <P>SOLUTION: Functions suitable for a double-sided inversion read mode and a double-sided simultaneous read mode are distinguished and stored in a memory section with respect to a plurality of functions achievable by a composite machine. When the double-sided inversion read mode is selected, a control section displays a functional key suitable for the double-sided simultaneous mode on a display section 51 by changing color and prohibits the key concerned from being selected for input. When the double-sided simultaneous read mode is selected, the control section displays a functional key suitable for the double-sided inversion read mode on the display section 51 by changing color and prohibits the key concerned from being selected for input. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image reading apparatus capable of reading both sides of a document, and an image forming apparatus including the image reading apparatus.

  2. Description of the Related Art Conventionally, in an image reading apparatus equipped with an ADF (Automatic Document Feeder) included in a copying machine, a facsimile, or the like, as a method for causing an image reading unit to automatically read the front and back surfaces of a document, After the image is read by the image sensor, a method is widely adopted in which the front and back sides of the original are reversed and the image on the back side is read again by the image sensor. However, in this method, after the image sensor reads the surface of the document, the document is once discharged to the outside and turned upside down, and the image sensor reads the back side of the document again.

  Therefore, as described in Patent Documents 1 to 3, by providing image sensors on both the front and back sides of the document in the document transport path from the document tray, the document can be fed once (without reversing the document). A method of reading both sides of a document almost simultaneously with one pass) is known. In such an image reading apparatus that employs a method of reading both sides of a document almost simultaneously, a reduction optical system image sensor is often used for reading the front side of the document. For this reason, a contact optical system image sensor is often used. However, if the optical configuration of the image sensor that reads the front and back sides of the document is different, there will be a difference in the image quality of the images formed on the front and back sides of the printing paper.

  Therefore, in the image reading apparatus as described above, the user can select a reading method for both sides of the document. In other words, reading the image takes time because the front and back sides of the document are read separately, but in order to make the image quality of the front and back sides of the paper the same, the front and back sides of the document are read by the same image sensor (reduction optical system image sensor). Two-sided reverse reading mode, and two-sided simultaneous reading mode in which the front and back surfaces of a document are read almost simultaneously using two image sensors of a reduction optical system and a contact optical system in order to prioritize shortening of the image reading time. A mode is provided so that the user can arbitrarily select the mode.

In addition, the image reading apparatus as described above and an image forming apparatus including the image reading apparatus are often provided with a large number of functions in order to improve convenience, and function when a user reads and prints a document. You can choose freely. For example, a function for performing image processing suitable for color on image data acquired after reading a color original, a function for performing image processing suitable for photography on image data acquired after reading a photographic original, There is a function to perform image processing that adjusts the outline and sharpens characters and lines. By executing these functions, the image quality of the printed image can be improved. Further, there are a function for collecting and printing images of two read originals on one printing paper, a function for printing with a minimum amount of toner used, and the like.
JP 2000-188665 A JP 2003-43866 A JP 2004-15229 A

  However, among the many functions described above, there are functions that are difficult or inappropriate to implement in the double-sided reverse reading mode and the double-sided simultaneous reading mode, respectively. However, in general, the user does not know which function is appropriate or inappropriate in which reading mode. Therefore, there is a case where an inappropriate function is selected by the user, and in this case, the effect of the function cannot be sufficiently exhibited. Also, as the number of functions increases, it becomes easier for the user to perform an erroneous operation, and it becomes difficult to perform desired document reading and printing processing.

  The present invention has been made to solve the above-described problems, and provides an image reading apparatus and an image forming apparatus that can prevent a user's erroneous operation and can appropriately select a function suitable for each reading mode. It is the purpose.

  An image reading apparatus according to a first aspect of the present invention includes a first reading unit that reads one side of a fed document, a second reading unit that reads the other side of the document, and the first reading unit. A reversing unit for reversing and feeding the original so that the first reading unit can read the other side of the original after reading one side of the original; and a first reading unit, A double-sided reverse reading mode in which one side of the original is read and the first reading unit reads the other side of the original after the original is reversed by the reversing unit, and the first reading unit is one side of the original. Obtained by the mode setting means for setting any one of the double-sided simultaneous reading modes in which the second reading means reads the other side of the document, and the first reading means and the second reading means. image data Among a plurality of functions for performing predetermined processing, a function input means for receiving a selection input of a function desired by a user, the plurality of functions, a function suitable for the double-sided reverse reading mode, Function storage means for distinguishing and storing functions suitable for the reading mode, and selection of a function suitable for the double-sided simultaneous reading mode in the function input means when the double-sided reverse reading mode is set by the mode setting means Selection that prohibits acceptance of input and prohibits acceptance of selection input of a function suitable for the double-sided reverse reading mode when the double-sided simultaneous reading mode is set by the mode setting means And a prohibition control means.

