Image forming device

Abstract

To provide an image forming apparatus that has a higher convenience than a prior art in that the image forming apparatus displays, to a user, a confirmation screen for paper settings at an appropriate timing according to the user's usage state.SOLUTION: An image forming apparatus comprises: a paper tray; a paper detection sensor that detects that paper is set on the paper tray; a display unit; and a control unit. When the paper detection sensor detects paper on the paper tray, the control unit determines whether to display a confirmation screen for paper settings on the display unit, when a predetermined confirmation unnecessary condition is met, does not display the confirmation screen on the display unit, and when the confirmation unnecessary condition is not met, displays the confirmation screen on the display unit.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an image forming apparatus. [Background technology]

[0002] Some paper feed trays of image forming apparatuses, particularly manual feed trays, do not have an automatic paper size detection function due to cost and other issues. In such image forming devices, paper transport and fixing are controlled based on the paper size and paper type preset by the user, but if paper different from the settings is set in the paper feed tray, problems such as paper jams and fixing problems may occur.

[0003] To solve such problems, an invention has been disclosed in which an image forming device detects that paper has been set in the manual feed tray, and then pops up a manual feed paper settings screen on the display of the operation panel, prompting the user to input size information and paper type information for the paper set in the manual feed tray (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-87470 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, if a confirmation screen is uniformly popped up on the display when paper is set in the paper feed tray, not only will it interfere with user operations, but it may actually reduce user convenience because the display of serious errors, etc. will be hidden by the confirmation screen.

[0006] This invention has been made in consideration of such problems, and provides an image forming device that is more convenient than conventional devices by displaying a paper setting confirmation screen to the user at an appropriate time depending on the user's usage situation. [Means for solving the problem]

[0007] The present invention provides an image forming apparatus comprising a paper tray, a paper detection sensor which detects that paper has been set in the paper tray, a display unit and a control unit, wherein when the paper detection sensor detects paper in the paper tray, the control unit determines whether or not a paper setting confirmation screen should be displayed on the display unit, and if predetermined conditions for no confirmation are met, the confirmation screen is not displayed on the display unit, and if the conditions for no confirmation are met, the confirmation screen is displayed on the display unit. Effect of the Invention

[0008] According to this invention, by displaying the confirmation screen for paper settings to the user at an appropriate timing according to the user's usage, it is possible to realize an image forming apparatus that is more convenient than ever before. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing an external appearance of a digital multifunction peripheral according to the present invention; [Diagram 2] 2 is a perspective view of the digital multifunction peripheral of FIG. 1 as seen from a different angle. [Diagram 3] FIG. 2 is a plan view of the digital multifunction peripheral of FIG. [Figure 4] 2 is an explanatory diagram showing a panel unit of the digital multifunction peripheral of FIG. 1. [Diagram 5] 2 is a block diagram showing a schematic configuration of the digital multifunction peripheral of FIG. 1. [Figure 6] 5 is a flowchart showing an outline of a display procedure for a confirmation screen for paper settings in the digital multifunction peripheral of FIG. 1. [Figure 7] 7 is a flowchart showing an example of a display procedure of the confirmation screen for paper settings in FIG. 6. [Figure 8] 1. FIG. 4 is an explanatory diagram showing an example of a confirmation screen for paper settings in the digital multifunction peripheral of FIG. [Figure 9] 2 is an explanatory diagram showing an example of a paper setting screen of the digital multifunction peripheral of FIG. 1; [Figure 10] 2 is an explanatory diagram showing an example of a copy screen of the digital multifunction peripheral of FIG. 1; [Figure 11] 11 is a flowchart showing an outline of a display procedure of a confirmation screen for paper settings in a digital multifunction peripheral according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (1) An image forming apparatus according to the present invention comprises a paper tray, a paper detection sensor which detects that paper has been set in the paper tray, a display unit and a control unit, and when the paper detection sensor detects paper in the paper tray, the control unit determines whether or not a paper setting confirmation screen should be displayed on the display unit, and if predetermined conditions for no confirmation are met, the control unit does not display the confirmation screen on the display unit, and if the conditions for no confirmation are met, the control unit displays the confirmation screen on the display unit.

