JP2004317417A - Map display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a map in such a way that a sense of relative distance from a vehicle to each point on the map may be easily grasped. <P>SOLUTION: A navigation device 100 is provided with a location detector 101 for detection the location of the vehicle; a display device 110; and a control circuit 108 for displaying a peripheral map of the vehicle on the display device 110 with a vehicle mark indicating the location of the vehicle. The range of the map displayed on the display device 110 is of a circular or fan-like shape having a circular part with the vehicle mark at an approximately center location. Therefore, since the distances between the display location of the vehicle mark and the circular part are equal, it is possible for an occupant of the vehicle to easily grasp a sense of relative distance to each point displayed on the map with reference to the circular part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a map display device that displays a map on a screen.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a map display device, for example, a navigation device mounted on a vehicle and displaying, on a display screen, a map around the vehicle along with a vehicle mark indicating the current position of the vehicle is known. In this navigation device, the vehicle mark is fixedly displayed at a predetermined position on the display screen, and when the vehicle travels, the map is scrolled by a distance corresponding to the traveling distance of the vehicle, so that the vehicle is always displayed. You can check the map of the surrounding area.
[0003]
[Problems to be solved by the invention]
Here, the display screen of the display device in the conventional navigation device has a substantially rectangular shape. Therefore, for example, when the vehicle mark is displayed at the center of the map, the display range of the map differs between the vertical direction and the horizontal direction. For this reason, despite displaying the map around the vehicle, it is difficult for the user of the navigation device to grasp the relative sense of distance from the screen display to each point around the vehicle. There was a problem.
[0004]
The present invention has been made in view of the above-described points, and provides a map display device capable of performing a map display in which a sense of relative distance to each point on a map can be easily grasped. The purpose is to:
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the map display device according to claim 1,
Display means having a display screen;
Storage means for storing map data for drawing the map on the display means;
A display control means for displaying a desired map on the display means based on the map data stored in the storage means,
At least a part of the outer edge shape of the map display range on the display screen is arc-shaped.
[0006]
As described above, when at least a part of the outer edge shape of the map display range is arc-shaped, the distance from the center position when the arc is regarded as a circle to the outer edge of the arc is equidistant. Therefore, the relative sense of distance from the center position to each point on the map can be intuitively grasped with reference to the arc-shaped outer edge of the display range.
[0007]
The map display device according to claim 2 is mounted on a vehicle,
A position detecting means for detecting a position of the vehicle,
The display control means superimposes a vehicle mark indicating the current position of the vehicle on the map at a substantially central position of the arc-shaped outer edge.
[0008]
By displaying the vehicle mark at a substantially central position of the arc-shaped outer edge in this manner, the distance from the display position of the vehicle mark to the arc-shaped outer edge is equal. Therefore, the occupant of the vehicle can easily grasp the relative sense of distance from the display position of the vehicle mark to each point displayed on the map.
[0009]
As described in claim 3, it is preferable that the arc-shaped portion in the outer edge shape of the map display range is set in the traveling direction of the vehicle. In a vehicle, when a passenger looks at a map display, he / she is more conscious of an area to be advanced than an area through which the passenger has passed. For this reason, it is desirable to perform a map display in which the relative distance to each point can be easily grasped in a range ahead of the current position of the vehicle in the traveling direction.
[0010]
In order to make a part of the outer edge shape of the display range of the map into an arc shape, as described in claim 4, the display screen of the display means is formed at least in part with an opening having an arc shape. This can be achieved by covering with a cover. However, in this case, the display range of the map on the display screen is fixed.
[0011]
On the other hand, as described in claim 5, the display control means may adjust the display range of the map on the display screen so that a part of the outer edge of the display range of the map is formed in an arc shape. In this case, the display range of the map can be changed, and the map can be displayed in a form including more useful information for the user of the map display device.
[0012]
When the display range of the map can be changed on the display screen, for example, as described in claim 6, speed detection means for detecting the running speed of the vehicle is provided, and the display control means sets the map as the running speed of the vehicle increases. It is preferable to change the display range of the map so as to reduce the arcuate portion of the outer edge of the display range. As described above, when the arc-shaped portion set in the traveling direction of the vehicle is changed according to the traveling speed of the vehicle, when the traveling speed of the vehicle is low, a map of a wider range is displayed, and when the traveling speed is increased, The display range of the map is narrowed along the traveling direction of the vehicle. As a result, when the vehicle is running at a low speed, it is possible to grasp the map over a wide range from the front of the vehicle to the left and right directions, for example, it is easy to confirm a target facility, a detour, etc. Become. On the other hand, when the vehicle is running at a high speed, it is considered that the driver's consciousness is directed to a road condition ahead of the vicinity of the vehicle. For this reason, by narrowing the display range of the map along the traveling direction of the vehicle, unnecessary information can be cut off, and a map display that is easier to see and that the relative sense of distance can be easily grasped can be performed.
