JP6319131B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus including a paper feed cassette that stores paper.

  An image forming apparatus that is a printer, a multifunction printer, a multifunction peripheral device, or a multifunction peripheral (MFP) develops an electrostatic latent image of a document formed on a photoreceptor with toner supplied from a developing device. Then, the toner image is transferred to a sheet taken out from the paper feed cassette and fixed, and the sheet on which the toner image is transferred is discharged from the image forming apparatus. In the process of printing the document on the paper in this way, the paper is taken out from the paper cassette, so that the user can replenish the paper cassette when the paper becomes low or runs out, or another size. When printing with different types of paper, the paper in the paper cassette is replaced with another paper. However, when a user prints on a different size or type of paper, if the printing is performed with the paper size or type set as before, a miscopy occurs due to supplying the wrong paper. . For this reason, for example, in the image forming apparatus disclosed in Patent Document 1, paper information such as paper quality, thickness, and size of the image recording paper stored in the paper feed cassette is stored, and the user operates the paper feed cassette. When a predetermined condition is established, such as when it is performed, the stored paper information is displayed, and if the paper information is set or changed, the paper information stored by the user is rewritten to prevent miscopying. .

JP 2002-278377 A

  However, in the image forming apparatus disclosed in Patent Document 1, when the user performs an operation to open / close the paper feed cassette to check whether the paper in the paper feed cassette is low, or when the paper is replenished or replaced Even when an operation for opening / closing another sheet cassette is mistakenly performed, the sheet information is displayed, which is troublesome.

  The present invention has been made in view of such a situation, and an object thereof is to provide an image forming apparatus capable of solving the above-described problems.

The image forming apparatus of the present invention is an image forming apparatus including a plurality of paper feed cassettes, and corresponds to the paper feed cassette open detection means for detecting that the paper feed cassette is opened, and the paper feed cassette. Paper information screen processing means for displaying a paper information setting screen and paper pattern change detection upon detecting that the paper pattern of the paper stored in the paper cassette has changed when the opened paper cassette is closed A paper pattern change detecting means for outputting a notification to the paper information screen processing means, wherein the paper information screen processing means corresponds to the paper information corresponding to the paper feed cassette when the paper pattern change detection notification is input. to display the setting screen, the paper information screen processing unit, the paper information corresponding to the paper feed cassette has not been opened and closed other than the paper feed cassette when the paper fingerprint change detection notification is not input It is characterized by displaying a示画surface.
The paper pattern change detecting means of the image forming apparatus of the present invention detects the change amount of the paper pattern when detecting that the paper pattern of the paper has changed, and outputs the change amount to the paper information screen processing means. The paper information screen processing means receives the paper print change detection notification and the change amount of the paper print from the paper print change detection means, and when the change amount is greater than or equal to a preset change amount, A paper information setting screen is displayed, and the paper information setting screen is not displayed when the change amount is less than a preset change amount.
Further, the sheet information display screen of the image forming apparatus according to the present invention displays sheet cassette information of a plurality of sheet cassettes.

  The present invention determines whether it is necessary to display a screen for setting the paper size and type (hereinafter referred to as “paper information setting screen”), and displays the paper information setting screen when it is determined to be necessary. An image forming apparatus is provided.

1 is an external perspective view of an image forming apparatus according to an embodiment of the present invention. 1 is a schematic cross-sectional view showing an internal configuration of an image forming apparatus according to an embodiment of the present invention. FIG. 2 is a control block diagram illustrating a functional configuration of the image forming apparatus according to the embodiment of the present invention. It is a screen format figure of the paper information setting screen and paper information display screen which concern on embodiment of this invention. It is a flowchart which shows the flow of the paper information screen process which concerns on embodiment of this invention.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the drawings. An image forming apparatus 1 according to the embodiment is an image forming apparatus that forms an image, such as a printer, a multifunction printer, a multifunction peripheral device, or a multifunction peripheral. Referring to FIG. 1, a document reading unit 2 and a document feeding unit 3, a main body 4, and an operation unit 5. The document reading unit 2 is disposed on the top of the main body unit 4, and the document feeding unit 3 is disposed on the top of the document reading unit 2.

