JPH1047980A - Navigation device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately recognize the operating state of a desired facility near a road by providing a road data storing means for storing maps containing roads, facilities near the roads, a present location calculating means for vehicle, and a map and present location displaying means. SOLUTION: A CD-ROM driver 16 reads out the map data corresponding to the map of a prescribed extent from the present location of its own vehicle previously calculated by means of a microprocessor 24 from a CD-ROM 15 under the control of the microprocessor 24. The map data contains facility data composed of the names, X-Y coordinates, facility guidances indicating the operating states of facilities. Then the microprocessor 24 calculates the present day, time, and the day of the week and gives the map data and the required data of each facility to a display processor 23 after judging whether the facility is in operation or a regular holiday. The processor 23 performs prescribed processing on the data and, finally, a list containing the names of the facilities, distances to the facilities from the present location, presence/ absence of parking lots, etc., is displayed on the screen of a display 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation device mounted on an automobile for displaying a road on which the automobile travels and its surroundings.

[0002]

2. Description of the Related Art Conventionally, a current position of a vehicle traveling on a road is calculated and displayed on a screen such as a liquid crystal display, and a guidance route which is a road on which the vehicle should travel toward a destination is calculated. Is known. In this system, the current position of the vehicle is calculated based on the traveling direction of the vehicle measured by a direction sensor such as a gyro and the traveling distance of the vehicle measured by a vehicle speed sensor or a distance sensor. In general, the distance is determined by measuring the number of revolutions of an output shaft of a transmission or the like, and multiplying the number of revolutions by a distance coefficient which is a distance traveled by the vehicle per revolution of the tire.

Further, in order to correct the error of the current position obtained from the obtained traveling direction and traveling distance of the vehicle, as described in Japanese Patent Application Laid-Open No. 63-148115, based on the traveling distance and the azimuth change amount, Obtain the error amount based on the estimated position of the determined vehicle and the error of the road map, register the estimated position as its own position corresponding to all roads located within the range of the error amount centered on the estimated position A technique is known in which a correlation coefficient of each of the registered estimated positions with respect to each road is calculated, and an estimated position associated with the correlation coefficient indicating that the error with respect to the road is the smallest is set as the current position. An image obtained by superimposing the mark (for example, an arrow) indicating the current position thus obtained and a map corresponding to the map data stored on the CD-ROM is displayed on the screen of the liquid crystal display.

[0004] In the on-vehicle navigation apparatus as described above, when the vehicle is traveling along a guidance route or an appropriate road, facilities located in the current position of the vehicle or in the traveling direction of the vehicle. A user may want to know the location of a restaurant (eg, a restaurant, a convenience store, a gas station, or a tourist spot). JP-A-6-250586 and JP-A-5-216404 disclose a technique in consideration of such a demand.

In Japanese Patent Application Laid-Open No. 6-250586, by switching a switch, a traveling direction of a vehicle, a traveling route, a route intersecting a traveling route, or a route in a direction indicated by a direction indicator are indicated. The characters or symbols on the map (for example, the display of the road name, the display of the town name, the display of the gas station, etc.) are selected from the symbol character information storage unit and read, and these characters or symbols are selected according to the selection of the switch. The symbols are displayed superimposed on the map.

In Japanese Patent Application Laid-Open No. 5-216404, a guide point (for example, a sightseeing spot) existing around a guidance route to a destination is searched from a CD-ROM, and is searched for on a map. The names are superimposed or displayed separately from the map.

[0007]

However, in the above-described technology, the user (driver) was able to grasp the name and location of the facility to some extent. The business situation of the facility, such as the presence or absence of a parking lot, could not be known. As a result, the facility could be reached, but the facility was not open,
There is a problem that the vehicle cannot be parked in some cases.

An object of the present invention is to provide an on-vehicle navigation device that allows a user to appropriately grasp the business situation of a desired facility located around a road.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a road,
A road data storage unit that stores data related to a map including facilities around the road; a current position calculation unit that calculates a current position of the vehicle; and a display unit that displays the map and the current position of the vehicle. An in-vehicle navigation device, comprising: business information acquisition means for obtaining a business situation related to a predetermined facility included in the map, wherein the display means is configured to display the facility and a related business situation. This is achieved by a vehicle-mounted navigation device characterized by the following.

[0010] According to the present invention, the business situation of a predetermined facility is displayed on the display means, so that the user can easily grasp this.

