JP2012018219A - Display device and program therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of properly switching images depending on a processing load, and a program therefor.SOLUTION: A display device displays an image on a display thereof (S101); when it is determined that a switching button is selected (S102: YES), based on a processing load of a CPU of a controlling unit 10, determines a division number of an image as a reference when the image is switched (S104, S105); and divides the image based on the determined division number to switch from the currently displayed image to another image (S106). Accordingly, the display device divides the image based on the division number depending on the processing load of the CPU of the controlling unit 10 to switch the image displayed on the display. The display device can properly switch the image displayed on the display depending on the processing load of the CPU of the controlling unit 10, thereby allowing a user to easily recognize a response of a navigation device to user's operations.

Description

  The present invention relates to a display device that displays an image.

  Conventionally, it is known to perform screen switching by selecting an operation button, for example, as in a navigation device. For example, in Patent Document 1, a plurality of operation buttons are displayed for each hierarchy, and when an operation button is selected, the hierarchy of the operation screen is sequentially shifted according to the selected operation button.

JP 2010-38620 A

However, in Patent Document 1, there is a problem that even if the screen is switched, the static screen is continuous, so that it is difficult for the user to understand the response of the navigation device to the operation.
Therefore, a technique has been proposed in which image data is divided and the screen is dynamically switched. At this time, the larger the number of divisions of the image data, the smoother the moving image can be made. On the other hand, when the number of divisions of the image data is large, there is a problem that the calculation load increases and a feeling of shakiness is produced.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display device and a program capable of appropriately switching images according to a calculation load.

  The display device according to claim 1 is a display unit that displays an image, a load information acquisition unit that acquires calculation load information relating to a calculation load when performing various calculation processes, and an image switching method based on the calculation load information. When the user selects the division number determining means for determining the number of divisions of the image as a reference and the switching button for switching the displayed image, the image is divided based on the division number, and the currently displayed image Switching means for switching from to other images. Thereby, the image is divided based on the number of divisions determined according to the calculation load, and the displayed image is switched. Therefore, the image can be switched appropriately according to the calculation load, and the display device for the operation can be switched. The reaction becomes easier to understand.

  The display device according to claim 2 is mounted on a vehicle. The display device further includes travel determination means for determining whether the vehicle is traveling or stopped. The calculated load information is a determination as to whether the vehicle is traveling or stopped by the traveling determination means. The division number determining means determines the division number when it is determined that the vehicle is traveling to a value smaller than the division number when it is determined that the vehicle is stopped. Thereby, when the vehicle is running, the calculation load related to the switching of the images can be reduced by reducing the number of divisions of the images serving as a reference when switching the images.

As described above, the display device has been described. However, the present invention can also be realized as the following program.
That is, display means for displaying an image, load information acquisition means for acquiring calculation load information related to calculation load when performing various calculation processes, and determining the number of divisions of an image serving as a reference when switching images based on the calculation load information When the user selects the division number determining means to perform and the switching button for switching the displayed image, the switching is performed to divide the image based on the number of divisions and switch from the currently displayed image to another image. It is a program that causes a computer to function as means. By executing such a program, the same effects as those of the above-described display device can be obtained.

It is a block diagram which shows the structure of the navigation apparatus by one Embodiment of this invention. It is explanatory drawing explaining the dynamic switching of the image displayed on the display by one Embodiment of this invention. It is a flowchart explaining the division number change process by one Embodiment of this invention.

Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the drawings.
(One embodiment)
A display device according to an embodiment of the present invention is applied to a navigation device mounted on a vehicle. FIG. 1 is a block diagram showing an overall configuration of a navigation device 1 as a display device according to an embodiment of the present invention. The navigation device 1 is configured with a control unit 10 as a center. The control unit 10 includes an operation switch group 20, a map data storage unit 30, an image data storage unit 35, a current position calculation unit 40, a speaker 50, and the like. The display 60 is connected.

The control unit 10 is configured as a computer including a CPU, a ROM, a RAM, an I / O, and a bus line that connects them, and controls the entire system.
The operation switch group 20 includes a touch switch integrated with the display 60, a mechanical switch, a remote control device, or the like, and is used for various inputs.

