JP4466605B2 - Map display device and program - Google Patents

Description

  The present invention relates to a map display device that is mounted on a mobile body and displays a current position and a map image, a guide image, and the like around it.

  A technique is known in which a position is detected by a GPS or the like as a vehicle travels, map data around it is read from a CD-ROM or DVD-ROM, and displayed on a display together with a vehicle mark indicating the position of the vehicle. Yes. In addition, on the display screen, for example, a menu screen showing functions that can be instructed by the user, such as enlargement / reduction / movement of the map, and a window for displaying information such as intersection information and sightseeing spot information are synthesized and displayed. Yes. For example, an information display window or the like is displayed while being animated for the purpose of, for example, displaying with a high-class feeling.

  In addition, a guidance route from the departure point to the destination is set, and the guidance route is displayed on a map, and information windows such as intersection information, traffic jam information, and sightseeing spot information are displayed according to the current position of the vehicle. It also has a function to synthesize and display on the display screen.

  However, the menu screen and information display screen displayed on the map screen in this way are displayed in a predetermined method and at a predetermined position regardless of the moving speed of the host vehicle and the route guidance status. Therefore, various inconveniences occurred. For example, when displaying an information display window or the like while animating, it is not preferable to be distracted by the animation when the host vehicle is traveling at high speed. Also, it is not preferable that the guide route or the map around the guide route is difficult to see on the menu screen or the information display window.

  Therefore, an object of the present invention is to realize a more appropriate map display in consideration of the route guidance status and the like.

The map display device according to claim 1 made to achieve the above object is mounted on a mobile body and can display a map screen so that a guidance route for route guidance can be identified. Is a map display device capable of combining and displaying another screen, but the display position of the guide route in the map screen specified by the display position specifying means and the display position of the other screen combined and displayed on the map screen Are overlapped, the display control means changes and controls at least one of the display method of the other screen and the display method of the guide route.
Specifically, the following control is performed. Change control the display position of the other screens to synthesize displayed as induction route is not hidden hidden in the map screen. Further, when the induction route is hidden in at least either one alone is the map screen of the control of the display position of the control or guidance route display positions of the other screen, change the display size of the other screen synthesizing display Control. Also, If changing the display size of the other screens to be synthesized and displayed inductive route is hidden, the guide route is transmitted through synthesis processing the map screen and other screens so as to be seen by transmitted.

Various examples of other screens are conceivable. For example, as shown in claim 4 , it includes at least one of a function menu screen such as a map enlargement / reduction / movement and a current position peripheral information screen such as intersection information. Can be considered.

According to the map display device of the present invention, when a guidance route is displayed, it is preferable that the guidance route and its surrounding map be in a state where they can be seen as much as possible. . Also, depending on the display size of the other screens located and synthesis of the guidance route, only to control the display position, since in some cases the induction route is hidden, the display size of the other screens to be synthesized and displayed Change control. In other words, the display is reduced. Further, since the envisaged if be reduced to limit induction route is hidden, in such a case, the guide route is transmitted through synthesis processing the map screen and other screens so as to be seen by transmitted. By these display controls, a more appropriate map display can be realized.

However, if the image is reduced too much, the contents to be transmitted to the user on other screens are not sufficiently transmitted. Therefore, it is considered that there is a limit of reduction in reality. Therefore, it is preferable to give priority to the display position if it can be dealt with first. That is, as shown in claim 2 , if both control of the display position of another screen and control of the display position of the guidance route can be performed, the display size is not displayed for the first time when both of them are still not supported. Change.

Note that these are the ideas to prioritize the display when there is a guide route. When the guide route itself is not displayed, another screen to be synthesized and displayed is displayed as shown in claim 3 . What is necessary is just to display at a position with a predetermined size.

The invention according to claim 5, a computer, a program to function as the display position specifying means及beauty table示制control means in the above-described map display device.

