JP2018109927A - Image display device and error display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose: an error display method for allowing a user to easily recognize the cause of occurrence of an error display displayed on an operation screen; and an image display device.SOLUTION: An image display device 1 comprises an operation panel 3 provided with a touch panel 2. A control unit 30 displays an operation screen on a display screen of the touch panel 2. A plurality of buttons are arranged on the operation screen. The control unit 30 determines that a button the setting of which is in an exclusive relation with the current setting is unselectable, and displays the unselectable button in a grayout state. When a touch of a button displayed in a grayout state is detected, the touched button 651 and an error display window 70 are simultaneously displayed on the display screen. For example, the touched button 651 is slid to the upper side of the screen, and the error display window 70 is slid in a vacant space below the button 651.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an image display device including an image display unit that displays an operation screen, and an error display method on the image display unit.

  Conventionally, in various apparatuses having an image display unit, an operation screen on which GUI parts (GUI: Graphical User Interface) such as buttons are displayed is displayed, and an operation instruction is made by touching the GUI part or clicking with a cursor or the like. There is something to enter. Further, when a GUI component that cannot be operated with the current setting is displayed on the operation screen, the GUI component that cannot be operated is grayed out and displayed. The gray-out display means that the display is masked with gray having a predetermined density.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses a multifunction machine that performs this type of display. The multifunction device of Patent Document 1 includes an operation display unit that can input by touching an operation screen, and an operation display control unit that controls the operation display unit. The operation display control unit determines that the menu of the setting item that has an exclusive relationship with the setting item that has already been set cannot be selected, and displays the GUI part of the menu that cannot be selected in gray.

JP 2008-42417 A

  In Patent Document 1, when a grayed out menu is touched, a message (error display) indicating that an operation command corresponding to the touched menu cannot be executed is displayed. However, since the window for displaying this message is arranged in the center of the screen, the GUI component (grayed out menu) that causes the message is hidden in the error display and cannot be visually recognized by the user. As a result, there is a problem that it is difficult to understand why the error display is displayed. In particular, if a user accidentally touches a menu that is grayed out, the user may not be able to immediately understand why the error message is displayed, which may cause confusion.

  In view of the above, an object of the present invention is to propose an error display method and an image display apparatus that allow a user to easily recognize the cause of error display displayed on an operation screen.

  In order to solve the above-described problems, an image display device of the present invention includes an image display unit and a control unit that displays an operation screen on the image display unit, and the control unit is included in the image display unit. The image display unit displays the first component and an error display regarding the operation prohibition of the first component in response to the operation of the first component while the operation of the displayed first component is prohibited. Are simultaneously displayed.

  The error display method of the present invention includes a determination step of determining whether or not the operation of the first component is prohibited when the first component displayed on the image display unit is operated, and the first An error display step of simultaneously displaying on the image display unit an error display regarding the operation prohibition of the first component and the first component when it is determined that the operation of the component is prohibited. And

  In the image display device and the error display method thereof according to the present invention, when a first component such as a GUI component that is prohibited from being operated is operated, the first component and the error display are simultaneously displayed on the display screen. In this way, the user can visually recognize the first component that caused the error display and the error display at the same time. Therefore, the user can easily understand the cause of the error display. The parts are not limited to the same parts in the data. For example, the parts for which the operation is prohibited and the parts displayed at the same time as the error display may be prepared separately on the data as long as the user recognizes that they are equivalent. Further, the color, the definition, etc. may be different.

  In the display device of the present invention, the image display unit may be provided on a touch panel. In such a configuration, the user can easily understand the cause of the error display when a GUI component that is prohibited from being operated is touched by mistake.

  In the image display device and the error display method of the present invention, the display position of the first component on the operation screen is determined in response to the operation of the first component while the operation of the first component is prohibited. Preferably, the error display is displayed at a position where the first part is displayed before the display position is changed. In this way, a space for displaying an error display can be secured. Therefore, the first component that caused the error display and the error display can be displayed simultaneously.

  In the image display device and the error display method of the present invention, the first component is one of a plurality of buttons arranged in a first direction, and the control unit is prohibited from operating the first component. The plurality of buttons are scroll-displayed in the first direction and the error display is slid in the first direction on the operation screen in response to the first component being operated in a state where Is desirable. In this way, since the error display and the first component that caused the error display move in the same direction, it is easy to intuitively recognize that the first component is the cause of the error display. Therefore, the user can easily understand the cause of the error display.