[0011] In a preferred embodiment of the present invention, there is further provided a facility symbol included in the map,
In accordance with the business situation obtained by the business situation acquisition means, there is provided a symbol creation means for creating a symbol at least a part of which is different, and the symbol created by the symbol creation means is displayed on a map by the display means. Is done.

According to this embodiment, the user can grasp the business situation of the facility based on the symbols on the map.

[0013] In a further preferred aspect of the present invention, there is further provided a table creating means for creating a table including a column including the facilities included in the map and the business status thereof, and the table created by the table creating means. A table is displayed by the display means.

[0014] In a further preferred aspect of the present invention, date and time acquiring means for obtaining the current date and time is further provided, and the business status includes the name of the facility, the business hours of the facility, and regular holidays of the facility. , Said business status acquisition means,
Based on the date and time obtained by the date and time obtaining means and the business situation, it is determined whether or not the facility is open.

According to this embodiment, the user can know whether the facility is open or not, and can easily determine the facility to be the destination based on this situation. Becomes

This business situation may include the presence or absence of a parking lot.

In a further preferred aspect of the present invention, the symbol creating means creates a symbol of which at least a part appears in a different color depending on whether or not the facility is open.

The business status may be stored in the road data storage means, or may be provided by a radio signal receiving device provided in the on-vehicle navigation device.

[0019] In a further preferred aspect of the present invention, the business status includes a type of facility, and the business information obtaining means is configured to obtain a business status regarding a facility of a specified type. .

[0020]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a configuration of a vehicle-mounted navigation device according to an embodiment of the present invention. As shown in FIG. 1, an on-vehicle navigation device 10 includes an angular velocity sensor 11 that detects a change in a traveling direction by detecting a yaw rate of a vehicle, and a direction sensor 12 that detects a traveling direction of a vehicle by detecting geomagnetism.
And a vehicle speed sensor 13 that outputs pulses at time intervals proportional to the rotation of the output shaft of the transmission of the vehicle.

Further, a display 17 for displaying a map around the current position, a mark indicating the current position, etc., and a switch 14 for receiving commands from the user (driver) for inputting information to be displayed on the display 17 and switching screens, etc. And a CD-ROM 15 storing digital map data in advance, and a driver 16 for reading map data from the CD-ROM 15. Further, a controller 18 for controlling the operation of each peripheral device described above is provided. In the present embodiment, the digital map data stored in the CD-ROM 15 includes road data composed of coordinates indicating the ends of a plurality of line segments, or road width data indicating the width of the road, Stores such as restaurants, convenience stores, gas stations, etc., located along the road, and names, locations (coordinates), and facility data of public facilities and the like showing business conditions are included.

The controller 18 includes an A / D converter 19 for converting a signal (analog) from the angular velocity sensor 11 into a digital signal, and an A / D converter 20 for converting a signal (analog) from the azimuth sensor 12 into a digital signal. , Vehicle speed sensor 13
A counter 26 for counting the number of pulses output from the PC every 0.1 second, a parallel I / O 21 for inputting the presence / absence of pressing of the switch 14, and a DMA (Direct) for transferring map data read from the CD-ROM 15. Memory Acces
s) It has a controller 22 and a display processor 23 for displaying a map image on the display 17.

The controller 18 further has a microprocessor 24 and a memory 25, and the display processor 23 has a graphic controller 27, a video memory 28, and a color palette 29.

The microprocessor 24 includes a signal of the angular velocity sensor 11 obtained through the A / D converter 19, a signal of the azimuth sensor 12 obtained through the A / D converter 20, and a counter 2.
6, the number of output pulses of the vehicle speed sensor 13 counted, whether or not the switch 14 input through the parallel I / O 21 has been pressed, and the CD-RO obtained through the DMA controller 22
It accepts the map data from M15, performs processing based on these signals, calculates the current position of the vehicle, and displays it on the display 17 via the display processor 23. The microprocessor 24 has a timer (not shown) therein so that the current date and time can be obtained by the timer.

The graphic controller 27 of the display processor 23 generates data for each pixel based on the map data and the current position of the vehicle, and temporarily stores the data in the video memory 28. Next, predetermined R, G, and B signals are generated by the color palette 29 based on the pixel data temporarily stored in the video memory 28 and the like, and these signals are given to the display 17.

