JP2005201883A - Navigation device and map indication method of the navigation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device and a map indication method of the navigation device which can grasp easily a geometry or the like of an ongoing road direction and the geometry or the like of the road of a crossing. <P>SOLUTION: The navigation device comprises a function which retrieves a course to a destination and guides a retrieved course; a position detection means which detects one's own vehicle position and outputs the own vehicle position detection signal as a result of the detection; a map data memory means to memorize the map data; a display device to display a map, etc.; and a display controlling means which reads the map data from the map data memory means based on the own vehicle position detection signal, and displays on a display device only the periphery of roads where one's own vehicle travels by a radial three dimensional display. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a navigation device having a function of searching for a route to a destination or displaying a map around a vehicle position, and more particularly to a method for displaying a map displayed on a display.

  The navigation device detects the current position of the vehicle, reads map data around the vehicle position from the map database, draws the map on the display, and displays the vehicle mark on the map. When the current position changes due to the movement of the vehicle, the map scrolls and the vehicle mark moves accordingly.

  There are two types of map display methods on the display: a two-dimensional display of roads and buildings, and a three-dimensional display of roads and buildings from the driver's line of sight to increase reality. However, in a crowded area where buildings such as urban areas are prone to appear, it may be difficult to see the road because the amount of information is too large to express them faithfully. In the case of 3D display, it may be hidden behind the building.

  In order to solve such problems, Patent Document 1 displays a map that is easier to understand than displaying only appropriate information according to the viewpoint when displaying the scenery viewed from the driver in three dimensions. Is what you do.

JP 2003-157000 A

  However, the map display in the conventional navigation device has the following problems. When displaying a three-dimensional map from the viewpoint of the driver as shown in Patent Document 1, it is difficult to see the direction of travel unless the road direction is straight, or the distance from the vehicle position to the target intersection There is a problem that the feeling is difficult to understand. Furthermore, when making a left or right turn at the target intersection, the road is hidden behind the building, and as a result, it is easy to recognize the shape of the road and the direction of travel within or after passing the intersection. There is a problem that it cannot be done.

Therefore, the present invention solves the above-described problems of the prior art, can recognize the shape and direction of the road that is traveling, and the surrounding environment, and can easily grasp the shape and the traveling direction of the road at the intersection. It is an object of the present invention to provide a navigation device that can be used and a map display method in the device.
It is another object of the present invention to provide a navigation device that can recognize at a glance which building a landmark or building name indicates, and a map display method in the device.

  A navigation device according to the present invention has a function of searching for a route to a destination, guiding the searched route, further detecting a vehicle position and outputting a vehicle position detection signal as a detection result. Detection means, map data storage means for storing map data, a display for displaying a map, etc., map data is read from the map data storage means based on the vehicle position detection signal, and only the vicinity of the road on which the vehicle travels is emitted. Display control means for displaying on a display by three-dimensional display.

  Preferably, the navigation device further includes a determination unit that determines that the host vehicle enters the intersection, and when the determination unit determines that the host vehicle enters the intersection, the display control unit displays the intersection in a three-dimensional display. Is displayed.

  Furthermore, in the map display method on the display in the navigation device of the present invention, when the map around the vehicle position is displayed on the display, only the vicinity of the road on which the vehicle is traveling is displayed by radiating three-dimensional display. Is displayed in a plan view or a bird's-eye view.

  The three-dimensional display according to the present invention is a display when a position at a predetermined height from a certain point is set as a viewpoint, and the line of sight is changed from the viewpoint to the right front, left front, right rear, and left rear and viewed downward. Defined. If it demonstrates using FIG. 1, the height from a certain point O shall be the position of H, and the right front (area | region 1), the left front (area | region 2), and the left back from there on the basis of the perpendicular V which passes through this point O This is a display when looking down at the viewing direction of angles θ1, θ2, θ3, and θ4 in (region 3) and right rear (region 4), respectively. Preferably, by making the angles of θ1, θ2, θ3, and θ4 equal to each other, a radial three-dimensional display with the point O as the center can be obtained. However, these angles are not necessarily equal. FIG. 2A is a two-dimensional display (plan view) when viewed from directly above the center O1 of the intersection 200, and this can be expressed by a three-dimensional display as shown in FIG. 2B. It becomes a landscape. That is, a road without a height is represented in a plane, but buildings A, B, C, and D having a certain height are represented so as to be inclined radially from the center O1. Note that the present applicant discloses details of the three-dimensional radiation display in Japanese Patent Application No. 2002-328149 filed on November 12, 2002.