[0011] In the present invention, the "paper tray" is a predetermined tray, such as a manual feed tray, a paper feed cassette, etc. The paper tray is not limited to one, and may be multiple paper trays. The "paper setting confirmation screen" is a screen for confirming paper settings such as paper type and size. The "conditions not requiring confirmation" are conditions under which it is not necessary to display the confirmation screen for paper settings.

[0012] Further, preferred embodiments of the present invention will be described.

[0013] (2) In the image forming apparatus of the present invention, the confirmation-free condition may include a case where the display unit is displaying a paper setting screen.

[0014] In this way, if the paper setting screen is already being displayed, there is no need to display the paper setting confirmation screen again, making it possible to realize an image forming apparatus that is more convenient than ever before.

[0015] (3) In the image forming apparatus of the present invention, the confirmation-free condition may include a case where the display unit is displaying a predetermined manual or message.

[0016] Here, the "predetermined manual or message" is, for example, an instruction manual or a message to the user.

[0017] In this way, when an instruction manual or a message to the user is being displayed, the display of the paper setting confirmation screen will not interrupt the display, making it possible to realize an image forming apparatus that is more convenient than ever before.

[0018] (4) The image forming apparatus of the present invention may further include a user authentication unit, and the confirmation no-necessity condition may include a case where the user has not been authenticated by the user authentication unit.

[0019] Here, "the user has not been authenticated by the user authentication unit" refers to, for example, a state in which the user has not logged in to the image forming apparatus.

[0020] In this way, there is no need to display the paper setting confirmation screen before user authentication, and the authentication screen is not obstructed by the display of the confirmation screen, making it possible to realize an image forming apparatus that is more convenient than conventional apparatuses.

[0021] (5) The image forming apparatus of the present invention may further include an error notification unit, and the confirmation unnecessary condition may include a case where the error notification unit is notifying an error.

[0022] In this way, the display of the confirmation screen does not interfere with checking the error display or with setting the error display, making it possible to realize an image forming apparatus that is more convenient than ever before.

[0023] (6) The image forming apparatus of the present invention may further include a power saving mode transition unit, and the confirmation unnecessary condition may include a case where the image forming apparatus is being transitioned to the power saving mode by the power saving mode transition unit.

[0024] In this way, the power saving mode will not be cancelled due to the confirmation screen being displayed during the transition to the power saving mode, and therefore an image forming apparatus that is more convenient than ever before can be achieved.

[0025] (7) In the image forming apparatus of the present invention, the confirmation unnecessary condition may include a case where image formation is being performed from the paper tray.

[0026] In this way, when image formation is being performed from the paper tray, there is no need to change the paper settings, and therefore the confirmation screen is not displayed, making it possible to realize an image forming device that is more convenient than conventional devices.

[0027] (8) In the image forming apparatus of the present invention, the control unit may be configured to cause the display unit to continue displaying the confirmation screen if the paper detection sensor no longer detects paper set in the paper tray after the display unit has displayed the confirmation screen.

[0028] In this way, if the paper detection sensor can no longer detect the paper set in the paper tray due to the paper running out or the like, the paper type is unlikely to be changed, so by keeping the confirmation screen for the paper settings before the paper ran out displayed, it is possible to realize an image forming device that is more convenient than before.

[0029] The present invention will be described in more detail below with reference to the drawings. Note that the following description is illustrative in all respects and should not be construed as limiting the present invention.

