JP5742314B2 - Image display system, image display apparatus, image display method, and computer program - Google Patents

Description

  The present invention relates to an image display system, an image display device, an image display method, and a computer program that perform various processes relating to a screen displayed on a display device.

  2. Description of the Related Art In recent years, a navigation device is often mounted on a vehicle that provides vehicle travel guidance so that a driver can easily arrive at a desired destination. Here, the navigation device detects the current position of the vehicle with a GPS receiver, etc., acquires map data corresponding to the current position through a recording medium such as a DVD-ROM or HDD or a network, and Can be displayed on the display device. In recent years, some cellular phones, PDAs (Personal Digital Assistants), personal computers, and the like have functions similar to those of the navigation device.

  Furthermore, in the navigation device or the like, various screens can be displayed on the display device in addition to a screen including a map image around the vehicle position (hereinafter referred to as a travel guidance screen). For example, a TV screen is displayed, a menu screen is displayed, or a facility search screen is displayed. And various control is performed when a user performs operation corresponding to the various screens displayed on the display apparatus.

  However, in the navigation device or the like, there are many cases where switching between screens is performed according to the traveling state of the vehicle. For example, when the TV screen is displayed on the display device in a state where the vehicle is stopped, when the vehicle starts to travel, the screen is automatically switched from the TV screen to the travel guidance screen. In addition, when a search screen for a facility or the like is displayed on the display device in a state where the vehicle is stopped, the operation of the search screen is restricted when the vehicle starts to travel. Will be switched manually. In such a case, in order to display the screen before the switching is performed again on the display device, a predetermined operation for displaying the screen (for example, when displaying a TV screen, a menu screen is displayed). And then selecting the TV mode from the menu screen and further selecting the channel) from the beginning. In addition, when characters or the like are being input at the time of switching the screen, it is necessary to input characters or the like having the same contents again. Therefore, for example, in Japanese Patent Application Laid-Open No. 2009-69015, when the screen is switched, the screen displayed on the display immediately before is automatically saved, and the screen saved based on the subsequent user operation is saved. It describes the technique of displaying on the display again.

JP 2009-69015 A (Pages 7 to 9, FIGS. 3 and 4)

  However, in the technique described in Patent Document 1, in order to display the stored screen again on the display, the user needs to perform a predetermined screen calling operation, which increases the user's operation burden. . On the other hand, if the saved screen is automatically redisplayed on the display, there is a problem that it is difficult to specify a situation where the user needs to redisplay the saved screen.

  The present invention has been made to solve the above-described conventional problems, and when a saved screen is redisplayed on the display device, the user needs to redisplay without imposing a large operation burden on the user. An object of the present invention is to provide an image display system, an image display device, an image display method, and a computer program that can be appropriately redisplayed in a situation in which the image is displayed.

In order to achieve the object, the image display system (1) according to claim 1 of the present application switches screens of a plurality of types (50, 70, 78, 81, 91) and displays them on the display device (15). (13), at least one or more storage conditions and restoration conditions are associated with each of the plurality of types of screens, and switching of the screen displayed on the display device is displayed on the display device immediately before the switching is performed. A screen storage unit that stores the screen displayed on the display device immediately before switching as a storage screen when the storage condition corresponding to the type of the screen that has been performed is satisfied. 13) and a return for determining whether or not the return condition corresponding to the type of the screen stored as the storage screen is satisfied after the storage screen is stored by the screen storage unit And a screen return means (13) for displaying the saved screen saved by the screen saving means on the display device when it is judged by the condition judging means (13) and the return condition judging means that the return condition is satisfied. And when the plurality of storage conditions are associated with one screen type, the return condition is associated with each of the plurality of storage conditions, and the return condition determination means includes: It is determined whether or not the return condition corresponding to the storage condition when the storage screen is stored is satisfied, and the screen recovery unit determines that there are a plurality of storage screens that satisfy the recovery condition. Is characterized in that, among the plurality of storage screens, a storage screen having the highest priority is displayed on the display device in accordance with a set priority .

Further, the image display system (1) according to claim 2 is the image display system according to claim 1, wherein for each of the plurality of types of screens, a correspondence relationship between the screen type, the storage condition, and the return condition. And determining whether or not the storage condition and the return condition are satisfied based on the table .

  An image display system (1) according to claim 3 is a deletion condition determination means (13) for determining whether or not a predetermined deletion condition is satisfied in the image display system according to claim 1 or 2, Screen deletion means (13) for deleting the saved screen saved by the screen saving means (13) when the return condition judging means (13) determines that the return condition is satisfied. Features.

  The image display system (1) according to claim 4 is the image display system according to claim 3, wherein the deletion condition is set for each of the plurality of types of screens (50, 70, 78, 81, 91). It is characterized by.

  The image display system (1) according to claim 5 is the image display system according to claim 4, wherein the route guidance screen (50) for performing route guidance from the departure point of the moving body to the destination is the deletion. As a condition, it is set that the mobile body has arrived at the destination.

  Further, in the image display system (1) according to claim 6, in the image display system according to claim 4, the facility search screen (91) for searching for a facility starts searching for a new facility as the deletion condition. It is set to do.

  Further, an image display system (1) according to claim 7 is the image display system according to any one of claims 1 to 6, wherein a current position acquisition unit (13) for acquiring a current position of the moving body; When the storage screen is a screen for displaying a map around the current position of the mobile object, the storage screen is displayed when the storage screen is displayed on the display device (15) by the screen return means (13). Screen updating means (13) for updating based on the current position of the moving body newly detected by the current position acquisition means.

The image display device (1) according to claim 8 includes screen display means (13) for switching a plurality of types of screens (50, 70, 78, 81, 91) to display on the display device (15). At least one or more storage conditions and return conditions are associated with each of the plurality of types of screens, and the type of screen displayed on the display device immediately before switching is displayed. A screen storage means (13) for storing a screen displayed on the display device immediately before switching as a storage screen when the storage conditions corresponding to the storage conditions are satisfied, and the screen Return condition determination means (13) for determining whether or not the return condition corresponding to the type of the screen saved as the save screen is satisfied after the save screen is saved by the save means; Screen return means (13) for displaying the saved screen saved by the screen saving means on the display device when it is judged by the return condition judging means that the return condition is satisfied. When the storage condition is associated with a plurality of types, the return condition is associated with each of the plurality of storage conditions, and the return condition determination unit is configured to store the storage screen when the storage screen is stored. It is determined whether or not the return condition corresponding to the storage condition is satisfied, and the screen return means, when it is determined that there are a plurality of the save screens satisfying the return condition, The storage screen having the highest priority is displayed on the display device in accordance with the set priority .

