JPH09210706A - Car navigation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device to be mounted on a car which enables a driver to easily recognize whether the driver's car can enter roads crossing the road on which he drives the car. SOLUTION: A detection circuit 14-1 detects one-way roads prohibiting the entry from the road on which a driver drives a car out of the information of the roads displayed on a display unit 10 and a discriminating circuit 14-2 judges whether the detected roads are one-way for the whole day or one-way depending on a time period. The discriminating circuit 14-3 judges that it is the time for the one-way roads judged one-way depending on a time period for one-way, the first indication prefixed under the control of a display control circuit 14-4 is displayed to each roads judged one-way for the whole day and the second indication is displayed under the control of the display control circuit 14-4 to each side of the one-way roads depending on a time period which is not at towed to enter within the time when the roads are not allowed to enter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device, and more particularly to a vehicle-mounted navigation device in which a one-way display is easily visible.

[0002]

2. Description of the Related Art In conventional vehicle-mounted navigation devices, one-way display is not available. on the other hand,
When performing a route search, the route search is performed taking into account one-way roads. Even in this case, the user cannot directly visually recognize which road is a one-way road.

[0003]

As described above, when the one-way display is performed in the vehicle-mounted navigation device, for example, in the road map displayed on the display screen of the display device as shown in FIG. It is conceivable to add an arrow along all the one-way roads to indicate that the road is one-way. In FIG. 7, A ₀ indicates the position display of the own vehicle, and the dashed arrow indicates that the road is in one direction, indicating that the vehicle cannot pass in the direction opposite to the direction of the dashed arrow. Although b is the traveling direction of the own vehicle, it is shown by the shape of the own vehicle display.

However, it is not easy to determine whether the road is a one-way road in the display of FIG.
For example, there is a problem in that it is not possible to easily determine whether or not the next road to be advanced is a prohibited road from the display on the in-vehicle navigation device while the vehicle is traveling at the normal speed.

Further, even if the route search is made in consideration of one-way traffic in the route search, when the vehicle is traveling according to the route guidance found, the reason why, for example, the traffic congestion information is received in the middle of the course. There may be a case where the driving route has to be changed. In such a case, there is a problem that road information such as one-way road cannot be known in advance, it becomes difficult to change the course, and a large detour is necessary if the approach road is wrong.

It is an object of the present invention to provide a vehicle-mounted navigation device that displays whether or not a road intersecting a road on which a vehicle is advancing is easily visible.

[0007]

A vehicle-mounted navigation device according to the present invention is a vehicle-mounted navigation device that displays a map on a display device and a position of a vehicle while the map is displayed. Based on the information based on the information, the detection means that detects one-way roads where entry of the vehicle from the road is prohibited, and whether the roads detected by the detection means are always one-way roads A first discriminating means for discriminating whether or not the road is a road, and a first display for performing a predetermined first display on the road discriminated by the first discriminating means to be a one-way road at all times. The control means, the second determining means for determining whether or not the road, which is determined to be one-way by the time zone by the first determining means, is currently in the one-way time zone, and the second determining means. When it is determined by the means that the present time is within the one-way time zone, a predetermined second display is provided on the entry prohibited side of the corresponding road, and when it is determined that it is not within the time zone, the first road The second display control means for erasing the second display is provided.

In the vehicle-mounted navigation device according to the present invention, the detecting means detects a one-way road in which entry from the road on which the vehicle is in progress is prohibited from the information based on the road displayed on the display device. The first determining means determines whether the detected road is a one-way road that is always one-way or a one-way road depending on the time of day. First
On the road which is determined to be a one-way road at all times by the determination means, the first display which is predetermined under the control of the first display control means is displayed. On the other hand, if the road determined to be one-way by the time zone by the first discriminating means is currently in the one-way time zone,
During the period determined by the determination means of No. 2, the second display determined in advance under the control of the second display control unit is displayed on the inaccessible side of the road, and if the current time is not within the time zone, the second display is displayed.
The second display is erased under the control of the second display control means during the period when the second display control means determines.

Therefore, the first display is made on the one-way road which is always displayed on the display device, and even if the one-way road displayed on the display device is one-way traffic depending on the time zone. The second display will be displayed on the inaccessible side of the relevant road within that time zone. As a result, the one-way roads that are always one-way and the one-way roads are differentiated by the display depending on the time zone, and the one-way roads are displayed on the entry prohibition side only during the relevant time zone on the display screen. It becomes easy to visually recognize.

