JP2002107155A - On-board navigation device, information display method, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device with proper visibility for displaying indication marks of traffic information on a screen, in such a way that they do not superpose on each another. SOLUTION: Parking lot information, superposed on indication marks of traffic regulation information on the screen is eliminated. In addition, parking lot information which is not eliminated is prioritized. When the indication marks of parking lot information of higher priority are superposed on the indication marks of partaking lot information of lower priority, the parking lot information of lower priority is eliminated, and the image of the last remaining information is drawn as the indication marks of parking lot information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle navigation system mounted on a vehicle and capable of superimposing and displaying the current position of the vehicle on a road map, and more particularly to a vehicle navigation system for displaying information on a map without overlapping. The present invention relates to a navigation device.

[0002]

2. Description of the Related Art Conventionally, various types of in-vehicle navigation devices have been developed and used to display the position, direction, and the like of a vehicle on a screen to assist the traveling of the vehicle in order to facilitate traffic. For example, Japanese Patent Application Laid-Open No. 10-038596 discloses a navigation system that guides an optimum route to a destination.

Further, the navigation device has a route guidance function for calculating an optimal route to a destination, taking into account traffic congestion information, traffic regulation information, parking lot information, and the like. In order to perform the route guidance as described above, the navigation device converts road traffic information such as traffic congestion information, traffic regulation information, and parking lot information into V.
ICS (Vehicle Information & Communication System)
Received from a traffic information service called m). The navigation device calculates the road traffic information provided by the above VICS or the like as traffic congestion, regulation, parking lot display, etc., on the map information around the own vehicle position read from a map information storage medium such as a CD-ROM. (Map display form: VICS level 3). As a result, the user can quickly and easily reach the destination through an appropriate route while avoiding traffic congestion points and traffic regulation points, and can easily reach the nearest vacant parking lot.

However, the amount of information provided by VICS is enormous. On the other hand, the display used in the vehicle-mounted navigation device is generally as small as 6 to 8 inches so as not to narrow the field of view of the user. Therefore, VI
If you try to display all traffic information from CS, visibility will be extremely deteriorated, and it will be difficult to obtain necessary information.
The convenience of the navigation device for the user is reduced.

Conventionally, for these displays, the user selects information to be displayed on the display by classifying, for example, traffic regulation information, parking lot information, and the like, and switches display / non-display according to a preset map scale. I went to see only the information I needed.

[0006]

However, it is desirable for a user to be able to obtain all information on the same screen without switching display of necessary information. Further, regarding the parking lot information, since the amount of information to be displayed is too large when there are many parking lots, such as in the city center, the display of the parking lot may hide the display of the necessary traffic regulation (FIG. 7).
(A)). Further, in the display of a relatively middle scale such as 200 m or 300 m, the displayed information makes the map invisible, and the map scale must be switched to the detail level in order to make the road visible. Thus, in the conventional navigation device,
When displaying traffic information such as VICS information, there is a problem that the visibility of the screen is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned technical problems and to provide a navigation device capable of performing display with high visibility. Another object of the present invention is to provide an in-vehicle navigation device capable of displaying various pieces of information provided from the outside so as not to overlap or to be easily viewable.

[0008]

In order to achieve the above object, a vehicle-mounted navigation device according to a first aspect of the present invention has a display screen, and displays map information including the position of the vehicle on the display screen. And a storage means for storing road traffic information including information to be displayed as a display mark on a display screen on which map information is displayed, the storage means being a vehicle-mounted navigation device for performing route guidance as the vehicle travels. Removing, from the road traffic information stored in the storage means, lower information overlapping with higher priority information when displaying the map information as a display mark on a display screen on which the map information is displayed; And display control means for displaying on the display screen.

According to the present invention, the navigation information displayed on the display of the navigation device is a road traffic information displayed using the display mark, and when the information overlaps on the screen, the navigation information has a lower priority. The information is deleted and displayed. As a result, the display marks are displayed so that the display marks do not overlap with each other, mainly on the navigation information that is highly necessary for driving, so that a navigation device with which the driver can easily obtain information and has high visibility is provided.

