WO2013161042A1 - Display device, navigation device, control method, program, and recording medium - Google Patents

Description

Display device, navigation device, control method, program, and recording medium

The present invention relates to the technical field of displaying images.

Conventionally, in a navigation device that displays a map image or the like, it is prohibited to perform an operation while traveling from the viewpoint of ensuring driving safety. For example, in Patent Document 1, when a scroll operation is performed during traveling, the map data displayed at the time when the scroll operation is performed continues to be displayed as it is. It describes a technology that displays a message such as “Prohibited”.

JP 2000-88587 A

In the technique described in Patent Document 1 described above, when a scroll operation is performed during traveling, a message indicating that the scroll operation is prohibited is displayed after the scroll operation. You will recognize that you cannot. Therefore, it can be said that this technique allows the first scroll operation by the user. However, it is unreasonable for the technique described in Patent Document 1 to execute the scroll operation once even though the priority is not to perform the scroll operation during traveling or the like. I can say that.

The above is one example of problems to be solved by the present invention. A main object of the present invention is to provide a display device, a navigation device, a control method, a program, and a recording medium that allow a user to intuitively recognize that a map image cannot be operated.

In the first aspect of the present invention, the display device that displays the map image based on the map data includes a detecting unit that detects an operation of changing the display of the map image, and an image on which the display of the map image can be changed. In some cases, the first display control means for changing the display of the map image according to the operation detected by the detection means, and the display change cannot be performed when the map image is an image that cannot be changed. And a second display control means for displaying the map image by adding it to the map image.

In a seventh aspect of the present invention, a navigation device that can be mounted on a moving body that displays a map image based on map data includes a detecting unit that detects an operation of changing the display of the map image, and a traveling state of the moving body. Or a prohibiting unit that prohibits an operation of changing the display of the map image in accordance with an update state of the map data, and detected by the detecting unit when the prohibiting unit does not prohibit an operation of changing the display. A first display control means for changing the display of the map image according to an operation; and an object indicating that the display cannot be changed when the prohibiting means prohibits a display change operation. And a second display control means for displaying.

In the invention according to claim 8, the control method executed by the display device that displays the map image based on the map data includes a detection step of detecting an operation of changing the display of the map image, and the display change of the map image. A first display control step for changing the display of the map image according to the operation detected by the detection step, and the map image is an image that cannot be changed. And a second display control step of adding and displaying an object indicating that the display cannot be changed to the map image.

According to a ninth aspect of the present invention, there is provided a program that includes a computer and that is executed by a display device that displays a map image based on map data. The detection means detects the operation of changing the display of the map image. First display control means for changing the display of the map image according to the operation detected by the detection means when the map image is an image for which the display change operation is possible, the map image being a display change operation In the case where the image cannot be displayed, an object indicating that the display cannot be changed is added to the map image and displayed as a second display control unit.

The invention according to claim 10 is characterized in that the recording medium records the program according to claim 9.

1 shows a schematic configuration of a navigation device according to an embodiment. The figure for demonstrating the process map image which concerns on a 1st example is shown. The figure for demonstrating the process map image which concerns on a 2nd example is shown. An example of the processed map image which concerns on a 3rd example is shown. An example of the processed map image which concerns on a 4th example is shown. An example of the processed map image which concerns on a 5th example is shown. An example of the processed map image which concerns on a 6th example is shown.

In one aspect of the present invention, a display device that displays a map image based on map data is a detection unit that detects a display change operation of the map image, and the map image is an image that can be changed in display. In this case, when the first display control means for changing the display of the map image according to the operation detected by the detection means, and when the map image is an image that cannot be changed, the display cannot be changed. Second display control means for adding an object to be displayed to the map image for display.