As shown in FIG. 2, the current position of the vehicle is displayed by being superimposed on a map already displayed on the screen of the display 17 using an arrow mark. Thereby, the user can know the current position of the vehicle on the map. The memory 25 includes a ROM storing a program for defining the contents of processing (described later) for realizing such an operation, and a RAM used as a work area when the microprocessor 24 performs processing. I have.

Hereinafter, the operation of the on-vehicle navigation device 10 thus configured will be described. FIG. 3 is a flowchart schematically showing processing executed by the vehicle-mounted navigation device 10 according to the present embodiment. As shown in FIG. 3, these processes mainly include a step of calculating the traveling direction and the traveling distance of the vehicle (step 301) and a step of determining the current position of the vehicle from the calculated traveling direction and the distance (step 302). ), And a step of displaying the obtained vehicle position and direction on a map together with stores and the like located in the vicinity thereof (step 30).
3) can be divided into three.

First, the process of calculating the traveling direction and the traveling distance of the vehicle (step 301) and the process of determining the current position of the vehicle from these (step 302) will be described.

In step 301, the following processing is executed at regular intervals, for example, every 100 ms. First, the output value of the angular velocity sensor 11 is read via the A / D converter 19. . Since the azimuth change is output as the output value of the angular velocity sensor 11, only the relative value of the traveling direction of the vehicle can be detected. For this reason, the azimuth sensor 12 composed of a geomagnetic sensor is next passed through the A / D converter 20.
Is read, and the estimated azimuth of the vehicle is determined using the absolute azimuth calculated from the output value of the azimuth sensor 12 and the azimuth change (angular velocity output) output from the angular velocity sensor 11.

For example, when the vehicle speed is low for a long time, the error of the angular velocity sensor is large. Therefore, when the vehicle speed is low for a certain time or more, only the direction of the direction sensor is used. . Next, the counter 26 counts the number of pulses output by the vehicle speed sensor 13 every 0.1 seconds, and reads the counted value. By multiplying the read value by a distance coefficient, a distance advanced to a predetermined period is obtained.

Next, the traveling distance value per predetermined cycle thus obtained is integrated with the value obtained last time,
Check whether the traveling distance of the vehicle has reached a predetermined distance, and if less than the predetermined distance, terminate the processing,
Start a new process.

On the other hand, when the traveling distance of the vehicle has reached a predetermined distance, the traveling direction and the traveling distance R at that time are output, and further, the integrated distance is initialized to newly add the traveling distance. Start integration of.

Next, a virtual current position of the vehicle is calculated on the basis of the traveling direction and the traveling distance of the vehicle obtained in step 301, and based on the calculated virtual current position, the vehicle becomes a candidate for the current position of the vehicle. The process for obtaining candidate points will be described with reference to the flowchart in FIG.

The process in step 302 is executed when the vehicle has traveled a predetermined distance and in step 301 the traveling direction and travel distance of the vehicle have been obtained. Now,
In this process, first, the traveling azimuth and the traveling distance obtained in step 301 are read (step 401). Next, based on these values, the moving amount of the vehicle is separately obtained in the latitude and longitude directions. Further, the amount of movement in each of these directions is added to the position of the candidate point of the vehicle obtained in the previous process of obtaining the candidate point of the vehicle, and the virtual current position (the position where the current vehicle is estimated to exist) is added. A) is obtained (step 402). If, for example, immediately after starting the device,
If there is no candidate point obtained in the process of obtaining the candidate point of the previous vehicle, the virtual current position (A) is obtained by using a separately set position as the position of the previously obtained candidate point.

Next, a map around the obtained virtual current position (A) is read from the CD-ROM 15 into the driver 16 and the D
The data is read out via the MA controller 23, and road data (line segments) within a preset distance D around the virtual current position (A) is selected and taken out (step 403). In the present embodiment, a map included in an area corresponding to a square having a length L1 centered on the virtual current position (A) is read from the CD-ROM 15. As described above, in the present embodiment, as the road data, as shown in FIG.
Approximation is made by a plurality of line segments 51 to 56 connecting points, and the line segments are represented by the coordinates of the start point and the end point. For example, line segment 53 has its starting point (x
3, y3) and the end point (x4, y4).

Next, from the line segments extracted in step 403, only those line segments whose azimuths are within the predetermined direction and the required traveling direction are selected (step 40).
4) Further, with respect to all of the extracted n line segments, a perpendicular line is lowered from the virtual current position (A), and the perpendicular line L
The length of (n) is obtained (step 405).