  According to the first aspect of the invention, when the double-sided reverse reading mode is selected, an appropriate function is provided for reading in the double-sided simultaneous reading mode, and when the double-sided simultaneous reading mode is selected, the double-sided reverse reading mode is selected. By prohibiting the selection and input of the function that is appropriate for reading with the user, it is possible to prevent the user from selecting an inappropriate function and failing in reading and printing. Here, the image sensors constituting the first reading unit and the second reading unit may be the same type of image sensor.

  A second aspect of the present invention is the image reading apparatus according to the first aspect, further comprising a hard key that receives an input for selecting the double-side reverse reading mode or the double-sided simultaneous reading mode, and the hard key Each time is pressed, the mode setting means switches to the double-sided reverse reading mode or the double-sided simultaneous reading mode for setting.

  According to the second aspect of the present invention, the user can easily switch the reading mode by operating the hard key.

  A third aspect of the present invention is the image reading apparatus according to the first or second aspect, wherein the function input means is a display means for displaying a predetermined operation screen to a user, and the display means is integrated with the display means. Further comprising: a touch panel that is formed automatically, and a position detection means that detects a touch position when a touch input is made to the touch panel, and further includes a display control means for displaying a key for selecting the function on the display means. The display control means hides a key for selecting a function suitable for the double-sided simultaneous reading mode when the mode setting means sets the double-sided reverse reading mode, or indicates that operation is impossible. When the double-sided simultaneous reading mode is set, a key for selecting a function suitable for the double-sided reverse reading mode is not displayed or a display indicating that operation is not possible It is characterized by performing control to.

  According to the third aspect of the present invention, a key having a function that is not suitable for the set reading mode is displayed so as to be easily viewed by the user, for example, by changing the color, or the like. By making it non-displayed, a user's operation mistake can be prevented and usability can be improved.

  A fourth aspect of the present invention is the image reading apparatus according to any one of the first to third aspects, wherein the first reading unit includes a reduction optical system image sensor, and the second reading unit includes A contact optical system image sensor is provided.

  According to the fourth aspect of the present invention, the same effects as those of the first to third aspects of the invention can be achieved. Although the first reading unit has a reduction optical system image sensor and the second reading unit has a contact optical system image sensor, the reverse may be possible.

  An image forming apparatus according to a fifth aspect of the present invention is based on the image reading apparatus according to any one of the first to fourth aspects, and image data acquired by the first reading unit and the second reading unit. And image forming means for forming an image on a recording medium.

  According to the fifth aspect of the present invention, the image reading apparatus included in the image forming apparatus can enjoy the operational effects of the first to fourth aspects of the invention.

  According to the first aspect of the invention, when the double-sided reverse reading mode is selected, an appropriate function is provided for reading in the double-sided simultaneous reading mode, and when the double-sided simultaneous reading mode is selected, the double-sided reverse reading mode is selected. By prohibiting the selection and input of functions that are appropriate for reading, it is possible to prevent the user from selecting an inappropriate function and failing reading and printing.

  According to the second aspect of the present invention, by arranging the hard key for switching between the double-sided reverse reading mode and the double-sided simultaneous reading mode, the user can easily switch the reading mode by operating the hard key. .

  According to the third aspect of the present invention, a key having a function that is not suitable for the set reading mode is displayed so as to be easily recognized by the user, for example, by changing the color, or the like. By using the display, a user's operation mistake can be prevented, and usability can be improved.

  According to the invention described in claim 4, the same effects as those of the invention described in claims 1 to 3 can be obtained.

  According to the fifth aspect of the present invention, the image reading device provided in the image forming apparatus can enjoy the operational effects of the first to fourth aspects of the invention.