[0013]
In this case, as described in claim 7, the display control means increases the map display range in front of the vehicle in the traveling direction in response to reducing the arc-shaped portion of the outer edge of the map display range. Thus, it is preferable to shift the display position of the vehicle mark on the display screen. Thus, when the speed of the vehicle increases, a map display covering a farther range in the traveling direction of the vehicle can be performed.
[0014]
On the other hand, when the vehicle is stopped, as described in claim 8, the display control means sets the outer edge shape of the display range of the map to a substantially circular shape, and places the vehicle mark at the center of the substantially circular outer edge shape. It is preferable to display. For example, when confirming the position of a desired facility, the driver of the vehicle may stop the vehicle and then scrutinize the displayed map in detail. In such a case, it is convenient for the occupant of the vehicle to be able to widely check the map around the vehicle regardless of the traveling direction of the vehicle.
[0015]
The map display device according to claim 9 is:
Display means having a display screen;
Storage means for storing map data for drawing the map on the display means;
Position detecting means for detecting the position of the vehicle;
Display control means for displaying a map around the position of the vehicle detected by the position detection means on a display means together with a vehicle mark indicating the position of the vehicle based on the map data stored in the storage means. So,
The display control means superimposes an equidistant line connecting the points at substantially equal distances from the display position of the vehicle mark on the map in order to identify points at substantially equal distances from the vehicle.
[0016]
In this manner, when an equidistant line connecting points substantially equidistant from the display position of the vehicle mark is superimposed on the map and displayed, the relative distance from the vehicle position to each point on the map is determined based on the equidistant line. The sense of distance can be easily grasped.
[0017]
The map display device according to the tenth aspect includes a speed detecting unit that detects a traveling speed of the vehicle, and the display control unit increases a display range of the map in a forward direction of the vehicle as the traveling speed of the vehicle increases. In addition, the display position of the vehicle mark on the display screen is shifted, and the equidistant line is displayed as an arc.
[0018]
In this way, by shifting the display position of the vehicle mark so that the display range of the map in front of the traveling direction of the vehicle becomes longer as the traveling speed of the vehicle becomes faster, the range to a farther distance in the traveling direction of the vehicle is increased. A cover map can be displayed. However, for example, if the display mark of the vehicle deviates from the center position of the display screen, a case may occur in which a circular equidistant line cannot be displayed over the map. To cope with such a case, the equidistant lines are displayed as arcs. In this case, the equidistant line is not displayed in the area behind the vehicle, but when the vehicle is running, the driver's consciousness is directed substantially toward the front of the vehicle. Therefore, even if the equidistant line is not displayed for the area behind the vehicle, no particular trouble occurs.
[0019]
When the vehicle is stopped, the display control means preferably displays a circular equidistant line on the map with the vehicle mark as the center. In some cases, it is necessary to widely check the road conditions around the vehicle, and in that case, the driver of the vehicle often stops the vehicle and scrutinizes the display map.
[0020]
The map display device according to claim 12,
Display means having a display screen;
Storage means for storing map data for drawing the map on the display means;
Position detecting means for detecting the position of the vehicle;
Display control means for displaying a map around the position of the vehicle detected by the position detection means on a display means together with a vehicle mark indicating the position of the vehicle based on the map data stored in the storage means. So,
The display control means is configured to make a display mode of a map belonging to a range substantially equidistant from the vehicle mark different from a display mode of a map outside the range of substantially equidistant from the vehicle mark.
[0021]
In this way, by making the display form of a map belonging to a range substantially equidistant from the vehicle mark different from the display form of a map outside the range of the substantially equidistant distance, the boundary of the different display form is set as a reference. As a result, it is possible to easily grasp the relative sense of distance from the vehicle to each point on the map.