Next, an error cost value ec (n) defined by the following equation is calculated for all the line segments extracted in step 404 based on the lengths of these perpendicular lines.

Ec (n) = α × | θcar−θ (n) | +
β | L (n) | where θcar is the vehicle direction at the virtual current position (A), θ (n) is the direction of the line segment, and L (n) is from the virtual current position (A) to the line segment. The distance of the perpendicular, α
And β are weighting factors. The values of these weighting factors are
The deviation between the traveling direction and the azimuth of the road, or the deviation between the current position and the road may be changed depending on whether the current position emphasizes the road above it. For example, when importance is attached to a road whose direction is close to the traveling direction, α is increased.

Here, the candidate points will be described. In an initial state such as immediately after the start of the device, the virtual current position (A) is uniquely determined by the user (driver) inputting predetermined information using the switch 14, and the like.
And this position exists on the line segment corresponding to the road. However, after the vehicle has traveled, the virtual current position (A) may no longer exist on the line segment corresponding to the road due to an error in a direction sensor such as a gyro. As a result, for example, as shown in FIG. 6, when the road is branched, that is, when two line segments 64 and 65 appear from the node 68 of the line segment 61 corresponding to the road, In many cases, it is not possible to clarify whether a vehicle exists on a road corresponding to.

Accordingly, in such a case, in this embodiment, predetermined points existing on two conceivable line segments are set as candidate points, and their current position, error cost, The calculation error cost and the like are each stored in a predetermined area of the RAM of the memory 25. For the sake of simplicity, in the following description, one or more new candidate points will be generated from a single candidate point, unless otherwise specified.

Next, the calculated error cost ec
According to (n) and the accumulated error cost es related to the candidate point calculated in the previous process, the accumulated error cost es (n) in the current process defined by the following equation is calculated ( Step 406).

Es (n) = (1−k) × es + k × ec (n) Here, k is a weight coefficient larger than 0 and smaller than 1. The accumulated error cost es (n) indicates how much the error cost calculated in the previous process is reflected in the error cost calculated in the current process. Further, based on the calculated accumulated error cost es (n), the reliability tr defined by the following equation is calculated.
st (n) is calculated (step 406).

Trst (n) = 100 / (1 + es (n)) As is clear from the above equation, the accumulated error cost ec
As (n) increases, the reliability trst
(N) decreases and approaches 0 (zero). On the other hand, as this becomes smaller, the reliability trst (n) increases, and its value approaches 100.

By performing such processing, n existing within a predetermined range D from the current position A for a certain candidate point
The reliability trst (n) associated with the line segments is determined. When there are a plurality of candidate points, the reliability trst (m, n) relating to n line segments existing within a predetermined range D from each candidate point Cm may be calculated.

Then, based on the calculated reliability trst (n), a point advanced from a certain candidate point by a length corresponding to the distance R traveled by the vehicle along a corresponding line segment is calculated as follows:
A new candidate point C (n) is set (step 407). Therefore, if the number of line segments that exist in a predetermined range D from the current position A for a certain candidate point and the difference between the azimuth and the vehicle azimuth is equal to or smaller than a predetermined value is n, n A new candidate point C (n) will be generated.

Further, these new candidate points C (n) are sorted according to the value of the reliability trst (n) corresponding to each of the new candidate points C (n) (step 408).
The candidate point C (i) having the highest reliability value is set as a display candidate point CD, that is, as a candidate point to be displayed on the display 17, and its position, accumulated error cost, reliability, and the like are stored in the memory 25. In addition to storing the information in a predetermined area of the RAM, the positions of the candidate points other than the display candidate points, the accumulated error cost, the reliability, and the like are also stored in the predetermined area of the RAM (step 409).

For example, as shown in FIG. 6, suppose that the current position A is represented by the position indicated by the point 63 with respect to a certain candidate point 62 existing on the line segment 61. In such a case, the line segments 64, 6 that are present in the predetermined range D from the current position A and whose difference between the azimuth and the vehicle azimuth is equal to or less than a predetermined value.
5, the distances L (1) and L (2) from the current position A to the line segments 64 and 65 are calculated, and the calculated distances and angles θ (1) and θ ( 2) and related error costs based on the vehicle orientation θcar, etc.
Calculate the accumulated error cost and reliability. Further, based on the traveling distance R of the vehicle obtained in step 405 of FIG. 3, a length corresponding to the traveling distance R from a certain candidate point 62 along the line segments 61 and 64 or the line segments 61 and 65. Is calculated, and points corresponding to this position are set as candidate points 66 and 67, respectively. Of the candidate points 66 and 67 obtained in this way, the reliability trs
The one with a large value of t is a display candidate point.

