JP4248170B2 - Navigation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation apparatus that has a function of guiding a vehicle along a guidance route and displaying an enlarged view of an intersection when the vehicle approaches a guidance target intersection, and in particular, a distance between the vehicle position and the guidance target intersection is approached. The present invention relates to a navigation device that displays an enlarged view of an intersection corresponding to a vehicle position and a distance to a guidance target intersection.
[0002]
[Prior art]
A navigation device that provides vehicle travel guidance and allows a driver to reach a desired destination, detects the position of the vehicle, reads map data around the vehicle position from a storage medium such as a DVD-ROM, and maps An image is drawn on the display screen, and a vehicle position mark (vehicle position mark) is drawn at a predetermined position on the map image. As the current position changes due to the movement of the vehicle, the vehicle position mark on the screen is moved, or the vehicle position mark is fixed at a predetermined position such as the center of the screen and the map is scrolled to always The map information around you can be seen at a glance. Such a navigation device searches for a guidance route from a departure place to a destination, displays the guidance route on a map, displays an enlarged view of an intersection, a traveling direction, and the like at a guidance target intersection, and performs a guidance for the intersection. It has.
[0003]
[Problems to be solved by the invention]
However, the user must recognize necessary information such as the vehicle position and the distance to the intersection, the traveling direction, landmarks as landmarks, and the like from the displayed enlarged view of the intersection. For this reason, when approaching an intersection, it is necessary to grasp the surroundings of pedestrians, traffic lights, nearby vehicles, etc., but it is difficult to drive safely because the enlarged view of the intersection is watched to obtain the necessary information. There was a problem of bringing
[0004]
As described above, an object of the present invention is to provide a navigation device that provides accurate intersection guidance without causing a user to pay more attention to an enlarged intersection view than necessary to obtain necessary information from the enlarged intersection view at the time of intersection guidance. It is.
[0005]
[Means for Solving the Problems]
According to the present invention, according to the present invention, when the vehicle position approaches a guidance target intersection to a predetermined distance during guidance route guidance, an enlarged view of the intersection corresponding to the guidance target intersection is displayed, and the distance to the intersection is handled. This is achieved by erasing the enlarged intersection map displayed in steps .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
(A) Schematic description of the present invention FIG. 1 is a first schematic explanatory diagram of the present invention and is an explanatory diagram when an enlarged view of an intersection is displayed. In the figure, 28 is a display unit, RT is a guidance route, and LM1 is a landmark, which serves as a mark when performing route guidance in the display of an enlarged intersection, and is also guided by voice guidance. LM2 and LM3 are landmarks that serve as landmarks when route guidance is displayed in an enlarged view of an intersection, RD1 and RD2 are roads that serve as guidance routes, and RD3, RD4, and RD5 are connected to intersections that perform route guidance. Roads and CMs are vehicle position marks.
[0008]
In the navigation device according to the present invention, when the vehicle position approaches the guidance target intersection up to a predetermined distance during guidance route guidance, an enlarged intersection view corresponding to the guidance target intersection is shown in FIG. At the same time, the guidance route RT, a landmark when performing route guidance, and the landmark LM1 and the like which are also guided by voice guidance are displayed on the display unit 28.
[0009]
Then, as the distance between the vehicle position CM and the guidance target intersection approaches, for example, as shown in FIG. 1B, the landmark LM1, the guidance route RT, and the guidance route that are also guided by voice guidance are obtained. An enlarged view of the intersection expressing the roads and landmarks other than the existing roads RD1 and RD2 in light color is displayed on the display unit 28. Furthermore, when the distance between the vehicle position CM and the intersection to be guided approaches, as shown in FIG. 1C, only the landmark LM1, the guidance route RT, and the roads RD1 and RD2 that are the guidance route are also guided by voice guidance. Is displayed on the display unit 28.
Accordingly, it is possible to provide a navigation device that provides accurate intersection guidance without requiring the user to pay more attention than necessary to obtain necessary information from the enlarged intersection map at the time of intersection guidance.