  Hereinafter, an image reading apparatus and an image forming apparatus according to an embodiment of the present invention will be described with reference to the drawings. In the following embodiments, the image reading apparatus and the image forming apparatus according to the present invention will be described as an example in which the image reading apparatus and the image forming apparatus are integrated into a multifunction machine having functions such as a copy, a scanner, a facsimile, and a printer.

  FIG. 1 is a longitudinal sectional view schematically showing the internal configuration of the multifunction machine 1 according to the present embodiment. The multifunction device 1 is roughly composed of an image reading device 2 and a device body 3. The image reading apparatus 2 includes a document feeding unit 21 and a scanner unit (first reading unit) 22. The document feeder 21 realizes ADF, and includes a document tray 211, a sheet feed roller 212, a transport drum 213, a sheet discharge roller 214, and a sheet discharge tray 215. The document tray 211 is a place where the document is placed. The documents placed on the document tray 211 are taken one by one by the paper feed roller 212 and conveyed to the conveyance drum 213. The document that has passed through the transport drum 213 is discharged to a discharge tray 215 by a discharge roller 214.

  The scanner unit 22 optically acquires an image of a document to generate image data, and includes a platen glass 221, a light source 222, a first mirror 223, a second mirror 224, a third mirror 225, and a first carriage 226. A second carriage 227, an imaging lens 228, and a CCD (Charge Coupled Device) 229. In the present embodiment, an example in which the CCD 229 is used as the reduction optical system image sensor of the first reading unit will be described as an example. However, a CMOS (Complementary Metal Oxide Semiconductor) image sensor is used in addition to the CCD. May be.

  The platen glass 221 is a place where a document is placed. The light source 222 and the first mirror 223 are supported by the first carriage 226, and the second mirror 224 and the third mirror 225 are supported by the second carriage 227.

  Here, as an original reading method of the image reading apparatus 2, a flatbed reading mode in which the scanner unit 22 reads an original placed on the platen glass 221 and an ADF reading in which the original is read by the ADF and the original is read in the middle of the conveyance. There is a mode. In the flat bed reading mode, the light source 222 irradiates a document placed on the platen glass 221, and the reflected light for one line in the main scanning direction is reflected in the order of the first mirror 223, the second mirror 224, and the third mirror 225. Then, the light enters the imaging lens 228. The light incident on the imaging lens 228 is imaged on the light receiving surface of the CCD 229. The CCD 229 is a one-dimensional image sensor, and simultaneously processes a document image for one line. When the reading for one line is completed, the first carriage 226 and the second carriage 227 are moved in the direction orthogonal to the main scanning direction (sub-scanning direction, arrow Y direction), and the next line is read.

  In the ADF reading mode, the originals placed on the paper feed tray 211 are taken one by one by the paper feed rollers 212, and the originals are read on the reading window 230 provided in the conveyance path from the conveyance drum 213 to the paper discharge tray 215. When passing, the light source 222 irradiates the document, and the reflected light for one main scanning line is reflected in the order of the first mirror 223, the second mirror 224, and the third mirror 225, and enters the imaging lens 228. The light incident on the imaging lens 228 is imaged on the light receiving surface of the CCD 229. Subsequently, the document is conveyed by the document feeder 21 and the next line is read. In the following description, those not specifically described will be described on the assumption that an original is automatically fed in the ADF reading mode and an image is read.

  Further, the document feeder 21 has a document reversing mechanism (reversing means) including a switching guide 216, a reversing roller 217, and a reversing conveyance path 218. The original whose surface (one side of the original) is read by the first ADF reading is reversed using the original reversing mechanism and re-conveyed, so that the CCD 229 reads the back side (the other side of the original) again. Can be made. This document reversing mechanism operates only when reading both sides, and does not operate when reading one side. After reading the back side during single-sided reading and double-sided reading, the switching guide 216 is switched to the upper side, and the document that has passed through the transport drum 213 is discharged to the discharge tray 215 by the discharge roller 214. After the surface reading at the time of double-sided reading, the switching guide 216 is switched to the lower side, and the document that has passed through the conveying drum 213 is conveyed to the nip portion of the reverse roller 217. Thereafter, the switching guide 216 is switched to the upper side and the reverse roller 217 rotates in the reverse direction, whereby the document is re-conveyed to the conveyance drum 213 via the reverse conveyance path 218. Hereinafter, a mode in which both sides of a document are read using the document reversing mechanism is referred to as a double-sided reversal reading mode or a high image quality mode.