Further, when the vehicle is traveling according to the route guidance found, even if the traveling route has to be changed due to, for example, the reception of traffic congestion information, the one-way road or the like is required. Knowing the information ahead of time does not make it difficult to change course.

A vehicle-mounted navigation device according to the present invention is a vehicle-mounted navigation device that displays a map on a display device and a position of a vehicle while the map is being displayed. A detection means for detecting a one-way road which is located ahead of the position and is prohibited from entering from the road on which the vehicle is traveling, and whether the road detected by the detection means is a one-way road at all times. A first discriminating means for discriminating whether or not the road is a one-way road, and a first predetermined display for a road which is discriminated to be a one-way road at all times by the first discriminating means. Display control means, and second determination means for determining whether or not the road determined to be one-way by the first determination means according to the time zone is currently in the one-way time zone. When it is determined by the second determining means that the present time is within the one-way time zone When a predetermined second display is performed on the entry prohibited side of the corresponding road, and it is determined that it is outside the time zone Is equipped with a second display control means for erasing the second display of the road.

The on-vehicle navigation system according to the present invention detects a one-way road which is located in front of the vehicle position and is prohibited from entering from the road on which the vehicle is running.
When the detected road is a one-way road at all times, the first display is given to the road, and even if the road is a one-way road, if the road is one-way traffic depending on the time zone, the second display is made within that time zone. Is displayed on the inaccessible side of the road, and the second display is erased outside the time zone. As a result, the one-way roads that are always one-way and the one-way roads are distinguished by the display according to the time zone, and the one-way roads are displayed as the second display on the no-entry side only during the corresponding time zone. Since the display is erased outside the relevant time zone, it is easy to visually recognize it on the display screen.

Further, when the vehicle is traveling according to the route guidance found, even if the traveling route has to be changed due to, for example, the reception of traffic congestion information, the road information such as one-way traffic is required. You will be able to know in advance, and it will not be difficult to change course.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicle-mounted navigation device according to the present invention will be described. FIG. 1 is a block diagram showing the configuration of a vehicle-mounted navigation device according to an embodiment of the present invention.

A vehicle-mounted navigation device according to an embodiment of the present invention includes a CD-ROM 1 in which data for indicating a relationship between a plurality of map data and each map data and data for each map search are recorded. And a GPS signal receiving device 2 mounted on the vehicle for receiving signals from GPS satellites to measure the position and traveling direction of the vehicle, an angle sensor for detecting the relative moving direction of the vehicle, and the like. Positioning device 5 including a direction sensor 3 and a distance sensor 4 that detects a relative traveling distance of the vehicle, a buffer memory 6 that stores map data read from the CD-ROM 1 over a plurality of display ranges, and a CD. A character generator 7 for displaying characters corresponding to the character code in the map data recorded in the ROM 1, and a CD-ROM as coordinate data. Graphic display controller for displaying an image based on the map data recorded in the image memory 9 in cooperation with the display device 10 (hereinafter, referred to as GDC) and a 8.

The vehicle-mounted navigation device according to the embodiment of the present invention further includes a CPU 14 and a clock circuit 1.
1. ROM 1 in which programs of CPU 14 are stored
2. A RAM 13 including a work area for temporarily storing data when the CPU 14 performs calculation is provided.

Based on a program stored in the ROM 12, the CPU 14 receives a signal from the GPS signal receiving device 2, a signal from the azimuth sensor 3 and a signal from the distance sensor to calculate the position of the vehicle and the traveling direction of the vehicle. , CD-RO the map data of the predetermined range including the calculated own vehicle position
M1 is read and written in the buffer memory 6, the map data in the range where the vehicle position is at the predetermined display position on the display device 10 is read from the buffer memory 6, and GD is read.
Image memory 9 after controlling C8 and converting into image data
The character data corresponding to the character code in the map data is read from the character generator 7 and stored in the image memory 9, and the map and the character based on the image data and the character data stored in the image memory 9 are stored in the vehicle position. It is also displayed on the display device 10.

Here, the image memory 9 has a plurality of screens such as a screen for displaying the vehicle position mark, a screen for displaying a map including roads, a screen for displaying characters, a screen for displaying traffic information, and the like. With a screen capacity, CPU 14 and G
The display of each screen is superimposed on the screen of the display device 10 under the control of the DC 8.