  In this case, the program is stored in a computer-readable recording medium such as FD, MO, DVD, CD-ROM, hard disk, memory card, etc., and the stored program is loaded into a computer system as necessary. It can be used by starting. In addition, the ROM or backup RAM may be recorded as a computer-readable recording medium, and the ROM or backup RAM may be incorporated into a computer system for use. Further, the program is not limited to the program stored in the recording medium, and may be used by being loaded and started via a network.

Embodiments to which the present invention is applied will be described below with reference to the drawings. Needless to say, the embodiments of the present invention are not limited to the following examples, and can take various forms as long as they belong to the technical scope of the present invention.
[First embodiment]
Since the map display device is applied to the navigation system in the first embodiment, the schematic configuration of the navigation system 1 will be described with reference to FIG. The navigation system 1 is mounted on a vehicle as a moving body, and includes a vehicle position detection device 100, a vehicle speed detection device 101, a central processing unit (CPU) 102, a display image processing / synthesis device 103, a map data storage device 105, A ROM 106 for storing various programs, a RAM 107 for storing various processing results, an operation system I / F 109, a display control device 111, and the like are connected via a bus line 104.

  The vehicle position detection device 100 includes a known gyroscope, a GPS receiver for GPS (Global Positioning System) that detects the position of the vehicle based on radio waves from a satellite, and the like. Since each of these sensors has an error having a different property, they are configured to be used while being interpolated by a plurality of sensors. Depending on the accuracy, a part of the above may be used, and a geomagnetic sensor, a steering rotation sensor, a wheel sensor of each rolling wheel, or the like may be used.

The vehicle speed detecting device 101 detects the (moving) speed of the vehicle based on, for example, the number of vehicle speed pulses generated in proportion to the rotation angle of the drive shaft of the vehicle.
The CPU 102 controls the entire navigation system 1, and the display image processing / synthesizing device 103 executes a calculation for synthesizing a menu screen or an information display screen with the display image.

  The map data storage device 105 stores various data including map matching data and map data for improving the accuracy of position detection. The road data is a map formed by connecting a plurality of nodes such as intersections with links, and for each link, a unique number (link ID) for identifying the link and a link indicating the length of the link Stored is link information including data on the length, x and y coordinates of the start and end of the link, the road width of the link, and the road type (indicating road information such as toll roads). As a storage medium, a CD-ROM, a DVD-ROM, or a hard disk is generally used, but other media such as a memory card may be used. Of course, for example, when a CD-ROM or the like is used, a CD player and a DVD player for reading data are also provided.

  The operation system I / F 109 is connected to an operation switch 108 for receiving various operations by the user such as selection, enlargement, reduction, cursor movement, and character input. The operation system I / F 109 is an operation system interface for the input of the operation switch 108.

  In addition, a display device 110 is connected to the display control device 111 and performs control for displaying a navigation image including a map image on the display device 110. Here, the navigation image includes not only a map screen W1 including a road map and a guidance route at the time of route guidance, but also a function menu screen such as enlargement / reduction / movement of the map, intersection information, traffic jam information, or surrounding sightseeing There is an information display / menu window screen W2 that shows information around the current position, such as location information.

  The operation switch 108 may be constituted by, for example, a touch switch integrated with the display of the display device 110, a mechanical switch attached around the display, or a remote control switch (not shown). Good.

  Next, a navigation image display process in the navigation system 1 of the first embodiment will be described with reference to the flowchart of FIG. This process is executed every predetermined time.

  In S200, which is the first step, the current position of the host vehicle is detected by the vehicle position detection device 100, and in the subsequent S210, the moving speed (vehicle speed) of the host vehicle is detected by the vehicle speed detection device 101.

  Then, it is determined whether or not the detected vehicle speed is larger than a predetermined speed for determination (determination speed) (S220). This determination is made by the CPU 102. When the vehicle speed is higher than the determination speed (S220: YES), the display image processing / synthesizing apparatus 103 performs “image processing / composition without transition” (S230), while when the vehicle speed is equal to or lower than the determination speed (S220: NO). ), The display image processing / synthesizing apparatus 103 performs “image processing / synthesizing with transition” (S240). Then, the image processed and synthesized in S230 or S240 is displayed by being output to the display device 110 using the display control device 111 (S250).