The image display method according to claim 9 is provided with a step in which the screen display means switches between a plurality of types of screens (50, 70, 78, 81, 91) and displays them on the display device (15). At least one or more storage conditions and return conditions are associated with each screen, and the screen storage means displays the screen displayed on the display device immediately before switching the screen displayed on the display device. A step of saving the screen displayed on the display device immediately before switching as a storage screen when the storage condition corresponding to the type is satisfied, and a return condition determination unit, Determining whether the return condition corresponding to the type of the screen stored as the storage screen is satisfied after the storage screen is stored by the screen storage unit And when the screen return means determines that the return condition is satisfied by the return condition determination means, displaying the saved screen saved by the screen saving means on the display device. When the plurality of storage conditions are associated with the type of the screen, the return condition is associated with each of the plurality of storage conditions, and the return condition determination unit stores the storage screen. Determining whether or not the return condition corresponding to the storage condition at the time is satisfied, and when the screen return means determines that there are a plurality of the save screens satisfying the return condition, the plurality of save screens Among them, the storage screen having the highest priority is displayed on the display device in accordance with the set priority .

Furthermore, the computer program according to claim 10 causes the computer to function as screen display means for switching a plurality of types of screens to be displayed on a display device, and at least one storage condition and a return condition for each of the plurality of types of screens. When the screens associated with each other and displayed on the display device are switched in a state where the storage condition corresponding to the type of the screen displayed on the display device is satisfied immediately before the switching is performed. A screen saving unit that saves a screen displayed on the display device immediately before switching as a save screen; and after the save screen is saved by the screen save unit, the screen is saved as the save screen. A return condition determination means for determining whether or not the return condition corresponding to the type of the screen is satisfied, and the return condition determination means A computer program for functioning as a screen restoration means for displaying the saved screen saved by the screen saving means on the display device when it is determined that the restoration condition is satisfied. When the storage condition is associated with a plurality of types, the return condition is associated with each of the plurality of storage conditions, and the return condition determination unit is configured to store the storage screen when the storage screen is stored. It is determined whether or not the return condition corresponding to the storage condition is satisfied, and the screen return means, when it is determined that there are a plurality of the save screens satisfying the return condition, The storage screen having the highest priority is displayed on the display device in accordance with the set priority .

According to the image display system having the above-described configuration, when the screen displayed on the display device is switched in a state where the storage condition is satisfied, the image is displayed on the display device immediately before the switching is performed. The saved screen is saved as a save screen, and when the return condition corresponding to the save condition is satisfied after that, the saved save screen is displayed on the display device, so the saved save screen is displayed on the display device. In the case of re-displaying, it is possible to appropriately re-display in a situation where the user needs to re-display without imposing a heavy operation burden on the user.
In addition, since the save condition and the return condition are set in association with each other for each of a plurality of types of screens displayed on the display device, the screen can be saved and restored under appropriate conditions according to the screen contents. It becomes possible. Therefore, it is possible to save the screen displayed on the display device immediately before the switching is appropriately performed in a situation where the user needs to save, and save appropriately in the situation where the user needs to redisplay. The displayed screen can be redisplayed.

Further, according to the image display system of the second aspect, it is possible to determine whether or not the storage condition and the return condition are satisfied based on the table.

  Further, according to the image display system of the third aspect, when it is determined that the deletion condition is satisfied, the stored screen that has been stored is deleted, so that the storage screen that is no longer needed can be appropriately deleted. It becomes. Therefore, the storage capacity for storing the save screen can be reduced.

  According to the image display system of the fourth aspect, since the deletion condition is set for each of a plurality of types of screens displayed on the display device, the storage screen is deleted under an appropriate condition according to the screen contents. It becomes possible. Therefore, in a situation where the user does not need to redisplay the storage screen, the storage screen can be appropriately deleted.

  According to the image display system of the fifth aspect, the route guidance screen for performing route guidance from the departure point of the moving object to the destination is set as the deletion condition that the moving object has arrived at the destination. Therefore, the saved route guidance screen can be appropriately deleted in a situation where the user need not re-display the saved route guidance screen.

  According to the image display system of the sixth aspect, since the facility search screen for searching for facilities is set to start searching for new facilities as a deletion condition, the user is stored. In a situation where it is not necessary to redisplay the facility search screen, the stored facility search screen can be appropriately deleted.

  According to the image display system of claim 7, when the storage screen is a screen for displaying a map around the current position of the mobile object, the display target is displayed when the storage screen is displayed on the display device. Since the save screen to be updated is updated based on the newly detected current position of the moving body, when the save screen whose display contents change with the passage of time is restored, it is re-displayed by an appropriate screen according to the current state. It is possible to display.

According to the image display device of the eighth aspect, when the screen displayed on the display device is switched in a state where the storage condition is satisfied, the image is displayed on the display device immediately before the switching is performed. The saved screen is saved as a save screen, and when the return conditions corresponding to the save conditions are met after that, the saved save screen is displayed on the display device. Therefore, the saved save screen is displayed again on the display device. In the case of displaying, it is possible to appropriately redisplay in a situation where the user needs to redisplay without imposing a large operation burden on the user.
In addition, since the save condition and the return condition are set in association with each other for each of a plurality of types of screens displayed on the display device, the screen can be saved and restored under appropriate conditions according to the screen contents. It becomes possible. Therefore, it is possible to save the screen displayed on the display device immediately before the switching is appropriately performed in a situation where the user needs to save, and save appropriately in the situation where the user needs to redisplay. The displayed screen can be redisplayed.

According to the image display method of the ninth aspect, when the screen displayed on the display device is switched in a state where the storage condition is satisfied, the image is displayed on the display device immediately before the switching is performed. The saved screen is saved as a save screen, and when the return conditions corresponding to the save conditions are met after that, the saved save screen is displayed on the display device. Therefore, the saved save screen is displayed again on the display device. In the case of displaying, it is possible to appropriately redisplay in a situation where the user needs to redisplay without imposing a large operation burden on the user.
In addition, since the save condition and the return condition are set in association with each other for each of a plurality of types of screens displayed on the display device, the screen can be saved and restored under appropriate conditions according to the screen contents. It becomes possible. Therefore, it is possible to save the screen displayed on the display device immediately before the switching is appropriately performed in a situation where the user needs to save, and save appropriately in the situation where the user needs to redisplay. The displayed screen can be redisplayed.