  In the image display device and the error display method of the present invention, when the operation of the first part is prohibited, the first part is grayed out and displayed, and the operation of the first part is prohibited. It is desirable that the gray-out display of the first part is canceled in response to the operation of the first part, and the parts other than the first part and the error display are grayed-out and displayed. In this way, the error display and the first component that caused the error display can be made conspicuous in the display screen. Therefore, it is easy to intuitively recognize that the first component is the cause of the error display. Therefore, the user can easily understand the cause of the error display.

  In the image display device and the error display method of the present invention, when the error display is ended, it is desirable to return to the display immediately before the operation of the first component while the operation of the first component is prohibited. In this way, the user can continue the operation such as the setting input performed immediately before the error display is displayed.

It is a block diagram of an image display device to which the present invention is applied. It is explanatory drawing of a 1st operation screen. It is explanatory drawing of a 2nd operation screen (multipage selection screen). It is explanatory drawing of a 2nd operation screen (multipage selection screen). It is explanatory drawing of a 2nd operation screen (layout order selection screen). It is explanatory drawing of the error display when a gray out button is touched. It is a flowchart of a touch detection and an error display.

  Hereinafter, an embodiment of an image display device to which the present invention is applied and an error display method thereof will be described with reference to the drawings.

  FIG. 1 is a block diagram of an image display apparatus 1 to which the present invention is applied. The image display device 1 is a multi-function machine including a printing mechanism 10 and an optical scanner unit 20, and includes a housing that houses the printing mechanism 10 and the scanner unit, and an operation panel 3 provided at a predetermined position of the housing. Prepare. A touch panel 2 is provided on the operation panel 3. The touch panel 2 includes an image display unit 4 that displays an operation screen, and a position input unit 5 that is disposed on the screen of the image display unit 4. The position input unit 5 detects the touch position of the user on the operation screen displayed on the image display unit 4. Note that the operation panel 3 may include other input units and display units in addition to the touch panel 2. For example, buttons or switches that can be physically pressed, LED lamps, and the like may be provided.

  The image display device 1 includes a control unit 30 that controls the printing mechanism 10 and the scanner unit 20, and an interface unit 40 for communicating with other devices via a network. The control unit 30 controls the printing mechanism 10 based on the print job data received via the interface unit 40, and prints the contents designated by the print job data. The image display device 1 also has a copy function. Based on an operation input from the operation panel 3, the control unit 30 copies the original by printing image data generated by scanning the original with the scanner unit 20 with the printing mechanism 10. Further, the image display device 1 may have other functions. For example, a FAX function for transmitting image data generated by scanning a document with the scanner unit 20 to a transmission destination input from the operation panel 3 may be provided.

  The control unit 30 includes a CPU 31, a ROM 32 that is a nonvolatile memory, and a RAM 33 that is a volatile memory. Further, the control unit 30 may include an ASIC, a signal processing circuit, or the like (not shown). Alternatively, an HDD that stores received data and data obtained by scanning a document may be provided. In the control unit 30, for example, the CPU 31 reads a program such as firmware stored in the ROM 32 and the RAM 33 and executes processing, and executes processing by a function installed in, for example, an ASIC. Various processes are executed in cooperation with hardware and software, such as executing processes.

  The control unit 30 executes the touch panel control program stored in the ROM 32 to display an operation screen on the image display unit 4 of the touch panel 2 and accept an operation input to the position input unit 5 of the touch panel 2. A liquid crystal display (LCD) is used as the image display unit 4. The position input unit 5 is, for example, a type that detects a light shielding position (touch position) using a light emitting element and a light receiving element. Alternatively, another detection type touch panel may be used.

(Operation screen)
When the image display device 1 is turned on and the operation panel 3 is activated, a main menu screen which is one of the operation screens is displayed on the touch panel 2. On the main menu screen, GUI parts indicating a plurality of menu items are displayed. For example, buttons such as “copy”, “scan”, and “setup” are displayed. When the “Copy” button is touched on the main menu screen, the operation screen displayed on the touch panel 2 transitions from the main menu screen to an operation screen for performing copying.