[0010] In the vehicle-mounted navigation device having the above-mentioned structure, the vehicle-mounted navigation device further comprises a receiving means for receiving road traffic information from the center, wherein the road traffic information includes the road traffic information from the center received by the receiving means. You may.

In other words, navigation information such as traffic congestion information and traffic regulation information transmitted from an information center such as VICS is displayed on the screen so that VICS display marks do not overlap each other, so that the screen is easy to see. be able to.

In order to achieve the above object, a vehicle-mounted navigation device according to a second aspect of the present invention includes a display screen, and displays map information including the position of the vehicle on the display screen.
A vehicle-mounted navigation device that performs route guidance as the vehicle travels, and a receiving unit that receives, from a center, road traffic information including information to be displayed as a display mark on a display screen on which map information is displayed. Storage means for storing the road traffic information received by the receiving means, from the road traffic information stored in the storage means, information overlapping when displayed as a display mark on a display screen on which map information is displayed, And display control means for displaying, on the display screen, information from which the information is deleted according to a predetermined priority and the overlap is removed.

According to the present invention, navigation information such as traffic congestion information and traffic regulation information transmitted from an information center such as VICS can be used for road traffic information displayed using a display mark on the navigation screen. When the information overlaps with each other, the information with lower priority is deleted and displayed. As a result, the VICS display marks are displayed such that the VICS display marks do not overlap with each other, centering on the navigation information that is highly necessary for driving, so that a navigation device with which the driver can easily obtain information and has high visibility is provided.

In order to achieve the above object, a vehicle-mounted navigation device according to a third aspect of the present invention has a display screen, displays map information including the position of the vehicle on the display screen, and displays the progress of the vehicle. A vehicle navigation device that performs route guidance in accordance with the above, and receives from a center road traffic information including traffic regulation information and parking lot information to be displayed as display marks on a display screen on which map information is displayed. Means, first storage means for storing the road traffic information received by the receiving means, and map information displayed on a display screen on which map information is displayed from the parking lot information stored in the first storage means. A first deletion unit that deletes the parking lot information overlapping with the traffic regulation information when displayed as a mark; and a parking lot from which the parking lot information overlapping with the traffic regulation information is removed by the first deletion unit. Second storage means for storing information, from the stored parking information in the second storage means,
When the map information is displayed as a display mark on the display screen on which the map information is displayed, second deletion means for deleting lower-level information overlapping with higher-priority information, and stored in the second storage means. Display control means for displaying, on the display screen, the parking lot information whose overlap has been removed by the second deletion means, together with the traffic regulation information stored in the first storage means. It is characterized by.

According to the present invention, the road traffic information including the traffic regulation information and the parking lot information transmitted from the information center such as the VICS information is received by the receiving terminal and stored in the RAM in the navigation device. . Of the parking lot information stored in the RAM, the parking lot information excluding the parking lot information overlapping with the traffic regulation information when displayed on the screen as the VICS display mark is stored in the buffer. Further, with respect to the parking lot information stored in the buffer, it is determined whether or not the parking lot information overlaps on the screen, and if they overlap, the one with the lower priority is deleted. Then, the traffic regulation information and the parking lot information in the buffer are displayed on the screen. As a result, the traffic regulation mark is displayed without being hidden by the parking lot mark. Furthermore, when the parking lot marks overlap with each other, only those having a higher priority are displayed from the conditions such as the vacancy rate. . Therefore, it is easy to obtain traffic regulation information and parking lot information, and a navigation device with high visibility is provided.

In the vehicle navigation apparatus having the above-mentioned structure, the display control means sets display or non-display of a display mark of the information displayed on a display screen on which map information is displayed, by a user according to a map scale. Possible setting means may be further provided.

[0017] This allows the user to specify the display of the information display mark by the map scale, thereby eliminating the need to switch between the map screen and the information display screen, thereby improving the convenience of the navigation function.