The above display device is preferably used for displaying a map image based on the map data. The detecting means detects an operation for changing the display of the map image performed by the user. The first display control means changes the display of the map image according to the operation detected by the detection means when the map image is an image that can be changed. On the other hand, when the map image is an image that cannot be changed in display, the second display control means adds an object indicating that the display cannot be changed to the map image and displays it. By displaying such a map image, the user can intuitively recognize that the map image cannot be changed. Therefore, according to said display apparatus, it becomes possible to suppress appropriately that a user performs operation during the display of the map image which cannot perform display change operation.

In one aspect of the above display device, the second display control means adds and displays an object that represents the map image that cannot be changed in display as if it was written on a paper medium. Thereby, it is possible to give the user an impression that the paper is only the area where the map is written, and it is possible to make the user intuitively recognize that the map image cannot be changed.

Preferably, in the above display device, the second display control unit displays a map image on which a display change operation cannot be performed with a frame. Thereby, it can be made to recognize more effectively that the map image cannot be changed by the user.

In another aspect of the display device, the second display control unit adds and displays an object that represents the map image that cannot be changed in display as if it was displayed on a display screen. This gives the user the impression that the map image is a fixed image displayed on a TV screen or the like, and allows the user to intuitively recognize that the map image cannot be changed. It becomes.

In a preferred embodiment of the above display device, the detecting means detects an operation by a touch panel. That is, the detection unit detects a user operation on the touch panel provided in the display unit.

In one aspect of the above display device, the map image that cannot be changed is either an image indicating a guide route or an image indicating a guide point. This is because the display of the screen showing the guide route (for example, the screen displaying the entire guide route) and the screen showing the guide point should be maintained and should not be changed.

In still another aspect of the present invention, a navigation device that can be mounted on a mobile object that displays a map image based on map data includes a detection unit that detects an operation of changing the display of the map image, and a traveling state of the mobile object Or a prohibiting unit that prohibits an operation of changing the display of the map image in accordance with an update state of the map data, and detected by the detecting unit when the prohibiting unit does not prohibit an operation of changing the display. A first display control means for changing the display of the map image according to an operation; and an object indicating that the display cannot be changed when the prohibiting means prohibits a display change operation. And a second display control means for displaying.

In the above navigation device, the prohibiting means prohibits the operation of changing the display of the map image according to the traveling state of the mobile object or the update status of the map data. For example, the prohibiting unit prohibits an operation of changing the display of the map image while the mobile object is traveling or the map data is being updated. The first display control means changes the display of the map image according to the operation detected by the detecting means when the prohibiting means does not prohibit the display changing operation. On the other hand, when the prohibiting unit prohibits the display change operation, the second display control unit adds an object indicating that the display cannot be changed to the map image for display. Thereby, in the situation where the operation of changing the display of the map image is prohibited, it is possible to appropriately prevent the user from performing the operation.

In still another aspect of the present invention, a control method executed by a display device that displays a map image based on map data includes a detection step of detecting an operation for changing the display of the map image, and the display change of the map image. A first display control step for changing the display of the map image according to the operation detected by the detection step, and the map image is an image that cannot be changed. And a second display control step of adding an object indicating that the display cannot be changed to the map image for display.

In still another aspect of the present invention, a program executed by a display device that has a computer and displays a map image based on map data, detects the operation of changing the display of the map image. First display control means for changing the display of the map image according to the operation detected by the detection means when the map image is an image for which the display change operation is possible, the map image being a display change operation If the image cannot be displayed, an object indicating that the display cannot be changed is added to the map image and displayed as a second display control unit.

The above program can be suitably handled in a state of being recorded on a recording medium.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(1) Device Configuration FIG. 1 shows a configuration of a vehicle navigation device 1 to which the present invention is applied. As shown in FIG. 1, the navigation device 1 includes a self-supporting positioning device 10, a GPS receiver 18, a system controller 20, a disk drive 31, a data storage unit 36, a communication interface 37, a communication device 38, an interface 39, and a display unit 40. A voice output unit 50 and an input device 60.