[0030] [Embodiment 1] 1 to 4, a digital multifunction peripheral 1 as an example of an image forming apparatus equipped with the image forming apparatus of the present invention will be outlined. Fig. 1 is a perspective view showing the appearance of a digital multifunction peripheral 1 of the present invention. Fig. 2 is a perspective view of the digital multifunction peripheral of Fig. 1 seen from another angle. Fig. 3 is a plan view of the digital multifunction peripheral 1 of Fig. 1. Fig. 4 is an explanatory diagram showing an example of a panel unit 17 of Fig. 1.

[0031] The digital multifunction machine 1 has a copying function, a scanner function, and a facsimile function, and is a device that digitally processes image data read from an original and outputs the processed image data.

[0032] As shown in FIGS. 1 to 4, the digital multifunction peripheral 1 includes a manual feed tray 161, a paper feed cassette 162, a document set table 163, and a panel unit 17. The manual feed tray 161 is a paper feed tray. As shown in FIG. 4, the panel unit 17 includes a display operation section 171 and a physical operation section 172 having a touch panel function.

[0033] Next, the schematic configuration of the digital multifunction peripheral 1 will be described with reference to FIG. FIG. 5 is a block diagram showing a schematic configuration of the digital multifunction peripheral 1 of FIG. As shown in FIG. 5, the digital multifunction peripheral 1 includes a control unit 10, an image reading unit 11, an image forming unit 12, a storage unit 13, an image processing unit 14, a communication unit 15, a paper feeding unit 16 and a panel unit 17. Each component of the digital multifunction peripheral 1 will be described below.

[0034] The control unit 10 controls the digital multifunction peripheral 1 in an integrated manner, and is composed of a CPU, RAM, ROM, various interface circuits, and the like. In order to control the overall operation of the digital multifunction peripheral 1, the control unit 10 monitors and controls the detection of each sensor and all loads such as a motor, a clutch, and a panel unit 17.

[0035] The image reading unit 11 detects and reads an original such as a card placed on an original setting table 163 or an original conveyed from a paper tray, and generates image data.

[0036] The image forming unit 12 is a part that prints out image data generated by the image processing unit 14 onto paper, and includes an LSU 121 . The LSU 121 is a device that irradiates the surface of a charged photoconductor drum with laser light corresponding to image information made up of digital signals obtained by the image reading unit 11, thereby forming an electrostatic latent image.

[0037] The storage unit 13 is an element or storage medium that stores information and control programs necessary to realize various functions of the digital multifunction device 1. For example, a semiconductor element such as a RAM or a ROM, a hard disk, a flash storage unit, an SSD, or other storage medium is used. The program and the data may be stored in different devices, such as an area for storing data being configured as a hard disk drive and an area for storing programs being configured as a flash memory unit.

[0038] The image processing unit 14 is a unit that converts the image of the document read by the image reading unit 11 into an appropriate electrical signal to generate image data. It also processes the image data input from the image reading unit 11 in accordance with a command from the display operation unit 171 so that it is suitable for output such as enlargement and reduction. It also associates multiple image data according to a predetermined layout.

[0039] The communication unit 15 is a part that communicates with computers, portable information terminals, external information processing devices, facsimile machines, etc. via a network, etc., and transmits and receives various information such as e-mail and fax to and from these external communication devices.

[0040] The paper feed unit 16 is a part that conveys paper stored in a manual feed tray 161 , a paper feed cassette 162 , and a document set table 163 to the image forming unit 12 .

[0041] The panel unit 17 is a unit equipped with a liquid crystal display, and includes a display operation section 171 and a physical operation section 172 .

[0042] The display operation unit 171 displays various information and receives commands from the user via a touch panel function. The display operation unit 171 is a display device such as a monitor or line display that is configured with, for example, a CRT display, a liquid crystal display, or an EL display, and is used by the operating system and application software to display electronic data such as the processing state. The control unit 10 displays the operation and state of the digital multifunction peripheral 1 through the display operation unit 171.

[0043] <Outline of procedure for displaying the paper settings confirmation screen> Next, an outline of a display procedure for the confirmation screen for paper settings of the digital multifunction peripheral 1 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 6 is a flowchart showing an outline of a display procedure of the confirmation screen for paper settings of the digital multifunction peripheral 1 of FIG.