  According to the present invention, it is possible to easily recognize the surrounding situation including the road shape and the traveling direction of the road by displaying only the vicinity of the road on which the host vehicle is traveling in a three-dimensional display. In addition, when the vehicle approaches the intersection, the intersection is displayed in a radial three-dimensional display so that the road shape within the intersection can be recognized without being blocked by the building, and from the vehicle position to the intersection. Can easily grasp the sense of distance.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 3 is a block diagram showing the configuration of the navigation apparatus according to the embodiment of the present invention. The GPS receiver 10 receives radio waves from an artificial satellite (GPS satellite) and measures the current position and current direction of the vehicle. The self-contained navigation sensor 11 includes a vehicle speed sensor that detects a moving distance of the vehicle and an angle that detects a rotation angle of the vehicle. The position detection signals of the GPS receiver 10 and the autonomous navigation sensor 11 are supplied to the control unit 80, and the control unit 80 calculates the current position and direction of the vehicle based on these position detection signals.

  The VICS / FM multiple receiver 12 sequentially receives the current road traffic information outside the vehicle via the antenna 13. The operation panel 20, the voice input unit 21, and the remote control operation unit 22 constitute an input of the navigation device 1. The operation panel 20 includes, for example, a plurality of operation keys 52 provided at the lower part of the display 51, a touch panel of the display, and the like, and the voice input unit 21 inputs voice from a microphone (not shown). The remote control operation unit 22 includes a plurality of input keys, and the operation of the input keys by the user is transmitted to the input interface 23 through radio. The input interface 23 transmits input information from these users to the control unit 80.

  The storage device 30 is preferably composed of a hard disk drive (HDD), and stores map data, address, data such as telephones and facilities, and programs for executing various navigation functions.

  The map data includes drawing data and road data for drawing facilities and buildings. The drawing data includes a position, a planar shape, a height, a polygon / line type, color information, and the like that can display buildings, roads, signals, etc. in an urban area equivalent to an actual landscape. The road data includes link information and node information connected to the link. The link information includes information such as a road width, a distance, and a road type including the link position information. The node information includes the position of the intersection. , Type, intersection lane information, and the like.

  The data communication control unit 31 transmits and receives data wirelessly. The data communication control unit 31 may include a communication device that transmits and receives data in the navigation device, or may externally attach a mobile phone or an electronic device having a communication function to the navigation device. .

  The audio output unit 40 includes a speaker 41, and outputs sound from the speaker 41 under the control of the control unit 80. For example, as information for reaching the destination, a voice prompting attention in the course direction is output before the intersection.

  The display control unit 50 is connected to the display 51 and, under the control of the control unit 80, displays a map on the display 51 based on the map data read from the storage device 30 or the data memory 70, or displays a map of the vehicle on the map. A vehicle mark indicating the current position, a route to the destination, an intersection guidance display, a facility landmark, and the like are combined and displayed. Further, in the present embodiment, the display control unit 50 performs image processing on the read map data, and generates a radiation three-dimensional image. The display control unit 50 preferably includes a VRAM such as a FIFO, stores data related to maps, roads, and guidance displays read from the storage device 30 and the data memory 70 in the VRAM, and stores the map data read from the VRAM. Combine various data.

  The program memory 60 stores various programs executed in the navigation device, and these programs are executed by the control unit 80. The program memory 60 is configured by using, for example, a rewritable RAM, and the program stored in the storage device 30 may be read out, or a ROM in which a program is stored in advance may be used. The program includes, for example, a program 61 for searching for a route to a destination, a program 62 for performing various settings and changes such as a map displayed on the display 51, and a three-dimensional radiation for displaying a map by three-dimensional radiation display. It has a display program 63 and the like.

  The data memory 70 stores processing results of various calculations processed by the control unit 80, map data 71 read from the storage device 30, and the like. Furthermore, when a route to the destination is searched, the data memory 70 stores the searched guidance route data 72 and the traveling locus data 73 indicating the locus of the route on which the vehicle has actually traveled. Further, a radiation three-dimensional image 74 subjected to image processing for radiation three-dimensional display is stored. The data memory 70 can be a DRAM, SRAM, flash memory or the like, and the contents of the data memory 70 may be transferred to the storage device 30. Further, the external memory 76 that can be attached to the navigation device 1 may be used in combination with the data memory 70.