In order to achieve the above object, an information display method according to a fourth aspect of the present invention includes a display screen, and the display screen of an on-vehicle navigation device that performs route guidance as the vehicle travels. An information display method for displaying map information including a position of a vehicle, a receiving step of receiving, from a center, road traffic information including information to be displayed as a display mark on a display screen on which the map information is displayed; From the information received in the step, information that is overlapped when displayed as a display mark on the display screen on which map information is displayed is deleted according to a predetermined priority, and the information with the overlap removed is displayed on the display screen. A display control step to be displayed on the
It is characterized by comprising.

According to the present invention, the navigation information transmitted from the information center such as the VICS is used for the road traffic information displayed using the display mark on the navigation screen when the information overlaps on the screen. The information below the order is deleted and displayed. As a result, focusing on navigation information that is highly necessary for driving, the VICS
Since the display marks are displayed such that they do not overlap with each other, a navigation device with which the driver can easily obtain information and has high visibility is provided.

In order to achieve the above object, a recording medium according to a fifth aspect of the present invention has a display screen, and the display medium of an on-vehicle navigation device that performs route guidance as the vehicle advances. A recording medium storing a program for causing a computer to execute an information display method for displaying map information including a car position, wherein the road traffic includes information to be displayed as a display mark on a display screen on which the map information is displayed. A receiving step of receiving information from a center, and, from the information received in the receiving step, deleting information overlapping when the map information is displayed as a display mark on a display screen on which the map information is displayed, according to a predetermined priority. And a display control step of displaying information on which overlap has been removed on the display screen. The record.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A navigation device according to an embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows the configuration of a system to which the navigation device of the present invention is applied. Describing this system, the vehicle is equipped with a traffic information receiving unit 13 including a radio beacon receiver and the like. The traffic information receiving unit 13 uses the VI
The road traffic information transmitted from the CS center 11 is received via a beacon 12 installed near the road or the like.

FIG. 2 shows the configuration of the on-vehicle navigation device. As shown, this navigation device
A navigation device 21, a GPS receiver 29 connected to the navigation system, a direction sensor 30,
Vehicle speed sensor 31, input device 32, memory drive unit 33
, Display 34, speaker 35, antenna 3
6 is provided.

The navigation device 21 includes a controller 22, a traffic information receiving unit 23, a position detecting unit 24, an input processing unit 25, a memory control unit 26, and a display control unit 27.
And an audio output unit 28.

The controller 22 functions as a control center of the navigation device 21.
a, and peripheral components such as a ROM 22b and a RAM 22c. The CPU 22a is a central processing unit, and performs arithmetic processing and the like necessary for the navigation operation. ROM2
2b is a non-volatile memory, and the navigation device 2
1 is stored. RAM 22c
Is a volatile memory, and internally includes a first buffer, a second buffer, and a third buffer.

The traffic information receiving unit 23 is a VICS center 1
It receives road traffic information transmitted from the first or the like and is connected to the antenna 36. The traffic information receiving unit 23
It comprises a radio beacon receiver, an optical beacon receiver, an FM multiplex receiver, and the like. The controller 22
The road traffic information data received by the traffic information receiving unit 23 is stored in the RAM 22c in the controller 22.

The position detector 24 includes a GPS receiver 29,
The direction sensor 30 and the vehicle speed sensor 31 are connected.
The GPS receiver 29 includes a GPS antenna 38,
Radio waves from an S (Global Positioning System) satellite are received, and the received data is given to the position detection unit 24. The position detector 24 detects the current position of the vehicle based on data from the GPS receiver 29. The azimuth sensor 30 detects the azimuth in the traveling direction of the vehicle, and includes a geomagnetic sensor or a gyro such as a vibration gyro or a gas rate gyro. The vehicle speed sensor 31 detects a moving speed of the vehicle, and includes a wheel speed sensor and the like.

The position detecting section 24 detects the current position of the vehicle based on the outputs of the direction sensor 30 and the vehicle speed sensor 31. Specifically, the outputs of the azimuth sensor 30 and the vehicle speed sensor 31 are integrated over a predetermined sampling period ΔT (for example, ΔT = 1.2 seconds), and the moving distance and azimuth change of the vehicle are set to an accurate initial position. To calculate the current position of the vehicle.