  2 to 5 are explanatory diagrams of operation screens displayed on the touch panel 2, and show operation screens when settings relating to the copy function are performed. FIG. 2 is an explanatory diagram of the first operation screen 50, and FIGS. 3 to 5 are explanatory diagrams of the second operation screen 60. On each operation screen, GUI parts such as buttons, tabs, and scroll bars for performing operation input are arranged.

  As shown in FIG. 2, the first operation screen 50 includes a first area 51, a second area 52, and a third area 53. The first area 51 is a vertically long area arranged at the right end of the screen of the touch panel 2. In the first area 51, a plurality of GUI parts indicating operation menus are displayed. For example, in the example of FIG. 2, four buttons 511, 512, 513, and 514 are arranged in a line in the vertical direction F of the screen. The button 511 is a “copy start button”, the button 512 is a “preview button”, the button 513 is a “copy number setting button”, and the button 514 is a “preset (favorite) button”.

  The second area 52 is arranged at the upper end of the left area of the first area 51. In the second area 52, a first tab T1 and a second tab T2, which are GUI parts for selecting two setting screens, are displayed. When the first tab T1 displayed as “Basic Settings” is touched, a basic setting screen is displayed. Further, when the second tab T2 displayed as “Advanced” is touched, a detailed setting menu screen 54 shown in FIG. 2 is displayed. On the detailed setting menu screen 54, a scroll bar 55 extending in the vertical direction F of the screen is displayed. When an arrow displayed at the end of the scroll bar 55 is touched, the detailed setting menu screen 54 scrolls in the direction of the arrow. The detailed setting menu screen 54 displays a plurality of GUI parts indicating setting items. In the example of FIG. 2, a plurality of buttons 541, 542, 543, and 544 are arranged in the vertical direction F of the screen. By touching each button, a transition is made to an operation screen for specific input of detailed settings. For example, when a button 541 displayed as “Multi-Page” is touched, as shown in FIG. 3, a transition is made to the second operation screen 60 for performing multi-page setting.

  As shown in FIGS. 3 and 4, the second operation screen 60 includes a first area 61, a second area 62, and a third area 63. The display content of the first area 61 is the same as that of the first area 51 of the first operation screen 50. On the other hand, the display contents of the second area 62 and the third area 63 are different from those of the first operation screen 50. In the second area 62 of the second operation screen 60, a cancel button 621 and an OK button 622 for inputting whether to confirm or cancel the setting input on the second operation screen 60 are arranged.

  A detailed setting input screen 64 is displayed in the third area 63. The detailed setting input screen 64 includes a scroll bar 65 extending in the first direction F1 and a plurality of buttons arranged in the screen vertical direction F on the left side of the scroll bar 65. The plurality of buttons are a group of buttons (buttons 631, 632, 633) for setting the number of pages to be printed on one sheet (multi-page setting), and an allocation setting for printing a plurality of pages (Layout Order / A button group (buttons 641 and 642) for performing layout order setting and a button group (button 651...) For setting the orientation of the paper (Orientation) are included. Note that the GUI components displayed on the detailed setting input screen 64 are not limited to these, and may include buttons for setting other setting items.

  On the second operation screen 60, the detailed setting input screen 64 is scrolled to move the display range. In FIGS. 3 and 4, a multi-page setting button group (buttons 631, 632, 633) arranged at the top of the detailed setting input screen 64 is displayed. Hereinafter, the display screens of FIGS. 3 and 4 are referred to as a multi-page selection screen 64A. When the multi-page selection screen 64A is displayed, part of the buttons used for layout order setting are also displayed. In the example of FIGS. 3 and 4, a part of the button 641 is displayed at the lower end of the multi-page selection screen 64A. FIG. 3 shows a state where the “Single Page (1 page / sheet)” button 631 is selected. On the other hand, FIG. 4 shows a state in which the “2-up (2 pages / sheet)” button 632 is touched and the setting is changed to “2-up (2 pages / sheet)”.

  The control unit 30 changes the display mode of the buttons arranged on the operation screen according to the setting state at that time. For example, on the detailed setting input screen 64, a button that has an exclusive relationship with the current setting, in other words, a button that is prohibited from being operated (selected) in the current setting is grayed out and displayed. Therefore, the control unit 30 determines whether or not the operation is prohibited for each of the buttons arranged on the detailed setting input screen 64. If the operation is prohibited, the control unit 30 displays the button in gray out.