The self-supporting positioning device 10 includes an acceleration sensor 11, an angular velocity sensor 12, and a distance sensor 13. The acceleration sensor 11 is made of, for example, a piezoelectric element, detects vehicle acceleration, and outputs acceleration data. The angular velocity sensor 12 is composed of, for example, a vibrating gyroscope, detects the angular velocity of the vehicle when the direction of the vehicle is changed, and outputs angular velocity data and relative azimuth data. The distance sensor 13 measures a vehicle speed pulse composed of a pulse signal generated with the rotation of the vehicle wheel.

The GPS receiver 18 receives radio waves 19 carrying downlink data including positioning data from a plurality of GPS satellites. The positioning data is used to detect the absolute position of the vehicle (hereinafter referred to as “current position”) from latitude and longitude information.

The system controller 20 includes an interface 21, a CPU (Central Processing Unit) 22, a ROM (Read Only Memory) 23, and a RAM (Random Access Memory) 24, and controls the entire navigation device 1. Although details will be described later, the system controller 20 corresponds to an example of “detection means”, “prohibition means”, “first display control means”, and “second display control means” in the present invention.

The interface 21 performs an interface operation with the acceleration sensor 11, the angular velocity sensor 12, the distance sensor 13, and the GPS receiver 18. From these, vehicle speed pulses, acceleration data, relative azimuth data, angular velocity data, GPS positioning data, absolute azimuth data, and the like are input to the system controller 20. The CPU 22 controls the entire system controller 20. The ROM 23 includes a nonvolatile memory (not shown) in which a control program for controlling the system controller 20 is stored. The RAM 24 stores various data such as route data preset by the user via the input device 60 so as to be readable, and provides a working area to the CPU 22.

A system controller 20, a disk drive 31 such as a CD-ROM drive or a DVD-ROM drive, a data storage unit 36, a communication interface 37, a display unit 40, an audio output unit 50 and an input device 60 are mutually connected via a bus line 30. It is connected to the.

The disk drive 31 reads and outputs content data such as music data and video data from a disk 33 such as a CD or DVD under the control of the system controller 20. The disk drive 31 may be either a CD-ROM drive or a DVD-ROM drive, or may be a CD and DVD compatible drive. The data storage unit 36 is configured by, for example, an HDD and stores various data used for navigation processing such as map data. Based on the map data read from the data storage unit 36, the system controller 20 displays a map image, or sets a route (guidance route) from the departure point to the destination for route guidance.

The communication device 38 includes, for example, an FM tuner, a beacon receiver, a mobile phone, a dedicated communication card, and the like, and acquires information distributed from a VICS (Vehicle Information Communication System) center from the radio wave 39 (note that “VICS”). Is a registered trademark). The communication device 38 is configured to be able to perform wireless communication with a predetermined server device, and obtains information (for example, map data) distributed from the server device from the radio wave 39. The interface 37 performs an interface operation of the communication device 38 and inputs information acquired by the communication device 38 to the system controller 20 or the like.

The display unit 40 displays various display data on a display device such as a display under the control of the system controller 20. The display unit 40 displays a map image or the like based on the map data read from the data storage unit 36 by the system controller 20 on the display screen. The display unit 40 includes a graphic controller 41 that controls the entire display unit 40 based on control data sent from the CPU 22 via the bus line 30, and image information that can be displayed immediately, such as a VRAM (Video） RAM) memory. A buffer memory 42 that temporarily stores, a display control unit 43 that controls display of a display 44 such as a liquid crystal based on image data output from the graphic controller 41, and a display 44 are provided. The display 44 functions as an image display unit, and includes, for example, a liquid crystal display device having a diagonal size of about 5 to 10 inches and is mounted near the front panel in the vehicle.

The audio output unit 50 performs D / A (Digital-to-Analog) conversion of audio digital data sent from the CD-ROM drive 31, DVD-ROM 32, RAM 24, or the like via the bus line 30 under the control of the system controller 20. A D / A converter 51 to perform, an amplifier (AMP) 52 that amplifies the audio analog signal output from the D / A converter 51, and a speaker 53 that converts the amplified audio analog signal into sound and outputs the sound into the vehicle. It is prepared for.