After the display candidate points are obtained in this manner, an image in which an arrow is superimposed on the map corresponding to the map data is displayed on the screen of the display 17 (FIG. 3). Step 303).

Next, the processing of step 303 will be described in more detail. FIG. 7 is a flowchart showing a process for displaying an image on a screen strip of a display of a vehicle-mounted navigation device according to the present embodiment. In this embodiment, various images can be displayed on the screen of the display 17 by operating a predetermined switch 14 (see FIG. 1).

First, the map data corresponding to a map within a predetermined range from the current position (display candidate point) of the vehicle obtained in step 302 of FIG.
Under the control of the CD-ROM driver 16
The data is read from M15 (step 700). The map data includes facility data including a set of data such as a facility name, x and y coordinates, and facility guidance indicating the business status of the facility.

Next, the microprocessor 24 sequentially extracts a set of data relating to each facility from the read map data. More specifically, first, it is determined whether or not all facilities included in the area corresponding to the read map data have been extracted (step 70).
1). If the determination in step 701 is yes (Yes), the process proceeds to step 707, whereas if the determination is no (No), the process proceeds to step 702.

In step 702, data related to facility guidance is referred to from among the extracted data set related to a certain facility. FIG. 8 is a diagram illustrating a data set related to a certain facility. As shown in FIG. 8, this data set 800 includes facility kanji data 801 indicating the name of the facility in kanji, x coordinate data 802 indicating the x coordinate of the facility, and y coordinate data indicating the y coordinate of the facility. 803 and guidance data 804 relating to facility guidance. The guidance data 804 includes data indicating types of facilities, more detailed classifications than types, presence / absence of parking lots, business hours, and regular holidays (see reference numerals 805 to 809). Therefore, the microprocessor 2
4 refers to the guidance data 804 from the data set shown in FIG.

Next, the microprocessor 24 calculates the current date and time by referring to a timer (not shown) provided therein, and obtains the current day of the week based on the calculated date (step 703). . Thereafter, it is determined whether or not the obtained date and time falls within the business hours indicated in the guidance data 804, and the obtained day of the week matches the regular holiday indicated in the guidance data 804. Determine if there is. That is, on the obtained current day of the week, date and time,
It is determined whether the facility is open (step 70).
4).

In this step 704, the answer of yes (Ye
If determined to be s), a flag indicating that the facility should be lit is turned on when displaying on the screen of the display 17 (step 705), and thereafter, the process returns to step 701. On the other hand, when it is determined to be No in Step 704, the flag indicating that the facility should be lit is turned off when displaying on the screen of the display 17 (Step 706). Return to step 701.

As described above, steps 701 to 706
Is repeated, it is possible to execute processing for all facilities included in the map to be displayed on the display. When such processing is completed (step 70)
1 (Yes), the microprocessor 24 provides the display processor 23 with the map data and the data on the flag turned on or off for each facility.
In the display processor 23, based on the map data,
Data for each pixel is generated, and the R signal, G signal, and B signal obtained based on the data are output to the display 17 (step 707).

In step 707, when the flag related to a certain facility to be displayed is ON, the microprocessor 24, as shown in FIG. 9A, sets the portion corresponding to the window of the symbol 901 indicating the facility. 902, 9
Display processor 23 so that 03 is displayed in yellow.
Give instructions. On the other hand, when the flag related to a certain facility is off, the microprocessor 24
As shown in FIG. 9B, the display processor 23 is instructed to display the parts 905, 906, etc. corresponding to the windows of the symbols 904 indicating the facilities in black.