[0044] In step S1 of FIG. 6, the control unit 10 determines whether or not a sheet is detected in the manual feed tray 161 (step S1). If paper is detected in the manual feed tray 161 (if the determination in step S1 is Yes), the control unit 10 performs the determination in step S2 (step S2). On the other hand, if no paper is detected in the manual feed tray 161 (if the determination in step S1 is No), the control unit 10 repeats the determination in step S1 (step S1).

[0045] Next, in step S2, the control unit 10 determines whether or not a predetermined condition for not displaying a confirmation screen for paper settings (hereinafter, "confirmation non-existent condition") is satisfied (step S2).

[0046] Here, an example of a condition where confirmation of the paper settings is not required is shown in Table 1 below.

[0047] [Table 1]

[0048] Each condition in Table 1 will be explained below.

[0049] 1. If "the paper settings screen is being displayed," there is no need to redundantly display the paper settings confirmation screen, so this is included in the conditions for not requiring confirmation of the paper settings.

[0050] 2. If the paper settings confirmation screen is displayed while the instruction manual is being displayed, there is a risk that the user will not be able to see the information they want to see, so this is included in the conditions for not requiring confirmation of the paper settings.

[0051] 3. In the case of "before user authentication login," it is problematic to be able to perform operations such as changing the paper settings when the user is not logged in, and there is also the risk that the display of the confirmation screen may interfere with the login screen, so this is included in the conditions for not requiring confirmation of the paper settings.

[0052] 4. If "a jam / trouble warning is being displayed," this is included in the conditions for not requiring confirmation of paper settings, since there is a risk that the display of the confirmation screen may interfere with the display of high-priority error messages or setting screens.

[0053] 5. When "stopped due to a maintenance request," there is a risk that the display of a confirmation screen may interfere with the display of a high-priority maintenance request, so this is included in the conditions for not requiring confirmation of the paper settings.

[0054] 6. If the printer is in energy saving mode, this will be included in the conditions for not requiring confirmation of the paper settings in order to prevent the energy saving mode from being cancelled due to the confirmation screen being displayed.

[0055] 7. If "Serviceman mode is running," a confirmation screen may be displayed during inspection by a serviceman, disrupting the settings screen or changing the paper settings, which could cause problems. Therefore, this is included in the conditions for not requiring confirmation of the paper settings.

[0056] 8. If "printing from the target tray is in progress," problems will occur if the paper settings are changed, so this is included in the conditions under which checking of the paper settings is not required.

[0057] Next, in step S2, if a predetermined condition for not requiring confirmation of the paper settings is satisfied (if the determination in step S2 is Yes), the control unit 10 performs a determination in step S4 (step S4).

[0058] On the other hand, if the predetermined condition for not requiring confirmation of the paper settings is not met (if the determination in step S2 is No), the control unit 10 displays a confirmation screen for the paper settings in step S3 (step S3). After that, the control unit 10 performs the determination in step S4 (step S4).

[0059] Next, in step S4, control unit 10 determines whether display operation unit 171 or physical operation unit 172 has received a print command (step S4). When display operation unit 171 or physical operation unit 172 receives a print command (when the determination in step S4 is Yes), control unit 10 causes image forming unit 12 to execute printing on paper in step S5 (step S5). Thereafter, the control unit 10 ends the process.

[0060] On the other hand, if display operation unit 171 or physical operation unit 172 has not received a print command (if the determination in step S4 is No), control unit 10 repeats the determination in step S4 (step S4).

[0061] Next, the display of the confirmation screen for paper settings in step S3 of FIG. 6 will be described in detail with reference to FIGS. Fig. 7 is a flow chart showing an example of a display procedure for the confirmation screen of the paper settings in Fig. 6. Fig. 8 is an explanatory diagram showing an example of the confirmation screen of the paper settings of the digital multifunction peripheral 1 in Fig. 1. Fig. 9 is an explanatory diagram showing an example of the paper settings screen of the digital multifunction peripheral 1 in Fig. 1. Fig. 10 is an explanatory diagram showing an example of the copy screen of the digital multifunction peripheral 1 in Fig. 1.