  On the front side of the image forming apparatus 1, an operation unit 5 for setting and operating instructions of the image forming apparatus 1 is disposed. The operation unit 5 is provided with a liquid crystal display unit 51 and operation buttons 52. The user operates the operation unit 5 to input an instruction, thereby performing various settings of the image forming apparatus 1 and executing various functions such as image formation. The liquid crystal display unit 51 displays the state of the image forming apparatus 1, displays the image forming status and the number of copies, and can be used as a touch panel to perform various settings such as functions such as double-sided printing and black-and-white reversal, magnification setting, and density setting. It has become. The operation buttons 52 include a start button for instructing start of image formation, a stop / clear button for instructing to stop image formation, a reset button used when various settings of the image forming apparatus 1 are set to a default state, a numeric keypad, and the like. Is provided.

  Referring to FIG. 2, the document reading unit 2 includes a scanner 21, a platen glass 22, and a document reading slit 23. The scanner 21 includes a light source 24 using an LED (Light Emitting Diode) and a light receiving unit 25 including a CCD (Charge Coupled Device) line sensor, a CMOS (Complementary Metal Oxide Semiconductor) line sensor, and the like. The unit 3 is configured to be movable in the conveyance direction of the document MS (manuscript). The document reading slit 23 is a slit formed in a direction orthogonal to the conveyance direction of the document MS by the document feeding unit 3.

  The document feeding unit 3 includes a document placement unit 31, a document discharge unit 32, and a document transport mechanism 33. The document MS set on the document placement unit 31 is sequentially fed out one by one by the document transport mechanism 33, transported to a position facing the document reading slit 23, and then discharged to the document discharge unit 32. The document feeding unit 3 and the document reading unit 2 are connected to each other by a hinge mechanism on the back side of the image forming apparatus 1, and the document feeding unit 3 functions as a platen cover that opens and closes the upper surface of the platen glass 22. . By opening the document feeder 3 upward, the upper surface of the platen glass 22 is opened, and the document MS can be set on the platen glass 22.

  When reading of the document MS is instructed by the operation button 52 of the operation unit 5 in a state where the document MS is not set on the document placement unit 31 or in an opened state where the document feeding unit 3 (platen cover) is opened. A document MS set on the platen glass 22 is read. When reading the document MS placed on the platen glass 22, the scanner 21 is moved to a position facing the platen glass 22, and the document MS set on the platen glass 22 is moved in the sub-scanning direction orthogonal to the main scanning direction. The image data is obtained by scanning while scanning from the sub-scanning direction reference line B, and the obtained image data is output to the control unit 7 (FIG. 3) in the main body unit 4.

  When reading of the document MS is instructed by the operation button 52 of the operation unit 5 in a state where the document MS is set on the document placement unit 31, the document MS conveyed by the document feeding unit 3 is read. The document MS is set on the document placement unit 31 with the front surface (surface from which a document image is read) facing up. Then, the document MS set on the document placement unit 31 is conveyed from the left side by the document feeding unit 3, and the surface of the document MS is guided to a position facing the document reading slit 23. Further, when reading the document MS conveyed by the document feeding unit 3, the scanner 21 is moved to a position facing the document reading slit 23 and is synchronized with the conveying operation by the document feeding unit 3 via the document reading slit 23. Then, the original MS is read to acquire image data, and the acquired image data is output to the control unit 7 (FIG. 3) in the main body unit 4.

The main body 4 includes a recording unit 6 and also includes a paper feed cassette 41a, a paper feed cassette 41b, a paper feed cassette 41c, a paper feed cassette roller 42a, a paper feed cassette roller 42b, and a paper feed cassette roller 42c. , A sheet conveyance path 43, a registration roller 44, and a discharge roller 45 are provided.
The paper feed cassette 41 a is a paper feed cassette that stores a plurality of paper sheets P, and the paper feed cassette roller 42 a feeds the paper P from the paper feed cassette 41 a to the paper transport path 43 one by one. The paper P fed out to the paper transport path 43 by the paper feed cassette roller 42 a is transported to the recording unit 6 by the registration roller 44. The paper feed cassette 41b is a paper feed cassette that stores a plurality of sheets of paper P in the same manner as the paper feed cassette 41a. The paper feed cassette roller 42b is configured to feed the paper P from the paper feed cassette 41b one by one. To go out. The paper P fed to the paper transport path 43 by the paper feed cassette roller 42 b is transported to the recording unit 6 by the registration roller 44. The paper feed cassette 41c is a paper feed cassette that stores a plurality of sheets of paper P in the same manner as the paper feed cassette 41a, and the paper feed cassette roller 42c is a paper transport path 43 for paper P one by one from the paper feed cassette 41c. To go out. The paper P fed to the paper transport path 43 by the paper feed cassette roller 42c is transported to the recording unit 6 by the registration roller 44. The registration roller 44 conveys the paper P so that the leading edge of the paper P supplied from the paper feeding cassette 41a, the paper feeding cassette 41b, and the paper feeding cassette 41c is aligned with the leading edge of the image read from the document.
The paper P on which recording has been performed by the recording unit 6 is discharged by a discharge roller 45 into a discharge space 46 formed between the document reading unit 2 and the main body unit 4. As described above, the paper feed cassette roller 42 a, the paper feed cassette roller 42 b, the paper feed cassette roller 42 c, the registration roller 44, and the discharge roller 45 function as a paper P transport unit.