As a result, an image including the current positions of facilities, roads and vehicles is displayed on the screen of the display 702. In FIG. 10, which is an example of an image displayed on the screen of the display 17, the symbol shown in FIG. 9A or 9B is displayed at the location of the facility depending on whether the facility is open during business hours. Is displayed. On screen 1000 in FIG. 10, symbols 1002 to 1006 indicating facilities are displayed in addition to arrow 1001 indicating the current position of the vehicle. Symbol 1002 and symbol 1006
It can be understood that the facility corresponding to is not open, while the facility corresponding to the symbols 1003 to 1005 is open. As described above, some of the symbols are displayed in different colors depending on whether or not the facility is open during business hours, so that the user can easily grasp whether or not the facility is open. It becomes possible.

When the processing in step 707 ends, the table creation processing in step 708 is executed. Here, FIG.
9 is a flowchart showing a table creation process. As shown in FIG. 11, in this process, first, it is determined whether or not there is an instruction to display a list by the operator turning on a predetermined switch 14 (step 1101). If it is determined in this step 1101 that the answer is no (No), the process ends. If it is determined that the answer is yes (Yes), the process proceeds to step 1102. Step 1102
In, it is determined whether the processing for all facilities displayed on the screen of the display 17 has been completed (step 1102). No in step 1102
If it is determined (No), the distance between a certain facility and the current position is calculated (step 1103). More specifically, based on the x-coordinate and y-coordinate in the data set relating to the facility and the x-coordinate and y-coordinate of the current position, the distance between them is calculated. When step 1103 is completed, step 11
Return to 02.

When the distances between all the facilities displayed on the screen of the display 17 and the current position are calculated in this way (Yes in step 1101), a table creation process is executed (step 1101). 1104).

In this process, columns including the name of the facility, the distance from the current position, and the presence or absence of a parking lot are sequentially created with reference to the data related to the facility in ascending order of the distance from the current position. Table data indicating a table including such a column is sent from the microprocessor 24 to the display processor 23.
Given to. Further, according to the flag obtained in step 704 of FIG. 7, when the flag related to a certain facility is turned on, the microprocessor displays the column corresponding to this facility as usual. When the flag related to a certain facility is turned off, the instruction is given to the display processor 23 so that the column corresponding to this facility is displayed in an inverted manner.

FIG. 12 shows an image including the table thus obtained. As shown in FIG. 12, a table including columns 1202 to 1206 indicating the name of the facility, the distance from the current position, and the presence or absence of a parking lot is displayed on the right portion 1201 of the screen 1200 of the display 17. I have.

In FIG. 12, the distance from the current position of the vehicle is smaller in the facility shown in the upper column. Also, in FIG. 12, the facilities shown in the columns 1202 and 1206 are highlighted, so that it can be understood that the facilities are not operating. On the other hand, column 1203
The facilities indicated by reference numerals 1205 to 1205 are displayed normally, and it can be understood that these facilities are open. In columns 1202 to 1205, a “P” mark indicating that a parking lot is provided in the corresponding facility is added.

As described above, according to the present embodiment, a part of the symbol indicating the facility on the map displayed on the screen of the display differs depending on whether or not the facility is open. Since the information is displayed, the user can easily determine whether the facility is open or not, and can easily and appropriately determine the facility to which the user is to be directed.

According to the present embodiment, at least a part of the screen of the display includes the name of the facility, the distance from the current position, and the presence or absence of the parking lot. Are obtained in ascending order, and columns related to facilities that are not operating are highlighted in this table. For this reason, the user can easily select a desired facility.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, this is done.

For example, in the above embodiment, the vehicle is measured by the angular velocity sensor and the geomagnetic sensor, the traveling distance of the vehicle is measured by the vehicle speed sensor, and the current position of the vehicle is obtained based on these. However, the present invention is not limited to this.
(sitioning System) receiver, and may be configured to obtain the current position of the vehicle based on radio waves from satellites.

In the above embodiment, the date and time obtained by the timer provided in the microprocessor 24 are used, but the present invention is not limited to this. As described above, an in-vehicle navigation device including a GPS receiver and configured to measure a current position of a vehicle based on a radio wave from a satellite obtains a current date and time based on a radio wave from a satellite. Is also good.

Furthermore, in the above-described embodiment, the business status of all facilities present on the map displayed on the screen of the display 17 is displayed, but the present invention is not limited to this. For example, the user may operate a switch to specify a desired facility type and display the business status of facilities included in the type. In this case, the guide data 8 in the data set related to the facility shown in FIG.
The data indicating the type in 04 and the data designated by the user may be compared, and the process may be performed on the data that matches.