[0010]
FIG. 2 is a second schematic explanatory diagram of the present invention, and is an explanatory diagram when an enlarged view of an intersection is displayed. In the figure, 28 is a display unit, RT is a guidance route, and LM1 is a landmark, which serves as a mark when performing route guidance in the display of an enlarged intersection, and is also guided by voice guidance. LM2 and LM3 are landmarks that serve as landmarks when route guidance is displayed in an enlarged view of an intersection, RD1 and RD2 are roads that serve as guidance routes, and RD3, RD4, and RD5 are connected to intersections that perform route guidance. Roads and CMs are vehicle position marks.
[0011]
In the navigation device of the present invention, when the vehicle position approaches the guidance target intersection up to a predetermined distance during guidance route guidance, an enlarged intersection view corresponding to the guidance target intersection is shown in FIG. At the same time, the guidance route RT, a landmark when performing route guidance, and the landmark LM1 and the like which are also guided by voice guidance are displayed on the display unit 28.
[0012]
Then, as the distance between the vehicle position CM and the guidance target intersection approaches, for example, as shown in FIG. 2B, an enlarged enlarged view of the intersection enlarged view expressed in light color is displayed on the display unit 28. . Further, when the distance between the vehicle position CM and the guidance target intersection approaches, as shown in FIG. 2 (c), the entire intersection enlarged view is expressed in a lighter color than the intersection enlarged view shown in FIG. 2 (b). An enlarged view is displayed on the display unit 28, and the intersection enlarged view is not displayed when the vehicle position CM enters the guidance target intersection.
Thus, accurate intersection guidance can be performed without the user paying more attention than necessary to obtain necessary information from the enlarged intersection map at the time of intersection guidance.
[0013]
(B) First Embodiment of the Present Invention (a) Navigation Device FIG. 3 is a block diagram of the navigation device of the first embodiment of the present invention. In the figure, 11 is a map storage medium for storing map information, for example, a DVD-ROM, 12 is a DVD-ROM control unit for controlling reading of map information from the DVD-ROM, and 13 is a position measurement for measuring the current vehicle position. This device is composed of a vehicle speed sensor that detects a moving distance, an angular velocity sensor that detects a moving direction, a GPS receiver, a CPU for position calculation, and the like. 14 is a map information memory for storing the map information read from the DVD-ROM, 15 is a remote control for performing menu selection operation, enlargement / reduction operation, destination setting, etc. 16 is a remote control interface.
[0014]
Reference numeral 17 denotes a processor (CPU) that controls the entire navigation apparatus, 18 denotes a ROM that stores various programs (guidance route search processing program, intersection enlarged view generation program, etc.), and 19 denotes a RAM that stores the processing results of processing performed by the CPU 17. , 20 is a guidance route memory for storing the guidance route searched by the CPU 17, and 21 is an intersection enlarged view memory, which becomes a plurality of intersection enlarged views, for example, a normal intersection enlarged view and a guidance route for one intersection. Stores multiple sets of enlarged intersections that represent roads connected to intersections other than waxy roads in light color, and further enlarged sets of intersections that represent roads connected to intersections other than roads that are likely to be guide routes in light color .
[0015]
22 is a display controller that generates a map image and controls the contrast and color tone, 23 is a video RAM that stores the map image generated by the display controller, 24 is a menu generation unit that generates a menu image, and 25 is a guidance path generation unit. Yes, the processing result of the guidance route search processing program stored in the guidance route memory 20 is used. Reference numeral 26 denotes a mark generating unit that generates a mark such as a vehicle position mark or a landmark, 27 denotes an image combining unit that combines and outputs various images, and 28 denotes a display device that displays an image output from the image combining unit. The display controller 22 controls power on / off, contrast, and the like. Reference numeral 29 denotes a voice generating unit that generates a voice at the time of route guidance, 30 denotes a speaker that outputs the voice generated by the voice generating unit to the outside, and 31 denotes a bus.