In addition, an open / close sensor (not shown) and a paper pattern sensor (not shown) are attached to each of the paper feed cassette 41a, the paper feed cassette 41b, and the paper feed cassette 41c.
Each open / close sensor includes an “upper stage” in which the opened sheet cassette 41a, sheet cassette 41b or sheet cassette 41c is installed when the sheet cassette 41a, sheet cassette 41b or sheet cassette 41c is opened. , An open detection notification in which the positions of “middle stage” and “lower stage” are set is output to the control unit 7 (FIG. 3) in the main body unit 4. The open / close sensor outputs a close detection notification to the control unit 7 (FIG. 3) in the main body 4 when the paper feed cassette 41a, the paper feed cassette 41b, or the paper feed cassette 41c is closed.
Each paper pattern change detection sensor is housed in the paper feed cassette 41a, paper feed cassette 41b or paper feed cassette 41c when the opened paper feed cassette 41a, paper feed cassette 41b or paper feed cassette 41c is closed. When it is detected that the paper pattern has changed due to the replenishment or replacement of the paper P being supplied, a paper pattern change detection notification is output to the control unit 7 (FIG. 3) in the main body unit 4. Paper crests include paper crests that differ depending on the paper type, specifically, paper quality, color, size, etc., such as flat paper, rough paper, transparent paper, vellum paper, label paper, and recycled paper. In addition, in the case of paper replenishment, paper replenishment is also assumed to have changed.

  The recording unit 6 includes a photosensitive drum 61, a charging unit 62, an exposure unit 63, an image forming unit 64, a transfer unit 65, a fixing unit 66, and a cleaning unit 67. The exposure unit 63 is an optical unit including a laser device, a mirror, and the like. The exposure unit 63 outputs a laser beam based on image data to the photosensitive drum 61 uniformly charged by the charging unit 62 and exposes the photosensitive drum 61. An electrostatic latent image is formed on the surface of the drum 61. The image forming unit 64 is a developing unit that develops the electrostatic latent image formed on the photosensitive drum 61 using toner, and forms a toner image based on the electrostatic latent image on the photosensitive drum 61. The transfer unit 65 transfers the toner image formed on the photosensitive drum 61 by the image forming unit 64 to the paper P. The fixing unit 66 heats the paper P on which the toner image is transferred by the transfer unit 65 to fix the toner image on the paper P or the paper P. The toner remaining on the photosensitive drum 61 is removed by the cleaning unit 67.

  FIG. 3 is a control block diagram illustrating a schematic control configuration of the image forming apparatus 1. The document reading unit 2, the document feeding unit 3, the transport unit (the paper feed cassette roller 42 a, the paper feed cassette roller 42 b, the paper feed cassette roller 42 c, the registration roller 44, the discharge roller 45), the operation unit 5, and the recording unit 6. The storage unit 8 and the communication unit 9 are connected to the control unit 7 and controlled in operation by the control unit 7. The control unit 7 includes a paper information screen processing unit 71.

The control unit 7 is an information processing unit such as a microcomputer including a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The ROM stores a control program for controlling the operation of the image forming apparatus 1. The control unit 7 reads out a control program stored in the ROM and develops the control program in the RAM, thereby controlling the entire apparatus according to predetermined instruction information input from the operation unit 5.
The paper information screen processing unit 71 determines whether or not the display of the paper information setting screen is necessary, and displays the paper information setting screen on the liquid crystal display unit 51 when it is determined that it is necessary. Details of the processing of the paper information screen processing unit 71 will be described later.

