Ink jet printer

Abstract

To improve the operability of a display screen.SOLUTION: An ink jet printer can execute a plurality of functions including at least a printing function to print image data on a recording medium and a reading function to read a document, and comprises: a display; and display control means that switches between a first home screen including a button for instructing execution of the printing function and a button for instructing execution of the reading function, and a second home screen including a button for instructing execution of the printing function and a button for instructing execution of a double-sided printing function, and displays the home screen on the display. When the power of the ink jet printer is shifted to an off state and subsequently the power is shifted to an on state, with the first home screen being displayed on the display, the display control means displays the first home screen on the display, and when the power of the ink jet printer is shifted to the off state and subsequently the power is shifted to the on state, with the second home screen being displayed on the display, displays the second home screen on the display.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a technique for controlling a display screen. [Background technology]

[0002] Patent Document 1 discloses a display control device that displays a tabbed screen. The display control device displays a shared tab in general mode when no registered users are logged in, and displays a shared tab and a personal tab corresponding to the logged-in user in personal mode when a registered user is logged in. One of the tabs can be set as the main tab, and the main tab is initially selected and displayed on the screen after operation in general mode begins. However, if the personal tab is set as the main tab, the shared tab is selected. The personal tab is also managed so that it can be opened by password authentication or card authentication. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-52973 Summary of the Invention [Problem to be solved by the invention]

[0004] However, after starting up the device, some users may switch from the main tab to operate the tab they were using before shutting down the device, which may impair operability.

[0005] Therefore, an object of the present disclosure is to improve the operability of a display screen. [Means for solving the problem]

[0006] An inkjet printer according to one embodiment of the present disclosure is an inkjet printer capable of performing multiple functions including at least a printing function for printing image data on a recording medium and a reading function for reading a document, and is equipped with a display unit and a display control means capable of switching between a first home screen including a button for instructing the execution of the printing function and a button for instructing the execution of the reading function, and a second home screen including a button for instructing the execution of the printing function and a button for instructing the execution of a double-sided printing function, and displaying them on the display unit.The display control means is characterized in that when the inkjet printer is turned off while the first home screen is displayed on the display unit and then turned on, it displays the first home screen on the display unit, and when the inkjet printer is turned off while the second home screen is displayed on the display unit and then turned on, it displays the second home screen on the display unit. [Effects of the Invention]

[0007] According to the present disclosure, the operability of the display screen can be improved. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram of an MFP. [Figure 2] FIG. 2 is a diagram showing a standard home screen displayed on the operation display unit. [Figure 3] FIG. 10 is a diagram showing a custom home screen displayed on the operation display unit. [Figure 4] FIG. 10 is a diagram showing a custom home lock screen displayed on the operation display unit. [Figure 5] FIG. 10 is a diagram showing a custom home screen displayed on the operation display unit after unlocking. [Figure 6] 10 is a flowchart illustrating a sequence for unlocking a custom home screen. [Figure 7]10 is a flowchart showing a sequence for locking a custom home screen by a tab operation. [Figure 8] 10 is a flowchart showing a screen transition sequence when the backlight is off. [Figure 9] 10 is a flowchart illustrating a custom home screen lock sequence when the backlight is off. [Figure 10] 10 is a flowchart showing a tab switching sequence. [Figure 11] 10 is a flowchart showing a screen display sequence during soft-on. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the present invention, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the present invention. Note that the same components will be described with the same reference numerals.

[0010] <<Embodiment 1>> <Block diagram> FIG. 1 is a block diagram showing an example of the schematic configuration of an MFP 100 according to this embodiment. The MFP 100 is a type of information processing device. The MFP 100 is also a type of electronic device. The MFP 100 according to this embodiment has information processing functions such as generating, storing, and transmitting device information including log information and status information. It also has an image forming function that forms an image on a recording medium using a recording control unit 113 and a recording unit 114, which will be described later.

[0011] The MFP 100 includes a CPU 101, a ROM 102, a RAM 103, an image memory 104, a data conversion unit 105, a reading control unit 106, a reading unit 107, an operation display unit 108, an LCD 109, a communication control unit 110, and a resolution conversion unit 111. The MFP 100 also includes an encoding / decoding unit 112, a recording control unit 113, a recording unit 114, a USB function control unit 115, a USB host control unit 116, and a bus 117.