[0062] When paper is detected in manual feed tray 161, in step S11 of FIG. 7, control unit 10 displays a confirmation screen for paper setting (step S11).

[0063] FIG. 8 shows an example of a paper setting confirmation screen CS1 displayed as a pop-up on the display operation unit 171. The confirmation screen CS1 displays the message "The current manual feed tray settings are as follows" along with the paper type, "Type: Plain Paper 1 (60-79 g / m 2 )" and "Size: A4" indicating the paper size. Additionally, a change key K1 and an OK key K2 are also displayed together with the message "If you want to print on a different paper, press [Change]."

[0064] Next, in step S12 of FIG. 7, the control unit 10 determines whether or not the setting change key has been touched (step S12). If the setting change key is touched (if the determination in step S12 is Yes), the control unit 10 goes to step S13 to display a paper setting screen (step S13). On the other hand, if the setting change key has not been touched (if the determination in step S12 is No), the control unit 10 performs the determination in step S15 (step S15).

[0065] FIG. 9 shows an example of a paper setting screen SS1 displayed as a pop-up on the display operation unit 171. As shown in FIG. The paper setting screen SS1 has two tabs, "Paper Type Setting" and "Paper Size Setting." In the example of FIG. 9, the paper type setting tab is displayed and "Plain Paper 1" is selected.

[0066] If the user wishes to change the paper type, he or she touches another key such as "Plain Paper 2." If the user wishes to change the paper size, he or she selects the "Paper Size Settings" tab and then touches the key for the desired paper size.

[0067] Next, in step S14 of FIG. 7, the control unit 10 determines whether or not the display operation unit 171 has accepted a setting change (step S14). When the display operation unit 171 accepts the setting change (when the determination in step S14 is Yes), the control unit 10 repeats the process of step S11 (step S11). On the other hand, if the display operation unit 171 has not accepted the setting change (if the determination in step S14 is No), the control unit 10 repeats the determination in step S13 (step S13).

[0068] In the example of FIG. 9, when "Plain Paper 1" is changed to "Plain Paper 2", the control unit 10 causes the display operation unit 171 to pop up a confirmation screen CS2 for confirming the paper setting changed to "Type: Plain Paper 2".

[0069] Next, in step S15 of FIG. 7, the control unit 10 determines whether or not the setting confirmation key has been touched (step S15). If the setting confirmation key is touched (if the determination in step S15 is Yes), the control unit 10 displays a copy screen in step S16 (step S16). Thereafter, the control unit 10 ends the process of displaying the confirmation screen for paper settings.

[0070] On the other hand, if the setting confirmation key has not been touched (if the determination in step S15 is No), the control unit 10 repeats the determination in step S12 (step S12).

[0071] In the example of FIG. 8, when the OK key K2 serving as a setting confirmation key is pressed, the control unit 10 displays a copy screen as shown in FIG. Thereafter, when the start key K3 is touched, the control unit 10 causes the image forming unit 12 to execute printing on paper.

[0072] In this way, when paper is detected in the manual feed tray 161, the paper setting confirmation screen is displayed only if the confirmation-free condition is not met, thereby allowing the paper setting confirmation screen to be displayed to the user at an appropriate time depending on the user's usage, thereby realizing a digital multifunction printer 1 that is more convenient than ever before.

[0073] [Embodiment 2] As a second embodiment, not only when paper is set in the manual feed tray 161, but also when paper is detected in a specified paper feed cassette 162 or document set table 163, the process of displaying the paper setting confirmation screen may be performed according to the procedures in Figures 6 and 7.