  Next, the operation of the three-dimensional radiation display in the navigation device according to the present embodiment is shown in the flowchart of FIG. In this example, a map display when a route to the destination is set will be described as a preferred mode.

  The control unit 80 detects the vehicle position based on the position detection signal from the GPS receiver 10 and / or the autonomous navigation sensor 11 (step S101). When the setting from the user to the destination is input, the control unit 80 searches for the optimum route from the current position to the destination (step S102), and stores the searched route data in the data memory 72 (step S103). ).

  As the host vehicle travels, the control unit 80 reads map data around the host vehicle position from the storage device 30 based on the position detection signal (step S104). At this time, the control unit 80 causes the display control unit 50 to generate a three-dimensional image of a predetermined map display area according to the three-dimensional display program 63. That is, the display control unit 50 performs image processing on the map data so that a certain range of the road on which the vehicle travels is displayed in a three-dimensional display and the other is displayed two-dimensionally in the read map data ( Step S105). For example, as shown in FIG. 1, the image processing is based on the height H from the viewpoint of the vehicle position as a viewpoint, and from the traveling direction S to the right front, left front, left rear, and right rear, respectively. A three-dimensional radiation image is generated when looking down in the viewing direction of angles θ1, θ2, θ3, and θ4. In this case, the angles θ1, θ2, θ3, and θ4 may be equal.

  The display control unit 50 displays only the periphery of the road on which the vehicle travels on the display 51 based on the radiation three-dimensional image in a radiation three-dimensional display, and displays the rest in a plan view. Furthermore, on the map, a guide route display and a mark indicating the vehicle position are drawn in an overlapping manner. Then, when the vehicle position changes, the map screen scrolls, and at the same time, the radiation three-dimensional display around the vehicle position moves.

  FIG. 5 is a display example of a map on the display 51. A host vehicle position mark M is displayed on the guide route Y, and a certain rectangular area 100 from the host vehicle position M is represented by a three-dimensional radiation display. The road 102 is planar, but the buildings E on both sides of the road 102 are displayed radially or open around the vehicle position. The area other than the area 100 is represented by a two-dimensional plan view viewed from above. By such a map display, a three-dimensional landscape of a road and a building centering on the vehicle position can be visually recognized more realistically. The range 100 to be displayed in the radiation three-dimensional display can be, for example, a size proportional to the vertical and horizontal sizes of the display 51, for example, a range of 1/3 in the vertical and horizontal directions as the radiation three-dimensional display. The setting may be changed according to the scale of the map. Further, the range 100 may be freely changed by the user.

  Next, the control unit 80 determines whether or not the own vehicle enters the intersection based on the route data (step S107). For example, when the host vehicle reaches a certain distance before the intersection (for example, 200 meters before) by monitoring the position detection signal, the control unit 80 determines that the host vehicle enters the intersection.

  When it is determined that the vehicle enters the intersection, the control unit 80 sends a command to the display control unit 50 to generate a three-dimensional radiation image of the intersection. As a result, the display control unit 50 performs image processing on the map data around the intersection read from the storage device 30 to generate a radiation three-dimensional image (step S108), and stores this in the data memory 70. Then, as shown in FIG. 6, a three-dimensional radiation display is performed for a certain range 110 of the intersection in front of the vehicle position (step S109). In addition, guidance Y for the guidance route in the intersection is displayed. Thereby, in addition to the route from the vehicle position to the intersection, the shape of the building F and road in the intersection and the route after passing the intersection can be recognized at a glance.

  When the distance from the vehicle position to the intersection reaches a certain value (for example, 50 meters before) (step S110), the display of the radiation three-dimensional image of the intersection is enlarged (step S111). The enlarged view preferably enlarges the magnification of the intersection area 110 displayed in FIG. Thereby, even if the display is switched, the user can easily recognize the map without feeling uncomfortable. FIG. 7 is a display example when the intersection is enlarged. Preferably, the target T serving as a guide when making a right or left turn at the intersection is identified and displayed (in the figure, the target T is hatched). As the target T, a building or other facility located at the corner of the intersection can be used, and the target T is color-coded, the contrast of the target T is increased, or a building other than the target is whitened. You may make it make the target T stand out by blurring.