The storage unit 8 is a storage unit such as a semiconductor memory or an HDD (Hard Disk Drive), and stores image data of the document MS read by the scanner 21 as well as various management information and setting information. .
The storage unit 8 also stores information such as the position and name of each of the paper feed cassette 41a, paper feed cassette 41b, and paper feed cassette 41c, and the size and type of stored paper (hereinafter referred to as “paper feed cassette information”). Is stored).

  The communication unit 9 has a function of transmitting / receiving various data to / from a peripheral device 11 such as a personal computer and another image forming apparatus 1a via a network 10 such as a LAN. The communication unit 9 is configured to be connectable to the Internet 13 via the network 10 and the router 12. The communication unit 9 has a function of transmitting / receiving various data to / from various communication devices connected to the Internet 13.

  Next, a paper information setting screen 81 shown in FIG. 4A displayed by the paper information screen processing unit 71 of the image forming apparatus 1 and a screen for displaying the paper size and type shown in FIG. The screen format of “paper information display screen” 82 will be described.

In the paper information setting screen 81, the paper information screen processing unit 71 detects the opening / closing of any of the paper feed cassette 41a, the paper feed cassette 41b, or the paper feed cassette 41c (hereinafter referred to as “paper feed cassette”). 6 is a screen displayed when a paper pattern change detection notification is input from a paper pattern change detection sensor attached to the. On the paper information setting screen 81, as shown in FIG. 4A, a “paper cassette name” display area 81a, a “paper size” input area 81b, a “paper type” display area 81c, and a “paper type selection” operation area. 81d and an “OK” button 81e are provided.
The “paper cassette name” display area 81a is an area for displaying the name of the paper cassette at the position set in the open detection notification. The name of the paper feed cassette is extracted from the paper feed cassette information in the storage unit 8.
The “paper size” input area 81b is an area for inputting the size of the paper stored in the paper cassette displayed in the “paper cassette name” display area 81a.
The “paper type” display area 81c is an area for displaying the paper type selected by the user from the “paper type selection” operation area 81d.
The “paper type selection” operation area 81d is an operation area for selecting the type of paper stored in the paper feed cassette displayed in the “paper feed cassette name” display area 81a. The paper type selected by the user from the “paper type selection” operation area 81d is displayed in the “paper type” display area 81c.
The “OK” button 81e displays the paper size input from the “paper size” input area 81b and the paper type selected from the “paper type selection” operation area 81d in the “paper cassette name” display area 81a. This button stores the paper cassette information stored in the storage unit 8 corresponding to the paper cassette name and deletes the paper information setting screen 81.

In the paper information display screen 82, the paper information screen processing unit 71 detects the opening and closing of the paper cassette, and no paper pattern change detection notification is input from the paper pattern change detection sensor attached to the opened and closed paper cassette. It is a screen that is sometimes displayed. On the paper information display screen 82, as shown in FIG. 4B, a “paper cassette name” display area 82a1, a “paper cassette name” display area 82a2, a “paper size” display area 82b1, and a “paper size” display. An area 82b2, a “paper type” display area 82c1, a “paper type” display area 82c2, and an “OK” button 82d are provided. The “paper cassette name” display area 82a1, the “paper size” display area 82b1, and the “paper type” display area 82c1 are information relating to one paper cassette, and the “paper cassette name” display area 82a2 “ The “paper size” display area 82b2 and the “paper type” display area 82c2 are information relating to another sheet feeding cassette.
The “paper cassette name” display areas 82a1 and 82a2 are areas for displaying the names of the paper cassettes installed at positions other than the position set in the open detection notification. The name of the paper feed cassette is extracted from the paper feed cassette information in the storage unit 8.
The “paper size” display areas 82b1 and 82b2 are areas for displaying the paper size of the paper feed cassette installed at a position other than the position set in the open detection notification. Note that the paper size of the paper feed cassette is extracted from the paper feed cassette information in the storage unit 8.
The “paper type” display areas 82c1 and 82c2 are areas for displaying the paper types of the paper feed cassettes installed at positions other than the position set in the open detection notification. The paper type of the paper cassette is extracted from the paper cassette information in the storage unit 8.
The “OK” button 82 d is a button for deleting the paper information display screen 82.