As described above, the position detecting unit 24
S, current position, direction sensor 30 and vehicle speed sensor 31
The current position obtained from the output of is integrated to determine an accurate current position. Note that a so-called map matching process may be performed on the current position of the vehicle calculated as described above.
The map matching process is a technique of selecting a road having the highest correlation coefficient obtained based on a past traveling pattern of a vehicle and correcting the current position of the vehicle on the selected road.

The input processing unit 25 is connected to the input device 32 and processes input data such as destination data input by the user. The input device 32 includes a screen input device such as a touch panel display, and may be operated by a remote controller.

The input device 32 may include a voice input device provided with a voice recognition device. Further, the input device 3
2 may include a recording card reader for reading data recorded on an IC card or the like. The memory control unit 26 reads map information from a memory 37 that is a database of road map information and supplies the map information to the controller 22 according to a request from the controller 22. Memory 37
Is composed of an information storage medium such as a CD-ROM, a DVD-ROM, and an IC card. The memory 37 stores road map information data and auxiliary data (such as road name and place name data) necessary for displaying a road map.

The display control unit 27 includes an LCD (liquid crystal display), a PDP (plasma display), a CRT (cathode ray tube).
And the like. The display 34 may be formed integrally with the navigation device 21 or may be formed separately. The display 34 may be a touch panel display including a touch panel constituting the input device 32 described above. Further, a speaker 35 is connected to the voice output unit 28, and outputs voice guidance such as guidance for traveling to a destination and instructions of various operation procedures.

The operation of the navigation device 21 having the configuration shown in FIG. 2 will be described with reference to the flowcharts of FIGS. The navigation device 21 can display road traffic information in three stages corresponding to the scale of the map displayed on the display 34: full display, non-display, and selection display. The following is the navigation device 2
1 is a flowchart in a case where traffic information, particularly parking lot information, is selectively displayed.

First, the driver inputs a destination from an input device 32 connected to the input processing unit 25 from the start screen. The input processing unit 25 supplies the input destination to the controller 22.

The controller 22 starts a map drawing process (step S301) and reads a destination (step S301).
302). After reading the destination, the controller 22
Reads the current position and traveling direction data of the own vehicle from the position detecting unit 24 and detects the current position of the own vehicle (step S303). Next, the controller 22 refers to the road map data in the memory 37 loaded in the memory driving unit 33 via the memory control unit 26, and calculates an optimal route from the current position to the destination (Step S304). The optimum route is calculated by, for example, the well-known Dijkstra method.

Further, the display area of the road map to be displayed on the display 34 is calculated based on the current position and traveling direction of the vehicle, the optimum route, the designated scale, and the like (step S30).
5). Subsequently, the memory controller 26 is controlled to read the road map information data around the current position of the vehicle from the memory 37 (step S306). Thereafter, the read map information data is provided to the display control unit 27, and a road map is drawn on the display 34 connected to the display control unit 27 (step S307). On the drawn road map, the current position mark is drawn at the detected current position of the own vehicle, and the optimum route to the calculated destination is drawn (step S308).

Subsequently, the controller 22 receives the VI via the traffic information receiving unit 23 and stores the VI stored in the RAM 22c.
The road traffic information data such as the CS information is compared and drawn according to the flowchart shown in FIG. 4, and drawn on the display 34 (step S309). If the movement or rotation of the vehicle is not detected by the position detection unit 24 (step S310), the current map information and traffic information are displayed (steps S308 and S309). The road map information data around the position is read from the memory 37 via the memory control unit 26,
The map information and traffic information displayed on the display 34 are updated (step S306). In accordance with the flow described above, the controller 22 performs a navigation operation when the vehicle runs.

The comparison and drawing processing of the traffic information in step S305 in FIG. 3 will be described with reference to FIG. The controller 22 accesses road traffic information data such as VICS information stored in the RAM 22c, and extracts level 3 (map display form) traffic regulation information and parking lot information (step S401). The controller 22 further reads, from the extracted traffic regulation information and parking lot information, traffic regulation information and parking lot information to be drawn in the area around the own vehicle position,
The data is respectively stored in the first buffer and the second buffer in the RAM 22c (Step S402, Step S403).
Table 1 shows an example of parking lot information obtained as traffic information.