In the CD-ROM 1, road information is also recorded as coordinate data together with map data, and road names, intersection names, road positions, one-way road flags, and one-way road condition flags are recorded. The flag distinguishes between one-way traffic without conditions and one-way traffic with conditions. One-way traffic without conditions is always one-way regardless of the time zone, and one-way traffic with conditions indicates whether there is a one-way time zone by a flag.
On the other hand, in the on-vehicle navigation device according to the present embodiment, for one-way traffic with conditions, information on the time zone of one-way traffic corresponding to the road is stored in advance in, for example, a separately provided ROM (not shown). Therefore, by referring to the relevant road, information on the time zone in which the road is a one-way road can be known. The time zone information may be stored in the CD-ROM 1 instead of the separately provided ROM (not shown).

Further, the CPU 14 detects whether the road within the display range of the display device 10 is a one-way road which is located ahead of the own vehicle position and is prohibited from entering from the road on which the own vehicle is in progress. Detection circuit 14-1 and detection circuit 1
The judgment circuit 14-2 for judging whether the road detected by 4-1 is a one-way road at all times or a one-way road according to the time zone, and one according to the time zone by the judgment circuit 14-2. A discriminating circuit 14-3 for discriminating whether or not the present time is within the one-way time zone by comparing the one-way time zone of the road which is discriminated to be a traffic and the present time by the clock circuit 11. A predetermined first mark display, for example, a plurality of parallel diagonal lines is displayed on the road which is always judged as one-way road by the circuit 14-2, and the one-way road is judged by the judgment circuit 14-2 depending on the time zone. For a road which is determined to be a road which is determined to be a road which is determined by the determination circuit 14-3 and the determination circuit 14-3 determines that the current time is within the one-way time, It includes functionally and a display control circuit 14-4 for performing a plurality of parallel dashed in Guyo.

Here, the detection circuit 14-1 corresponds to the detection means, the discrimination circuit 14-2 corresponds to the first discrimination means, the discrimination circuit 14-3 corresponds to the second discrimination means, and the display control is performed. The circuit 14-4 corresponds to the first and second display control means.

The operation of the vehicle-mounted navigation device according to the present embodiment configured as described above will be described with reference to the flowchart shown in FIG. In the vehicle-mounted navigation device according to the present embodiment, the position of the own vehicle and the traveling direction of the own vehicle are measured every predetermined period. More specifically, in the positioning of the vehicle position and the traveling direction of the vehicle, the vehicle position and the traveling direction of the vehicle based on the signal from the GPS signal receiving device 2 are the direction sensor 3 and the distance sensor 4.
The position of the host vehicle and the direction of travel of the host vehicle are corrected by the correction based on the position and the traveling direction based on the signal from (step S1).

Subsequent to step S1, based on the corrected vehicle position and the vehicle moving direction, the map data including the vehicle position is retrieved from the CD-ROM 1 and is a multiple of the display range of the display device 10. Read, read,
It is stored in the buffer memory 6. The map data stored in the buffer memory 6 is stored in the image memory 9 under the control of the CPU 14 and the GDC 8 after the map data including the road in the range where the own vehicle position is located at a predetermined position is converted into image data. It Further, the character data corresponding to the character code displayed together with the display based on the stored image data is read from the character generator 7 and stored in the image memory 9, and the mark indicating the vehicle position is stored in the image memory 9. Then, the map, the characters and the vehicle position mark are displayed in a superimposed manner on the display device 10 (step S2).

Following step S2, a display based on one-way road information on the road ahead of the vehicle position mark displayed in step S2 is displayed on the display device 10 (step S3).

Step S3 will be described with reference to the flowchart of FIG. 3 and the schematic diagram showing the road skeleton of FIG.

In the example shown in FIG. 4, the traveling road of the vehicle is a
₀ , roads located in front of the own vehicle in the screen displayed by the display device 10 and intersecting with the road a _{0 on} which the own vehicle is traveling are a ₁ , a ₂ , ..., A ₈ , a ₉ , Roads a ₁ , a ₂ , ..., A ₈ , a that intersect with the road a _{0 on} which the vehicle is in progress.
The intersection with ₉ is indicated by A ₁ , A ₂ , ..., A ₆ , A ₇ ,
Corresponding coordinates of the intersections A ₁ , A ₂ , ..., A ₆ , A ₇ , respectively, corresponding to (X ₁ , Y ₁ ), (X ₂ , Y ₂ ), (X ₆ , Y ₆ ), (X
₇ , Y ₇ ). Here, it is assumed that the road a ₁ is always one-way and the roads a ₅ and a ₇ are one-way with conditions.