The map data storage unit 30 is a storage device realized as, for example, a hard disk device (HDD). Although the HDD is used here, another medium such as a DVD-ROM or a memory card may be used.
The map data storage unit 30 stores so-called map matching data for improving the accuracy of position detection, map data for searching for a route, and image data for drawing a map on the display 60. The map data includes various data, one of which is facility information about the facility. The facility information is specifically POI (Point Of Interest) information stored in association with an ID that identifies the facility. The POI information includes facility name, facility ID, position coordinates, information indicating type (genre), and the like.

  The image data storage unit 35 stores image data for displaying a search screen or the like on the display 60, and includes the same HDD as the map data storage unit 30. Of course, other media such as a memory card may be used.

  The current position calculation unit 40 calculates the current position of the vehicle. For example, it has a geomagnetic sensor, a gyroscope, a distance sensor, a GPS (Global Positioning System) receiver that receives radio waves from a satellite, and the like. Since these have errors of different properties, they are used while complementing each other. The current position calculation unit 40 can calculate the current position of the vehicle in real time.

The speaker 50 is for outputting sound, and is used, for example, when performing route guidance by sound. The display 60 is a color display device having a screen configured using liquid crystal or the like. A map, facility information, and the like are displayed via the display 60.
In addition, a vehicle speed sensor 70 that detects the traveling speed of the vehicle is connected to the control unit 10.

  By the way, in this embodiment, if the switching button which switches the image displayed on the display 60 via the operation switch group 20 is selected by the user, it will change to the image according to the switching button selected from the image currently displayed. Then, the image displayed on the display 60 is dynamically switched.

Here, an example of a method for dynamically switching the image displayed on the display 60 from the currently displayed image to another image will be described.
First, as shown in FIG. 2A, the currently displayed image is divided into a plurality of regions. In the example shown in FIG. 2A, the currently displayed image is divided into a predetermined number (32 in this example) of regions in the direction parallel to the x-axis. That is, in FIG. 2A, it is divided in the horizontal direction of the paper. Here, the image is divided only in the direction parallel to the x-axis, but may be divided in the direction parallel to the y-axis, or may be divided in the direction parallel to the x-axis and the direction parallel to the y-axis. Good.

Next, moving curve data is created. As shown in FIG. 2B, a straight line L1 connecting the upper left end point S1 of the currently displayed image and the point E having coordinates (x _e , 0), and the upper right end point S2 of the currently displayed image. A straight line L2 connecting the point E and the point E is obtained. Further, the movement curves C1 and C2 are calculated by multiplying the straight line L1 and the straight line L2 by a sin wave.

In this embodiment, it is assumed that the displayed image moves so as to be sucked into the point E, and movement of the currently displayed image is performed in two stages. First, as shown in FIG. 2B, the 32 divided image is reduced in the x direction so that the end points in the x direction approach the movement curves C1 and C2 for each divided area. When the end points in the x direction of the divided regions overlap the movement curves C1 and C2, as shown in FIG. 2C, the x coordinate and the y coordinate are changed so as to trace the movement curves C1 and C2. Further, by not displaying an image that exceeds the point E, which is the movement destination coordinate, the operation is such that the currently displayed image is sucked.
Further, by changing the image to be newly displayed in the reverse process described above, the operation jumps from the point E. In this way, the image displayed on the display 60 is dynamically switched from the currently displayed image to another image.

  In this example, the operation is such that the currently displayed image is sucked into the point E with the point E as a reference, and the operation is performed so that other images jump out from the point E. The image displayed on the display 60 is dynamically switched to another image. That is, the point E is a reference position serving as a reference for dynamic display. In other words, the point E is a convergence reference position where the currently displayed image converges to the point E, and a divergence reference position where other images diverge.

  By the way, the larger the number of divisions of the image related to the dynamic switching of the image displayed on the display 60, the smoother the image. On the other hand, if the number of image divisions is large, the calculation load increases and a feeling of shakiness is produced. In particular, as in the present embodiment, when the display device is embodied as the navigation device 1 mounted on a vehicle, the computation load on the control unit 10 such as acquisition of the current position and route guidance is heavy during traveling. Therefore, in the present embodiment, it is assumed that the computation load on the control unit 10 is larger when the vehicle is traveling than when the vehicle is stopped, and the number of divisions related to dynamic switching of images displayed on the display 60 is changed. Therefore, the division number changing process in the present embodiment will be described based on the flowchart shown in FIG.