[0012] The CPU 101 is a system control unit that controls the entire MFP 100. The ROM 102 is a non-volatile memory that stores fixed data such as control programs executed by the CPU 101, data tables, and an embedded operating system (OS). In this embodiment, each control program stored in the ROM 102 performs software execution control, such as scheduling, task switching, and interrupt processing, under the management of the embedded OS stored in the ROM 102. The ROM 102 stores information indicating a permission status, which indicates whether device information is to be provided to an external device. The RAM 103 is composed of a static random access memory (SRAM) that requires a backup power source, and power supply to the RAM 103 is guaranteed by a primary battery (not shown) for data backup. The RAM 103 stores program control variables and the like. The image memory 104 is composed of a dynamic random access memory (DRAM) or the like and can store image data. A portion of the image memory 104 is reserved as a work area for executing software processing. The data conversion unit 105 can convert image data, such as analyzing a page description language (PDL) or converting character data into computer graphics (CG).

[0013] The reading unit 107 optically reads the document using a CIS image sensor and converts it into an electrical image signal. The reading control unit 106 performs various image processing such as binarization or halftoning on this image signal, and outputs high-resolution image data. The method for optically reading the document may be either a sheet reading control method in which the document is read by a fixed CIS image sensor, or a book reading control method in which the document fixed on a document table is read by a moving CIS image sensor.

[0014] The operation display unit 108 is composed of the minimum necessary keys, such as numeric input keys, mode setting keys, a decision key, and a cancel key, as well as an LED (light-emitting diode) or a 7-segment display unit. The above various keys are realized as so-called soft keys displayed on the LCD 109, and can accept operations from the user. If no user operations are performed on the LCD 109 for a certain period of time, the LCD 109 switches off its backlight (backlight function) to reduce power consumption.

[0015] The communication control unit 110 controls communication between the MFP 100 and the communication network 300, and performs connection to an Internet service provider or communication of various data with the service management server 200. The communication control unit 110 can also determine whether the MFP 100 is connected to the Internet or only to a LAN. The connection between the communication control unit 110 and the communication network 300 is established using a known method such as HTTP or XMPP. The resolution conversion unit 111 performs resolution conversion processing such as mutual conversion between millimeter-based image data and inch-based image data. The resolution conversion unit 111 can also perform scaling of image data.

[0016] The encoding / decoding unit 112 performs encoding / decoding processing and scaling processing on image data (uncompressed, MH, MR, MMR, JBIG, JPEG, etc.) handled by the MFP 100. The recording control unit 113 performs various image processing such as smoothing, recording density correction, and color correction on the image data to be printed, converting it into high-definition image data, and outputs it to the recording unit 114. The recording control unit 113 also plays a role in periodically acquiring status information data of the recording unit 114. The recording unit 114 is configured by a laser beam printer, an inkjet printer, or the like, and prints the image data generated by the recording control unit 113 on a recording medium such as paper.

[0017] The USB function controller 115 performs protocol control in accordance with the USB communication standard. The USB host controller 116 is a controller for performing communication using the protocol defined by the USB communication standard. This USB communication standard is a standard for two-way high-speed data communication, and this USB communication standard stipulates that multiple hubs or functions (slaves) can be connected to one host (master). In other words, the USB host controller 116 provides the host function in USB communication. The components other than the reading unit 107 and LCD 109 are connected to each other via a bus 117.

[0018] <Operation display section> The operation display unit 108 according to this embodiment has a tab-format screen.

[0019] FIG. 2 is a diagram showing a standard home screen displayed on the operation display unit 108. Tab 201 corresponds to the standard home screen. Tabs 202, 203, and 204 correspond to custom home screens (custom tabs). Hereinafter, the term "tab" may also refer to a menu screen corresponding to the tab. The user can switch home screens by pressing a tab. Also, by changing the color of tab 201 from the colors of the other tabs, it is indicated that the screen of the currently displayed tab (current tab) 201 (i.e., the standard home screen) is being displayed. The standard home screen has a copy menu button 205, a scan menu button 206, a print menu button 207, a LAN button 208, a wireless connect button 209, a settings button 210, and a hint button 211. When the user presses each button, the screen transitions to the screen corresponding to that button. Specifically, for example, when the copy menu button 205 is pressed, an area for inputting copy settings and a screen for instructing execution of a copy are displayed. Unlike the custom home screen described below, the standard home screen displays predetermined buttons without the user having to select them. However, this is not limited to this format. The buttons displayed on the standard home screen may also be selectable or changeable by the user.