The input device 60 includes keys, switches, buttons, a remote controller, a voice input device, and the like for inputting various commands and data. The input device 60 is disposed around the front panel and the display 44 of the main body of the in-vehicle electronic system mounted in the vehicle. The display 44 is configured in a touch panel system, and a touch panel provided on the display screen of the display 44 also functions as the input device 60. For example, the system controller 20 detects a scroll operation performed by the user on the touch panel provided on the display 44 based on an output signal from the input device 60, and the map displayed on the display 44 according to the detected scroll operation. Control to scroll the image.

(2) Display Control Method Next, a display control method performed by the system controller 20 in the navigation device 1 in this embodiment will be described.

In this embodiment, when the map image is an image that cannot be scrolled, the system controller 20 displays the map image in such a manner that the user can intuitively recognize that the scroll operation cannot be performed. Specifically, for the map image that cannot be scrolled, the system controller 20 displays an image obtained by processing the map image. In this case, the system controller 20 adds an object indicating that the scroll operation cannot be performed to the map image that cannot be scrolled for display. On the other hand, when the map image is an image that can be scrolled, the system controller 20 displays the map image as it is without processing it. Hereinafter, an image obtained by processing a map image is referred to as a “processed map image”. On the other hand, a map image displayed as it is without processing the map image is referred to as a “normal map image”.

According to the present embodiment, by displaying the processed map image, the user can intuitively recognize that the map image cannot be scrolled. Therefore, it is possible to appropriately suppress the user performing the scroll operation while the map image that cannot be scrolled is displayed.

Although details will be described later, “a map image that cannot be scrolled” refers to, for example, a map image displayed on a screen that should maintain the display of the entire route, a guide point, etc., a running state, a map data update status, etc. Is a map image that is displayed when the scroll operation should be prohibited. In other words, the system controller 20 is displayed, for example, when displaying a screen that should maintain the display of the entire route, the guide point, or the like, or when the scroll operation should be prohibited depending on the driving state or the update status of the map data. The map image is treated as a “map image that cannot be scrolled”, and a processed map image obtained by processing the map image is displayed.

Hereinafter, the display control method according to the present embodiment will be described more specifically.

(2-1) Specific Example of Processed Map Image Here, a specific example of the processed map image according to the present embodiment is shown. As described above, the processed map image is an image obtained by processing a map image that cannot be scrolled.

(2-1-1) First Example In the first example, when the map image is an image that cannot be scrolled, the system controller 20 adds an object that expresses the map image as written on a paper medium. The processed map image is displayed. Specifically, in the first example, the system controller 20 displays a processed map image with a frame attached to the map image.

FIG. 2 shows a diagram for explaining the processed map image according to the first example. FIG. 2A shows an example of a normal map image for comparison. The normal map image is displayed when the map image is an image that can be scrolled. The normal map image is a map image displayed as it is and is not processed.

FIG. 2B shows an example of a processed map image according to the first example. As shown in FIG. 2B, in the processed map image according to the first example, an image g1 indicating a frame is attached to the map image and displayed. That is, in the processed map image, the map written on the paper medium is expressed as if it was stored in the frame.

According to the processed map image according to the first example, it is possible to give the user an impression that the paper is only the area where the map is written. Therefore, the user can intuitively recognize that the map image cannot be scrolled.

(2-1-2) Second Example Also in the second example, as in the first example, when the map image is an image that cannot be scrolled, the system controller 20 displays the map image on a paper medium. The processed map image with the object to be expressed as it is added is displayed. However, in the second example, the processed map image is displayed in an expression different from the expression obtained by adding a frame to the map image as shown in the first example.