[0016]
(B) Storage contents of guidance route memory and intersection enlarged view memory The guidance route memory 20 stores the guidance route calculated by the CPU 17. As shown in FIG. 4, the guidance route memory 20 is associated with each node from the starting point to the destination, and the position of each node, an intersection identification flag indicating whether or not each node is an intersection, and when the node is an intersection A pointer indicating which intersection of the enlarged intersection map stored in the enlarged intersection map memory 21 corresponds is stored.
[0017]
Then, the intersection enlarged map memory 21 displays a plurality of intersection enlarged views for one intersection, for example, a normal intersection enlarged view (intersection enlarged view 1), roads connected to intersections other than the road that will be a guide route. An intersection enlarged view (intersection enlarged view 2) expressed in light color, and an enlarged intersection view (intersection enlarged view 3) expressing roads connected to intersections other than roads that are likely to become guide routes in light color are stored. .
[0018]
(C) Flowchart of the first embodiment of the present invention FIG. 5 is a flowchart of the first embodiment of the present invention. First, based on the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20, the CPU 17 (FIG. 3) determines that the distance from the vehicle to the intersection to be guided during traveling on the guidance route is 300 m or less. It is determined whether or not (step 101). If the distance between the vehicle and the intersection to be guided is not 300 m or less, the determination process in step 101 is continued. If the distance from the vehicle to the intersection to be guided is 300 m or less, the CPU 17 provides guidance. Of the enlarged intersection map corresponding to the intersection to be read, a normal enlarged intersection map is read out from the enlarged intersection map memory 21, and the read out enlarged normal intersection map is displayed via the display controller 22, the video RAM 23, and the image composition unit 27. (Step 102). At this time, the mark generator 26 sends the landmarks necessary for the enlarged intersection view to the image composition unit 27 and displays the landmarks together.
[0019]
Next, based on the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20, the CPU 17 determines whether or not the distance to the intersection to be guided with the vehicle during traveling on the guidance route has become 100 m or less. (Step 103), and if the distance between the vehicle and the intersection to be guided is not less than 100 m, the determination process in step 103 is continued. On the other hand, when the distance from the own vehicle to the intersection to be guided is less than 100 m, the CPU 17 is connected to an intersection other than the guide route from the ordinary intersection enlarged view of the intersection enlarged view corresponding to the intersection to be guided. The second enlarged intersection map representing the road in light color is read from the enlarged intersection map memory 21, and the read second enlarged map is displayed on the display device 28 via the display controller 22, the video RAM 23, and the image composition unit 27. (Step 104).
[0020]
Next, the CPU 17 determines from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20 whether the distance to the intersection to be guided with the vehicle during traveling on the guidance route has become 30 m or less. If it is determined (step 105) and the distance from the vehicle to the intersection to be guided is not less than 30 m, the determination process of step 105 is continued. On the other hand, when the distance from the own vehicle to the intersection to be guided is 30 m or less, the third color representing the road connected to the intersection other than the guidance route in a lighter color than the intersection enlarged view read out by the CPU 17 in step 104. Is read from the enlarged intersection map memory 21, and the read third enlarged enlarged view is displayed on the display device 28 via the display controller 22, the video RAM 23, and the image composition unit 27 (step 106).
[0021]
Next, the CPU 17 determines from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20 whether or not the vehicle has passed the intersection guided by the enlarged intersection map (step). 107) If it is determined that it has not passed, the determination process of step 107 is continued. On the other hand, if it is determined that the vehicle has passed the intersection guided by the enlarged intersection map, a normal map is read from the map information memory 14 and displayed on the display device 28 (step 108).
[0022]
(C) Second embodiment of the present invention (a) Storage contents of navigation device, guidance route memory and intersection enlarged view memory The configuration of the navigation device of the second embodiment of the present invention is the same as that of the first embodiment (FIG. 3). Yes, the guidance path memory 20 is the same as that of the first embodiment (FIG. 4). The intersection enlarged map memory 21 has a plurality of intersection enlarged views for one intersection, for example, a normal intersection enlarged view (intersection enlarged view 1), and an intersection when the host vehicle enters from each road connected to the intersection. An enlarged view (intersection enlarged view 2 to 2) is stored.