Subsequent to step S2, it is checked whether or not there is a road located on the display screen in step S2 and in front of the position of the own vehicle mark and intersecting the road on which the own vehicle is proceeding (step S2). S31). Step S31
When the position of the host vehicle is set to the position A ₀ (X ₀ , Y ₀ ), it is determined whether or not there is a road that intersects the road a _{0 in} which the host vehicle is in progress, at the coordinate position of (Yi> Y ₀ ). (Xi, Y
It is determined by checking whether or not there is an intersection having i). When it is determined that there is an intersection, it is determined that there is a road that intersects with the road a _{0 in} which the vehicle is traveling. In this case, Xi may be equal to or different from X ₀ . Here, i is a natural number of 1 or more.

When it is determined in step S31 that there is no road located ahead of the own vehicle position and intersecting the road on which the own vehicle is traveling, step S3 is ended. If it is determined in step S31 that there is a road, then, following step S31, it is checked whether or not each of the roads located in front of the vehicle position and intersecting the road in which the vehicle is traveling is a one-way road. (Step S32).

For checking whether or not the road is a one-way road in step S32, the contents stored in the buffer memory 6 are referred to for a road which is located in front of the own vehicle position and which intersects with the road on which the own vehicle is in progress. This is done by checking whether the one-way flag or the conditional one-way flag is set. When it is determined by executing step S32 that there is no road for which the one-way flag or the conditional one-way flag is set, step S3 is ended following step S32.

If it is determined in step S32 that there is a road for which the one-way flag or conditional one-way flag is set, information on the road for which the one-way flag or conditional one-way flag is set is one-way. With flags or conditional one-way flags,
It is stored in a register formed in the work area of the RAM 13. When the one-way traffic is conditional upon this storage, the one-way time zone of the road on which the one-way traffic flag with the condition is set is searched from the ROM (not shown) described above so that it can be searched from the one-way traffic with the condition. It is attached and stored in the register.

Following the step S32, the RAM 1
The contents of the register formed in the work area of No. 3 are referred to, the road information stored in the register is read out, and it is checked whether or not the road based on the road information is a one-way road with a condition (step S33). ). Step S33
When it is determined that the road is not a one-way road with conditions, a first designated mark display, that is, a plurality of parallel diagonal lines is displayed on the road on the road display (step S34), and the road is stored in the register. It is checked whether all the one-way roads that have been read have been read (step S37). The road on which step S34 is executed is always a one-way road.

When it is determined in step S37 that all the road information stored in the register has not been read out, step S33 is repeatedly executed after step S37 until all the road information is read out. .

When it is determined in step S33 that the road is a one-way road with a condition, the information on the one-way time zone of the road stored in the register is read out and is output to the clock circuit 11. It is checked whether or not the current time based on the one-way traffic is within the time zone (step S35). As a result of the check in step S35,
When it is determined that the current time based on the output from the clock circuit 11 is within the one-way time zone, the road is a one-way time zone and the entry of the road is prohibited. A predetermined second designated mark is displayed on the side, for example, a plurality of parallel broken lines is displayed so as to block the road (step S36), and step S37 is executed.

When it is determined as a result of the check in step S35 that the current time based on the output from the clock circuit 11 is not within the one-way time zone, step S35
Then, the second designation mark display displayed on the approach side of the road is erased, and step S37 is executed. In this case, the time is outside the one-way time zone.
When it is determined in step S37 that all the road information stored in the register has been read, step 3 is ended following step S37.

FIG. 5 is a map display for the road skeleton shown in FIG. In FIG. 5, the inside of the one-dot chain line is displayed on the display device 10. Explaining with reference to FIGS. 4 and 5, the road a ₁ , which is located in front of the own vehicle position and intersects with the road on which the own vehicle is in progress,
Since a ₂ , ... A ₈ and a ₉ exist, it is determined in step S31 that there is a road that is located in front of the own vehicle position and intersects with the road on which the own vehicle is proceeding, and roads a ₁ , a ₅ , Since a and a ₇ are one-way roads, it is determined in step S32 that a one-way road exists. further,
Road a ₁ is a one-way road, and steps S33 and S3
4 and S37, the road a as shown in FIG.
Multiple parallel diagonal lines are displayed above ₁ to indicate that the road is always a one-way road.