  Here, when the “image processing / combination with transition” in S240 is executed and the display image is output in S250, the following display is performed. That is, from the state where the map screen W1 is displayed as shown in FIG. 3A, the information display / menu window screen W2 is displayed from the right side of the screen as shown by the left-pointing arrow indicated by a broken line in FIG. The information display / menu window screen W2 itself may be displayed while being wiped, as indicated by a vertical arrow indicated by a broken line in the information display / menu window screen W2. Of course, a combination of these may be displayed.

  On the other hand, when the “image processing and composition without transition” in S230 is executed and the display image is output in S250, the following display is performed. That is, from the state where the map screen W1 is displayed as shown in FIG. 3C, the information display / menu window screen W2 only appears at a predetermined position as shown in FIG. 3D.

  Thus, in the navigation system 1 of the first embodiment, when the information display / menu window screen W2 is combined and displayed on the map screen W1, only when the vehicle speed is equal to or lower than the determination speed (S220: NO), The information display / menu window screen W2 to be composited is displayed while being animated (S240). If the vehicle speed exceeds the determination speed (S220: YES), the information display / menu window screen W2 is displayed as a still image. Since the display (S230) is performed, a more appropriate map display can be realized while preventing the animation from being overly distracted.

When the vehicle speed exceeds the determination speed, it is possible to cope with (relatively) simple animation display without bringing the information display / menu window screen W2 to rest. As a simple animation display in this case, for example, a display combining image size / shape change with a small number of frames is conceivable. On the other hand, when the vehicle speed is less than or equal to the determination speed, a (relatively) complicated animation is displayed. This is, for example, a display that combines movement of the image and changes in size and shape. is there.
[Second Embodiment]
Since the map display apparatus is also applied to the navigation system in the second embodiment, the schematic configuration of the navigation system 2 will be described with reference to FIG. The navigation system 2 is mounted on a vehicle as a moving body, and includes a vehicle position detection device 120, a vehicle speed detection device 121, a central processing unit (CPU) 122, a display image processing / synthesis device 123, and a guidance route display position detection device. 124, a map data storage device 126, a ROM 127 for storing various programs, a RAM 128 for storing various processing results, a guide route memory 129, an operation system I / F 131, a display control device 133, and the like via a bus line 125. Connected and configured. In addition, an operation switch 130 is connected to the operation system I / F 131, and a display device 132 is connected to the display control device 133.

  Among these components, “vehicle position detection device 120, vehicle speed detection device 121, CPU 122, display image processing / synthesis device 123, map data storage device 126, ROM 127, RAM 128, operation switch 130, operation system I / F 131, display The device 132 and the display control device 133 ”are the“ vehicle position detection device 100, vehicle speed detection device 101, CPU 102, display image processing / synthesis device 103, bus line 104, map data storage device 105, ROM 106 in the first embodiment described above. , RAM 107, operation switch 108, operation system I / F 109, display device 110, and display control device 111 ”, and detailed description thereof will be omitted.

On the other hand, the guidance route display position detection device 124 and the guidance route memory 129, which are configurations unique to the second embodiment, will be described.
In the second embodiment, the CPU 122 searches (calculates) the guidance route. Specifically, from the current position of the vehicle detected by the vehicle position detection device 120 or the departure point input by the user via the operation switch 130 to the destination input by the user via the operation switch 130. Calculate the route. As such a method for automatically setting an optimum route, a method such as the Dijkstra method is known, and the details thereof are omitted. The guidance route searched in this way is stored in the guidance route memory 129. When the route guidance is executed, for example, as shown in FIGS. 6A and 6C, a vehicle mark indicating the vehicle position and a guidance route R are displayed on a map around the vehicle position. In this case, the range of the map to be displayed is controlled so that the vehicle position is near the center of the screen and the traveling direction of the vehicle is toward the upper part of the screen. Further, the guidance route R is displayed on such a map. For example, the guidance route displays a conspicuous color along the road corresponding to the guidance route to appeal to the user's vision.