  Further, in the ADF reading mode, the image reading apparatus 2 according to the present embodiment causes the CCD 229 to read the surface of the original while the original is being conveyed as described above, and at the same time, CIS (second reading means). It is possible to read the back side of the original by H.231. That is, the document fed from the sheet feed tray 211 is read by the CCD 229 when passing through the reading window 230, and the back side is read when passing through the CIS 231. By using the CCD 229 and the CIS 231 in this way, it is possible to read both sides of a document with one pass. Hereinafter, a mode in which both sides of a document are read using the CCD 229 and the CIS 231 is referred to as a double-sided simultaneous reading mode or a high-speed mode.

  Here, the double-sided reverse reading mode (high image quality mode) and the double-sided simultaneous reading mode (high-speed mode) will be described. In the double-sided reverse reading mode, since both sides of the original are read by the same image sensor (CCD 229), there is no difference in image quality between the read front and back images. However, in the double-sided simultaneous reading mode, since the front side of the document is read by different image sensors such as the CCD 229 and the back side is CIS 231, if double-sided printing is performed based on the image data acquired by each image sensor, There will be a difference in image quality. In particular, when color printing is performed, the difference in image quality between the read front and back surfaces appears remarkably. The cause is that the scanner unit 22 uses a white fluorescent lamp such as a cold cathode fluorescent tube as the light source 222, while the CIS 231 uses a three-color LED or the like (not shown) as the light source. Due to the difference in the light source, it is known that image reading by the scanner unit 22 is superior in color reproducibility. In addition to the difference in spectral distribution of these light sources, the CCD 229 is configured as an image sensor with a plurality of light receiving elements formed on a single chip, whereas in the CIS 231 a plurality of solid state imaging elements are connected. Since it is configured as an image sensor, the sensitivity varies between the solid-state imaging devices, and this is considered to cause a difference in image quality.

  Therefore, in the MFP 1 according to the present embodiment, when performing double-sided reading of a document using the ADF, the user selects either the high image quality mode (double-sided reverse reading mode) or the high-speed mode (double-sided simultaneous reading mode). can do. In other words, high-quality mode (double-sided reverse reading mode) is used to match the image quality of double-sided printed images, and high-speed mode (priority is given to shortening the reading time even if there is a difference in image quality of double-sided printed images) The user can select the mode according to the situation.

  In the present embodiment, the scanner unit 22 corresponds to the first reading unit, and the CIS 231 corresponds to the second reading unit. However, the configuration may be reversed. Furthermore, the first reading unit and the second reading unit may be configured by the same optical system image sensor.

  Returning to the description of the configuration of the multifunction machine 1. The multifunction device 1 includes an apparatus main body 3 and a stack tray 6 disposed on the left side of the apparatus main body 3. The apparatus main body 3 includes a plurality of paper feed cassettes 461, a paper feed roller 462 that feeds paper (recording medium) one by one from the paper feed cassette 461 and transports the paper to the recording unit (image forming unit) 40, and a paper feed cassette 461. And a recording unit 40 that forms an image on the sheet conveyed from the printer. Further, a manual feed tray 471 is provided. From this manual feed tray 471, paper of a size that is not stored in any paper feed cassette, paper on which an image is already formed on one side (back paper), or an OHP sheet is provided. An arbitrary recording medium can be placed, and is fed into the apparatus main body 3 one by one by a paper feed roller 472.

  The recording unit 40 is based on a charge eliminating device 421 that removes residual charges from the surface of the photosensitive drum 43, a charging device 422 that charges the surface of the photosensitive drum 43 after charge removal, and image data acquired by the scanner unit 22. The laser beam is output to expose the surface of the photosensitive drum 43, and an exposure device 423 that forms an electrostatic latent image on the surface of the photosensitive drum 43, and on the photosensitive drum 43 based on the electrostatic latent image, Developing devices 44C, 44M, 44Y, and 44K that form toner images of each color of cyan (C), magenta (M), yellow (Y), and black (K), and toner images of each color that are formed on the photosensitive drum 43 A transfer drum 49 on which toner images are transferred, a transfer device 41 that transfers the toner image on the transfer drum 49 to a sheet, and a sheet on which the toner image has been transferred is heated to set the toner image on the sheet. And a fixing device 45 for. Note that toner is supplied to each color of cyan, magenta, yellow, and black from a toner supply container (toner cartridge) (not shown). Further, conveyance rollers 463 and 464 that convey the sheet that has passed through the recording unit 40 to the stack tray 6 or the discharge tray 48 are provided.