Furthermore, according to the computer program of claim 10, when the screen displayed on the display device is switched in a state where the storage condition is satisfied, the screen is displayed on the display device immediately before the switching is performed. The screen of the status is saved as a save screen, and when the return conditions corresponding to the save conditions are met after that, the saved save screen is displayed on the display device, so the saved save screen is redisplayed on the display device In this case, it is possible to appropriately redisplay in a situation where the user needs to redisplay without imposing a large operation burden on the user.
In addition, since the save condition and the return condition are set in association with each other for each of a plurality of types of screens displayed on the display device, the screen can be saved and restored under appropriate conditions according to the screen contents. It becomes possible. Therefore, it is possible to save the screen displayed on the display device immediately before the switching is appropriately performed in a situation where the user needs to save, and save appropriately in the situation where the user needs to redisplay. The displayed screen can be redisplayed.

It is the block diagram which showed the navigation apparatus which concerns on this embodiment. It is the figure which showed the driving guidance screen displayed on a liquid crystal display. It is the figure which showed the preservation | save screen list display screen displayed on a liquid crystal display. It is the figure which showed the map display screen displayed on a liquid crystal display. It is the figure which showed the TV screen displayed on a liquid crystal display. It is the figure which showed the menu screen displayed on a liquid crystal display. It is the figure which showed the facility search screen displayed on a liquid crystal display. It is the figure which showed an example of the condition setting table. It is a flowchart of the screen display processing program which concerns on this embodiment. It is a flowchart of the sub process program of the preservation | save screen return process which concerns on this embodiment. It is a flowchart of the sub process program of the preservation | save screen deletion process which concerns on this embodiment. It is a flowchart of the sub process program of the screen preservation | save process which concerns on this embodiment. It is the figure which showed the example of the preservation | save and the return of the screen displayed on the liquid crystal display.

  DETAILED DESCRIPTION Hereinafter, an image display system and an image display apparatus according to the present invention will be described in detail with reference to the drawings based on an embodiment in which the navigation apparatus is embodied. First, a schematic configuration of the navigation device 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a navigation device 1 according to this embodiment.

  As shown in FIG. 1, the navigation device 1 according to the present embodiment includes a current position detection unit 11 that detects a current position of a vehicle on which the navigation device 1 is mounted, a data recording unit 12 that records various data, A navigation ECU 13 that performs various arithmetic processes based on the input information, an operation unit 14 that receives operations from the user, and a liquid crystal display 15 that displays various screens such as a map around the vehicle and a menu screen to the user. And a speaker 16 that outputs voice guidance regarding route guidance, a DVD drive 17 that reads a DVD as a storage medium, and an information center such as a probe center or a VICS (registered trademark: Vehicle Information and Communication System) center. And a communication module 18 for performing the above.

Below, each component which comprises the navigation apparatus 1 is demonstrated in order.
The current position detection unit 11 includes a GPS 21, a vehicle speed sensor 22, a steering sensor 23, a gyro sensor 24, and the like, and can detect the current vehicle position, direction, vehicle traveling speed, current time, and the like. . Here, in particular, the vehicle speed sensor 22 is a sensor for detecting a moving distance and a vehicle speed of the vehicle, generates a pulse according to the rotation of the driving wheel of the vehicle, and outputs a pulse signal to the navigation ECU 13. And navigation ECU13 calculates the rotational speed and moving distance of a driving wheel by counting the generated pulse. Note that the navigation device 1 does not have to include all of the above five types of sensors, and the navigation device 1 may include only one or more of these types of sensors.

  The data recording unit 12 reads an external storage device and a hard disk (not shown) as a recording medium, a map information DB 31 recorded on the hard disk, a screen storage DB 32, a condition setting table 33, a predetermined program, and the like, and a hard disk And a recording head (not shown) which is a driver for writing predetermined data. The data recording unit 12 may be configured by a memory card, an optical disk such as a CD or a DVD, instead of the hard disk.

  Here, the map information DB 31 includes, for example, link data relating to roads (links), node data relating to node points, point data relating to points such as facilities, map display data for displaying maps, intersection data relating to each intersection, and routes. It is a storage means in which search data for searching, search data for searching for points, and the like are stored.

  The screen storage DB 32 is storage means for storing a screen currently stored in the navigation device 1 (hereinafter referred to as a storage screen). Here, in the navigation device 1 according to the present embodiment, the screen (running guidance screen, map display screen, menu screen, TV screen, facility search screen, etc.) displayed on the liquid crystal display 15 is switched as will be described later. In this case, when switching is performed in a state where a predetermined storage condition is satisfied, the screen displayed on the liquid crystal display 15 immediately before the switching is performed is stored in the screen storage DB 32 as a storage screen. Then, the storage screen stored in the screen storage DB 32 is displayed again on the liquid crystal display 15 when a predetermined return condition is satisfied. Further, when a predetermined deletion condition is satisfied, it is deleted from the screen storage DB 32.

  The condition setting table 33 is data in which a storage condition, a return condition, and a deletion condition are stored in association with each other for each of a plurality of types of screens displayed on the liquid crystal display 15. Here, in the navigation device 1 according to the present embodiment, as a screen displayed on the liquid crystal display 15, for example, (A) a travel guidance screen showing a map image around the vehicle, and (B) a map showing a map image of an arbitrary area. A display screen, (C) a TV screen that has received a television broadcast, (D) a menu screen for calling various settings and screens in the navigation device 1, and (E) a facility for searching for a facility for setting a destination, etc. There is a search screen. In the condition setting table 33, the storage condition, the return condition, and the deletion condition are stored in association with each other for each of the screens (A) to (E).

Here, each screen displayed on the liquid crystal display 15 will be briefly described with reference to FIGS.
First, FIG. 2 is a diagram showing a travel guidance screen 50 showing a map image around the vehicle.
As shown in FIG. 2, the driving guidance screen 50 displayed on the liquid crystal display 15 includes a map image 51 around the current position of the vehicle, a vehicle position mark 52 indicating the current position of the vehicle matched on the map, A center cursor 53 for specifying the center position of the display target area of the map image 51, a guide route 54 currently set in the navigation device 1 (displayed only when a guide route is set), and a predetermined function in the navigation device 1 Various buttons 55 to 59 selected to execute the screen, a screen save icon 60, and a save screen list icon 61 are displayed. The user can grasp facility information around the current vehicle, road shape (including a guidance route when a guidance route is set), and the like by referring to the travel guidance screen 50. When the screen is switched while the screen save icon 60 is pressed, the travel guide screen 50 displayed on the liquid crystal display 15 immediately before the switch is saved as a save screen in the screen save DB 32. When the save screen list icon 61 is pressed, a list of save screens currently stored in the screen save DB 32 (see FIG. 3) is displayed on the liquid crystal display 15. However, if there is no save screen in the screen save DB 32, the save screen list icon 61 is not displayed. The travel guidance screen 50 displays a guidance route 54 when the destination is set in the navigation device 1 and also displays an enlarged view of the intersection when a guidance intersection approaches. That is, it functions as a route guidance screen for performing route guidance from the departure point of the vehicle to the destination.