[0022]
As described in claim 13, the display control means compares a map outside the equidistant range with a map inside the range, and adjusts any of brightness, saturation, chromaticity, and a display line to obtain a tone. It is preferable to change the display form of the map by displaying the map down. As a result, a map within the equidistant range from the vehicle is displayed in an easily viewable manner, and the boundary indicating the equidistant range is also clear. When adjusting the display line, tone down display can be performed by changing the thickness of the display line other than the color and brightness, or by displaying the display line with a dotted line.
[0023]
Further, as set forth in claim 14, a speed detecting means for detecting the running speed of the vehicle is provided, and the display control means increases the display range of the map in the forward direction of the vehicle as the running speed of the vehicle increases. As described above, it is preferable that the display position of the vehicle mark on the display screen is shifted, and the shape of the boundary defining the equidistant range is an arc shape.
[0024]
Thus, as in the case of the tenth aspect, when the running speed of the vehicle increases, a map display covering a farther range in the traveling direction of the vehicle can be displayed. Furthermore, even when the display mark of the vehicle is displaced, a map display with a different display form inside and outside the equidistant range can be performed by making the shape of the boundary defining the equidistant range into an arc shape. .
[0025]
When the vehicle is stopped, the display control means preferably sets the shape of the boundary defining the equidistant range to a circle around the vehicle mark. As a result, when the vehicle stops, a boundary appears as a reference for grasping the relative sense of distance over all directions around the vehicle.
[0026]
The map display device according to claim 16 is characterized in that the display screen of the display means is installed at a position directly facing the driver of the vehicle so as to be inclined toward the traveling direction of the vehicle. By disposing the display screen at a position facing the driver of the vehicle, the amount of movement of the line of sight when the driver checks the display map can be reduced. Furthermore, since the display screen is inclined in the rearward direction of the vehicle to provide a sense of depth in the map display, the relative sense of distance can be more easily grasped.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a map display device according to an embodiment of the present invention will be described. In the following embodiments, an example in which the map display device is applied to an in-vehicle navigation device will be described.
[0028]
(1st Embodiment)
FIG. 1 is a block diagram showing a schematic configuration of the vehicle-mounted navigation device 100 according to the first embodiment. As shown in FIG. 1, the on-vehicle navigation device 100 according to the present embodiment includes a position detector 101, a map data input device 106, an external memory 109, a display device 110, an audio output device 111, a remote control sensor 112, and connected to these. And a control circuit 108.
[0029]
The control circuit 108 is configured as a normal computer, and includes a well-known CPU, ROM, RAM, I / O, and a bus line connecting these components. A program to be executed by the control circuit 108 is written in the ROM, and the CPU and the like execute predetermined arithmetic processing according to the program. Note that this program can also be obtained from outside via the external memory 109.
[0030]
The position detector 101 includes a well-known geomagnetic sensor 102, a gyroscope 103, a vehicle speed sensor 104 for calculating a traveling distance, and a GPS (Global Positioning System) for detecting the position of the vehicle based on radio waves from satellites. GPS receiver 105 for These are configured to be used while being complemented by a plurality of sensors, since each has an error having a different property. Depending on the accuracy of each sensor, the position detector 101 may be constituted by a part of the above-described components. Further, other sensors such as a steering rotation sensor (not shown) and a vehicle speed sensor of each rolling wheel may be used. Good.
[0031]
The map data input device 106 is a device for inputting road map data for drawing a road map and map data including landmark data to the control circuit 108. As a storage medium for storing the map data, a CD-ROM or a DVD-ROM is generally used because of its data amount, but a writable storage medium such as a memory card or a hard disk may be used.
[0032]
The display device 110 is configured by, for example, a liquid crystal display. The processing of the control circuit 108 displays, for example, a vehicle mark corresponding to the current position of the vehicle input from the position detector 101 on the screen of the display device 110, and a map data input. A road map around the vehicle generated by the map data input from the device 106 can be displayed. The display device 110 will be described later in detail.
[0033]
The audio output device 111 includes a speaker, an audio amplifier, and the like. For example, when a destination is set and a guidance route to reach the destination is calculated, audio guidance related to the guidance route is provided. Perform
[0034]
Further, the in-vehicle navigation device 100 according to the present embodiment has a remote control sensor 112 that wirelessly receives an operation signal from a remote control terminal (hereinafter, referred to as a remote control) 113. By operating the remote controller 113, various operations such as setting a desired facility or point as a destination, scrolling a display map in an arbitrary direction, or changing the scale of the display map as described above can be performed. It can be carried out. When the destination is set, the control circuit 108 automatically searches for the optimal route from the current position of the vehicle (or the departure point designated by the user) to the destination, and calculates a guidance route. Then, the guidance route is displayed on the display device 110.