  When images are formed on both sides of a sheet, after the recording unit 40 forms an image on one side of the sheet, the sheet is nipped by a conveyance roller 463 on the discharge tray 48 side. In this state, the transport roller 463 is rotated in the reverse direction to switch back the paper, and the paper is sent to the paper transport path L to be transported again to the upstream area of the recording unit 40. The recording unit 40 forms an image on the other surface. Then, the paper is discharged to the stack tray 6 or the discharge tray 48.

  Further, in front of the apparatus main body 3, an operation unit 5 having a display unit through which a user can visually recognize an operation screen and various messages, and operation buttons for inputting various operation commands is provided. 2 and 3 are examples of front views of the operation unit 5. The operation unit 5 includes a display unit (display unit) 51, a touch panel (function input unit, position detection unit) 52, a numeric key group 53, various operation buttons 54 to 57, a function selection button 58, a double-sided simultaneous button 59, and the like. The display unit 51 is configured by an LCD (Liquid Crystal Display), an ELD (Electronic Luminescent Display), or the like, and displays selection screens such as paper size selection, magnification selection, and density selection. The display unit 51 is formed integrally with the touch panel 52. The touch panel 52 detects a touch position and outputs a detection signal to a control unit described later when a touch operation is performed by the user.

  The numeric key group 53 is used, for example, for the user to input the number of copies during the copy function operation of the multifunction device 1 and the destination telephone number or the like during the facsimile function operation. The power saving button 54 is a button for setting the multifunction machine 1 in a power saving (low power) mode. The start button 55 is a button for starting a copy operation or a scanner operation, and the stop / clear button 56 is a button for stopping the copy operation or the scanner operation or canceling an input operation. The reset button 57 is a button for setting the display of the display unit 51 and various settings to an initial state or a standard operation state. The function selection button 58 is a button for setting a copy function, a printer function, a scanner function, and a facsimile function.

  The double-sided simultaneous button 59 is a button for switching the mode setting of the double-sided simultaneous reading mode. The double-sided simultaneous button 59 incorporates a light emitting element such as an LED, and the light emission state of the LED is switched by turning on / off the double-sided simultaneous button 59. In the off state, the built-in light emitting element is not lit as shown in FIG. 2, and the double-sided reverse reading mode is set as the reading mode. When the user depresses (turns on) the double-sided simultaneous button 59, the built-in light emitting element is turned on as shown in FIG. 3, and the double-sided simultaneous reading mode is set as the reading mode. By arranging a hard key for switching between the double-sided reverse reading mode and the double-sided simultaneous reading mode like the double-sided simultaneous button 59, the user can easily switch the reading mode by operating the hard key.

  FIG. 4 is a block diagram showing an electrical configuration of the multifunction machine 1. The MFP 1 includes a document feeder 21, a scanner unit 22, a CIS 231, an operation unit 5, a control unit (mode setting unit, selection prohibition control unit, display control unit) 61, an image processing unit 64, a recording unit 40, and a memory unit. (Function storage means) 65 and a communication unit 66 are provided. The same components as those described in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The document feeder 21 automatically captures a document placed on the document tray 211 and conveys the document so that it can be read by the CCD 229 or the CIS 231. The document feeder 21 implements ADF. The scanner unit 22 and the CIS 231 optically acquire an image of a document and generate image data.

  The operation unit 5 receives operation inputs related to a copy function, a scanner function, a facsimile function, a printer function, and the like. Then, an operation signal corresponding to the operation input is output to the control unit 61. The operation unit 5 corresponds to the touch panel 52, the numeric key group 53, the operation buttons 54 to 57, the function selection button 58, the double-sided simultaneous button 59 and the like shown in FIG. 2, and the operation unit 5 further includes a display unit 51. When the user presses down on the operation key displayed on the display unit 51, a position where the touch panel 52 configured integrally with the display unit 51 is pressed is detected, and position information is output to the control unit 61. Then, processing corresponding to the key pressed by the control unit 61 is performed.