FIG. 3 is a diagram showing a storage screen list display screen 62 displayed on the liquid crystal display 15 when the storage screen list icon 61 is pressed.
As shown in FIG. 3, the storage screen list display screen 62 includes a list of storage screens 63 stored in the screen storage DB 32, a close box 64 selected when the storage screen 63 is deleted, and a liquid crystal display 15. A return button 65 is displayed that is selected when returning the displayed screen to the previous display screen (for example, the travel guidance screen). The user can grasp the storage screen currently stored in the screen storage DB 32 by referring to the storage screen list display screen 62. Further, by selecting the storage screen 63 displayed on the storage screen list display screen 62, the selected storage screen 63 can be displayed (returned) on the liquid crystal display 15 again. When the storage screen 63 is displayed again on the liquid crystal display 15, the storage screen 63 is basically displayed in a state where it is displayed immediately before switching. Therefore, for example, when switching is performed in a state where characters or the like are input on the facility search screen or the like, the characters input before the switching is performed are redisplayed on the liquid crystal display 15 in a state where the characters have already been input. The However, as described later, some screens such as a driving guidance screen showing a map image around the vehicle are displayed according to the current state (for example, the current position of the vehicle) when redisplayed on the liquid crystal display 15. It reappears after the content has been updated. In addition, by selecting the close box 64, the corresponding storage screen 63 can be deleted from the screen storage DB 32.

On the other hand, FIG. 4 is a diagram showing a map display screen 70 showing a map image of an arbitrary area.
As shown in FIG. 4, a map display screen 70 displayed on the liquid crystal display 15 includes a map image 71 in an arbitrary area designated by the user and a center cursor 72 for specifying the center position of the display target area of the map image 71. Then, various buttons 73 to 77 to be selected for executing a predetermined function in the navigation device 1, a screen save icon 60, and a save screen list icon 61 are displayed. Then, by referring to the map display screen 70, the user can grasp facility information, road shape, and the like in an arbitrary area. When the screen is switched while the screen save icon 60 is pressed, the map display screen 70 displayed on the liquid crystal display 15 immediately before the switch is saved in the screen save DB 32. When the save screen list icon 61 is pressed, a list of save screens currently stored in the screen save DB 32 (see FIG. 3) is displayed on the liquid crystal display 15.

FIG. 5 is a diagram showing a TV screen 78 that receives a television broadcast.
As shown in FIG. 5, a TV screen 78 displayed on the liquid crystal display 15 includes a broadcast image 79 of a broadcast station of a channel selected by the user, channel information 80 indicating a channel name and a broadcast station, and a screen save icon 60. And a save screen list icon 61 are displayed. The user can view the TV broadcast by referring to the TV screen 78, and can grasp the broadcast station of the broadcast currently being viewed and the currently selected channel number. When the screen is switched while the screen save icon 60 is pressed, the TV screen 78 displayed on the liquid crystal display 15 immediately before the switch is saved in the screen save DB 32. Note that the TV screen 78 may be saved and the screen may be switched to the travel guide screen 50 on condition that the screen save icon 60 is pressed. When the save screen list icon 61 is pressed, a list of save screens currently stored in the screen save DB 32 (see FIG. 3) is displayed on the liquid crystal display 15.

FIG. 6 is a diagram showing a menu screen 81 for performing various settings and screen calls in the navigation device 1.
As shown in FIG. 6, the menu screen 81 displayed on the liquid crystal display 15 includes various buttons 82 to 89 operated to perform various settings and screen calls, and one screen displayed on the liquid crystal display 15. A return button 90 selected when returning to a previous display screen (for example, a travel guidance screen), a screen save icon 60, and a save screen list icon 61 are displayed. When various buttons 82 to 89 displayed on the liquid crystal display 15 are operated by the user, various settings corresponding to the buttons and screen calling are executed. In addition, while the vehicle is in a running state, a specific button (a predetermined number of times (for example, twice) for executing the function) among the various buttons 60, 61, 82 to 90 displayed on the menu screen 81 is used. The button that needs to be operated is controlled so that the display mode is changed (for example, tone down) and cannot be operated by the user. When the screen is switched while the screen save icon 60 is pressed, the menu screen 81 displayed on the liquid crystal display 15 immediately before the switch is saved in the screen save DB 32. Note that the menu screen 81 may be saved and the screen may be switched to the travel guide screen 50 on condition that the screen save icon 60 is pressed. When the save screen list icon 61 is pressed, a list of save screens currently stored in the screen save DB 32 (see FIG. 3) is displayed on the liquid crystal display 15.

FIG. 7 is a diagram showing a facility search screen 91 for searching for a facility for setting a destination or the like.
As shown in FIG. 7, on the facility search screen 91, a character input button 92 that is a selection target, a correction button 93, a completion button 94, and the selected selection target can be identified from other selection targets. , A character display unit 96 for displaying characters input so far, and a return selected when returning the screen displayed on the liquid crystal display 15 to the previous display screen (for example, the menu screen). A button 97, a screen save icon 60, and a save screen list icon 61 are displayed. Here, the character input button 92 is composed of buttons corresponding to 50 “kana” sounds. For example, the button displaying “A” is selected and determined by the cursor 95 (for example, the operation unit). 14), the character “A” is input to the character display unit 96. The character input button 92 is displayed in a tone-down manner for buttons corresponding to characters determined not to be input based on the characters input so far and the facility information stored in the map information DB 31. The cursor 95 is not selectable. The correction button 93 is a button that is selected when a character already input to the character display unit 96 is deleted. The completion button 94 is a button that is selected when a list of facilities that include the character string input to the character display unit 96 so far in the name is displayed on the liquid crystal display 15. In addition, while the vehicle is in a running state, a specific button (a predetermined number of times (for example, twice) for executing the function) among the various buttons 60, 61, 92 to 94, 97 displayed on the facility search screen 91 is displayed. The above button (which requires user operation) is controlled such that the display mode is changed (for example, tone down) and cannot be operated by the user. When the screen is switched while the screen save icon 60 is pressed, the facility search screen 91 displayed on the liquid crystal display 15 immediately before the switch is saved in the screen save DB 32. In particular, when switching is performed in a state where characters are input, the characters are stored together with the input character contents. Note that the facility search screen 91 may be saved and the screen may be switched to the travel guide screen 50 on condition that the screen save icon 60 is pressed. When the save screen list icon 61 is pressed, a list of save screens currently stored in the screen save DB 32 (see FIG. 3) is displayed on the liquid crystal display 15.