[0035]
Next, the display device 110, which is a feature of the present embodiment, will be described with reference to FIGS.
[0036]
First, the control circuit 108 in the present embodiment normally displays the current position of the vehicle detected by the position detector 101 and a road map around the vehicle on the display device 110. At that time, a so-called "heading-up" display is performed so that the vehicle mark indicating the current position of the vehicle is fixed at a predetermined position on the display screen and the traveling direction of the vehicle always faces upward of the display screen. In this case, when the traveling direction of the vehicle changes or the vehicle moves, the map rotates by the change in the traveling direction and the map is scrolled by the moving amount of the vehicle.
[0037]
As described above, on the premise that the vehicle mark is displayed as “heading up” at a predetermined position on the display screen, the display device 110 according to the present embodiment includes a cover 120 having an opening of a predetermined shape on the display screen. It is characterized by being attached.
[0038]
FIG. 2A is a perspective view illustrating a state before the cover 120 is mounted on the display screen, and FIG. 2B is a perspective view illustrating a state of the display screen after the cover 120 is mounted. As shown in FIGS. 2A and 2B, the cover 120 has an opening having an arc-shaped portion 120a where the vehicle mark is located substantially at the center, and the entire opening has a fan shape. ing. This is because the vehicle mark is displayed at a position shifted downward from the center position of the display screen. Then, the cover 120 is mounted on the display screen such that the arc-shaped portion 120a of the opening of the cover 120 is set in the traveling direction of the vehicle and is symmetrical with respect to the traveling direction.
[0039]
In this way, by displaying the vehicle mark substantially at the center of the arc-shaped portion 120a of the fan-shaped opening as a whole, the distance from the display position of the vehicle mark to each portion of the arc-shaped portion becomes substantially equal. Therefore, by using the arc portion as a reference, the occupant of the vehicle can easily grasp the relative sense of distance from the display position of the vehicle mark to each point displayed on the map. become.
[0040]
Further, as described above, the arc-shaped portion 120a in the opening of the cover 120 is set in the traveling direction of the vehicle, so that a map display more useful for the occupant of the vehicle can be performed. That is, when the passenger looks at the map display in the vehicle, the driver is more conscious of the area to be advanced than the area where the vehicle has passed, and if a relative sense of distance to each point in the area to be advanced can be obtained, the route is selected. And confirmation can be performed appropriately.
[0041]
In the present embodiment, as described above, it is possible to easily grasp the relative distance to each point on the map simply by attaching the cover 120 having the fan-shaped opening to the display device 110. It is possible to perform a simple map display. In this case, as the display device 110, there is an advantage that a display device having a square display screen as in the related art can be used as it is. Further, by disposing the operation switches and the like on the cover 120, there is also an advantage that the installation area of the operation switches can be expanded.
[0042]
FIG. 3 shows an example in which the display device 110 with the cover 120 according to the present embodiment is installed in a vehicle interior. In the example illustrated in FIG. 3, the display device 110 is installed at a position facing the driver of the vehicle such that the upper portion of the display device 110 is inclined toward the traveling direction of the vehicle. In this manner, by disposing the display device 110 at a position directly facing the driver of the vehicle, the amount of movement of the line of sight when the driver checks the display map or the like can be reduced. Further, since the upper portion of the display device 110 is inclined and installed behind the vehicle, a sense of depth is generated in the map display, and the sense of relative distance is further grasped in combination with the display range of the fan-shaped map. Can be made easier.
[0043]
In the above-described embodiment, a part of the outer edge shape of the map display range on the display screen of the display device 120 is formed in an arc shape by using the cover 120, but the outer edge of the display range is used as the display device 120. A shape having an arcuate portion in at least a part of the shape may be employed.
[0044]
(2nd Embodiment)
Next, a navigation device according to a third embodiment of the present invention will be described. In the above-described first embodiment, the shape of the display range on the display device 110 is set by the cover 120. However, in the navigation device of the present embodiment, the control circuit 108 controls the display range by software. As described above, by changing the display range of the map by the control circuit 108, it is possible to display the map in a form including more useful information for the user.
[0045]
In the navigation device according to the present embodiment, the cover 120 is not attached to the display device 110 because the control circuit 108 controls the display area of the map. The other configuration is the same as the configuration of the navigation device 100 described above, and the description thereof is omitted.