[0038]

[Table 1]

The controller 22 compares the traffic regulation information and the parking lot information with reference to the traffic regulation information stored in the first buffer and the parking lot information stored in the second buffer (step S404). ).

The comparison processing between the traffic regulation information and the parking lot information will be described with reference to FIG. First, the controller 22
Sets the traffic regulation information at the head of the first buffer to A and the parking lot information at the head of the second buffer to B (step S50).
1) Comparing the regulation information A with the parking lot information B, the regulation information A
Is determined when the display mark of the parking lot information B and the display mark of the parking lot information B are displayed on the display (step S50)
2).

The controller 22 determines the overlap of the display marks in the following manner. Display marks such as regulation information and parking lot information are composed of 16 × 16 dots. The determination of whether or not the display marks overlap is performed by comparing the center coordinates (drawing start point coordinates) of the respective display marks. That is, when the center coordinate of one piece of information is (X1, Y1) and the center coordinate of the other piece of information is (X2, Y2),
| X1-X2 | <16, | Y1-Y2 | <16,
Alternatively, if either of the conditions is satisfied, it is determined that they overlap each other.

If it is determined from the above-mentioned criteria that the display marks of the regulation information A and the parking lot information B overlap, this parking lot information B is deleted from the second buffer (step S50).
3). Next, it is determined whether or not the parking lot information B is at the end of the second buffer (step S504). If not, the next lower information in the second buffer is set as the parking lot information B (step S504). In step S505, it is determined whether or not the display mark overlaps the display mark of the restriction information A (step S502). This process is repeated until the end of the second buffer is reached. If the parking lot information B is the tail end of the second buffer, it is determined whether the restriction information A is the tail end of the first buffer for the restriction information A (step S50).
6). If the regulation information A is not the last, the information one level lower in the first buffer is set as the regulation information A, and is compared with the parking lot information B in the second buffer (step S507). If the regulation information A is at the end, the process ends. According to such a flow, the controller 22 deletes the parking lot information overlapping with the display mark of the traffic regulation information from the second buffer.

Next, the parking lot information remaining in the second buffer is compared with each other, and rearranged in descending order of priority (step S405). Specifically, the priority order is based on the fullness ratio, the waiting time, the number of accommodated vehicles, the fee unit, the fee structure, and the like included in the parking lot information (see Table 1). Finally, a comparison process is performed on the rearranged parking lot information in the second buffer to determine whether or not the display marks overlap (step S406).

The comparison processing between the parking lot information will be described with reference to FIG. First, the controller 22 compares the parking information C with the parking information D assuming that the leading parking information in the second buffer is C and the next lower parking information is D (step S601). It is determined whether or not the display marks of C and the parking lot information D overlap when displayed on the display (step S602).

If it is determined that the display marks of the parking information C and the parking information D overlap, the parking information D is deleted from the second buffer (step S603). Next, it is determined whether or not the parking lot information D is the last one of the second buffer (step S604). If not, the next lower information of the parking lot information D is set as the parking lot information D. (Step S
606), it is determined whether or not this display mark overlaps with the display mark of the parking lot information C (step S606). If it is the last, the parking lot information C is stored in the third buffer (step S602). Further, it is determined whether or not the parking lot information remains in the second buffer (step S60).
7). If the information remains in the second buffer, the information at the head of the second buffer is set as the parking lot information C and a comparison process is performed (step S601). Repeat the above comparison process,
When the information in the second buffer is exhausted, the processing is terminated. According to the flow described above, the controller 22
From the parking lot information in the buffer, those whose display marks do not overlap each other are extracted in accordance with the priority order and stored in the third buffer.

After completion of the comparison processing between the parking lot information, the controller 22 reads the information other than the parking lot information from the RAM 22c.
The road traffic information to be drawn around the own vehicle position is read out and given to the display control unit 27 together with the parking lot information stored in the third buffer (step S407).
4 is superimposed and drawn on the road map (step S408).
According to the above flow, the controller 22 displays the traffic regulation information and the parking lot information on the display 34 so that the display marks do not overlap.