Since the roads a ₅ and a ₇ are conditional one-way roads, it is determined in step S332 that a one-way road exists. Further, the roads a ₅ and a ₇ are conditional one-way roads, and the steps S33,
By executing steps S35, S36 and step S37, a plurality of parallel broken lines are displayed on the prohibited side of the roads a ₅ and a ₇ so as to block the roads as shown in FIG. Is displayed, the display is made when it is in the one-way time zone, and the display is erased when it is not in the one-way time zone.

FIG. 6 exemplifies the display of roads on another map, and shows one-way display at all times and one-way one-way display with conditions. Also in FIG. 6, the inside of the one-dot chain line is shown to be displayed on the display device 10.

In the above-mentioned one embodiment, the display device 10 exemplifies the case where the one-way display is performed for the road located ahead of the own vehicle position, but the road located behind the road may be displayed. Absent. This is because the vehicle position is not actually displayed on the display device 10 at the top of the traveling direction.

[0039]

As described above, according to the vehicle-mounted navigation device of the present invention, the one-way road which is always one-way and the one-way road are distinguished by the display, and the one-way road which is one-way is distinguished by the time zone. Since the display is displayed on the prohibition side only during the relevant time zone, there is an effect that it is possible to easily visually confirm on the display screen whether or not a road intersecting the road on which the vehicle is advancing can enter.

According to the vehicle-mounted navigation device of the present invention, when the vehicle is traveling in accordance with the route guidance found, the traveling route can be changed due to, for example, the reception of traffic congestion information. Even if it is unavoidable, there is an effect that road information such as one-way traffic can be known in advance, and there is no difficulty in changing the course.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle-mounted navigation device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the vehicle-mounted navigation device according to the embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the vehicle-mounted navigation device according to the embodiment of the present invention.

FIG. 4 is a schematic diagram showing a road skeleton for explaining the operation of the vehicle-mounted navigation device according to the embodiment of the present invention.

FIG. 5 is a diagram of a display screen for explaining the operation of the vehicle-mounted navigation device according to the embodiment of the present invention.

FIG. 6 is a diagram of another display screen for explaining the operation of the vehicle-mounted navigation device according to the embodiment of the present invention.

FIG. 7 is a view of a display screen that can be considered in the case of a conventional vehicle-mounted navigation device.

[Explanation of symbols]

 1 CD-ROM 5 Positioning device 6 Buffer memory 7 Character generator 8 GDC 9 Image memory 10 Display device 11 Clock circuit 12 ROM 13 RAM 14 CPU 14-1 Detection circuit 14-2 and 14-3 Discrimination circuit 14-4 Display control circuit

Claims (2)

[Claims] 1. In a vehicle-mounted navigation device that displays a map on a display device and a position of a vehicle while the map is displayed, information indicating that the vehicle is approaching from an ongoing road is displayed in the information based on the road displayed on the display device. A first detecting means for detecting a prohibited one-way road and a first detecting means for judging whether the road detected by the detecting means is a one-way road at all times or a one-way road depending on a time zone. Discriminating means, first
The first display control means for displaying a predetermined first display on the road which is always judged as the one-way road by the judgment means and the one-way road is judged by the first judgment means depending on the time zone. Second determining means for determining whether or not the road is currently in a one-way time zone;
When it is determined by the second determining means that the present time is within the one-way time zone When a predetermined second display is performed on the entry prohibited side of the corresponding road, and it is determined that it is outside the time zone Is a vehicle-mounted navigation device comprising: second display control means for deleting the second display of the road. 2. A vehicle-mounted navigation device for displaying a map on a display device and displaying the position of a vehicle while the map is being displayed, wherein the vehicle is located ahead of the position of the vehicle based on the road-based information displayed on the display device. A detection means for detecting a one-way road where vehicles are prohibited from entering from a road in progress, and the road detected by the detection means is always a one-way road or a one-way road depending on a time zone. A first discriminating unit that discriminates whether or not the first discriminating unit discriminates whether the road is a one-way road that is always discriminated by the first discriminating unit.
And a second display control means for displaying whether or not the road, which has been determined to be one-way by the time zone by the first determination means, is currently in a one-way time zone. When the discriminating means and the second discriminating means determine that the current time is within the one-way time zone, a predetermined second display is made on the entry prohibited side of the corresponding road,
The vehicle-mounted navigation device further comprises a second display control means for erasing the second display of the road when it is determined that it is outside the time zone.