  For example, as illustrated in FIGS. 3 and 4, the control unit 30 changes the display mode of the layout order setting button group (buttons 641 and 642) according to the setting state of the multi-page setting. Specifically, as shown in FIG. 3, when the “Single Page (1 page / sheet)” button 631 is selected, the layout order selection (assignment setting) cannot be selected (that is, the operation is prohibited). Therefore, the button 641 surrounded by a broken line is grayed out and displayed.

  On the other hand, as shown in FIG. 4, when the “2-up (2 pages / sheet)” button 632 is selected, layout order selection (allocation setting) can be set. Accordingly, the button 641 is displayed in a normal display mode without being grayed out. Here, when the “2-up (2 pages / sheet)” button 632 is selected as shown in FIG. 4, the layout order selection is “Left → Right / Top” as shown in FIGS. The button 641 of “→ Bottom” is switched to the selected state. For example, such processing is performed when the initial setting of layout order selection is set to “Left → Right / Top → Bottom”.

  When the detailed setting input screen 64 is scrolled downward after the multi-page setting, a layout order selection screen 64B is displayed as shown in FIG. Buttons 641 and 642 for selecting a layout order are displayed on the layout order selection screen 64B. A button 641 is a button for setting the order of “Left → Right / Top → Bottom”, and a button 642 is a button for setting “Right → Left / Bottom → Top”. When the “2-up (2 pages / sheet)” button 632 is selected, the user can select either the button 641 or the button 642 as layout order selection (assignment setting). The layout order selection screen 64B also displays a part of buttons for setting the paper orientation (Orientation). In the example of FIG. 5, a button 651 is displayed at the lower end of the layout order selection screen 64B. Also on the layout order selection screen 64B, the control unit 30 cannot select a button for selecting a setting that has an exclusive relationship with the setting state of the already set multi-page setting and layout order selection (that is, the operation is prohibited). Button is grayed out. Specifically, as shown in FIG. 5, in the setting state in which the “Left → Right / Top → Bottom” button 641 is selected, the paper orientation cannot be set. Accordingly, the button 651 surrounded by a broken line is displayed in gray. Hereinafter, a button displayed in gray out is referred to as a gray out button.

(Error display when grayout button is touched)
When the grayout button (for example, the button 641 in FIG. 3 or the button 651 in FIG. 5) is touched by the user, the control unit 30 performs an error display explaining that the button cannot be selected. Hereinafter, a specific mode of error display and an example of control for performing error display will be described. FIG. 6 is an explanatory diagram of an error display when the grayout button is touched, and shows an example when the button 651 of FIG. 5 is touched. FIG. 7 is a flowchart of touch detection and error display.

  As illustrated in FIG. 6, the control unit 30 is touched when a first part, that is, a grayout button (button 651) that is one of a plurality of GUI parts displayed on the touch panel 2 is touched. The button 651 and the error display window 70 are simultaneously displayed on the display screen. The error display window 70 displays information related to the operation prohibition of the touched button 651 (gray-out button), for example, the reason why the button 651 cannot be operated and a solution method. When this error display is performed, the grayed out display of the touched button 651 is canceled and highlighted, and the error display window 70 is also highlighted. Then, the background area 80 excluding the highlighted button 651 and the error display window 70 is displayed in gray out. That is, the background area 80 is masked with dark gray.

  Hereinafter, touch detection and error display control will be described with reference to FIG. As illustrated in FIG. 7, when the control unit 30 detects that a button has been touched by the user (step ST1), the determination unit determines whether or not the touched button is a button that can be operated with the current settings. (Step ST2) is performed. In step ST2, if the touched button is not a gray-out button, it is determined that it can be operated (step ST2: Yes). In this case, a touch operation acceptance process is performed (step ST10). For example, the touched button is highlighted and changed to a setting associated with the touched button. On the other hand, when the touched button is a gray-out button in step ST2, it is determined that this button is not operable, in other words, the operation is prohibited (step ST2: No). Accordingly, the process proceeds to step ST3.