In the first step S101 (hereinafter, “step” is omitted and simply indicated by the symbol “S”), an image is displayed on the display 60. The image displayed here corresponds to “currently displayed image”.
In S <b> 102, it is determined whether or not the switch button for switching the displayed image has been selected by the user via the operation switch group 20. When it is determined that the switch button 21 is not selected (S102: NO), this determination process is repeated and the display of the currently displayed image is continued. When it is determined that the switching button 21 has been selected (S102: YES), the image displayed instead of the currently displayed image is specified based on the selected switching button, and the process proceeds to S103. An image displayed instead of the currently displayed image corresponds to “another image”.

  In S103, it is determined whether or not the vehicle is traveling. In the present embodiment, the determination is made based on the vehicle speed acquired by the vehicle speed sensor 70, but may be determined based on, for example, a brake sensor. In the present embodiment, the determination result in S103 is used as calculation load information related to the calculation load of the CPU constituting the control unit 10. That is, when the vehicle is traveling, the CPU of the control unit 10 performs a current position acquisition process for acquiring the current position of the vehicle, a route guidance process for guiding the route, a map drawing process associated with the movement of the current position of the vehicle, and the like. Compared with the case where the process is being performed and the vehicle is stopped, the calculation load of the CPU of the control unit 10 is large. Therefore, when it is determined that the vehicle is traveling (S103: YES), it is considered that the calculation load of the CPU of the control unit 10 is large, and the process proceeds to S104. When it is determined that the vehicle is not traveling (S103: NO), it is considered that the calculation load of the CPU of the control unit 10 is small, and the process proceeds to S105.

When it is determined that the vehicle is traveling (S103: YES), that is, when the CPU is subjected to a large calculation load, the image is divided roughly by reducing the number of divisions of the image. The number of image divisions while the vehicle is traveling is determined to be 64, for example.
When it is determined that the vehicle is not traveling (S103: NO), that is, in S105, where the calculation load of the CPU is small, the number of divisions for dividing the image is increased and the image is divided finely. The number of image divisions while the vehicle is stopped is determined to be 128, for example. That is, in the process of S104, the number of divisions when it is determined that the vehicle is traveling is determined to be smaller than the number of divisions when it is determined that the vehicle is stopped.

  In S106, the image is divided based on the number of divisions determined in S104 or S105, and the image is changed or moved for each divided area, thereby switching from the currently displayed image to another image. To end this process. Note that switching from the currently displayed image to another image is performed so that the currently displayed image is sucked into the reference position, for example, as in the above-described example, and the other image jumps out of the reference position. To display.

  As described above in detail, an image is displayed on the display 60 (S101), and when it is determined that the switching button has been selected (S102: YES), when switching images based on the computation load of the CPU of the control unit 10 The reference image division number is determined (S104, S105), the image is divided based on the determined division number, and the currently displayed image is switched to another image (S106). As a result, the image is divided based on the number of divisions determined according to the calculation load of the CPU of the control unit 10 and the image displayed on the display 60 is switched. Therefore, the display according to the calculation load of the CPU of the control unit 10 is displayed. The image displayed on 60 can be switched appropriately, and the response of the navigation device 1 to the operation becomes easy to understand.

  In addition, the navigation device 1 of this embodiment is mounted on a vehicle, determines whether the vehicle is running or stopped (S102), and uses the determination result as calculation load information. Then, the number of divisions when it is determined that the vehicle is running (S103: YES) is determined to be smaller than the number of divisions when it is determined that the vehicle is stopped (S103: NO) ( S104, S105).