FIG. 3 shows a diagram for explaining the processed map image according to the second example. FIG. 3A shows one example of the processed map image according to the second example. As shown in FIG. 3A, in the processed map image in this example, the map is expressed as if it were written on a scroll. FIG. 3B shows another example of the processed map image according to the second example. As shown in FIG. 3B, the processed map image in this example is expressed as a map is written on torn old paper. In other words, it is expressed like an old map. FIG. 3C shows still another example of the processed map image according to the second example. As shown in FIG. 3C, the processed map image in this example is expressed as if the map is written on the creased paper.

The processed map image according to the second example can also give the user the impression that the map is only the area where the map is written, and intuitively tell the user that the map image cannot be scrolled. It will be possible to recognize.

(2-1-3) Third Example Also in the third example, as in the first and second examples, the system controller 20 determines that the map image is an image that cannot be scrolled. Is displayed as a processed map image to which an object that expresses the image as described on a paper medium is added. However, in the third example, the processed map image is displayed with an expression different from the expressions shown in the first example and the second example. Specifically, in the third example, the system controller 20 displays a processed map image expressed as if the map is fixed.

FIG. 4 shows an example of a processed map image according to the third example. As shown in FIG. 4, in the processed map image according to the third example, an image g2 indicating a thumbtack (in other words, a pin) is attached to the map image and displayed. That is, in the processed map image, the paper medium on which the map is written is expressed as if it is fastened with a thumbtack.

According to the processed map image according to the third example, it is possible to give the user an impression that the map is fixed, and to make the user intuitively recognize that the map image cannot be scrolled. It becomes possible.

(2-1-4) Fourth Example In the fourth example, unlike the first to third examples, when the map image is an image that cannot be scrolled, the system controller 20 detects the end of the map image. A processed map image expressed as being at the end is displayed.

FIG. 5 shows an example of the processed map image according to the fourth example. As shown in FIG. 5, in the processed map image according to the fourth example, the periphery of the map image is surrounded by a black image. More specifically, the processed map image is expressed so that the end of the map image fades out.

According to the processed map image according to the fourth example, it is possible to give the user an impression that the end of the map image is the end, and to make the user intuitively recognize that the map image cannot be scrolled. It becomes possible.

(2-1-5) Fifth Example In the fifth example, unlike the first to fourth examples, when the map image is an image that cannot be scrolled, the system controller 20 A processed map image expressed as if it was not touched is displayed.

FIG. 6 shows an example of the processed map image according to the fifth example. As shown in FIG. 6, in the processed map image according to the fifth example, an image representing a glass surface is displayed over the map image. That is, in the processed map image, the map is expressed as if it were contained in a glass case.

According to the processed map image according to the fifth example, it is possible to give the user an impression that the map is untouchable, such as a work of art, and to the user that the map image cannot be scrolled. Intuitive recognition is possible.

Note that the processed map image according to the fifth example can be handled as an image to which an object that expresses the map image as described on a paper medium is added from another viewpoint.

(2-1-4) Sixth Example In the sixth example, unlike the first to fifth examples, when the map image is an image that cannot be scrolled, the system controller 20 displays the map image on the TV screen. The processed map image to which the object expressed as if it is displayed is added.

FIG. 7 shows an example of a processed map image according to the sixth example. As shown in FIG. 7, in the processed map image according to the sixth example, the map image is represented as a fixed image displayed on the television screen. Specifically, the processed map image is displayed in an external shape such as a television display, and an image representing a glass surface is superimposed on the map image.

According to such a processed map image according to the sixth example, it is possible to give the user an impression that the map image is a fixed image displayed on the television screen, and that the map image cannot be scrolled by the user. Can be recognized intuitively.

(2-2) Conditions for Displaying Processed Map Image Next, specific conditions (first to fourth conditions) for displaying the processed map image as described above will be described. In the present embodiment, the system controller 20 treats the map image to be displayed at that time as a map image that cannot be scrolled when at least one of first to fourth conditions described later is satisfied, and the map image Is displayed, and the scroll operation by the user is prohibited (that is, the map image is not scrolled even if the user performs the scroll operation).