[0023]
(B) Flowchart of the second embodiment of the present invention FIG. 6 is a flowchart of the second embodiment of the present invention. First, based on the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20, the CPU 17 (FIG. 3) determines that the distance from the vehicle to the intersection to be guided during traveling on the guidance route is 300 m or less. It is determined whether or not (step 201). If the distance between the vehicle and the intersection to be guided is not 300 m or less, the determination process in step 201 is continued. If the distance from the vehicle to the intersection to be guided is 300 m or less, the CPU 17 provides guidance. The intersection enlarged view corresponding to the approach direction of the vehicle is read from the enlarged intersection view memory 21 among the enlarged enlarged views corresponding to the intersection to be read, and the read normal enlarged enlarged view is displayed on the display controller 22, the video RAM 23, and the image composition unit 27. Is displayed on the display device 28 (step 202). At this time, the mark generator 26 sends the landmarks necessary for the enlarged intersection view to the image composition unit 27 and displays the landmarks together.
[0024]
Next, the CPU 17 determines from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20 whether or not the distance to the intersection to be guided with the vehicle during traveling on the guidance route is 200 m or less. Determination is made (step 203). If the distance from the host vehicle to the intersection to be guided is not less than 200 m, the determination process of step 201 is continued. If the distance from the host vehicle to the intersection to be guided is 200 m or less, the CPU 17 displays An instruction to lower the contrast by a predetermined ratio, for example, 30% is sent to the controller 22, and the display controller 22 lowers the contrast by 30% (step 204).
[0025]
Next, in response to an instruction from the CPU 17, the voice generation unit 29 provides voice guidance through the speaker 30 that the distance to the intersection to be guided is 200 m or less (step 205). Next, the CPU 17 monitors the distance to the intersection to be guided with the vehicle during traveling on the guidance route from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20, and generates sound at intervals of 50m. An instruction is sent to the unit 29 to perform voice guidance, and the voice generation unit 29 guides the distance to the intersection to be guided through the speaker 30 by voice (step 206).
[0026]
Next, the CPU 17 determines from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20 whether the distance to the intersection to be guided with the vehicle during traveling on the guidance route has become 100 m or less. Determination is made (step 207). If the distance from the vehicle to the intersection to be guided is not less than 100 m, the process returns to step 206. If the distance from the vehicle to the intersection to be guided is less than 100 m, the CPU 17 displays the display controller. An instruction to lower the contrast to a predetermined ratio, for example, 30% is sent to 22, and the display controller 22 further lowers the contrast by 30% (step 208).
[0027]
Next, the CPU 17 monitors the distance to the intersection to be guided with the vehicle during traveling on the guidance route from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20, and voices at intervals of 30m. The generation unit 29 is instructed to perform voice guidance, and the voice generation unit 29 provides voice guidance to the intersection to be guided through the speaker 30 (step 209).
[0028]
Next, the CPU 17 determines from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20 whether or not the distance to the intersection to be guided with the vehicle during traveling on the guidance route is 40 m or less. Determination is made (step 210). If the distance from the vehicle to the intersection to be guided is not less than 40 m, the process returns to step 209. If the distance from the vehicle to the intersection to be guided is 40 m or less, the CPU 17 displays the display controller. An instruction to turn off the screen display of the intersection enlarged view is sent to 22, and the display controller 22 turns off the screen display (step 211).
[0029]
Next, the CPU 17 monitors the distance to the intersection to be guided with the vehicle during traveling on the guidance route based on the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20, and voices at intervals of 10m. The generation unit 29 is instructed to perform voice guidance, and the voice generation unit 29 provides voice guidance to the intersection to be guided through the speaker 30 (step 212).