  When the vehicle is running, the CPU of the control unit 10 performs current position acquisition processing for acquiring the current position of the vehicle, route guidance processing for guiding the route, map drawing processing associated with movement of the current position of the vehicle, and the like. Compared to the case where the vehicle is stopped, the calculation load of the CPU of the control unit 10 is large. Moreover, it is not desirable that the navigation-related processes such as the current position acquisition process, the route guidance process, and the map drawing process become slow as the calculation load of the switching process related to the switching of the image displayed on the display 60 increases. Furthermore, when the vehicle is running, the driver cannot gaze at the display 60. Therefore, the switching speed is required rather than the smoothness of the switching image. Therefore, when the vehicle is running (S103: YES), the calculation load related to the image switching is reduced by reducing the number of divisions of the image serving as a reference when switching the image as compared to when the vehicle is stopped (S104). be able to. In addition, the images can be switched quickly compared to when the number of image divisions is increased.

  In this embodiment, the control unit 10 constitutes “display means”, “load information acquisition means”, “division number determination means”, “switching means”, and “travel determination means”. Further, S101 in FIG. 3 corresponds to processing as a function of “display means”, S103 corresponds to processing as functions of “load information acquisition means” and “running determination means”, and S104 and S105 are “divided”. This corresponds to processing as a function of “number determining means”, and S106 corresponds to processing as a function of “switching means”.

As mentioned above, this invention is not limited to the said embodiment at all, In the range which does not deviate from the meaning of invention, it can implement with a various form.
(A) In the above embodiment, the calculation load information is a determination as to whether the vehicle is traveling or stopped, but in other embodiments, the calculation load information is used to determine whether the vehicle is traveling or stopped. Not exclusively. For example, an actual measurement value of the CPU load factor may be used as the calculation load information.

  (A) In the above embodiment, the currently displayed image is sucked into the reference position, and another image is popped out from the reference position. In another embodiment, the reference position serving as a reference for dynamic display can be set to an arbitrary position. The reference position may be a plurality of points. The switching operation from the currently displayed image to another image may be any switching operation such as wipe, blind, checker, and the like. In the above embodiment, the currently displayed image and other images are divided and the image displayed on the display is dynamically switched. However, in the other embodiments, the currently displayed image or other images are switched. Only one of the images may be divided and the image displayed on the display may be dynamically switched.

  (C) In the above embodiment, the display device is embodied as a navigation device and is mounted on a vehicle. In another embodiment, not only a navigation device but also various devices capable of displaying images, such as a music player, can be used. The display device may not be mounted on the vehicle. Note that the “map data storage unit”, “current position calculation unit”, and “speaker” in the display device of the above embodiment may be omitted. The display may be configured as a device different from the display device having the control unit.

  (D) In the above embodiment, the control unit constitutes “display means”, “load information acquisition means”, “division number determination means”, “switching means”, and “travel determination means”. In another embodiment, the program may be a program that causes a computer to function as “display unit”, “load information acquisition unit”, “division number determination unit”, “switching unit”, and “running determination unit”. It is good also as a storage medium which memorize | stores.

1. Navigation device (display device)
10. Control unit (display means, load information acquisition means, division number determination means, switching means, travel determination means)
DESCRIPTION OF SYMBOLS 20 ... Operation switch group 30 ... Map data storage part 35 ... Image data storage part 40 ... Current position calculation part 50 ... Speaker 60 ... Display 70 ... Vehicle speed sensor

Claims (3)

Display means for displaying an image;
Load information acquisition means for acquiring calculation load information relating to calculation load when performing various calculation processes;
A division number determining means for determining a division number of an image serving as a reference when switching images based on the calculation load information;
When a switching button for switching the displayed image is selected by the user, a switching unit that divides the image based on the number of divisions and switches from the currently displayed image to another image;
A display device comprising: The display device according to claim 1 mounted on a vehicle,
The vehicle further comprises travel determination means for determining whether the vehicle is traveling or stopped,
The calculation load information is a determination as to whether the vehicle is traveling or stopped by the traveling determination means,
The division number determining means determines the division number when the vehicle is determined to be traveling to a value smaller than the division number when the vehicle is determined to be stopped. Characteristic display device. Display means for displaying images,
Load information acquisition means for acquiring calculation load information relating to calculation load when performing various calculation processes;
A division number determining means for determining a division number of an image serving as a reference when switching images based on the calculation load information;
And a switching unit that divides the image based on the number of divisions and switches from the currently displayed image to another image when a switching button for switching the displayed image is selected by the user,
A program characterized by causing a computer to function.

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