Next, an example of the condition setting table 33 recorded in the data recording unit 12 of the navigation device 1 will be described with reference to FIG.
As shown in FIG. 8, in the condition setting table 33, for each type of screen displayed on the liquid crystal display 15, a storage condition, a restoration condition, and a deletion condition are set in association with each other. When a plurality of storage conditions are set for one screen, a return condition corresponding to each storage condition is set. That is, the condition for returning the storage screen is determined by the storage condition when the storage screen is stored. Here, the storage condition is a condition for storing the screen currently displayed on the liquid crystal display 15 as a storage screen, and when the screen displayed on the liquid crystal display 15 is switched in a state where the storage condition is satisfied. In addition, the screen displayed on the liquid crystal display 15 immediately before switching is stored in the screen storage DB 32. The return condition is a condition for redisplaying (returning) the screen stored in the screen storage DB 32. When the return condition is satisfied, the screen stored in the screen storage DB 32 is displayed again on the liquid crystal display 15. Is done. The deletion condition is a condition for deleting a screen stored in the screen storage DB 32. When the deletion condition is satisfied, the screen stored in the screen storage DB 32 is deleted from the screen storage DB 32.

For example, in the travel guidance screen 50 showing the map image around the vehicle shown in FIG. 2, the storage conditions are “another storage screen has returned” and “the screen storage icon 60 has been pressed” as the storage conditions. Is set. In addition, “return operation from the returned screen (operation of the return button 90, etc.) was performed” is set as the return condition, corresponding to the storage condition “another save screen has returned”. Yes. Furthermore, “return to the storage screen is selected from the storage screen list display screen 62 (see FIG. 3)” is set corresponding to the storage condition “the screen save icon 60 has been pressed”. . Further, the deletion conditions are “the vehicle ACC is turned off”, “the saving screen is restored”, “a predetermined time has passed since saving”, “save screen list display screen 62 (FIG. 3). “Deletion of the save screen is selected from“ Ref.) ”And“ Arriving at the destination (only when setting the destination) ”are set.
Similarly, for other types of screens, storage conditions, return conditions, and deletion conditions are set in association with each other.
Then, the navigation ECU 13 executes various controls such as storage, return (redisplay), and deletion of the storage screen based on the condition setting table 33.

  On the other hand, the navigation ECU (Electronic Control Unit) 13 is an electronic control unit that controls the entire navigation device 1. The CPU 41 as an arithmetic device and a control device, and a working memory when the CPU 41 performs various arithmetic processes. And a ROM 43 in which route data and the like when a route is searched are stored, a ROM 43 in which a screen display processing program (see FIGS. 9 to 12) described later is recorded in addition to a control program, An internal storage device such as a flash memory 44 for storing a program read from the ROM 43 is provided. The navigation ECU 13 constitutes various means as processing algorithms. For example, the guide route setting means sets a guide route from a departure place (for example, the current position of the vehicle) to a destination. The screen display means switches a plurality of types of screens and displays them on the liquid crystal display 15. The screen storage means stores the screen displayed on the liquid crystal display 15 immediately before switching when the screen displayed on the liquid crystal display 15 is switched in a state where predetermined storage conditions are satisfied. The screen is stored in the screen storage DB 32 as a screen. The return condition determination means determines whether the return condition corresponding to the storage condition is satisfied after the storage screen is stored in the screen storage DB 32. The screen restoration means displays the saved screen stored in the screen saving DB 32 on the liquid crystal display 15 when the restoration condition judging means determines that the restoration condition is satisfied. The deletion condition determination unit determines whether or not a predetermined deletion condition is satisfied, and the screen deletion unit displays the saved screen stored in the screen storage DB 32 when the return condition determination unit determines that the return condition is satisfied. Delete from the storage DB 32. The current position acquisition means acquires the current position of the vehicle on which the navigation device 1 is mounted as a moving body. When the save screen is a travel guide screen 50 that displays a map around the current position of the vehicle, the screen update means displays the save screen on the liquid crystal display 15 by the screen return means, and displays the save screen on the current position of the vehicle. Update based on.

  The operation unit 14 is means for performing various operations corresponding to the screen displayed on the liquid crystal display 15 (for example, selection of the screen save icon 60 and the save screen list icon 61, input of characters, etc.), and various keys and buttons. And a plurality of operation switches (not shown). Then, the navigation ECU 13 performs control to execute various corresponding operations based on switch signals output by pressing the switches. The operation unit 14 can also be configured by a touch panel provided on the front surface of the liquid crystal display 15. Moreover, it can also be comprised with a microphone and a speech recognition apparatus.

  In addition, the liquid crystal display 15 includes the above-described travel guidance screen 50 (FIG. 2), the storage screen list display screen 62 (FIG. 3), the map display screen 70 (FIG. 4), the TV screen 78 (FIG. 5), and the menu screen 81. (FIG. 6), the facility search screen 91 (FIG. 7), etc. are switched and displayed. For example, when a predetermined operation by the user is received or when the vehicle starts running, the displayed screen is switched to another screen.

  The speaker 16 outputs voice guidance for guiding traveling along the guidance route based on an instruction from the navigation ECU 13 and traffic information guidance.

  The DVD drive 17 is a drive that can read data recorded on a recording medium such as a DVD or a CD. Based on the read data, music and video are reproduced, the map information DB 31 is updated, and the like. In addition, it is good also as a structure provided with HDD and a memory card reader instead of the DVD drive 17. FIG.

  The communication module 18 is a communication device for receiving traffic information composed of information such as traffic jam information, regulation information, and traffic accident information transmitted from a traffic information center, for example, a VICS center or a probe center. For example, a mobile phone or DCM is applicable.

  Next, a screen display processing program executed by the CPU 41 in the navigation device 1 having the above configuration will be described with reference to FIG. FIG. 9 is a flowchart of the screen display processing program according to the present embodiment. Here, the screen display processing program is executed after the vehicle ACC is turned on, and displays the screen on the liquid crystal display 15, switches the screen to be displayed, saves the screen displayed on the liquid crystal display 15, restores the saved screen, and This is a program that performs deletion and the like. The programs shown in the flowcharts of FIGS. 9 to 12 below are stored in the RAM 42 and the ROM 43 provided in the navigation device 1 and are executed by the CPU 41.

  First, in step (hereinafter abbreviated as “S”) 1 in the screen display processing program, the CPU 41 displays a travel guidance screen 50 (FIG. 2), a map display screen 70 (FIG. 4), a TV screen 78 ( 5), a menu screen 81 (FIG. 6), a facility search screen 91 (FIG. 7), etc. are displayed. Here, immediately after the ACC is turned on, a travel guidance screen 50 (FIG. 2), which is a map image around the vehicle, is displayed. Thereafter, the screen is switched when the return condition of the storage screen is satisfied, the vehicle starts running, or a user's predetermined operation is accepted as described later (S13, S35). The next screen is displayed.