[0074] In this way, even if the digital multifunction printer 1 does not have a detection sensor that detects the type or size of paper in a specified paper feed cassette 162 or document set tray 163, a paper setting confirmation screen can be displayed to the user at an appropriate time depending on the user's usage, thereby making the digital multifunction printer 1 more convenient than before.

[0075] [Embodiment 3] Next, an outline of a display procedure for the confirmation screen for paper settings of the digital multifunction peripheral 1 according to the third embodiment of the present invention will be described with reference to FIG. FIG. 11 is a flowchart showing an outline of a display procedure of the confirmation screen for paper settings of the digital multifunction peripheral 1 according to the second embodiment of the present invention.

[0076] Note that the processes of steps S21 to S23, S25 and S26 in FIG. 11 are the same as the processes of steps S1 to S5 in FIG. 5, and therefore the description thereof will be omitted. Here, the process of step S24 in FIG. 11 will be described.

[0077] If the paper detection sensor no longer detects the paper set in the manual feed tray 161 due to paper running out or the like, the user can replenish the paper of the same type, so there is no need to display a confirmation screen for new paper settings.

[0078] Therefore, after displaying a confirmation screen for paper settings in step S23 of FIG. 11 (step S23), the control unit 10 determines in step S24 whether or not paper is no longer detected in the manual feed tray 161 (step S24).

[0079] When no paper is detected in the manual feed tray 161 (when the determination in step S24 is Yes), the control unit 10 repeats the process in step S23 (step S23). On the other hand, if paper is detected in the manual feed tray 161 (if the determination in step S24 is No), the control unit 10 performs the determination in step S25 (step S25).

[0080] In this way, even if paper is no longer detected after paper is detected in the manual feed tray 161, the confirmation screen for the paper settings before the paper ran out can remain displayed, thereby realizing a digital multifunction printer 1 that is more convenient than conventional ones.

[0081] [Embodiment 4] As a fourth embodiment, even if a function setting dialog or the like is already being displayed on the display operation unit 171, a paper setting confirmation screen may be displayed on top of it, and after the setting confirmation key is touched, the original dialog may be displayed.

[0082] In this way, even after the paper setting confirmation screen is displayed on the display operation unit 171 and the setting confirmation key is touched, the function setting dialogue or the like continues to be displayed, making it possible to continue the setting, thereby realizing a digital multifunction machine 1 that is more convenient than ever before.

[0083] [Embodiment 5] As a fifth embodiment, when the paper runs out during execution of a job such as printing, refilling the paper may also be added to the conditions for not requiring confirmation of the paper settings.

[0084] In this way, when the paper runs out during execution of a job such as printing, there is no need to change the paper size or type, making it possible to realize a digital multifunction peripheral 1 that is more convenient than ever before.

[0085] [Embodiment 6] As a sixth embodiment, when a screen displaying the job start key K3, such as the basic copy screen in FIG. 10, is displayed, if a paper setting confirmation screen is displayed on the display operation unit 171, the start key K3 may be made inoperable.

[0086] In this way, it is possible to prevent the job start key K3 from being touched by mistake while the confirmation screen is being displayed, and therefore it is possible to realize a digital multifunction peripheral 1 that is more convenient than the conventional one.

[0087] [Embodiment 7] In a seventh embodiment, in a case where a screen that is not to be displayed as the paper setting confirmation screen is displayed on the display operation unit 171, if paper is detected in the manual feed tray 161 and then the screen transitions to the copy screen, the paper setting confirmation screen may not be displayed on the display operation unit 171.

[0088] Here, the "screens that are not subject to display of the paper setting confirmation screen" include, for example, the screen in the serviceman mode, etc. This is because servicemen are familiar with the paper setting operations and will not miss any settings even without this guidance display, and displaying the paper setting confirmation screen would actually decrease work efficiency.

[0089] In this way, the number of operational steps required for inspection by a service technician can be reduced, and the efficiency of the work can be improved, making it possible to realize a digital multifunction peripheral 1 that is more convenient than ever before.