[0046]
FIG. 4 is a flowchart showing processing for controlling the display range of the map, which is executed by the control circuit 108. Hereinafter, control of the display range will be described based on this flowchart. First, in step S10, the current position of the vehicle is acquired based on a detection signal from the position detector 101. Then, in step S20, the map data of the surrounding map including the current position of the vehicle is read from the map data input device 106. Next, in step S30, the running speed of the vehicle is calculated based on the sensor signal of the vehicle speed sensor 104. In step S40, the calculated traveling speed is compared with a reference speed for dividing the traveling state of the vehicle into a "stopped state", a "low-medium-speed state", and a "medium-high-speed state".
[0047]
As a result of the comparison in step S40, when it is determined that the vehicle is in the "stop state", the process proceeds to step S50, and the display range of the map is set to the first display range (display range {circle around (1)}). As shown in FIG. 5A, the first display range has a substantially circular shape so that a sense of distance in all directions from the current position of the vehicle can be grasped. In step S60, the display position of the vehicle mark is set substantially at the center of the display screen so as to correspond to the circular map display range. Thus, the distances from the vehicle mark to the outer edge of the map display range can all be equalized. As described above, when the vehicle is in the "stop state", the outer edge shape of the display range of the map is substantially circular, and the vehicle mark is displayed at the center of the substantially circular outer edge shape. As a result, for example, when the driver of the vehicle stops the vehicle and scrutinizes the display map in detail to confirm the position of a desired facility around the vehicle, the sense of distance in all directions of the vehicle can be grasped. Therefore, a map display useful for the user can be performed.
[0048]
If it is determined in step S40 that the traveling speed of the vehicle is in the "low to medium speed state", the process proceeds to step S70, and the map display range is set to the second display range (display range {circle around (2)}). As shown in FIG. 5B, the second display range has a substantially sector shape having an arc-shaped portion of a semicircle or more. Then, in step S80, the display position of the vehicle mark is set in the middle between the center and the lower part of the display screen so that the vehicle mark is displayed substantially at the center of the arc-shaped portion. As described above, when the traveling speed of the vehicle is in the “low to medium speed state”, the display range of the map is substantially fan-shaped having an arc-shaped portion of a semicircle or more, and the display position of the vehicle mark is the arc-shaped portion. Is shifted downward from the center of the display screen by a predetermined distance so as to be displayed at substantially the center of the display screen.
[0049]
When the vehicle is traveling at low to medium speeds, the map display of the area that has already passed is of little value to the driver of the vehicle, and it is useful to display the area in the traveling direction of the vehicle as wide as possible. There are many. For example, when searching for a target facility or checking a detour, if a map of a large area in the direction of travel of the vehicle can be checked, such a facility or detour should be easily found. Can be. Therefore, in the "low-medium speed state", it is more effective to make the display area of the map substantially fan-shaped in consideration of the area in the traveling direction of the vehicle than in the "stop state". By making the arc-shaped portion large, the map can be easily checked over a wide range from the front of the vehicle to the left and right directions.
[0050]
If it is determined in step S40 that the traveling speed of the vehicle is "medium to high speed", the process proceeds to step S90, and the display range of the map is set to the third display range (display range {circle around (3)}). . As shown in FIG. 5C, the third display range has a smaller arc-shaped portion than the second display range. As a result, the display range of the map changes along the traveling direction of the vehicle. It has a narrowed substantially fan shape. Then, in step S100, the display position of the vehicle mark is set at the lower part of the display screen in order to lengthen the range of the map displayed in the forward direction of the vehicle. Note that the display position of the vehicle mark is set at the lower part of the display screen, so that the display position of the vehicle mark is set in advance so that the radius of the arc-shaped portion matches the substantially center position of the reduced arc-shaped portion. Has been determined.
[0051]
As described above, in the present embodiment, when the traveling speed of the vehicle becomes “medium to high speed state”, the display range of the map is changed so as to reduce the arc-shaped portion in the display range of the substantially fan-shaped map. . When the vehicle is running at medium to high speeds, the driver's consciousness is likely to be directed to road conditions ahead of the vicinity of the vehicle. For this reason, by reducing the arc-shaped portion, the display range of the map is narrowed along the traveling direction of the vehicle, so that unnecessary information can be cut off, and it is easier to see, and it is easier to grasp the relative sense of distance. A map can be displayed.