[0020] FIG. 3 illustrates a custom home screen for tab 202 displayed on the operation display unit 108. The color of tab 202 is different from the colors of the other tabs to indicate that the custom home screen for tab 202 is currently displayed. The custom home screen for tab 202 includes custom menus (screens) 305, 306, and 307, each of which can be customized by the user. The user can specify the function to display in each menu position. In this figure, custom menu 305 is set to "Standard Copy," custom menu 306 is set to "Double-Sided Copy," and custom menu 307 is set to "Save Original to PC." Double-sided copying refers to copying using a double-sided printing function that prints on both the front and back of a recording medium. Unlike the standard home screen, the custom home screen allows users to register menus associated with the settings for processes executed from each menu. For example, when copying from the copy menu button 205, whether the copy is a double-sided or single-sided copy must be separately set after pressing the copy menu button 205. However, when copying is performed from the custom menu 306, there is no need to separately set whether the copy is a double-sided copy or a single-sided copy after pressing the custom menu 306. Login information and cookie information may also be associated and saved for each home screen. A lock can also be set for each custom home screen. In this embodiment, locking refers to control that prevents the custom home screen from being displayed unless the correct password is entered into a password (authentication information) entry screen. For a custom home screen that is not locked, when the tab corresponding to that custom home screen is operated, the custom home screen is displayed without displaying the password entry screen. Custom menu settings and lock settings for a custom home screen can be performed using the settings button 210 in FIG. 2.

[0021] FIG. 4 is a diagram showing a lock screen for tab 202 displayed on operation display unit 108. When a user selects tab 202, which is a tab corresponding to a custom home screen that is under lock control, the custom home screen is not displayed, and the screen shown in FIG. 4 is displayed. When the user presses unlock button 401, a password entry screen is displayed, and if the entered password matches the correct password, the custom home screen for tab 202 is displayed. Note that the correct password is set for each tab. In this embodiment, the locked state is a state in which user operations on the menu screen corresponding to the selected tab (target tab) are restricted. For example, as shown in FIG. 4, this is a state in which the menu screen corresponding to the selected tab is not displayed. Alternatively, the menu screen corresponding to the selected tab may be displayed, but the displayed content cannot be changed.

[0022] In this embodiment, if tab 202 is pressed again after displaying the menu of another tab from the custom home screen of the currently displayed tab 202, the lock screen is not displayed and the custom home screen of tab 202 is displayed without the user having to enter a password.

[0023] 5 shows a custom home screen in an unlocked state (unlocking) displayed on the operation display unit 108. An unlocked icon 501 indicates that the lock setting for the custom home screen corresponding to the currently displayed tab 202 has been released.

[0024] In this embodiment, the user can lock a tab by pressing the unlocked icon (i.e., tab 202 in this figure). Note that the unlocked icon 501 is not displayed on tabs for which the lock setting is disabled, and no processing is performed even if the tab of the currently displayed custom home screen is pressed. Note that it is assumed that the setting of whether to enable or disable the tab lock setting is configured in advance for each tab. The setting of whether to enable or disable the tab lock setting may be configured to be performed, for example, from the settings button 210.

[0025] <Flowchart> FIG. 6 is a flowchart illustrating the unlock sequence of this embodiment. The flow of processing for a user to unlock a tab will be described using this diagram. The series of processes shown in this flowchart is performed by CPU 101 of MFP 100 by loading program code stored in ROM 102 into RAM 103 and executing it. Note that "S" in the following process descriptions indicates a step in the flowchart, and this also applies to subsequent embodiments. This process is executed when the user presses a tab on the custom home screen. This process also starts when operation display unit 108 detects a user operation, such as a touch.

[0026] First, in S601, CPU 101 detects the tab pressed by the user. In S602, CPU 101 determines whether the tab lock flag is ON. A tab lock flag is prepared individually for each tab, and is turned ON when the tab is locked. Details regarding the tab lock operation will be described later. If the lock flag is OFF, CPU 101 displays the tab menu in S607. Note that the lock flag of a tab for which the lock setting is disabled is always OFF. As explained above, it is assumed that the setting of whether to enable or disable the tab lock setting is set in advance for each tab.