  Next, the paper information screen process of the image forming apparatus 1 will be described with reference to FIG. When the user opens the paper feed cassette, the open / close sensor outputs an open detection notification that sets the position of the opened paper feed cassette to the control unit 7. When the opening detection notification is input, the control unit 7 activates the paper information screen processing unit 71, and the paper information screen processing unit 71 starts the paper information screen processing.

(Step S101)
First, the paper information screen processing unit 71 extracts the position of the paper feed cassette from the open detection notification.

(Step S102)
Next, the paper information screen processing unit 71 waits until the control unit 7 inputs a close detection notification.

(Step S103)
Next, since the open / close sensor outputs a close detection notification when the paper feed cassette is closed, the paper information screen processing unit 71 inputs the close detection notification.

(Step S104)
Next, the paper information screen processing unit 71 determines whether a paper pattern change detection notification is input when the paper feed cassette is closed. When the paper pattern change detection notification is input (Yes in step S104), the process proceeds to step S105. When the paper pattern change detection notification is not input (No in step S104), the process proceeds to step S106.

(Step S105)
In Yes of step S104, the paper information screen processing unit 71 displays a paper information setting screen 81 for the opened / closed paper feed cassette taken out in step S101 on the liquid crystal display unit 51, and ends the paper information screen processing. For example, when the position taken out in step S101 is “middle” and the paper cassette installed in “middle” is the paper cassette 41b, the paper information setting screen 81 of the opened and closed paper cassette 41b is displayed on the liquid crystal. It is displayed on the display unit 51.

(Step S106)
In step S104 No, the paper information screen processing unit 71 displays on the liquid crystal display unit 51 a paper information display screen 82 for the paper feeding cassette that has not been opened and closed other than the position taken out in step S101, and ends the paper information screen processing. To do. For example, when the position taken out in step S101 is “middle stage” and the paper cassettes installed in “upper stage” and “lower stage” other than “middle stage” are the paper feed cassette 41a and the paper feed cassette 41c, they are opened and closed. The sheet information display screen 82 of the sheet cassette 41 a and the sheet cassette 41 c that has not been displayed is displayed on the liquid crystal display unit 51.

  According to the above paper information screen processing, when the user opens the paper cassette and replenishes or replaces the paper in the paper cassette and then closes the paper cassette, the paper pattern change detection sensor detects the change in the paper pattern. Therefore, a paper information setting screen 81 for the opened and closed paper cassette is displayed. Thereby, the user can change the size and type of the paper without forgetting. Also, if the user accidentally opens or closes another paper cassette when replenishing or replacing paper, the paper pattern change detection sensor will not detect a change in paper pattern, so paper information other than the opened paper cassette will be displayed. A display screen 82 is displayed. Thus, the user can easily check the size and type of the paper stored in the paper supply set that replenishes or replaces the paper.

  Although the embodiment has been described in which the image forming apparatus 1 includes the three paper feeding cassettes, that is, the paper feeding cassette 41a, the paper feeding cassette 41b, and the paper feeding cassette 41c, the present invention is not limited to this. The present invention can also be applied to the image forming apparatus 1 having a sheet feeding cassette of more than one table. In addition, the sheet cassettes are identified by the positions of “upper stage”, “middle stage”, and “lower stage”. For example, the sheet cassettes are identified by “1st stage”, “2nd stage”, “3rd stage” It is also possible to identify such as “four steps”. Furthermore, it is possible to identify “capacity 1”, “capacity 2”, “capacity 3”, “capacity 4”, and the like according to the order of the capacity of the paper that can be stored in the paper feed cassette.

In the embodiment, the paper cassette name is displayed on the paper information setting screen 81 and the paper information display screen 82. However, the present invention is not limited to this. For example, the position of the paper feed cassette can be displayed on the paper information setting screen 81 and the paper information display screen 82. It is also possible to display both the sheet cassette name and the sheet cassette position on the sheet information setting screen 81 and the sheet information display screen 82. In this way, it is possible to display arbitrary identification information that allows the user to recognize which paper cassette is the paper cassette.
The paper information setting screen 81 can set paper cassette information other than the paper size and paper type.
The paper information display screen 82 can display paper cassette information other than the paper cassette name, paper size, and paper type.