  Next, in S <b> 2, the CPU 41 determines whether there is a save screen saved in the screen save DB 32. Here, in the navigation device 1 according to the present embodiment, switching is performed when the screen displayed on the liquid crystal display 15 is switched in a state where a predetermined storage condition is satisfied by screen storage processing (S6) described later. The screen that has been displayed on the liquid crystal display 15 immediately before the operation is stored in the screen storage DB 32 as a storage screen. Further, the storage screen is deleted from the screen storage DB 32 when a predetermined deletion condition is satisfied.

  If it is determined that there is a save screen saved in the screen save DB 32 (S2: YES), the process proceeds to S3. On the other hand, when it is determined that there is no save screen saved in the screen save DB 32 (S2: NO), the process proceeds to S6.

  In S3, the CPU 41 superimposes and displays the save screen list icon 61 on the screen displayed on the liquid crystal display 15 (see FIGS. 2 and 4 to 7). When the save screen list icon 61 is pressed, a list of save screens currently saved in the screen save DB 32 is displayed on the liquid crystal display 15 (see FIG. 3).

  Next, in S4, the CPU 41 executes a saved screen return process (FIG. 10) described later. The save screen return process determines whether the save screen stored in the screen save DB 32 satisfies the return condition set in the save screen, and when it is determined that the return condition is satisfied, the save screen is restored. Is displayed again on the liquid crystal display 15.

  Subsequently, in S5, the CPU 41 executes a later-described saved screen deletion process (FIG. 11). The storage screen deletion process determines whether the storage screen stored in the screen storage DB 32 satisfies the deletion condition set in the storage screen, and the storage screen is determined when it is determined that the deletion condition is satisfied. Is deleted from the screen storage DB 32.

  Thereafter, in S6, the CPU 41 executes a later-described screen saving process (FIG. 12). Note that the screen saving process is performed when the screen displayed on the liquid crystal display 15 is switched in a state where a predetermined storage condition is satisfied, and the screen displayed on the liquid crystal display 15 immediately before the switching is performed. Is stored in the screen storage DB 32 as a storage screen. Thereafter, the process returns to S1.

  Next, the sub-process of the saved screen return process executed in S4 will be described with reference to FIG. FIG. 10 is a flowchart of a sub-processing program for saving screen restoration processing.

  First, in S <b> 11, the CPU 41 acquires the save screen return condition stored in the screen save DB 32. Here, the return condition is a condition for redisplaying (returning) the screen stored in the screen storage DB 32, and is set for each type of screen as shown in the condition setting table 33 (FIG. 8). In addition, the return condition varies depending on the save condition in which the save screen is saved. For example, when the storage screen is the facility search screen 91 and the screen is switched by switching the screen by pressing the screen save icon 60 while the vehicle is running, the return condition is “the vehicle has stopped”, “ “Restoration of the storage screen is selected” is acquired from the storage screen list display screen 62 (see FIG. 3). In addition, when the storage screen is the facility search screen 91 and the screen is switched by pressing the screen storage icon 60 while the vehicle is stopped, the storage screen list display screen 62 (FIG. 3 ”) is acquired only. Note that the conditions under which the save screen is saved are stored in the RAM 42 or the like in S35 described later. Further, when there are a plurality of storage screens, a return condition corresponding to each of the plurality of storage screens is acquired.

  Next, in S12, the CPU 41 determines whether or not the save screen restoration condition acquired in S11 is satisfied.

  And when it determines with satisfy | filling the return conditions of a preservation | save screen (S12: YES), it transfers to S13. On the other hand, when it is determined that the save screen restoration condition is not satisfied (S12: NO), the process proceeds to S5.

  In S13, the CPU 41 determines whether or not the storage screen that satisfies the return condition is a storage screen that needs to be updated. Here, the storage screen that needs to be updated is a storage screen that needs to be updated in accordance with the passage of time or changes in vehicle status. 78 etc. correspond.

  If it is determined that the save screen that satisfies the return condition is a save screen that needs to be updated (S13: YES), the process proceeds to S14. On the other hand, when it is determined that the storage screen that satisfies the return condition is not a storage screen that needs to be updated (S13: NO), the process proceeds to S15.

  In S14, the CPU 41 updates the display content of the storage screen that satisfies the return condition. For example, when the storage screen is a travel guidance screen 50 showing a map image around the vehicle, the current position of the vehicle is detected by the current position detection unit 11, and based on the detected current position of the vehicle and the map information DB 31. To update the display content corresponding to the current vehicle position. When the save screen is the TV screen 78, a new broadcast radio wave is acquired via the tuner and updated to a display video corresponding to the current broadcast content.

  Next, in S <b> 15, the CPU 41 redisplays the saved screen that satisfies the return condition on the liquid crystal display 15. When the save screen is updated in S14, the updated save screen is displayed. As a result, the screen displayed on the liquid crystal display 15 is switched to the save screen. When there are a plurality of storage screens that satisfy the return condition, the storage screen with the highest priority is redisplayed in accordance with a preset priority. As the priority order, for example, the newer the saved date and time, the higher the priority order may be set, or the priority order may be set for each type of screen. In addition, if the save screen is a screen on which characters or the like such as the facility search screen 91 can be input and saved in a state where the characters etc. are input, the characters input at the time of saving are already input. In this state, the image is displayed again on the liquid crystal display 15. Thereafter, the process proceeds to S5.

  Next, the sub-process of the save screen deletion process executed in S5 will be described with reference to FIG. FIG. 11 is a flowchart of a sub-processing program for saving screen deletion processing.

  First, in S <b> 21, the CPU 41 acquires the save screen deletion conditions stored in the screen storage DB 32. Here, the deletion condition is a condition for deleting a screen stored in the screen storage DB 32, and is set for each type of screen as shown in the condition setting table 33 (FIG. 8). For example, when the storage screen is the facility search screen 91, the deletion conditions are “the vehicle ACC has been turned off”, “the storage screen has returned”, “a predetermined time has elapsed since the storage”, “Deletion of the storage screen is selected from the storage screen list display screen 62 (see FIG. 3)” and “New search conditions are input on the facility search screen 91” are set. If there are a plurality of storage screens, a deletion condition corresponding to each of the plurality of storage screens is acquired.

  Next, in S22, the CPU 41 determines whether or not the save screen deletion condition acquired in S21 is satisfied.

  And when it determines with satisfy | filling the deletion conditions of a preservation | save screen (S22: YES), it transfers to S23. On the other hand, when it is determined that the save screen deletion condition is not satisfied (S22: NO), the process proceeds to S6.

  In S <b> 23, the CPU 41 deletes the storage screen that satisfies the deletion condition from the screen storage DB 32. When there are a plurality of storage screens that satisfy the deletion condition, all the corresponding storage screens are deleted. Thereafter, the process proceeds to S6.