  Steps ST3 to ST7 are error display steps. In step ST3, the background area 80 of the operation screen is masked with dark gray. Here, the background area 80 is an area excluding the touched button 651 and the error display window 70. Next, in step ST4, the touched button 651 (that is, the gray-out button) is canceled and highlighted. Subsequently, in step ST5, it is determined whether there is an empty space in which the error display window 70 can be arranged under the touched button 651. When there is no empty space (step ST5: No), the process proceeds to step ST6, and the touched button is slid in the first direction F1 (upper screen in the example of FIG. 6). Then, the process proceeds to step ST7, and the error display window 70 is slid into the newly created empty space below the touched button 651. Alternatively, if there is an empty space from the beginning under the touched button 651 (step ST5: Yes), the process proceeds from step ST5 to step ST7 without performing step ST6, and exists below the touched button 651. The error display window 70 is slid into the empty space. 5 is switched to the error display screen shown in FIG.

  The movement of the button 651 (step ST6) and the slide-in of the error display window 70 (step ST7) may be performed simultaneously, or the error display window 70 may be slid in after the movement of the button 651 is completed. . The background area 80 may be grayed out or the button 651 may be highlighted at any timing of steps ST3 to ST7.

  When the error display screen of FIG. 6 is displayed, the control unit 30 determines whether or not a certain time has elapsed (step ST8). If the error has elapsed, the control unit 30 ends the error display and immediately before the grayout button is touched. 3 is the operation screen of FIG. 3 when the button 641 of FIG. 3 is touched in ST1, and the operation screen of FIG. 5 when the button 651 of FIG. 5 is touched in ST1. (Step ST9: return step). Alternatively, an OK button is displayed on the error display window 70, and it is determined in step ST8 whether or not the OK button has been touched. If the OK button has been touched, the error display can be terminated. By terminating the error display and returning to the operation screen immediately before the grayout button is touched, the setting input performed before the error display is displayed can be continued.

(Main effects of this embodiment)
As described above, in the image display device 1 of this embodiment, the grayout button (button 651) that is a GUI component (first component) that is prohibited from being displayed is displayed on the display screen of the operation panel 3, and the button 651 is displayed. When touched, the button 651 and the error display window 70 are simultaneously displayed on the display screen. In this way, the GUI component (gray-out button) that causes the error display window 70 to be displayed can be simultaneously viewed by the user while the error display window 70 is displayed. Therefore, the user can easily understand the cause of the error display.

  In this embodiment, the display position of the touched button 651 is changed to create an empty space at the position where the button 651 was initially displayed, and the error display window 70 is displayed in this empty space. Thereby, the touched button 651 and the error display window 70 can be simultaneously displayed on the display screen. In this embodiment, the touched button 651 is slid in the first direction F1 at the top of the screen to change the display position, and the error display window is slid in the same direction as the direction in which the button 651 has moved. Thus, if the direction in which the touched button 651 is moved and the direction in which the error display window is slid in are the same direction (first direction F1), it is intuitive that the moving button 651 is the cause of the error display. Easily recognized. Therefore, the user can easily understand the cause of the error display.

  In this embodiment, the gray-out display of the button 651 causing the error display is canceled and highlighted, and the background area excluding the highlighted button 651 and the error display window 70 is gray-out displayed. Thereby, the error display and the button 651 causing the error display can be made conspicuous in the display screen. Therefore, it is easy to intuitively recognize that the button 651 is the cause of the error display. Therefore, the user can easily understand the cause of the error display.

(Modification)
(1) In the above embodiment, only the button 651 that caused the error display is slid in the first direction F1 at the top of the screen to display the error. , Buttons 631, 632, 633, 641, 642, 651,... Are arranged in a line, and one of them is the button 651 that caused an error display. Accordingly, in step ST6, not only the button 651 that is grayed out is slid, but also all or part of the plurality of buttons can be scroll-displayed in the first direction F1 that is the arrangement direction. In this way, since the positional relationship between the button 651 causing the error display and the other buttons is maintained, the user can easily determine what the button 651 causing the error display is. I can understand.

(2) In the above embodiment, since the button 651 that caused the error display is displayed at the lower end of the operation screen, the direction in which the button 651 is slid (first direction F1) is the top of the screen. The moving direction and the direction in which the error display window 70 is slid in may be other directions. For example, it may be slid toward the bottom of the screen, or may be slid in the left-right direction.

(3) In the above embodiment, the GUI component causing the error display is a button, but GUI components other than the button (for example, a window, a check box, a tab, etc.) can be displayed in gray. Even in such a case, the same error display as described above can be performed. For example, the grayed out window can be slid and displayed side by side with the error display window.

(4) In the above embodiment, the direction in which the error display window 70 slides in in step ST7 matches the direction in which the button 651 slides in step ST6, but it does not have to match. For example, the button 651 may slide upward and the error display window 70 may slide in from the left or right side.