  The control unit 61 is configured by a CPU or the like, and executes processing based on a predetermined program in accordance with an input instruction signal or the like, and outputs an instruction signal to each functional unit, data transfer, or the like to perform the multifunction machine 1. Is to control the overall. Specifically, the control unit 61 causes the display unit 51 to display a key for the user to select a desired function from a plurality of functions that can be executed by the multifunction device 1. When the function key is pressed by the user, position information is output from the touch panel 52, and the control unit 61 identifies the pressed key based on the position information. Further, the control unit 61 sets a reading mode based on ON / OFF of the double-sided simultaneous button 59, and controls the document feeding unit 21, the scanner unit 22, and the CIS 231 in response to a copy start instruction operation by pressing the start button 55. Control the document to be read. Then, predetermined processing corresponding to the selected function is performed on the image data acquired by the scanner unit 22 and the CIS unit 231.

  Here, examples of functions provided in the multifunction machine 1 include, for example, a color mode, a photo mode, a consolidated copy, a toner saving copy, and a sharpness adjustment function. The color mode is a function in which an image processing unit 64 (to be described later) performs image processing suitable for color on image data acquired after reading a color original, and the photo mode is image data acquired after reading a photographic original. The image processing unit 64 performs image processing suitable for photographs. Aggregated copy is a function for performing reduction processing on image data for two originals so that the image processing unit 64 can aggregate and copy the image data on a single print sheet, and toner saving copy is used for the recording unit 40. This is a function that makes copying with a minimum amount of toner. The sharpness adjustment function is a function for adjusting the outline of an image, and is a function for clearly copying blurred characters and lines.

  Further, based on a mode-by-mode function prohibition table 651 stored in the memory unit 65, which will be described later, the control unit 61 determines that the double-sided simultaneous button 59 is off (that is, when the double-sided reverse reading mode is selected). When the function key suitable for the simultaneous reading mode and the double-sided simultaneous button 59 are on (that is, when the double-sided simultaneous reading mode is selected), the function key selection input suitable for the double-sided reverse reading mode is not accepted. The color is changed so that the user can visually recognize that it cannot be selected, and is displayed on the display unit 51. In this way, by prohibiting selection input of functions that are not appropriate according to the reading mode, it is possible to prevent user operation errors. Furthermore, since the user can visually recognize the function keys that cannot be selected and input, it is possible to prevent the user from selecting an inappropriate function and failing reading / printing.

  The image processing unit 64 performs various image processing relating to image data. For example, the image processing unit 64 performs correction processing such as level correction and gamma correction on image data acquired by the scanner unit 22 and the CIS 231 and image data transferred from an external device via the communication unit 66, image Image processing such as data compression or expansion processing, enlargement or reduction processing is performed. Further, predetermined image processing is performed on the image data in accordance with the function selected by the user.

  The recording unit 40 prints an image based on image data obtained by the scanner unit 22 or image data transferred from an external device via the communication unit 66 in black and white or color on a predetermined sheet.

  The memory unit 65 stores various programs, data, and the like necessary for the control unit 61 to control the entire multifunction device 1 and is configured by, for example, a semiconductor memory. The memory unit 65 stores at least a mode-specific function prohibition table 651. FIG. 5 shows the data structure of the mode-specific function prohibition table 651. In the function prohibition table 651 for each mode, among the functions of the multi-function device 1, functions suitable for both the double-sided reverse reading mode and the double-sided simultaneous reading mode are distinguished and stored. For example, there are a color mode, a photo mode, and a sharpness function as functions suitable for the double-sided reverse reading mode. When these modes and functions are selected by the user, the original is often a color original or a photographic original, and the user often desires a high-quality copy image. Therefore, it is more effective that the original is read in the double-sided reverse reading mode than in the double-sided simultaneous reading mode.

  Functions suitable for the double-sided simultaneous reading mode include a character mode, collective copy, and toner saving copy. The character mode is a function that is selected when a character-only document is copied, but in this case, there are few cases that require high-quality copying. Therefore, the character mode is inferior in image quality to the image read in the double-sided reverse reading mode, but the reading in the double-sided simultaneous reading mode that can shorten the reading time is more suitable. Aggregate copy is a function that aggregates and copies two or more originals into one sheet. However, since the read image is reduced and copied, it is difficult to understand the effect even if the image quality of the copy is improved. Therefore, reading in the double-sided simultaneous reading mode that can shorten the reading time is more suitable. Furthermore, since toner-saving copying is performed while suppressing the amount of toner consumed, the image is printed slightly thinly and is often selected for trial printing, and there are few cases where high image quality is required. . Therefore, reading in the double-sided simultaneous reading mode is more suitable.