[0030]
Next, the CPU 17 determines from the signal from the position measuring device 13 and the guidance route data stored in the guidance route memory 20 whether or not the vehicle has passed the intersection guided by the enlarged intersection map (step 213). ), When it is determined that it has not passed, the processing of step 212 is continued. On the other hand, if it is determined that the vehicle has passed the intersection guided by the enlarged intersection map, a normal map is read from the map information memory 14 and displayed on the display device 28 (step 214).
[0031]
In the second embodiment, the enlarged view of the intersection is deleted when the own vehicle enters the intersection, but only the arrow of the guidance route may be displayed on the display unit 28 when the own vehicle enters the intersection.
[0032]
【The invention's effect】
As described above, according to the present invention, at the time of guidance route guidance, when the vehicle position approaches the guidance target intersection to a predetermined distance, the enlarged intersection view corresponding to the guidance target intersection is displayed on the display unit. Then, as the distance between the vehicle position and the guidance target intersection approaches, an enlarged view of the intersection expressing the roads and landmarks other than the road serving as the guidance route in a light color is displayed on the display unit. In addition, the landmarks, guidance routes, and enlarged intersection views of only the roads that are the guidance routes are displayed on the display unit when the distance between the vehicle position and the target intersection is approached. Accurate intersection guidance can be performed without gazing at the enlarged intersection map more than necessary to obtain necessary information from the enlarged map.
[0033]
In addition, according to the present invention, when the vehicle position approaches the guidance target intersection to a predetermined distance during guidance route guidance, an enlarged view of the intersection corresponding to the guidance target intersection is displayed on the display unit. Then, as the distance between the vehicle position and the guidance target intersection approaches, an enlarged intersection map showing the entire intersection enlarged map is displayed on the display unit, and the vehicle position enters the guidance target intersection. In some cases, the display of the enlarged intersection map is not displayed, so that the user can obtain the necessary information from the enlarged intersection map at the time of the intersection guidance without giving more attention to the enlarged intersection map than necessary. Can do.
[Brief description of the drawings]
FIG. 1 is a first schematic explanatory view of the present invention.
FIG. 2 is a second schematic explanatory view of the present invention.
FIG. 3 is a configuration diagram of the navigation device of the present invention.
FIG. 4 is an explanatory diagram of storage contents of a guidance route memory and an intersection enlarged view memory;
FIG. 5 is a flowchart of the first embodiment of the present invention.
FIG. 6 is a flowchart of the second embodiment of the present invention.
[Explanation of symbols]
28 ··· Display RT ··· Guidance route LM1 ··· Marking when performing route guidance with display of enlarged intersection map, landmark LM2 guided by voice guidance · · When performing route guidance with display of enlarged intersection map Landmark LM3 as a landmark in the road RD1 as a landmark when the route is guided in the display of an enlarged view of the intersection RD2 as a landmark RD2 as a guidance route RD3 as a guidance route Road RD4 connected to the intersection where the guidance is performed ... Road RD5 connected to the intersection where the guidance is performed ... Road CM connected to the intersection where the guidance is performed ...

Claims (2)

In a navigation device having a function of guiding a vehicle along a guidance route and displaying an enlarged intersection view when the vehicle approaches a guidance target intersection,
A vehicle position measuring unit for measuring the vehicle position;
An operation unit for inputting a destination;
A guidance route search unit for searching for a guidance route by input of the operation unit;
An enlarged intersection storage unit for storing a plurality of enlarged intersections of the intersection on the guidance route;
A display for displaying an enlarged view of the intersection;
When the vehicle position measuring unit determines that the vehicle position has approached the intersection to a predetermined distance during traveling on the guide route, the enlarged intersection map is displayed on the display unit from the enlarged intersection map storage unit, and up to the intersection. A display control unit that erases the enlarged intersection map displayed corresponding to the distance in stages;
A navigation device characterized by comprising: The display control unit lowers the contrast of the enlarged intersection view displayed corresponding to the distance to the intersection;
The navigation device according to claim 1.

Images