[0027] If the lock flag is ON, in S603 the CPU 101 displays a lock screen such as that shown in Fig. 4. When the CPU 101 detects a password input by the user in S604, it determines whether the password matches in S605. If the password does not match, the lock screen is displayed again in S603. If the password matches, the lock flag is set to OFF in S606, and then the tab menu is displayed in S607.

[0028] If the user switches to another tab in S608, the CPU 101 maintains the OFF state of the lock flag for the tab before the switch, for which the lock flag was set OFF in S606. As a result, when another tab press is detected in S601, the lock flag is determined to be OFF in S602, and the user can display the tab menu without entering a password. This completes the processing flow for unlocking a tab.

[0029] Next, the process when the user locks a tab will be described.

[0030] 7 is a flowchart for explaining the processing sequence when a user locks a tab. The series of processes shown in this flowchart is performed by CPU 101 of MFP 100 by loading program code stored in ROM 102 into RAM 103 and executing it. This process starts when the tab is unlocked by a user's unlocking operation such as password authentication.

[0031] In S701, the CPU 101 displays a menu for a predetermined tab on the operation and display unit 108. In S702, the CPU 101 determines whether pressing of the tab currently displaying the menu on the operation and display unit 108 has been detected. In this step, if the CPU 101 determines that pressing of the tab has not been detected before a predetermined time has elapsed, for example, the CPU 101 terminates the processing of this flowchart. On the other hand, if the CPU 101 determines that pressing of the tab has been detected within the time period, the CPU 101 determines in S703 whether the lock setting for the tab is enabled. As described above, it is assumed that the setting of whether to enable or disable the tab lock setting is set in advance for each tab. If the lock setting for the tab is disabled, the processing terminates. If the tab lock setting is enabled, a lock confirmation screen is displayed in S704. The lock confirmation screen is, for example, display screen 850 in FIG. 8. On the other hand, on the lock confirmation screen, the user selects whether to lock the tab. If the CPU 101 detects a user operation to select not to lock the tab on the lock confirmation screen, the CPU 101 returns the processing to S701. If a lock selection is detected in S705, the CPU 101 sets the lock flag to ON in S706, displays a locked screen in S707, and then ends the processing of this flowchart. The above is the flow of processing when a tab is locked by the user.

[0032] Next, a description will be given of screen transitions when the backlight of operation display unit 108 is off. The backlight of operation display unit 108 is turned on when a user operates operation display unit 108 to display a screen, or when MFP 100 is powered on and a screen is displayed on operation display unit 108. If no user operation is detected for a certain period of time while the backlight is on, the backlight is turned off to reduce power consumption. In other words, a state in which the backlight is on means a state in which a screen is displayed on operation display unit 108, and a state in which the backlight is off means a state in which no screen is displayed on operation display unit 108 and a power-saving state is achieved.

[0033] 8 is a flowchart showing the screen transition when the backlight is off. The series of processes shown in this flowchart are performed by CPU 101 of MFP 100 by loading program code stored in ROM 102 into RAM 103 and executing it.

[0034] First, in S801, CPU 101 detects expiration of a backlight-off timer. That is, CPU 101 starts a backlight-off timer to count the elapsed time since there was no user operation on operation display unit 108, in order to turn off the backlight after a predetermined time has elapsed. CPU 101 detects that the predetermined time has elapsed in S801. It is assumed that the set time of the timer is set in advance by the user.

[0035] In S802, CPU 101 acquires the lock setting for the current tab. The current tab here refers to the tab currently being displayed, and in the backlight-off state, refers to the tab that was last displayed before the backlight was turned off. Note that the condition for turning off the backlight is met when a predetermined time has elapsed since there was no user operation on operation display unit 108 (i.e., when a predetermined time has elapsed since the backlight-off timer was started).

[0036] In S803, CPU 101 determines whether the lock setting for the current tab is enabled. If it is determined that the lock setting for the current tab is enabled, in S804 CPU 101 executes lock control to set the lock setting for the current tab to a locked state and transitions the display screen to a locked screen for the current tab. Thereafter, in S805, the backlight is turned off and the processing of this flowchart ends. Note that the processing of S804 can also be performed when the backlight is on. That is, even if the lock setting for the current tab is enabled in S803, the backlight is turned off without going through S804. Thereafter, when the backlight is on, the display control may be controlled to display a locked screen for the current tab for tabs for which the lock setting is enabled. That is, the locked screen may be displayed when the backlight is off or when the backlight is on.