  When the guidance route R is displayed in this way, the guidance route display position detection device 124 detects at which position in the map screen the guidance route R exists. There are various possible detection methods. As an example, for example, as shown in FIG. 7A, the display range of the map screen W1 is divided into meshes, and which mesh the guiding route R passes is determined. A method to do this is conceivable. In addition, since the guidance path | route R is made to distinguish with others using a specific color, it can determine based on the color.

  For example, in FIG. 7A, the map screen W1 is divided into 5 × 5, and mesh numbers 1 to 25 are assigned in order from the upper left to the lower right. In this case, the guide route R passes through seven meshes having mesh numbers 4, 5, 8, 9, 13, 18, and 23. The rest is a mesh that does not pass through the guide route R (the hatched portion in FIG. 7 (a)), which is connected vertically and horizontally to display the center of gravity of the mesh group occupying the largest area as an information display / The display is centered on the menu window screen W2. In simple mesh joining, the joining area becomes an indeterminate polygon shape. Therefore, for example, it is conceivable to select an area occupying the largest area as a rectangle in the joining area. For example, in the case of FIG. 7A, the region on the left side of the drawing is larger than the region on the right side, but if a mesh with mesh number 3 is added, it does not become a rectangle. , 2, 6, 7, 11, 12, 16, 17, 22, 23, an area composed of 10 mesh groups is employed. The center of gravity of the mesh group area is set as the display center of the information display / menu window screen W2.

  In addition to selecting a region that occupies the largest area as a rectangle in the combined region, for example, a rectangular portion that takes into account the vertical and horizontal ratio of the information display / menu window screen W2 to be displayed may be employed.

  Moreover, although the example of Fig.7 (a) was divided | segmented into the 5 * 5 mesh for easy understanding, the magnitude | size of a mesh is arbitrary. Naturally, if the size of one mesh is reduced, the accuracy in specifying the position where the guidance route R exists is improved, but the calculation load required for specifying the position increases.

  Next, a navigation image display process in the navigation system 1 of the second embodiment will be described with reference to the flowchart of FIG. This process is executed every predetermined time.

In S300, which is the first step, the current position of the host vehicle is detected by the vehicle position detection device 120, and in subsequent S320, it is determined whether route guidance is currently being performed.
When route guidance is being performed (S320: YES), the display image processing / synthesizing device 103 performs image processing / synthesis to “a position that does not interfere with the route guidance direction” (S330), while when route guidance is not being performed (S330: YES). (S320: NO), the display image processing / synthesizing apparatus 103 performs image processing / synthesizing to “normal position” (S340). Then, the image processed and synthesized in S330 or S340 is displayed by being output to the display device 130 using the display control device 131 (S350).

  Here, whether or not the “position that does not interfere with the route guidance direction” in S330 is determined based on the guidance route position in the map screen detected by the guidance route display position detection device 124 described above. For example, as shown in FIG. 6A, when the route guidance direction along the guidance route R is directed to the right side of the screen from the position of the vehicle near the center of the screen, the information display / menu window screen W2 is displayed as shown in FIG. Is displayed on the left side of the screen as “a position that does not interfere with the route guidance direction”. For example, as shown in FIG. 6 (c), when the route guidance direction along the guidance route R is from the own vehicle position near the center of the screen toward the left side of the screen, the information display / menu window screen W2 is displayed as shown in FIG. ) As shown on the right side of the screen.

On the other hand, the “normal position” in S340 is a predetermined fixed position, for example, it can be considered as one of the positions in FIG. 6B or 6D.
Of course, the display position of the guide route R on the screen changes as the host vehicle advances. Therefore, for example, as shown in FIG. 6A, even when the information display / menu window screen W2 is displayed on the left side of the screen that does not hide the guide route R, the guide route is displayed on the left side of the screen depending on the change in the vehicle position thereafter. Since R may be displayed, the information display / menu window screen W2 is displayed on the right side of the screen in this case. Thus, the information display / menu window screen W2 is displayed at an appropriate position that does not hide the guide route R from time to time.