  Next, the sub-process of the screen saving process executed in S6 will be described with reference to FIG. FIG. 12 is a flowchart of a sub-processing program for screen saving processing.

  First, in S <b> 31, the CPU 41 obtains the storage conditions for the screen currently displayed on the liquid crystal display 15. Here, the saving conditions are conditions for saving the screen currently displayed on the liquid crystal display 15 as a saving screen, and are set for each type of screen as shown in the condition setting table 33 (FIG. 8). For example, when the storage screen is the facility search screen 91, “the screen save icon 60 is pressed while the vehicle is traveling” and “the screen save icon 60 is pressed while the vehicle is stopped” are acquired as the storage conditions. The

  Next, in S32, the CPU 41 determines whether or not the screen displayed on the liquid crystal display 15 has been switched in a state where the storage condition acquired in S31 is satisfied.

  When it is determined that the screen displayed on the liquid crystal display 15 has been switched in a state where the storage condition is satisfied (S32: YES), the process proceeds to S34. On the other hand, when it is determined that the screen displayed on the liquid crystal display 15 is not switched in a state where the storage condition is satisfied (S32: NO), the process proceeds to S35.

  In S33, the CPU 41 determines whether or not the screen displayed on the liquid crystal display 15 has been switched in a state where the storage condition acquired in S11 is not satisfied.

  If it is determined that the screen displayed on the liquid crystal display 15 has been switched in a state where the storage condition is not satisfied (S33: NO), the process proceeds to S36. On the other hand, when it is determined that the screen displayed on the liquid crystal display 15 has not been switched (S32: NO), the process returns to S1.

  On the other hand, in S34, the CPU 41 stores the screen currently displayed on the liquid crystal display 15 (that is, the screen displayed on the liquid crystal display 15 immediately before switching) in the screen storage DB 32 as a storage screen. In particular, when switching is performed in a state where characters are input, the characters are stored together with the input character contents.

  Next, in S35, the CPU 41 stores the storage condition determined to be satisfied in S32 in the RAM 42 or the like. Note that the storage conditions stored in S35 are used when acquiring the return condition of the storage screen in S11.

  Subsequently, in S <b> 36, the CPU 41 switches the screen displayed on the liquid crystal display 15. For example, when the TV screen 78 is displayed with the vehicle stopped, and the vehicle starts to travel, the screen is switched from the TV screen 78 to the travel guidance screen 50. In addition, when the menu screen 81 or the facility search screen 91 is displayed and a current location button (not shown) is pressed after the vehicle starts traveling, the travel guidance screen is displayed from the menu screen 81 or the facility search screen 91. The screen switches to 50. Thereafter, the process returns to S1.

In the navigation device 1 according to the present embodiment, the screen displayed on the liquid crystal display 15 can be saved and restored as follows by executing the screen display processing program shown in FIGS. Is possible.
For example, as shown in FIG. 13, when the vehicle starts traveling while inputting the search condition on the facility search screen 91 displayed on the liquid crystal display 15, the operation of the facility search screen 91 is restricted, and the travel It is necessary to switch the screen to the guidance screen 50. In that case, the facility search screen 91 immediately before the switching can be stored in the screen storage DB 32 by pressing the screen storage icon 60 and switching the screen to the travel guidance screen 50. As a result, after the vehicle stops, the stored facility search screen 91 is displayed again on the liquid crystal display 15, and the user can continue to input search conditions from the state immediately before switching.

As described in detail above, in the navigation device 1, the screen display method in the navigation device 1, and the computer program executed by the navigation device 1 according to the present embodiment, the screen displayed on the liquid crystal display 15 in a state where the storage condition is satisfied. When the switching is performed, the screen displayed on the liquid crystal display 15 immediately before the switching is stored as a storage screen (S34), and thereafter, the storage condition corresponds to the storage condition for storing the storage screen. When the return condition is satisfied, the stored screen is displayed on the liquid crystal display 15 (S15). Therefore, when the stored screen is displayed again on the liquid crystal display 15, a large operation burden is not imposed on the user. Redisplay properly in situations where the user needs to redisplay It is possible.
In addition, since a storage condition and a restoration condition are set in association with each other for each of a plurality of types of screens displayed on the liquid crystal display 15, the screen is saved and restored under appropriate conditions according to the screen contents. Is possible. Accordingly, it is possible to save the screen displayed on the liquid crystal display 15 immediately before the switching is appropriately performed in a situation where the user needs to save, and appropriately in a situation where the user needs to redisplay. The saved screen can be displayed again.
If it is determined that the deletion condition is satisfied, the stored screen that has been stored is deleted (S23), so that the storage screen that is no longer needed can be deleted appropriately. Therefore, the storage capacity for storing the save screen can be reduced.
In addition, since a deletion condition is set for each of a plurality of types of screens displayed on the liquid crystal display 15, it is possible to delete the saved screen under appropriate conditions according to the screen contents. Therefore, in a situation where the user does not need to redisplay the storage screen, the storage screen can be appropriately deleted.
In addition, the route guidance screen that performs route guidance from the departure point to the destination of the vehicle, which is a moving body, is set as a deletion condition that the vehicle has arrived at the destination. In a situation where it is not necessary to redisplay the screen, the stored route guidance screen can be appropriately deleted.
In addition, since the facility search screen 91 for searching for facilities is set to start searching for a new facility as a deletion condition, it is unnecessary to redisplay the facility search screen in which the user is stored. Thus, the stored facility search screen can be appropriately deleted.
Further, when the storage screen is the travel guidance screen 50 that displays a map around the current position of the vehicle, when the storage screen is displayed on the liquid crystal display 15, the storage screen newly detected as the storage screen to be displayed is displayed. Since the update is performed based on the current position, when the storage screen whose display contents change with the passage of time is restored, it can be displayed again on an appropriate screen according to the current state.

Note that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the scope of the present invention.
For example, in the present embodiment, the conditions illustrated in FIG. 8 are described as examples of the storage condition, the restoration condition, and the deletion condition, but other conditions may be set as the storage condition, the restoration condition, and the deletion condition. Further, the deletion condition may be set corresponding to the storage condition in which the storage screen is stored. In that case, a condition for deleting the storage screen is determined by the storage condition when the storage screen is stored.

  Further, in the present embodiment, when the screen displayed on the liquid crystal display 15 is switched in a state where the storage condition is satisfied, the screen displayed on the liquid crystal display 15 immediately before the switching is stored. Although the screen is stored as a screen, the screen displayed on the liquid crystal display 15 when the storage conditions are satisfied may be stored as a storage screen.