[0037] If the CPU 101 determines in S803 that the current tab lock setting is invalid, the CPU 101 turns off the backlight in S805, and then ends the processing of this flowchart.

[0038] As described above, when the backlight is turned off on a screen in a hierarchy below a tab for which the lock setting is enabled through the processing of the flowchart in Fig. 8, a locked screen is displayed on the operation and display unit 108 when the backlight is turned on. On the other hand, when the backlight is turned off on a screen in a hierarchy below a tab for which the lock setting is disabled, the screen that was displayed before the backlight was turned off is displayed on the operation and display unit 108 when the backlight is turned on. This ensures security when the backlight is turned off for the current tab for which the lock setting is enabled. Note that the processing of the flowchart in Fig. 8 is performed on the currently displayed current tab, and therefore tab lock is not applied to other tabs, ensuring operability.

[0039] Next, a method for locking all the tabs for which the lock setting is enabled when the CPU 101 turns off the backlight of the operation display unit 108 will be described.

[0040] 9 is a flowchart for explaining the lock processing sequence when the backlight is off. The series of processes shown in this flowchart is performed by CPU 101 of MFP 100 by loading program code stored in ROM 102 into RAM 103 and executing it.

[0041] When the CPU 101 detects expiration of the backlight off timer in S901, the CPU 101 initializes index i to 1 in S902. In S903, the CPU 101 determines whether index i is less than or equal to the number of custom tabs. If index i is less than or equal to the number of custom tabs in S903, the CPU 101 determines whether the lock setting for the i-th custom tab is enabled in S904. If the lock setting for the i-th custom tab is enabled, the CPU 101 sets the lock flag for the i-th custom tab to ON in S905.

[0042] If the lock setting for the ith custom tab is disabled in S904, or after the lock flag for the ith custom tab is set to ON in S905, the CPU 101 increments index i by 1 in S906. After performing S906, the CPU 101 again determines whether index i is equal to or less than the number of custom tabs in S903. If index i is greater than the number of tabs in S903, the CPU 101 terminates the processing of this flowchart. This allows tabs to be locked in ascending order of tab number until index i becomes equal to the number of custom tabs. In other words, all tabs with enabled lock settings can be locked when the backlight is turned off. This processing allows tabs that should be locked to be locked after a certain period of time has elapsed, even if the user forgets to perform an operation such as logging out after completing operations. This provides improved security compared to the processing of locking only the current tab described in FIG. 8.

[0043] Next, the tab switching process of this embodiment will be described with reference to Figures 10 and 11. In the tab switching process of this embodiment, when MFP 100 is soft-on (MFP 100 is started in response to a power-on operation), instead of displaying a menu screen of the standard tab, the tab that was last displayed the last time the MFP was used is displayed. Hereinafter, the tab that was last displayed will also be referred to as the target tab. In the following description of tab switching, a display screen having four tabs, the standard tab, tab 1, tab 2, and tab 3, as shown in Figure 2 will be described.

[0044] 10 is a flowchart illustrating a tab switching sequence. The series of processes shown in this flowchart are performed by CPU 101 of MFP 100 by loading program code stored in ROM 102 into RAM 103 and executing it.

[0045] In S1001, CPU 101 detects a tab change. In S1002, CPU 101 saves the tab after the change in non-volatile memory. The tab saved in this process is called the current tab. Thereafter, in S1003, a menu corresponding to the tab after the change is displayed, and CPU 101 ends the process of this flowchart. For example, if the tab after the change is tab 2, CPU 101 displays a menu screen corresponding to tab 2 on operation display unit 108 in S1003.

[0046] 11 is a flowchart illustrating the screen display sequence during soft-on. The series of processes shown in this flowchart are performed by CPU 101 of MFP 100 by loading program code stored in ROM 102 into RAM 103 and executing it. This process begins when the power button is pressed while the power is off (power-off state).

[0047] In S1101, CPU 101 executes soft-on processing. That is, CPU 101 powers on and starts up MFP 100. Next, in S1102, CPU 101 acquires the current tab saved in non-volatile memory in S1002 of FIG.