[0052]
When the display range of the map and the display position of the vehicle mark according to the running state of the vehicle are set in this way, the display process is executed in step S110. In this display processing, a map image including a vehicle mark is generated by the control circuit 108 and displayed on the display device 110 according to the set display range of the map and the display position of the vehicle mark.
[0053]
(Modification)
As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above embodiments, and can be variously modified and implemented without departing from the gist of the present invention.
[0054]
For example, in the second embodiment, the travel speed range of the vehicle is divided into "stop", "low to medium speed", and "medium to high speed", and the display range of the map is set to 3 depending on which speed range it belongs to. The example of switching to the stages has been described. However, the switching of the map display range is not limited to three steps, but may be two steps or four or more steps. Furthermore, control may be performed so that the display range of the map changes linearly according to the traveling speed.
[0055]
Further, in the second embodiment, an example has been described in which the display range of the map is from a circle to a substantially sector shape. The shape is not limited to a circular shape or a substantially fan shape as long as it has. Furthermore, the user may be allowed to freely set the size of the display range and the shape excluding the arc-shaped portion.
[0056]
In the first and second embodiments described above, an arc-shaped portion is provided on at least a part of the outer edge shape of the display range of the map. Was easier to grasp. However, other techniques may be used to provide the user with a criterion for obtaining such a sense of relative distance. For example, as shown in FIG. 6, an arc-shaped portion having a display mark of the vehicle at a substantially central position may be displayed on the map as an equidistant line. By displaying the equidistant lines superimposed on the map in this manner, the user can easily grasp the relative sense of distance in various places based on the equidistant lines.
[0057]
Further, as described in the second embodiment, when the vehicle starts running from a stopped state, the equidistant line changes its shape from a circle to a fan shape, and further, as the speed increases, the The shape may be changed so that the fan-shaped arc-shaped portion becomes smaller. In accordance with such a change in the shape of the equidistant line, the display position of the vehicle mark is preferably displayed so as to be shifted from the center of the display screen toward the lower part.
[0058]
Further, as another example of providing a user with a reference for obtaining a sense of relative distance, as shown in FIG. 7, a display form of a map belonging to a range that is substantially equidistant from a vehicle mark, a display form of the map, and the like. The display form of the map outside the range of the distance may be different. In this way, by making the display form of a map belonging to a range substantially equidistant from the vehicle mark different from the display form of a map outside the range of the substantially equidistant distance, the boundary of the different display form is set as a reference. As a result, it is possible to easily grasp the relative sense of distance from the vehicle to each point on the map.
[0059]
Specific examples of the case where the display forms are different include, for example, changing the brightness, saturation, and chromaticity of display lines for displaying backgrounds, roads, and the like of a map inside and outside the equidistant range, and changing the form of the display lines (thickness). Or using a solid line and a dashed line). In particular, the map display within the equidistant range is made clearer than the map display outside the equidistant range, in other words, the map outside the equidistant range is displayed with a lower tone than the map inside the equidistant range. It is preferable to set the display element described above. As a result, a map within the equidistant range from the vehicle is displayed in an easily viewable manner, and the boundary indicating the equidistant range is also clear.
[0060]
Further, when changing the display form of the map inside and outside the equidistant range of the vehicle mark, as described in the second embodiment, when the vehicle starts running from a stopped state, the shape of the equidistant range is changed. The shape may change from a circle to a fan shape, and further, as the speed increases, the arc-shaped portion of the fan shape may become smaller. In accordance with the change in the shape of the equidistant range, the display position of the vehicle mark is preferably displayed so as to be shifted from the center of the display screen toward the lower part.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of an in-vehicle navigation device according to a first embodiment of the present invention.
FIGS. 2A and 2B are perspective views showing a state in which a cover is attached to a display device according to the first embodiment.
FIG. 3 is an explanatory diagram showing an example of installation of a display device in a vehicle cabin according to the first embodiment.
FIG. 4 is a flowchart illustrating a map display range control process according to a second embodiment.
FIG. 5A is an explanatory diagram showing a display range of a map when the vehicle is stopped, and FIG. 5B is a diagram showing a display range of the map when the traveling speed of the vehicle is low to medium speed. FIG. 7C is an explanatory diagram showing a display range of a map when the traveling speed of the vehicle is in a middle to high speed state.