(2-2-1) First Condition The system controller 20 uses a condition such as displaying the entire set route as the first condition, and when the first condition is satisfied (that is, the entire route is Display the processed map image when it should be displayed). Examples of displaying the entire route include when the route setting is completed and when the set route is edited. The reason why the processed map image is displayed when the entire route is displayed in this way is that the display of the entire route should be maintained and should not be scrolled.

(2-2-2) Second Condition The system controller 20 uses a condition such as displaying an image indicating a guidance point (hereinafter referred to as “guidance point image”) as the second condition. When the condition is satisfied (that is, when the guidance point image is to be displayed), the processed map image is displayed. The display of the guide point image is performed during route guidance. For example, as the guidance point image, an enlarged view of an intersection or a guidance image (an image used for guiding a user, such as a direction for guiding the user, a name of the guidance point, a distance to the guidance point, and the like). ) And the like. The reason why the processed map image is displayed when the guide point image is displayed in this way is that the display of the guide point should be maintained and should not be scrolled.

(2-2-3) Third condition The system controller 20 uses a condition based on the running state of the vehicle as the third condition. Specifically, the system controller 20 uses the condition that the vehicle is traveling as the third condition, and displays the processed map image when the third condition is satisfied (that is, when the vehicle is traveling). Display. This is because when the vehicle is traveling, the user's scroll operation on the map image should be prohibited from the viewpoint of ensuring driving safety.

For example, whether or not the vehicle is traveling is determined based on the vehicle speed or the parking brake. In one example, the system controller 20 determines that the vehicle is traveling based on the vehicle speed pulse measured by the autonomous positioning device 10 when the speed corresponding to the vehicle speed pulse is equal to or higher than a predetermined speed. In another example, the system controller 20 determines that the vehicle is traveling when the parking brake is off.

(2-2-4) Fourth Condition The system controller 20 uses a condition based on the update status of the map data as the fourth condition. Specifically, the system controller 20 uses the condition that the map data stored in the data storage unit 36 is being updated as the fourth condition, and when the fourth condition is satisfied (that is, the map data is updated). If it is in the middle), display the processed map image. The update of the map data is distributed from a predetermined server device when traveling in a place where no map data is stored in the data storage unit 36 (in this case, for example, a blank map image is displayed). It is carried out with the map data. The reason why the processed map image is displayed when the map data is updated in this way is that the appropriate map is not displayed while the map data is being updated, so the scroll operation should be prohibited. is there.

(3) Modified Examples Hereinafter, modified examples suitable for the above-described embodiments will be described. It should be noted that the following modifications can be applied to the above-described embodiments in any combination.

(3-1) Modification 1
In the above, although the Example which applied this invention to the navigation apparatus 1 was shown, this invention is applicable also to portable terminal devices, such as a smart phone which has a display function of a map image. Even when the present invention is applied to a portable terminal device, as in the above-described embodiment, when at least one of the first to fourth conditions is satisfied, the first to sixth examples are shown. Such a processed map image may be displayed. In addition, when displaying a map image in a portable terminal device, it is good also as using the map data memorize | stored in memory etc., and good also as using the map data delivered from the server apparatus.

(3-2) Modification 2
In the above, although the Example which applied this invention to the navigation apparatus 1 was shown, this invention is applied also to the system which consists of vehicle-mounted devices, such as a navigation apparatus mounted in the vehicle, and portable terminal devices, such as a smart phone. be able to.

In one example, the present invention can be applied to a system that displays a map image generated by a portable terminal device on a vehicle-mounted device. In such a system, the on-vehicle device side processes the map image (first to fourth) obtained by processing the map image generated by the portable terminal device when at least one of the first to fourth conditions is satisfied. (Image as shown in the sixth example) can be displayed. On the vehicle-mounted device side, if the map image generated by the portable terminal device is generated by a device other than the map display application that can be operated on the vehicle-mounted device side, the map image is generated by the portable terminal device. A processed map image obtained by processing the map image can be displayed. On the other hand, when the map image generated by the portable terminal device is generated by an application for map display that can be operated on the vehicle-mounted device side, the map image is generated by the portable terminal device on the vehicle-mounted device side. The displayed map image can be displayed as it is (that is, an unprocessed map image can be displayed).