[0048] In S1103, CPU 101 determines whether the current tab is a standard tab or a custom tab. If the current tab is a standard tab (if determined as YES in S1103), CPU 101 displays a menu for the standard tab on operation and display unit 108 in S1104, and ends the processing of this flowchart. If the current tab is not a standard tab (if determined as NO in S1103), CPU 101 determines in S1105 whether the current tab is tab 1. If the current tab is tab 1 (if determined as YES in S1105), CPU 101 displays a menu screen for tab 1 on operation and display unit 108 in S1106, and ends the processing of this flowchart. If the current tab is not tab 1 (if determined as NO in S1105), CPU 101 determines in S1107 whether the current tab is tab 2. If the current tab is tab 2 (if determined as YES in S1107), CPU 101 displays the menu for tab 2 on operation and display unit 108 in S1108. Thereafter, the processing of this flowchart ends. If the current tab is not tab 2 (if determined as NO in S1107), CPU 101 determines in S1109 whether the current tab is tab 3. If the current tab is tab 3 (if determined as YES in S1109), CPU 101 displays the menu for tab 3 on operation and display unit 108 in S1110, and ends the processing of this flowchart. If the current tab is not tab 3 (if determined as NO in S1109), CPU 101 ends the processing of this flowchart. Through such processing, the tab that was displayed the last time MFP 100 was powered off can be displayed when MFP 100 is powered on.

[0049] 11, if the lock setting for the tab is enabled, the menu screen corresponding to the tab is set to a locked state and the locked state screen is displayed. Then, when the correct password is entered by the user, CPU 101 displays the menu screen for the tab.

[0050] 10 and 11, the security of the display screen can be improved. Specifically, when the condition for turning off the backlight of operation display unit 108 of MFP 100 is met, the currently displayed tab can be controlled to be in a locked state based on whether or not a lock setting is in place.

[0051] <<Other embodiments>> In the above-described embodiment, the display screen of MFP 100 has been described as an example, but the present disclosure may be applied to any device having an operation display unit. For example, the above-described screens for setting MFP 100 or for causing MFP 100 to execute various processes may be displayed by MFP 100 on another device (such as a smartphone or PC) communicating with MFP 100. The present disclosure may be applied to the screen displayed on the other device.

[0052] The above-described embodiments can also be realized by executing the following process. That is, software (programs) that realize the functions of the above-described embodiments are supplied to a system or device via a network or various storage media, and a computer (CPU, MPU, etc.) of the system or device reads and executes the program. The program may be executed by a single computer, or may be executed by multiple computers in cooperation with each other. Furthermore, it is not necessary to realize all of the above-described processes by software; some or all of the processes may be realized by hardware such as an ASIC. Furthermore, the CPU is not limited to one that performs all processes by a single CPU, and multiple CPUs may perform processes in cooperation with each other as appropriate.

[0053] Furthermore, the functions of the above-described embodiments are not only realized by a computer reading and executing the program code, but also include cases where an operating system running on a computer performs some or all of the actual processing based on the instructions of the program code, thereby realizing the functions of the above-described embodiments.

[0054] The present disclosure also includes the following configurations.

[0055] (Configuration 1) An inkjet printer capable of performing multiple functions including at least a printing function for printing image data on a recording medium and a reading function for reading an original, A display unit; a display control means for switching between a first home screen including a button for instructing execution of the printing function and a button for instructing execution of the reading function and a second home screen including a button for instructing execution of the printing function and a button for instructing execution of the double-sided printing function and displaying the first home screen on the display unit; Equipped with The display control means displays the first home screen on the display unit when the inkjet printer is turned off while the first home screen is displayed on the display unit and then turned on, and displays the second home screen on the display unit when the inkjet printer is turned off while the second home screen is displayed on the display unit and then turned on. [Explanation of symbols]

[0056] 100 MFP 101 CPU 108 Operation display section

Claims

[Claim 1] An inkjet printer capable of performing multiple functions including at least a printing function for printing image data on a recording medium and a reading function for reading an original, A display unit; a display control means for switching between a first home screen including a button for instructing execution of the printing function and a button for instructing execution of the reading function and a second home screen including a button for instructing execution of the printing function and a button for instructing execution of the double-sided printing function and displaying the first home screen on the display unit; Equipped with The display control means displays the first home screen on the display unit when the inkjet printer is turned off while the first home screen is displayed on the display unit and then turned on, and displays the second home screen on the display unit when the inkjet printer is turned off while the second home screen is displayed on the display unit and then turned on.

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