  In the second embodiment, the guidance route display position detecting device 124 corresponds to “display position specifying means” in claim 1, and the CPU 122 and the display control means 131 correspond to “display control means” in claim 1. .

  Thus, in the navigation system 2 of the second embodiment, the information display / menu window screen W2 can be displayed at a position where the guide route R is not hidden in the screen during route guidance. It is possible to prevent a situation where it is difficult to see the image, and display suitable for the user is realized.

  In the present embodiment, as described above, it is assumed that the map is displayed so that the vehicle position is near the center of the screen and the traveling direction of the vehicle is toward the top of the screen. As illustrated, it is considered that the guidance route R often exists only in either the left or right half of the screen. However, there are cases in which a complicated traveling direction is required, and the guidance route R is not necessarily present only on either the left or right half of the screen, but even in that case, avoid the position where the guidance route R exists. The information display / menu window screen W2 may be displayed. In this case, for example, if the information display / menu window screen W2 has the original size, a part of the guide route R may be hidden regardless of where the information is displayed. Therefore, in this case, the information display / menu window screen W2 may be displayed with a reduced size.

  However, if the image is reduced too much, the content to be transmitted to the user on the information display / menu window screen W2 may not be sufficiently transmitted. For example, this may be the case when characters or icons to be displayed are too small. In reality, the size that can be reduced is limited, so if the guide route R is hidden even if the size is reduced to the limit size, for example, the map screen W1 and the information display / It is conceivable to display the guidance route R so as to be visually recognized, for example, by performing transparent synthesis with the menu window screen W2.

  In addition, it is preferable for the user who receives the route guidance that the guide route R is not hidden, but it is also not preferable that the information display / menu window screen W2 is positioned to the limit of the guide route R, for example. That is, it is preferable for the user to recognize the name of an intersection or facility near the guidance route R in order to understand the route. Therefore, it is also preferable to consider the information display / menu window screen W2 as an area that does not display as much as possible for a predetermined range around the guidance route R. Specifically, for example, a range where the name of an intersection or a mark of a facility (such as a gas station or a convenience store) existing along the road is not hidden is conceivable.

[Another embodiment]
(1) In the first embodiment, only one determination speed is used. However, a plurality of determination speeds may be set and the display method may be changed for each determination speed. For example, as the determination speed increases, the degree of simplification of the animation is increased, and when the maximum determination speed is exceeded, a still image is displayed.

  Further, such a determination speed may be configured to be arbitrarily set by the user operating the operation switch 108. As for the contents of simple animation that does not hinder driving, there are individual differences depending on the driver's experience and qualities. Therefore, if the determination speed can be set by the driver himself, such individual differences can be dealt with.

  Further, the display speed of the information display / menu window screen W2 may be changed according to whether the determination speed is zero, that is, whether the vehicle is moving or stopped. In this case, it is possible to make a determination based on, for example, the operating state of the parking brake, without using the vehicle speed. In this way, it can be easily determined.

  (2) In the second embodiment, the display position of the guide route R is not changed, but the display position of the information display / menu window screen W2 is changed, but the information display / menu window screen W2 is reversed. The display position of the guide route R may be changed without changing the display position. For example, as shown in FIG. 7B, when the guide route R extends from the vicinity of the center of the map screen W1 to the upper left direction, the information display / menu window screen W2 displayed on the left side of the screen overlaps with a part thereof. As a result, a part of the guide route R is hidden. Therefore, by moving the guide route R to the right, the two do not overlap.

  Note that it is possible to cope by changing the display positions of both the guide route R and the information display / menu window screen W2. The size of the information display / menu window screen W2 described above may be changed only when such a change in display position cannot cope. If you reduce the size too much, the information displayed on the menu window screen W2 may be difficult to convey to the user, so the size reduction should be performed only when the display position cannot be changed. This is because it is considered preferable.