  The enlarged display is performed until the own vehicle passes the intersection (step S112). After passing through the intersection, as shown in FIG. 5 again, the area 100 around the road centered on the vehicle position is displayed in a three-dimensional display. The radiation three-dimensional display is performed until the destination is thus reached (step S113).

  According to this embodiment, only a limited area centered on the vehicle position is displayed on the display 51 in a three-dimensional display, and only the information necessary for the user is presented in detail in an easy-to-understand manner. Can grasp at a glance the road shape and building conditions around the location of the vehicle. In addition, under certain conditions, the 3D radiation display around the intersection is displayed, making it easier to see the distance from the vehicle position to the intersection and the status of buildings and facilities near the intersection. In addition, the guidance route is not hidden by the building, so that not only the route to the intersection but also the route after passing the intersection can be more easily understood.

  In the above embodiment, the three-dimensional display is performed when guiding the guidance route. However, the present invention is not limited to this, and when the guidance route is not being guided, the periphery of the vehicle is centered on the three-dimensional display. It is also possible to do. Also in this case, when an intersection exists in the direction in which the host vehicle travels, three-dimensional radiation display may be performed around the intersection.

  Further, whether to perform the three-dimensional display of radiation may be selected according to a user instruction. For example, if it is desired to stop the three-dimensional radiation display during guidance route guidance, the normal map display may be performed according to the input from the user, and vice versa. You may make it perform radiation | emission three-dimensional display according to the input from a user.

  Further, in the above embodiment, when the intersection is enlarged and displayed (FIG. 7), only the peripheral area 110 of the intersection in FIG. 5 is enlarged, but this area 110 is expanded and its enlarged map is displayed. It may be.

  Furthermore, when performing the enlarged display of the intersection, the display 51 may be divided into two screens, the current map display may be performed on one side, and the enlarged display of the intersection may be performed on the other side. Further, a region other than the region where the radiation is three-dimensionally displayed is not limited to a plan view, and may be a bird's eye view.

  Next, a second embodiment of the present invention will be described. The second embodiment details a method for displaying landmarks on a three-dimensionally displayed building. In general, when a map is displayed on a wide scale, the appearance of a building is not displayed on the map, but a landmark for identifying the position and type of the building is displayed. When the map magnification increases, for example, when a map is displayed on an urban scale, landmarks are combined and displayed together with the two-dimensional or three-dimensional appearance of the building.

  To display a building such as a building in two dimensions or three dimensions, drawing data stored in the storage device 30 is used. The drawing data includes, in addition to building position data, plane data and height data indicating a household diagram. For example, as shown in FIG. 8, when the building 150 is displayed three-dimensionally, a plane is drawn using the plane data (X, Y direction) 152 of the household diagram, and further using the height data (Z direction) 154. Is lifted vertically to represent a three-dimensional building 150. In the case of two-dimensional display, only the plane data 152 may be used. When the building 150 is displayed in a three-dimensional display, the building 150 is displayed in an inclined manner by converting the height data into the direction of emission.

  Here, when a landmark is synthesized on a two-dimensionally displayed building, as shown in FIG. 9A, the landmark LM is positioned so as to coincide with the center coordinates of the plane data 152 of the household diagram. ing. On the other hand, when the building 150 is displayed in a three-dimensional display, if the position of the landmark LM matches the center coordinate of the surface data 152, the landmark LM is displayed at the bottom of the building, and the landmark LM is displayed. It becomes difficult to understand which building you are pointing to. For this reason, in this embodiment, as shown in FIG. 9B, the landmark LM is displayed on the top of the building.

  In order to display the landmark LM on the top of the building, the building height data 154 is used as shown in FIG. That is, the landmark LM may be offset in the Z direction from the center coordinates of the surface data 152 by the height data. In the case of three-dimensional radiation display, the horizontal distance is further corrected according to the radiation angle θ so that the landmark LM is positioned at the center of the top of the building.

  In addition to the landmark, for example, the name of the building may be displayed based on the height data 154. For example, as shown in FIG. 11A, the building name 160 (ABC building) may be displayed at the center of the top of the building 150 displayed in a three-dimensional manner. Alternatively, as shown in FIG. 11B, the building name 160 may be displayed at the same height as the top of the building.