[0090] [Embodiment 8] As an eighth embodiment, when a setting dialogue for a predetermined paper feed cassette 162 is being displayed, if paper is detected in manual feed tray 161, a confirmation screen for paper setting may be displayed on display operation unit 171.

[0091] At this time, the setting of the paper feed cassette 162 is set to the currently selected paper feed cassette 162, and is switched to the manual feed tray 161 when the setting change key is touched.

[0092] In this way, the setting operation of the selected paper feed cassette is not hindered, and the current operation can be given priority and continued, thereby realizing a digital multifunction printer 1 that is more convenient than ever before.

[0093] Preferred aspects of the present invention include any combination of the above-mentioned aspects. In addition to the above-mentioned embodiment, various modifications of the present invention are possible. These modifications should not be interpreted as not belonging to the scope of the present invention. The present invention should include the equivalent meaning of the claims and all modifications within the said scope. [Explanation of symbols]

[0094] 1: digital multifunction device, 10: control unit, 11: image reading unit, 12: image forming unit, 13: memory unit, 14: image processing unit, 15: communication unit, 16: paper feed unit, 17: panel unit, 121: LSU, 161: manual feed tray, 162: paper feed cassette, 163: document setting tray, 171: display operation unit, 172: physical operation unit, CS1: confirmation screen, K1: change key, K2: OK key, K3: start key, SS1: paper setting screen

Claims

1. It has multiple functions including a copying function and a scanner function, a paper feed cassette, a manual feed tray, a paper detection sensor that detects that paper is set in the manual feed tray, a display unit that displays a display screen, and a control unit; the display screen has a function selection area that allows one of the plurality of functions to be selected, a basic area that displays a screen corresponding to the selected one function, and a job start key, the function selection area being disposed above the basic area, when the selected one function is the copy function and the paper detection sensor detects paper while a screen corresponding to the copy function is displayed in the basic area, the control unit displays a paper setting confirmation screen in the basic area based on the detection by the paper detection sensor, and displays in the function selection area a function currently selected during the display of a paper setting screen that can be transitioned from the confirmation screen and that allows the user to select paper to be printed; when the paper detection sensor detects paper while the paper settings of the currently selected paper feed cassette are displayed, a confirmation screen for the paper settings is displayed in the basic area based on the detection by the paper detection sensor, the job start key is disabled from being operated while being displayed, and the paper feed cassette is placed in a selected state; When a setting confirmation button is operated on the paper setting confirmation screen, the job start key is displayed in an operable state and the manual feed tray is selected, An image forming device characterized in that, when an error that prevents the execution of a currently selected function is detected, a warning screen is displayed on the display unit, and while the warning screen is displayed, the paper setting confirmation screen is not displayed in the basic area.

2. 2. An image forming apparatus according to claim 1, wherein when the manual feed tray runs out of paper during execution of a job, paper is set in the manual feed tray, and the paper setting before the paper shortage occurs is displayed based on detection of the paper by the paper detection sensor.

3. The image forming apparatus according to claim 2, wherein the control unit, based on detection of paper in the manual feed tray by the paper detection sensor, causes the display unit to display the paper setting confirmation screen together with a portion of the display screen that was displayed on the display unit before the paper was set in the manual feed tray.

4. The image forming apparatus according to claim 1 , wherein the warning screen is displayed when a paper jam occurs.

5. 2. The image forming apparatus according to claim 1, wherein the warning screen is a warning screen that is displayed when a trouble occurs.

6. A user authentication unit is further provided, 6. The image forming apparatus according to claim 1, wherein the control unit does not cause the display unit to display the confirmation screen for paper settings when the user authentication unit has not performed user authentication.

7. A power saving mode transition unit is further provided, 6. The image forming apparatus according to claim 1, wherein the control unit does not cause the display unit to display the confirmation screen for paper settings when the power saving mode transition unit is transitioning to the power saving mode.

Images