  In addition to the navigation device, the present invention can be applied to a device having a function of displaying a screen. For example, the present invention can be applied to a portable terminal such as a cellular phone or a PDA, a personal computer, a portable music player, etc. (hereinafter referred to as a portable terminal or the like). Further, the present invention can be applied to a system including a server and a mobile terminal. In that case, each step of the above-described screen display processing program (FIGS. 9 to 12) may be configured to be implemented by either a server or a mobile terminal. Further, when the present invention is applied to a mobile terminal or the like, the travel guidance screen 50 may show a map around the current position of a moving body other than a vehicle, for example, a user of a mobile terminal or a two-wheeled vehicle. . Furthermore, as a condition for deleting the route guidance screen for performing route guidance from the departure place to the destination, it is set that a moving body other than the vehicle, for example, a user such as a mobile terminal or a two-wheeled vehicle has arrived at the destination. May be.

1 Navigation device 13 Navigation ECU
15 LCD 32 Screen save DB
33 Condition setting table 41 CPU
42 RAM
43 ROM
50 Travel Guidance Screen 60 Screen Save Icon 61 Save Screen List Icon 62 Save Screen List Display Screen 70 Map Display Screen 78 TV Screen 81 Menu Screen 91 Facility Search Screen

Claims (10)

Provided with a screen display means for switching a plurality of types of screens to be displayed on the display device,
At least one or more storage conditions and return conditions are associated with each of the plurality of types of screens,
Switching is performed when the screen displayed on the display device is switched in a state where the storage condition corresponding to the type of the screen displayed on the display device is satisfied immediately before the switching is performed. Screen storage means for storing the screen that has been displayed on the display device immediately before as a storage screen;
Return condition determination means for determining whether or not the return condition corresponding to the type of the screen stored as the storage screen is satisfied after the storage screen is stored by the screen storage means;
Screen return means for displaying the saved screen saved by the screen saving means on the display device when the return condition judging means determines that the return condition is satisfied,
When a plurality of storage conditions are associated with one screen type, the return condition is associated with each of the plurality of storage conditions,
The return condition determining means determines whether or not the return condition corresponding to the storage condition when the storage screen is stored is satisfied ,
When it is determined that there are a plurality of the storage screens satisfying the recovery condition, the screen restoration unit displays the storage screen having the highest priority according to the set priority among the plurality of storage screens. An image display system characterized by being displayed on the screen. For each of the plurality of types of screens, a table that defines the correspondence between the types of the screens, the storage conditions, and the return conditions,
2. The image display system according to claim 1, wherein it is determined whether or not the storage condition and the return condition are satisfied based on the table. Deletion condition determination means for determining whether or not a predetermined deletion condition is satisfied;
The screen deletion means for deleting the saved screen saved by the screen saving means when the return condition judging means determines that the return condition is satisfied. 2. The image display system according to 2.   The image display system according to claim 3, wherein the deletion condition is set for each of the plurality of types of screens.   5. The image according to claim 4, wherein the route guidance screen for performing route guidance from the departure point of the moving object to the destination is set as the deletion condition that the moving object has arrived at the destination. Display system.   5. The image display system according to claim 4, wherein the facility search screen for searching for a facility is set to start a search for a new facility as the deletion condition. Current position acquisition means for acquiring the current position of the moving body;
When the storage screen is a screen that displays a map around the current position of the mobile object, when the storage screen is displayed on the display device by the screen return means, the storage screen is displayed by the current position acquisition means. The image display system according to claim 1, further comprising a screen update unit configured to update based on a newly detected current position of the moving body. Provided with a screen display means for switching a plurality of types of screens to be displayed on the display device,
At least one or more storage conditions and return conditions are associated with each of the plurality of types of screens,
Switching is performed when the screen displayed on the display device is switched in a state where the storage condition corresponding to the type of the screen displayed on the display device is satisfied immediately before the switching is performed. Screen storage means for storing the screen that has been displayed on the display device immediately before as a storage screen;
Return condition determination means for determining whether or not the return condition corresponding to the type of the screen stored as the storage screen is satisfied after the storage screen is stored by the screen storage means;
Screen return means for displaying the saved screen saved by the screen saving means on the display device when the return condition judging means determines that the return condition is satisfied,
When a plurality of storage conditions are associated with one screen type, the return condition is associated with each of the plurality of storage conditions,
The return condition determining means determines whether or not the return condition corresponding to the storage condition when the storage screen is stored is satisfied ,
When it is determined that there are a plurality of the storage screens satisfying the recovery condition, the screen restoration unit displays the storage screen having the highest priority according to the set priority among the plurality of storage screens. An image display device characterized by being displayed on the screen. The screen display means includes a step of switching a plurality of types of screens and displaying them on the display device,
At least one or more storage conditions and return conditions are associated with each of the plurality of types of screens,
When the screen storage means switches the screen displayed on the display device in a state where the storage condition corresponding to the type of the screen displayed on the display device just before the switching is satisfied is satisfied. Storing the screen displayed on the display device immediately before switching as a storage screen;
A step of determining whether a return condition determination unit satisfies the return condition corresponding to the type of screen stored as the storage screen after the storage screen is stored by the screen storage unit;
When the screen return means determines that the return condition is satisfied by the return condition determination means, and displays the storage screen stored by the screen storage means on the display device,
When a plurality of storage conditions are associated with one screen type, the return condition is associated with each of the plurality of storage conditions,
The return condition determining means determines whether or not the return condition corresponding to the storage condition when the storage screen is stored is satisfied ,
When it is determined that there are a plurality of the storage screens satisfying the recovery condition, the screen restoration unit displays the storage screen having the highest priority according to the set priority among the plurality of storage screens. image display method and displaying on. Computer
While functioning as a screen display means for switching between multiple types of screens and displaying them on the display device,
At least one or more storage conditions and return conditions are associated with each of the plurality of types of screens,
Switching is performed when the screen displayed on the display device is switched in a state where the storage condition corresponding to the type of the screen displayed on the display device is satisfied immediately before the switching is performed. Screen storage means for storing the screen that has been displayed on the display device immediately before as a storage screen;
Return condition determination means for determining whether or not the return condition corresponding to the type of the screen stored as the storage screen is satisfied after the storage screen is stored by the screen storage means;
A computer program for functioning as a screen return means for displaying the saved screen saved by the screen saving means on the display device when the return condition judging means determines that the return condition is satisfied. There,
When a plurality of storage conditions are associated with one screen type, the return condition is associated with each of the plurality of storage conditions,
The return condition determining means determines whether or not the return condition corresponding to the storage condition when the storage screen is stored is satisfied ,
When it is determined that there are a plurality of the storage screens satisfying the recovery condition, the screen restoration unit displays the storage screen having the highest priority according to the set priority among the plurality of storage screens. A computer program displayed on the screen .

Images