  The contents stored in the mode-specific function prohibition table 651 may be set in advance at the time of factory shipment of the multifunction device 1 and stored in the memory unit 65, or may be arbitrarily settable by the user. .

  The communication unit 66 uses a network interface to transmit / receive various data to / from an external device such as a computer or a facsimile connected via a network.

  6 to 9 show screen examples of the display unit 51, and FIG. 10 is a flowchart showing the flow of copy processing. The flow of copy printing processing in this embodiment will be described with reference to FIGS.

  When the copy function of the multifunction device 1 is selected and the double-sided simultaneous button 59 is off, the control unit 61 causes the display unit 51 to display a standard screen as shown in FIG. On the standard screen, color mode key 111, character mode key 112, photo mode key 113, and the like are displayed in addition to operation keys for paper size selection, magnification selection, density selection, and the like. In addition, the high-quality mode key 101 and the high-speed mode key 102 are displayed. In addition to turning on / off the double-sided simultaneous button 59, the double-sided simultaneous reading mode is pressed by pressing the high-quality mode key 101, and the double-sided inversion reading is pressed A mode can be selected.

  When the double-sided simultaneous button 59 is off (step S11 in FIG. 10; off), that is, the lighting state indicated by the double-sided simultaneous button 59 is as shown in FIG. Reads a function suitable for the double-sided simultaneous reading mode from the mode-specific function prohibition table 651, prohibits acceptance of selection input of a key corresponding to the function, and causes the display unit 51 to display the key lightly. In addition, when the display part 51 is a color screen, it is good also as changing a color and displaying or not displaying. In the present embodiment, the character mode key 112 is displayed lightly. At the same time, the control unit 61 also displays the high-speed mode key 102 in a thin color, and prohibits acceptance of the selection input of this key.

  Further, when the function list key 121 is pressed by the user, the control unit 61 causes the display unit 51 to display a function list screen as shown in FIG. On the function list screen, keys corresponding to various functions that can be realized by the multifunction device 1 are displayed. Also on the function list screen, the control unit 61 displays a light key corresponding to a function suitable for the double-sided simultaneous reading mode, and prohibits acceptance of selection input of the key. In this embodiment, the collective copy key 131 and the toner saving copy key 132 are displayed lightly.

  On the other hand, when the double-sided simultaneous button 59 is on (step S11; on), that is, when the double-sided simultaneous button 59 is lit as shown in FIG. A standard screen as shown in FIG. 8 is displayed on the display unit 51, and a function suitable for the double-sided reverse reading mode is read from the mode-specific function prohibition table 651, and a key corresponding to the function is displayed lightly. Then, the control unit 61 prohibits acceptance of a key selection input corresponding to a function suitable for the double-sided reverse reading mode. In the present embodiment, the color mode key 111 and the photo mode key 113 are displayed lightly. At the same time, the control unit 61 displays the high image quality mode key 101 in a thin color, and prohibits acceptance of the selection input of this key.

  Further, when the function list key 121 is pressed by the user, the control unit 61 displays a function list screen as shown in FIG. 9 on the display unit 51, and the function list screen also has a function suitable for the double-sided reverse reading mode. The corresponding key is displayed in a thin color, and the selection input of the key is prohibited. In the present embodiment, the sharpness adjustment key 133 is displayed lightly.

  By pressing the double-sided simultaneous button 59, the reading mode is switched, and the display of each function key is also switched at the same time. For example, when the control unit 61 displays the standard screen shown in FIG. 6 on the display unit 51 with the double-sided simultaneous button 59 turned off, when the simultaneous double-sided button 59 is pressed by the user, the control unit 61 makes the reading mode Is switched to the double-side reverse reading mode, and at the same time, the display of the display unit 51 is switched to the standard screen shown in FIG. That is, the character mode key 112 is displayed lightly in the double-sided reverse reading mode, but when the double-sided simultaneous reading mode is switched by pressing the double-sided simultaneous button 59, the character mode key 112 is switched to a selectable display. Instead, the color mode key 111 and the photo mode key 113 are lightly displayed indicating that selection is not possible.