  Moreover, you may make it display on the top part of a building similarly about the attachment position about a building besides a building name. For example, the supplementary indication displays the tenant name of each floor of the building, facility guidance, and the like. On the other hand, in the case of a name indicating the basement of the building, it is not subject to position correction. This is because displaying the underground display on the top of the building is misleading and inappropriate.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

  The navigation device according to the present invention can be used in a navigation device for a mobile object, a navigation system, or an electronic device including these functions. In addition, an electronic device including a navigation function that can be mounted on a mobile body, a multimedia-compatible electronic device having an audio function, a TV broadcast receiving function, etc. in addition to the navigation function, or a plurality of electronic devices having such a function It can also be used by configured electronic systems.

It is a figure explaining radiation | emission three-dimensional display. It is a figure which shows the comparative example of 2D display and radiation | emission 3D display. It is a block diagram which shows the structure of the navigation apparatus which concerns on the Example of this invention. It is a flowchart explaining the operation | movement of radiation | emission three-dimensional display in the navigation apparatus which concerns on a present Example. It is a figure which shows the example which displayed the periphery of the own vehicle position in a present Example by radiation | emission three-dimensional display. It is a figure which shows the example which displayed the periphery of the intersection in a present Example by radiation | emission three-dimensional display. It is the figure which expanded the intersection periphery of FIG. It is a figure explaining the drawing data of a building. It is a figure which shows the example of a display of a landmark. It is a figure explaining the position correction of a landmark. It is a figure explaining position correction, such as a building name.

Explanation of symbols

1: navigation device, 10: GPS receiver, 11: autonomous navigation sensor,
12: VICS receiver, 20: operation panel, 21: voice input unit,
22: remote control, 23: input IF, 30: storage unit, 40: audio output unit,
41: speaker, 50: display control unit, 51: display,
60: Program memory, 70: Data memory, 80: Control unit,
100: Area around own vehicle position, 110: Area around intersection 200: Intersection

Claims (15)

A navigation device having a function of searching for a route to a destination and guiding the searched route,
Position detection means for detecting the vehicle position and outputting a vehicle position detection signal as a detection result;
Map data storage means for storing map data and the like;
A display for displaying a map and the like;
A navigation apparatus comprising: display control means for reading out map data from the map data storage means based on the own vehicle position detection signal, and displaying only the periphery of the road on which the own vehicle is traveling on a display using a three-dimensional radiation display. The navigation device according to claim 1, wherein the display control means displays only the vicinity of the vehicle position in a three-dimensional radiation display and displays the other in a two-dimensional display. The navigation device according to claim 1, wherein the display control means displays only the vicinity of the own vehicle position in a three-dimensional radiation display and displays the others in a bird's eye view display. The navigation device further includes a determination unit that determines whether the host vehicle enters the intersection. When the determination unit determines that the host vehicle enters the intersection, the display control unit displays the intersection in a three-dimensional display. The navigation device according to any one of claims 1 to 3. The navigation apparatus according to claim 4, wherein the display control means enlarges the magnification of the three-dimensional display of the intersection when the own vehicle reaches a certain distance before the intersection. The navigation device according to any one of claims 1 to 5, wherein the display control means gives an identification display to the target for route guidance at the intersection displayed in a three-dimensional manner. The display control means corrects the display position of the landmark based on the height data of the building stored in the map data storage means when displaying the landmark on the three-dimensionally displayed building. 6. The navigation device according to any one of 6. The display control means corrects the display position of the building name based on the height data of the building stored in the map data storage means when the building name is displayed on the three-dimensionally displayed building. 6. The navigation device according to any one of 6. The navigation device according to claim 7 or 8, wherein the landmark or the building name is displayed at the top of the building displayed in a three-dimensional manner. A map display method on a display in a navigation device,
A map display method in which, when a map around the position of the vehicle is displayed on a display, only the vicinity of the road on which the vehicle is traveling is displayed in a three-dimensional display, and the other is displayed in a plan view or a bird's eye view. The map display method according to claim 10, wherein when the own vehicle approaches an intersection, the intersection is displayed in a three-dimensional display. The map display method according to claim 10, wherein an identification display is given to a target object for route guidance within an intersection displayed by radial three-dimensional display. The map display method according to any one of claims 10 to 12, wherein the magnification of the three-dimensional display of the intersection is enlarged when the distance from the own vehicle position to the intersection is within a certain range. The map display method according to claim 10, wherein when a landmark is displayed on a three-dimensionally displayed building, the landmark is displayed on the top of the building based on height data about the building. The map display method according to claim 10, wherein when a building name is displayed on a three-dimensionally displayed building, the building name is displayed on the top of the building based on height data about the building.

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