  In the embodiment, the paper pattern change detection sensor that detects the change of the paper pattern when the paper stored in the paper feed cassette is replenished or replaced is used. It is also possible to use a pattern change detection sensor. For example, by using a paper pattern change detection sensor that can detect a change amount of a paper pattern according to a paper fiber pattern of a supplemented paper or a change amount of a fingerprint according to a color change width at the time of paper replenishment, The paper information screen processing unit 71 inputs a paper pattern change detection notification and a paper pattern change amount from the paper pattern change detection sensor, and after detecting a paper pattern change, the paper pattern change amount is greater than or equal to a preset change amount. The paper information setting screen 81 is displayed only when the change amount is equal to or greater than a preset change amount. That is, when the paper is replaced, the amount of change of the paper pattern becomes equal to or greater than a predetermined amount of change, so it can be determined whether the paper is replenished or replaced. 81 and the paper information display screen 82 are not displayed. Also, the paper information setting screen 81 is displayed only when the paper is replaced, and the paper information display screen 82 corresponding to a paper cassette other than the opened and closed paper cassettes is displayed when the paper is not replenished or replaced. be able to.

  Such an image forming apparatus of the present invention determines whether it is necessary to display a paper information setting screen for setting the size and type of paper, and displays the paper information setting screen when it is determined that it is necessary. be able to.

  As mentioned above, although this invention was demonstrated by specific embodiment, it cannot be overemphasized that the said embodiment is an illustration of this invention and is not limited to this embodiment.

  The present invention is suitable for an image forming apparatus. However, the present invention is not limited to an image forming apparatus, and can be generally applied to an apparatus including an apparatus and a process for displaying an operation screen on which a user performs an operation.

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus 1a ... Image forming apparatus 2 ... Document reading part 3 ... Document feeding part 4 ... Body part 5 ... Operation unit 6 ... Recording unit 7 ... Control unit 8 ... Storage unit 9 ... Communication unit 10 ... Network 11 ... Peripheral device 12 ...... Router 13 ... Internet 21 ... Scanner 22 ... Platen glass 23 ... Original reading slit 24 ... Light source 25 ... Light receiving unit 31... Document placing unit 32... Document discharge unit 33... Document transport mechanism 41 a... Paper feed cassette 41 b.・ Paper feed cassette 42a ... Paper feed cassette roller 42b ... Paper feed cassette roller 42c ...・ Paper feeding cassette roller 43... Paper transport path 44... Registration roller 45... Ejection roller 46... Ejection space 51. ... Operation buttons 61 ... Photoconductor drum 62 ... Charging part 63 ... Exposure part 64 ... Image forming part 65 ... Transfer part 66 ... ... Fixing section 67 ... Cleaning section 71 ... Paper information screen processing section 81 ... Paper information setting screen 81a ... "Paper cassette name" display area 81b ... .. "Paper size" input area 81c ... "Paper type" display area 81d ... "Paper type selection" operation area 81e ... "OK" button 82 ... Paper information display screen 82a1... “Paper cassette name” display area 82a2 ... "paper cassette name" display area 82b1 ... "paper size" display area 82b2 ... "paper size" display area 82c1 ... "paper type" display area 82c2 ... "paper type" Display area 82d ... "OK" button

Claims (3)

An image forming apparatus including a plurality of paper feed cassettes,
A paper cassette opening detection means for detecting that the paper cassette is opened;
A paper information screen processing means for displaying a paper information setting screen corresponding to the paper cassette;
A paper pattern change that outputs a paper pattern change detection notification to the paper information screen processing means when it detects that the paper pattern of the paper stored in the paper cassette has changed when the opened paper cassette is closed Detecting means,
The paper information screen processing means displays the paper information setting screen corresponding to the paper feed cassette when the paper pattern change detection notification is input ,
The paper information screen processing means displays a paper information display screen corresponding to the paper feed cassette that has not been opened and closed other than the paper feed cassette when the paper pattern change detection notification is not input. Image forming apparatus. When the paper pattern change detecting means detects that the paper pattern of the paper has changed, it detects the amount of change of the paper pattern, and outputs the amount of change to the paper information screen processing means.
The paper information screen processing means receives the paper print change detection notification and the change amount of the paper print from the paper print change detection means, and when the change amount is equal to or greater than a preset change amount, display information setting screen, the image forming apparatus according to claim 1, wherein the variation does not display the sheet information setting screen when it is less than a preset variation. The sheet information display screen, an image forming apparatus according to claim 1 or 2, characterized in that the paper feed cassette information for a plurality of the paper feed cassette are displayed.

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