  Subsequently, when the function key is pressed by the user (step S14) and the start button 55 is pressed (step S15; YES), the control unit 61 causes the document feeding unit 21 to take in the document and is set. According to the reading mode, the scanner unit 22 and the CIS 231 are caused to read the image of the document (step S16). Then, the image processing unit 64 performs image processing corresponding to the selected function key on the image data acquired by the scanner unit 22 and the CIS 231 (step S17), and a recording unit based on the image data after the image processing. 40 forms an image on the printing paper (step S18).

  As described above, an appropriate function according to the reading mode is set in advance, and when the double-sided reverse reading mode is selected, the function key suitable for reading in the double-sided simultaneous reading mode, the double-sided simultaneous reading mode When is selected, prohibiting the user from selecting an appropriate function for reading in duplex reversal reading mode prevents reading and printing from failing. it can. Furthermore, by making the color of the non-selectable keys displayed or hidden so that the user can easily recognize them, it is possible to prevent user operation errors and improve usability.

FIG. 2 is a longitudinal sectional view schematically showing the internal configuration of the multifunction machine. The front view of an operation part. The front view of an operation part. FIG. 2 is a block diagram illustrating an electrical configuration of the multifunction machine. The figure which shows the data structure of the function prohibition table according to mode. Screen example of the display unit. Screen example of the display unit. Screen example of the display unit. Screen example of the display unit. The flowchart which showed the flow of the copy process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multifunctional device 3 Apparatus main body 2 Image reading apparatus 5 Operation part 21 Document feeding part 51 Display part 211 Document tray 52 Touch panel 212 Feeding roller 53 Numeric key group 213 Transport drum 61 Control part 214 Paper discharge roller 611 ACS part 215 Paper discharge Tray 64 Image processing unit 216 Switching guide 40 Recording unit 217 Reverse roller 66 Communication unit 218 Reverse conveyance path 22 Scanner unit 222 Light source 228 Imaging lens 229 CCD
230 Reading window 231 CIS

Claims (5)

First reading means for reading one side of a fed document;
Second reading means for reading the other side of the document;
A reversing unit for reversing and feeding the original so that the first reading unit can read the other side of the original after the first reading of the first side of the original is finished;
A double-sided reverse reading mode in which the first reading unit reads one side of the document and the first reading unit reads the other side of the document after the document is reversed by the reversing unit; Mode setting means for reading one side of the original and setting either one of the double-sided simultaneous reading modes in which the second reading means reads the other side of the original;
A function input means for receiving selection input of a function desired by a user among a plurality of functions for performing predetermined processing on the image data acquired by the first reading means and the second reading means;
A function storage unit that stores the plurality of functions separately in a function suitable for the double-sided reverse reading mode and a function suitable for the double-sided simultaneous reading mode;
When the double-sided reverse reading mode is set by the mode setting unit, the function input unit is prohibited from accepting selection of a function suitable for the double-sided simultaneous reading mode, and the mode setting unit sets the double-sided simultaneous reading mode. Selection prohibition control means for performing control to prohibit the function input means from accepting selection input of a function suitable for the double-sided reverse reading mode,
An image reading apparatus comprising:   A hard key for receiving an input for selecting the double-sided reverse reading mode or the double-sided simultaneous reading mode is further provided, and each time the hard key is pressed, the mode setting unit is configured to display the double-sided reverse reading mode or the double-sided simultaneous reading mode. The image reading apparatus according to claim 1, wherein the image reading apparatus is set by switching to The function input means includes a display means for displaying a predetermined operation screen for a user, a touch panel formed integrally with the display means, and a position detection for detecting a touch position when a touch input is made to the touch panel. Having means,
A display control means for causing the display means to display a key for selecting the function;
The display control means hides a key for selecting a function suitable for the double-sided simultaneous reading mode when the mode setting means sets the double-sided reverse reading mode, or indicates that the operation is impossible. When the double-sided simultaneous reading mode is set, a key for selecting a function suitable for the double-sided reverse reading mode is hidden or displayed to indicate that operation is impossible. The image reading apparatus according to 1 or 2.   The image reading apparatus according to claim 1, wherein the first reading unit includes a reduction optical system image sensor, and the second reading unit includes a contact optical system image sensor. An image reading apparatus according to any one of claims 1 to 4,
Image forming means for forming an image on a recording medium based on image data acquired by the first reading means and the second reading means;
An image forming apparatus.