FIG. 6 is an explanatory diagram showing a display example in which an equidistant line based on a vehicle mark is displayed on a map according to a modified example.
FIG. 7 is an explanatory diagram showing a display example in a case where a display form of a map is changed inside and outside an equidistant range from a vehicle mark according to another modification.
[Explanation of symbols]
100 ... car navigation system
101 ... Position detector
106: Map data input device
108 ... Control circuit
110 ... Display device
120 ... Cover

Claims (16)

Display means having a display screen;
Storage means for storing map data for drawing a map on the display means;
A display control unit for displaying a desired map on the display unit based on the map data stored in the storage unit,
A map display device, wherein at least a part of an outer edge shape of a map display range on the display screen has an arc shape. The map display device is mounted on a vehicle, and includes a position detection unit that detects a position of the vehicle,
2. The map display device according to claim 1, wherein the display control unit displays a vehicle mark indicating a current position of the vehicle on the map at a substantially central position of the arc-shaped outer edge shape. 3. . The map display device according to claim 2, wherein the arc-shaped portion in the outer edge shape of the map display range is set in the traveling direction of the vehicle. The display screen of the display means is covered with a cover having at least a portion having an opening having an arc shape, so that a part of the outer edge shape of the display range of the map is formed in an arc shape. The map display device according to any one of claims 1 to 3. The said display control means adjusts the display range of the map on the said display screen, and makes a part of outer edge shape of the display range of the said map arc shape, The Claim 2 or Claim 3 characterized by the above-mentioned. Map display device. Providing speed detection means for detecting the traveling speed of the vehicle,
6. The map according to claim 5, wherein the display control means changes the display range of the map so that the higher the traveling speed of the vehicle, the smaller the arc-shaped portion of the outer edge of the display range of the map. Display device. The display control means may control the vehicle mark on the display screen so that the display range of the map in the forward direction of the vehicle becomes longer in response to reducing the arc-shaped portion of the outer edge of the display range of the map. 7. The map display device according to claim 6, wherein the display position of the map is shifted. 7. The display control device according to claim 6, wherein when the vehicle is stopped, the outer edge of the display range of the map is substantially circular, and the vehicle mark is displayed at the center of the substantially circular outer edge. Or the map display device according to claim 7. Display means having a display screen;
Storage means for storing map data for drawing a map on the display means;
A display unit that displays a map around the position of the vehicle detected by the position detection unit based on map data stored in the storage unit and a vehicle mark indicating the position of the vehicle based on map data stored in the storage unit; And a display control means for displaying on a map display device,
The map display device, wherein the display control means displays an equidistant line connecting points substantially equidistant from a display position of the vehicle mark on the map. Providing speed detection means for detecting the traveling speed of the vehicle,
The display control means shifts the display position of the vehicle mark on the display screen so that the display range of the map in the forward direction of the vehicle increases as the traveling speed of the vehicle increases, and the equidistant line is defined as an arc. The map display device according to claim 9, wherein the map is displayed. 11. The map display device according to claim 10, wherein when the vehicle is stopped, the display control means displays a circular equidistant line superimposed on the map with a vehicle mark as a center. Display means having a display screen;
Storage means for storing map data for drawing a map on the display means;
A display unit that displays a map around the position of the vehicle detected by the position detection unit based on map data stored in the storage unit and a vehicle mark indicating the position of the vehicle based on map data stored in the storage unit; And a display control means for displaying on a map display device,
The map display device, wherein the display control means makes a display mode of a map belonging to a range substantially equidistant from the vehicle mark different from a display mode of a map outside the range of substantially equidistant from the vehicle mark. The display control means compares the map outside the equidistant range with the map within the range, and adjusts any one of brightness, saturation, chromaticity, and a display line to perform tone-down display. The map display device according to claim 12. Providing speed detection means for detecting the traveling speed of the vehicle,
The display control means shifts the display position of the vehicle mark on the display screen and defines a boundary for defining an equidistant range so that the higher the traveling speed of the vehicle, the longer the display range of the map in the forward direction of the vehicle. 14. The map display device according to claim 12, wherein the shape of the map is an arc. 15. The map display device according to claim 14, wherein when the vehicle is stopped, the display control unit makes a shape of a boundary defining the equidistant range circular around a vehicle mark. The map display according to any one of claims 2 to 15, wherein the display screen of the display means is installed at a position facing the driver of the vehicle so as to be inclined in the traveling direction of the vehicle. apparatus.

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