As described above, according to the on-vehicle navigation device in this embodiment, as shown in FIG. 7B, the parking lot display mark displayed on the display does not overlap the traffic regulation display mark. In addition, it is possible to prevent the regulation display mark from being hidden by the parking lot display mark. In addition, since the parking lot display marks are also displayed so that they do not overlap with each other in a high priority order such as an empty state, the user can easily select a parking lot. Therefore, it is possible to display traffic information with high visibility, and to provide a navigation device in which the user can easily obtain necessary information.

The present invention is not limited to the above embodiment, and various modifications are possible. In the above-described embodiment, among the display marks of the VICS information, the display selection is performed for the regulation information and the parking lot information mark. However, the same processing can be performed for other regulation information, VICS information, landmarks, and the like.

Regarding selection of display information, selection methods and display methods other than the above-described embodiment are possible. For example, in addition to the above-described priority of the parking lot information, the priority of the parking lots near the optimum route can be increased and selectively displayed.

Also, the navigation device of the present invention
The user may set all the display, non-display, and selection display of the road traffic information by using the map scale (FIG. 8). Compared to the conventional display and non-display of information set by the map scale, the user can specify the display of the information display mark by the map scale, so that there is no need to switch between the map screen and the information display screen. Further, as described above, since the information display can be selectively performed, the user can customize the information more finely.

In the embodiment described above, the user can set in advance all display and selection display. However, information display marks within a predetermined distance range from the own vehicle are selectively displayed, and display marks outside the information display mark are outside. Like full view,
The display may be automatically selected according to the movement of the vehicle.

In the above-described embodiment, a single-screen display is described. However, when a display capable of displaying two screens is used, one of the screens is selectively displayed.
The other screen can be displayed in full.

The navigation device according to the embodiment of the present invention can be realized by using a general computer system without using a dedicated system. For example,
The above processing is executed by installing the program for executing any of the above from a medium (floppy (registered trademark) disk, CD-ROM, or the like) into a computer having a GPS receiving function. A navigation device can be configured.

The method for supplying the program to the computer is arbitrary. For example, the information may be supplied via a communication line, a communication network, a communication system, or the like. As an example, a bulletin board (BB) of a communication network
The program is posted on S) and distributed via a network. And start this program, O
Under the control of S, the above-described processing can be executed by executing the application program in the same manner as other application programs.

[0055]

According to the present invention, it is possible to provide a navigation device capable of performing display with high visibility. With this navigation device, various types of information provided from the outside can be displayed in an easily viewable manner so as not to overlap. This makes it easier for users to get the information they need,
The convenience for the user is improved.

[Brief description of the drawings]

FIG. 1 shows a configuration of a system to which a vehicle-mounted navigation device according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing a configuration of a navigation device according to the embodiment of the present invention.

FIG. 3 shows a navigation device according to an embodiment of the present invention, on a display, a road map, a vehicle position, an optimal route,
6 is a flowchart illustrating the entire process of displaying road traffic information.

FIG. 4 is a flowchart illustrating a process for the navigation device according to the embodiment of the present invention to selectively display road traffic information, particularly parking lot information.

FIG. 5 is a flowchart showing comparison processing of traffic regulation information and parking lot information of the navigation device according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a comparison process between parking lot information of the navigation device according to the embodiment of the present invention.

FIG. 7A shows an example of a display screen of a conventional navigation device, and FIG. 7B shows an example of a display screen of a vehicle-mounted navigation device according to the present invention.

FIG. 8 is an example of a display setting screen of the in-vehicle navigation device of the present invention.