In another example, the present invention is an application whose function is opened for the first time when the vehicle-mounted device and the portable terminal device cooperate with each other (in one example, an application that displays traffic jam information. The present invention can also be applied to a system using (installed in the apparatus). In such a system, when the portable terminal device is not connected to the vehicle-mounted device, the application cannot be executed. Therefore, on the vehicle-mounted device side, the processed map image as shown in the first to sixth examples. Can be displayed. On the other hand, when the portable terminal device is connected to the vehicle-mounted device, the vehicle-mounted device side executes the application and cancels the display of the processed map image as shown in the first to sixth examples. That is, a map image corresponding to the application can be displayed.

(3-3) Modification 3
In the above, the embodiment in which the present invention is applied to the scroll operation has been described, but the present invention can also be applied to operations other than the scroll operation. That is, in the above-described embodiment, the scroll operation is exemplified as the “display change operation” in the present invention. Various operations such as changes can be applied.

In the above description, the embodiment in which the present invention is applied to display of a map image has been described. However, the present invention can also be applied to an image other than a map image (for example, a photograph or a reproduced image of content).

The present invention can be applied to various display devices that display images.

1 navigation device 20 system controller 36 data storage unit 40 display unit 60 input device

Claims (10)

A display device for displaying a map image based on map data,
Detecting means for detecting an operation of changing the display of the map image;
First display control means for changing the display of the map image in accordance with the operation detected by the detection means when the map image is an image that can be changed in display;
When the map image is an image that cannot be changed in display, a second display control means for displaying an object indicating that the display cannot be changed added to the map image;
A display device comprising: The display device according to claim 1, wherein the second display control means adds and displays an object that expresses the map image that cannot be changed as a display on a paper medium. The display device according to claim 2, wherein the second display control means displays a map image on which a display change operation cannot be performed with a frame. The display device according to claim 1, wherein the second display control means adds and displays an object that represents the map image that cannot be changed in display as if it was displayed on a display screen. The display device according to any one of claims 1 to 4, wherein the detection unit detects an operation by a touch panel. The display device according to any one of claims 1 to 5, wherein the map image on which the display change operation cannot be performed is one of an image indicating a guide route and an image indicating a guide point. A navigation device that can be mounted on a mobile object that displays a map image based on map data,
Detecting means for detecting an operation of changing the display of the map image;
Inhibiting means for prohibiting the operation of changing the display of the map image according to the traveling state of the mobile object or the update status of the map data
First display control means for changing the display of the map image according to the operation detected by the detecting means when the prohibiting means does not prohibit the operation of changing the display;
A second display control means for displaying an object indicating that the display cannot be changed by adding to the map image when the prohibiting means prohibits a display change operation;
A navigation device comprising: A control method executed by a display device that displays a map image based on map data,
A detection step of detecting an operation of changing the display of the map image;
A first display control step of changing the display of the map image according to the operation detected by the detection step when the map image is an image that can be changed;
When the map image is an image that cannot be changed in display, a second display control step of adding an object indicating that the display cannot be changed to the map image for display;
A control method comprising: A program executed by a display device that has a computer and displays a map image based on map data,
The computer,
Detecting means for detecting an operation of changing the display of the map image;
First display control means for changing the display of the map image in accordance with the operation detected by the detection means when the map image is an image that can be changed in display;
Second display control means for adding an object indicating that display cannot be changed to the map image and displaying the map image when the map image is an image that cannot be changed.
A program characterized by functioning as A recording medium on which the program according to claim 9 is recorded.

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