  (3) The display image processing / synthesizing devices 103 and 123 and the guidance route display position detecting device 124 in the above embodiment may be realized by hardware, or may be realized by software processing using a CPU or the like. .

  (4) In the above embodiment, the current vehicle position is specified based on data detected by the vehicle position detection devices 100 and 120 including a gyroscope and a GPS receiver. However, in order to specify the current position, such vehicle position detection devices 100 and 120 are not necessarily required. For example, an in-vehicle communication device that acquires position information from a roadside beacon or the like may be provided, and the current position may be specified based on the acquired position information. Alternatively, a mobile phone, PHS, or the like may be connected to the navigation systems 1 and 2, and the current location may be specified by a position specifying function of the mobile phone, PHS, or the like.

  (5) In the above embodiment, the example applied to the in-vehicle navigation systems 1 and 2 has been described. However, the present invention is not limited to the application, and can be applied to, for example, a terminal device carried by a person. It is. In this case, too, for example, when you are running or walking, it is difficult to see if there is a moving display, and if you are too distracted by the screen, attention to the surroundings tends to be neglected. It is a preferable measure to stop the animation display and make it a still screen.

It is a block diagram which shows the whole structure of the navigation system of 1st Example. It is a flowchart which shows the display process in the navigation system of 1st Example. It is explanatory drawing of the example of the display content by the display process in the navigation system of 1st Example. It is a block diagram which shows the whole structure of the navigation system of 2nd Example. It is a flowchart which shows the display process in the navigation system of 2nd Example. It is explanatory drawing of the example of the display content by the display process in the navigation system of 2nd Example. (A) is explanatory drawing of the determination method of the display position of the guidance route R, (b) is explanatory drawing in the case of changing and responding to the display position of the guidance route R.

Explanation of symbols

1, 2 ... Navigation systems 100, 120 ... Vehicle position detection devices 101, 121 ... Vehicle speed detection devices 102, 122 ... CPU
103, 123 ... display image processing / synthesizing device 104, 125 ... bus line 105, 126 ... map data storage device 106, 127 ... ROM
107, 128 ... RAM
108, 130 ... operation switches 109, 131 ... operation system I / F
110, 132 ... display devices 111, 133 ... display control device 124 ... guidance route display position detection device 129 ... guidance route memory

Claims (5)

A map display device mounted on a mobile body, capable of displaying a map screen so as to identify a guidance route for route guidance, and capable of combining and displaying another screen on the map screen,
Display position specifying means for specifying the display position of the guidance route in the map screen;
When the display position of the guidance route in the map screen specified by the display position specifying means and the display position of the other screen combined and displayed on the map screen overlap, the display method of the other screen or Display control means for changing and controlling at least one of the display methods of the guidance route,
The display control means includes
The change control at least one of a display position of the other of the screen of the display position or the guidance route to the induction route is hidden is not the composite display as in the map screen,
Wherein at least only either one of the control of the display position of the control or pre Ki誘 guide path of the display position of another screen if the guide route during the map screen is hidden, the other screen the composite display Control the display size of
When said Changing the display size of the other screen synthesizing displaying the guidance route is hidden, the guide route passes synthesis processing the map screen and the other screens so as to be seen by transmitted A map display device characterized by that. The map display device according to claim 1,
Wherein the display control unit, the first time when the induction route is hidden during the another screen control and still the map screen running both the control of the display position of the guidance route of the display position of the composite display A map display device that controls to change the display size of the other screen. In the map display device according to claim 1 or 2,
The display control means, when not displaying the guidance route, displays the other screen to be synthesized and displayed at a predetermined position in a predetermined size. In the map display apparatus in any one of Claims 1-3,
The map display device characterized in that the other screen to be combined and displayed includes at least one of a function menu screen for enlarging / reducing / moving a map, and a current position peripheral information screen such as intersection information.   The program for functioning a computer as the said display position specific | specification means and the said display control means in the map display apparatus as described in any one of Claims 1-4.

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