[Explanation of symbols]

 Reference Signs List 11 VICS center 12 Beacon 13 Traffic information receiving unit 21 Navigation device 22 Controller 22a CPU 22b ROM 22c RAM 23 Traffic information receiving unit 24 Position detecting unit 25 Input processing unit 26 Memory control unit 27 Display control unit 28 Voice output unit 29 GPS receiver Reference Signs List 30 direction sensor 31 vehicle speed sensor 32 input device 33 memory drive unit 34 display 35 speaker 36 antenna 37 memory 38 GPS antenna

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09B 29/10 G09B 29/10 A F term (Reference) 2C032 HB22 HB24 HC31 HD03 HD04 HD07 2F029 AA02 AB01 AB07 AC02 AC09 AC14 AC16 5H180 AA01 BB04 BB13 CC01 CC12 EE18 FF04 FF05 FF13 FF22 FF32

Claims (7)

[Claims] 1. An on-vehicle navigation device having a display screen, displaying map information including a position of a vehicle on the display screen, and performing route guidance as the vehicle progresses, wherein the map information is displayed. Storage means for storing road traffic information including information to be displayed as a display mark on the display screen, and a display mark on a display screen on which map information is displayed, based on the road traffic information stored in the storage means. Display control means for deleting lower-level information overlapping with higher-priority information when displaying the same, and displaying the higher-level information on the display screen. apparatus. 2. The apparatus according to claim 1, further comprising receiving means for receiving road traffic information from a center, wherein the road traffic information includes road traffic information from the center received by the receiving means. In-vehicle navigation device. 3. An in-vehicle navigation device having a display screen, displaying map information including the position of the vehicle on the display screen, and performing route guidance as the vehicle progresses, wherein the map information is displayed. Receiving means for receiving, from the center, road traffic information including information to be displayed as a display mark on the displayed display screen; storage means for storing the road traffic information received by the receiving means; A display control for deleting, from a road traffic information, information that is overlapped when displayed as a display mark on a display screen on which map information is displayed in accordance with a predetermined priority, and displaying the overlapped information on the display screen. And an on-vehicle navigation device, comprising: 4. An on-vehicle navigation device having a display screen, displaying map information including the position of the vehicle on the display screen, and performing route guidance as the vehicle progresses, wherein the map information is displayed. Receiving means for receiving from the center road traffic information including traffic regulation information and parking lot information to be displayed as a display mark on the display screen, and a first storage for storing the road traffic information received by the receiving means. Means, from the parking information stored in the first storage means,
First deletion means for deleting parking lot information overlapping with the traffic regulation information when displayed on the display screen as a display mark; and parking lot information overlapping with the traffic regulation information by the first deletion means. A second storage unit for storing the removed parking lot information, and from the parking lot information stored in the second storage unit, when displayed as a display mark on the display screen on which the map information is displayed, A second deletion unit that deletes lower-level information overlapping with the higher-order information, and the parking lot information stored in the second storage unit, the overlap of which is removed by the second deletion unit, And a display control means for displaying on the display screen together with the traffic regulation information stored in the first storage means. 5. A setting means, wherein the display control means is capable of setting display or non-display of a display mark of the information to be displayed on a display screen on which map information is displayed, according to a map scale. 2. The method according to claim 1, further comprising:
5. The in-vehicle navigation device according to any one of claims 4 to 4. 6. An information display method, comprising a display screen, wherein a map information including a position of the vehicle is displayed on the display screen of an on-vehicle navigation device that performs route guidance as the vehicle moves. Receiving from the center road traffic information including information to be displayed as a display mark on the display screen on which is displayed, and a display screen on which map information is displayed from the information received in the receiving step A display control step of deleting information overlapping when displayed as a display mark on the display screen according to a predetermined priority, and displaying the information with the overlap removed on the display screen. Display method. 7. A vehicle-mounted navigation device having a display screen for performing route guidance as the vehicle travels, for causing a computer to execute an information display method for displaying map information including the position of the vehicle on the display screen. Receiving from a center road traffic information including information to be displayed as a display mark on the display screen on which map information is displayed, wherein: A display that deletes information that is overlapped when the map information is displayed as a display mark on the display screen on which the map information is displayed, according to a predetermined priority order, and displays the information with the overlap removed on the display screen. A computer-readable recording program for causing a computer to execute the information display method, comprising: a control step; and Possible recording medium.