Further, in the above embodiment, the guidance data 804 relating to the business status of the facility is stored in the CD-RO.
M is stored in advance in M, but is not limited to this. For example, guidance data may be received from the outside by data communication, and based on the guidance data, the operating status of the facility may be displayed on a display screen. With this configuration, even when the business status of a facility (business hours, regular holidays, etc.) changes, the business status of the facility can be appropriately displayed on the display screen based on the latest information. Becomes possible.

In the above embodiment, the portion corresponding to the facility symbol window may be displayed in yellow or black, or the columns in the table may be displayed normally or reversed. Indicates whether or not the facility is open, but the present invention is not limited to this, and it may be displayed in a map whether or not the facility is open, or the designated facility may be displayed. May be guided by voice.

In this specification, means does not necessarily mean physical means, but also includes a case where the function of each means is realized by software.
Further, the function of one means or member may be realized by two or more physical means or members, or the function of two or more means or members may be realized by one means or member.

[0073]

According to the present invention, it is possible to provide an in-vehicle navigation device that allows a user to appropriately grasp the business situation of a desired facility located around a road.

[Brief description of the 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 diagram illustrating a display example of a map and a current position according to the embodiment;

FIG. 3 is a flowchart schematically showing processing executed by the on-vehicle navigation device according to the embodiment;

FIG. 4 is a flowchart illustrating a process of calculating a current position of the vehicle according to the embodiment;

FIG. 5 is a diagram for explaining map data according to the embodiment;

FIG. 6 is a diagram for explaining a line segment corresponding to a road, a virtual current position, and a candidate point;

FIG. 7 is a flowchart illustrating a process for displaying an image on a display of the vehicle-mounted navigation device according to the present embodiment;

FIG. 8 is a diagram illustrating a data set related to a certain facility.

FIG. 9 is a diagram for explaining facility symbols to be displayed on a screen according to the present embodiment.

FIG. 10 is a diagram illustrating an example of an image displayed on the screen of the display according to the embodiment;

FIG. 11 is a flowchart illustrating a table creation process according to the embodiment;

FIG. 12 is a diagram illustrating another example of an image displayed on the screen of the display according to the present embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 On-vehicle navigation device 11 Angular velocity sensor 12 Geomagnetic sensor 13 Vehicle speed sensor 14 Switch 15 CD-ROM 16 CD-ROM reading driver 17 Display 18 Controller

Claims (9)

[Claims] 1. A road data storage means for storing data relating to a map including a road, facilities around the road, etc .; a current position calculation means for calculating a current position of the vehicle; and the map and the current position of the vehicle. A vehicle-mounted navigation device, comprising: a sales information obtaining unit that obtains a business status relating to a predetermined facility included in the map, wherein the display unit displays the facility and a related business status. An in-vehicle navigation device characterized in that: 2. The apparatus according to claim 1, further comprising: symbol creation means for creating a symbol of the facility included in the map, the symbol having at least a part different according to a business situation obtained by the business situation acquisition means. The in-vehicle navigation device according to claim 1, wherein the symbols created by the symbol creating means are displayed on the map by the display means. 3. A facility included in the map,
3. The vehicle-mounted vehicle according to claim 1, further comprising table creation means for creating a table including a column including the business status, wherein the table obtained by the table creation means is displayed by the display means. Navigation device. 4. The system according to claim 1, further comprising a date and time obtaining unit for obtaining a current date and time, wherein the business status includes a facility name, a business hours of the facility, and a regular holiday of the facility. The in-vehicle navigation according to any one of claims 1 to 3, wherein it is determined whether or not the facility is open based on the date and time obtained by the date and time acquisition unit and the business situation. apparatus. 5. The on-vehicle navigation device according to claim 1, wherein the business status includes the presence or absence of a parking lot. 6. The symbol producing means according to claim 4, wherein said symbol producing means produces a symbol of which at least a part is displayed in a different color according to whether or not the facility is open. In-vehicle navigation device. 7. The in-vehicle navigation device according to claim 1, wherein the business status is stored in road data storage means. 8. A wireless signal receiving apparatus for receiving an external wireless signal, wherein the business status is given to the wireless signal receiving apparatus by a wireless signal. The vehicle-mounted navigation device according to any one of claims 1 to 6. 9. The business status according to claim 1, wherein the business status includes a type of the facility, and the business information obtaining unit obtains a business status regarding the facility of the designated type. An in-vehicle navigation device according to the item.