(Other embodiments)
In the above embodiment, the present invention is applied to the image display apparatus 1 that is a multifunction peripheral. However, the present invention can be applied to various image display apparatuses including the operation panel 3. For example, the present invention can be applied to a single-function printer having only a printing function or a single-function scanner device having only a scanner function. In addition, the present invention can be applied to a computer device or a tablet terminal provided with a touch panel. For example, a tablet-type operation terminal can be configured separately from a printer or a multifunction peripheral, and can be operated by communicating between the operation terminal and the printer or multifunction peripheral. Further, the image display unit may not be a touch panel, and may be an input to an operation screen displayed on the image display unit using an input device such as a mouse or a touch pad.

DESCRIPTION OF SYMBOLS 1 ... Image display apparatus, 2 ... Touch panel, 3 ... Operation panel, 4 ... Image display part, 5 ... Position input part, 10 ... Printing mechanism, 20 ... Scanner unit, 30 ... Control part, 40 ... Interface part, 50 ... 1st 1 operation screen 51 ... 1st area 52 ... 2nd area 53 ... 3rd area 54 ... Detailed setting menu screen 55 ... Scroll bar 60 ... 2nd operation screen 61 ... 1st area 62 ... 1st 2 area, 63 ... 3rd area, 64 ... detailed setting input screen, 64A ... multi-page selection screen, 64B ... layout order selection screen, 65 ... scroll bar, 70 ... error display window, 80 ... background area, 511, 512, 513, 514 ... button, 541, 542, 543, 544 ... button, 621 ... cancel button, 622 ... OK button, 631, 632, 633 ... button, 64 , 642 ... button, 651 ... button, F ... vertical direction of the screen, F1 ... first direction, T1 ... first tab, T2 ... second tab.

Claims (11)

An image display unit, and a control unit that displays an operation screen on the image display unit,
The control unit operates the first component and the first component in response to the operation of the first component while the operation of the first component displayed on the image display unit is prohibited. An image display device, wherein an error display relating to prohibition is simultaneously displayed on the image display unit.   The image display device according to claim 1, wherein the image display unit is provided on a touch panel.   The control unit changes the display position of the first part on the operation screen in response to the operation of the first part in a state where the operation of the first part is prohibited, and sets the display position. The image display device according to claim 1, wherein the error display is displayed at a position where the first part is displayed before the change. The first component is one of a plurality of buttons arranged in a first direction;
The control unit causes the plurality of buttons to be scroll-displayed in the first direction in response to the operation of the first component while the operation of the first component is prohibited, and the operation screen. The image display device according to claim 3, wherein the error display is slid in the first direction.   The control unit displays the first part in a grayed out state when the operation of the first part is prohibited, and the first part is operated while the operation of the first part is prohibited. 5. The display according to claim 1, wherein the gray-out display of the first part is canceled and the parts other than the first part and the error display are grayed-out and displayed. Image display device.   6. The control unit according to claim 3, wherein when the error display is ended, the control unit returns to the display immediately before the operation of the first part while the operation of the first part is prohibited. The image display device according to any one of the above. A determination step of determining whether or not the operation of the first component is prohibited when the first component displayed on the image display unit is operated;
An error display step of simultaneously displaying the first component and an error display relating to the operation prohibition of the first component on the image display unit when it is determined that the operation of the first component is prohibited. An error display method characterized by that.   In the error display step, the display position of the first part on the operation screen displayed on the image display unit is changed, and the error display is performed at the position where the first part was displayed before the display position is changed. The error display method according to claim 7, wherein: The first component is one of a plurality of buttons arranged in a first direction;
9. The error according to claim 8, wherein in the error display step, the plurality of buttons are scroll-displayed in the first direction, and the error display is slid in the first direction on the operation screen. Display method. It is determined whether the operation of the first part is prohibited, and when the operation is prohibited, the first part is grayed out and displayed.
In the error display step, in response to the operation of the first component in a state where the operation of the first component is prohibited, the gray-out display of the first component is canceled, and the first component and The error display method according to any one of claims 7 to 9, wherein a display other than the error display is grayed out and displayed.   11. The step of returning to the display immediately before the first part is operated in a state where the operation of the first part is prohibited when the error display is ended is further performed. The error display method according to any one of the above.