JP2000003498A - Travel position display device - Google Patents

Abstract

(57) [Summary] [Problem] To display a current position and a destination at the same time, automatically display a divided screen of an optimal scale. When a user selects a two-screen display mode and selects a self-vehicle position / destination automatic display mode,
The screen dividing means 106 divides the display screen of the display means 104 into two parts, and the scale determining means 107 determines the scale at which the own vehicle position and the destination can be displayed in the most detailed simultaneous manner on the divided screen. 108 reads out the determined scale map from the map data storage means 103 and displays it on the display means 104. If the user selects the vehicle position / destination selection display mode, the scale selection means 10
Since the image is displayed at the scale designated by the user according to 9, the own vehicle position and the destination can be simultaneously displayed according to the user's preference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling position display device capable of displaying two screens in a vehicle-mounted navigation device.

[0002]

2. Description of the Related Art FIG. 4 is a schematic block diagram of a conventional on-vehicle navigation device. In FIG. 4, reference numeral 1 denotes a direction sensor, which uses an optical gyro for detecting a relative running direction of an automobile. Reference numeral 2 denotes a distance sensor that generates a pulse corresponding to the number of rotations of the wheels. Reference numeral 3 denotes various sensor signals such as an ON / OFF signal of a brake switch, a parking switch, and the like, and a power supply voltage monitoring signal. Reference numeral 4 denotes a sensor signal processing unit that processes sensor signals such as an azimuth sensor 1, a distance sensor 2, and various sensor signals 3, and 5 denotes a GPS (Global Positioning System).
m) A receiver that receives and calculates radio waves transmitted from a plurality of satellites to obtain the position (latitude and longitude) of a reception point. Reference numeral 6 denotes a CD-ROM drive which reads map data from a CD-ROM 7 on which map data is recorded. Reference numeral 8 denotes a display / operation unit installed in the vehicle interior,
It has a liquid crystal display 8A for displaying a map and the current running position, direction, etc. of the car, and a touch panel 8B disposed on the front of the liquid crystal display 8A. A switch for instructing a search, a switch for selecting a destination from the place names displayed on the liquid crystal display 8A, and the like are provided. Reference numeral 9 denotes an apparatus main body, which is arranged in a trunk room or the like.

In the apparatus main body 9, reference numeral 10 denotes a CPU (central processing unit) for performing various operations, reference numeral 11 denotes a ROM which is a read-only or one-time rewritable memory storing various arithmetic programs to be executed by the CPU 10, and 12 Is azimuth sensor 1, distance sensor 2, various sensor signals 3, GPS
The DRAM 13, which is a rewritable memory for storing data from the receiver 5, the CD-ROM drive 6, etc., and the calculation results of the CPU 10, etc., stores necessary data even when the power supply to the apparatus main body 9 is stopped. SRAM 14 is a backup memory for storing the characters, and 14 is a kanji / font RO which is a read-only memory for storing patterns of characters and symbols displayed on the liquid crystal display 8A.
M and 15 are image processors for forming a display image based on map data, current position data of the own vehicle, etc., 16
VRAM 17 is an image memory for synthesizing map data and current position data output from the CPU 10 and kanji and fonts such as town names and road names output from the kanji / font ROM 14 and displaying them on the liquid crystal display 8A.
Is an RGB conversion circuit for converting the output data of the VRAM 16 into a color signal and outputting it to the liquid crystal display 8A;
Is a communication interface for controlling communication between the apparatus main body 9 and the display / operation unit 8, CD-ROM drive 6, and GPS receiver 5.

FIG. 5 shows a format of map data stored in the CD-ROM 7, reference numeral 20 denotes a disk label, reference numeral 21 denotes a drawing parameter, reference numeral 22 denotes figure leaf management information.
Reference numerals 3 and 24 denote maps, which store background data, character data, road data, and the like, and store data for each unit map obtained by dividing a topographic map of the whole of Japan by latitude and longitude. I have. In addition, the map is set from a map (level 0) in which a narrow area is described finely to a map (level 2) in which a wide area is roughly described. Each figure is composed of view sets A, B, and C that describe the same area. In view sets A, B, and C, B is more detailed than A and C is more detailed than B. Each of the view sets A, B, and C is composed of view set management information and a plurality of units. Each unit describes a divided region obtained by dividing the region of each view set into a plurality. , A character layer, a background layer, a road layer, an option layer, and the like. In the character layer, place names, road names, facility names, and the like displayed on the map are recorded. In the background layer, data for drawing roads, facilities, and the like are recorded. In the road layer, FIG. As shown, data on coordinate points (nodes) and lines (links) describing roads including intersections, for example, node numbers of nodes, latitude and longitude, link numbers of links, link distances, and the like are recorded. In FIG. 6, white circles (印) indicate nodes, lines between nodes indicate links,
Black circles (●) indicate intersection nodes. The data recorded in the road layer is not directly involved in the map display, but is used as road network information for map matching.

[0005] Next, the operation of the vehicle-mounted navigation device configured as described above will be described. In FIG. 4, the output of the direction sensor 1 and the output of the distance sensor 2 are:
When sent to the CPU 10 via the sensor processing unit 4, the CP
In U10, the current position of the own vehicle is calculated, the latitude and longitude of the current position are obtained, and the GPS receiver 5 is operated.
The current position is corrected based on the data from. The map data of the unit corresponding to the current position obtained in this manner is stored in a CD-R drive by the CD-ROM drive 6.
The map data is read from the OM 7 and stored in the DRAM 12 via the communication interface 18. DRA
A part of the map data stored in M12 is read by the CPU 10, converted into image data by the image processor 15, and written into the VRAM 16. VRAM
The image data stored in 16 is converted into color signals by an RGB conversion circuit 17 and sent to the liquid crystal display 8A, where a map of a predetermined range including the current position is displayed. Also DRA
If the map data read from M12 includes character codes and symbol codes, patterns corresponding to these character codes and symbol codes are stored in the kanji / font ROM14.
And is displayed together with the map on the liquid crystal display 8A. In addition, the liquid crystal display 8A is based on a traveling speed and a traveling azimuth sequentially obtained as the vehicle travels.
Is sequentially changed.

Next, a two-screen map display on the liquid crystal display 8A of the navigation device will be described with reference to FIG. Liquid crystal display 8 as described above
When the user selects the two-screen display in the state where the vehicle position and the route to the destination are displayed together with the map on A (step S1), the CPU 10 instructs the image processor 15 to perform the left and right two-screen split display. Instruct. Next, when the user selects the display scale of the left screen (step S2), the selected map data of the left screen is displayed on the CD-R.
Read from the OM 7 to the DRAM 12 (step S
3) The map data is displayed on the left half of the liquid crystal display 8A by the image processor 15 (step S).
4). Similarly, when the user selects the display scale of the right screen (step S5), the selected scale map data of the right screen is read from the CD-ROM 7 into the DRAM 12 (step S6), and the map data is stored in the liquid crystal display 8A. It is displayed on the right half (step S7). Next, D
Road network data is taken into the CPU 10 from the map data read by the RAM 12, and the position and orientation of the vehicle on the road network are determined from the road network data and the current position information of the vehicle calculated by the CPU 10. (Step S9), liquid crystal display 8
The own vehicle mark and its direction are displayed on the map of A (step S10). On the other hand, when the two-screen display is not performed, when the user selects another display scale (step S11),
The scale map data of the selected screen is read from the CD-ROM 7 into the DRAM 12 (step S12), and the map data is displayed as one screen on the liquid crystal display 8A by the image processor 15 (step S13).

As described above, also in the traveling position display device in the above-mentioned conventional vehicle-mounted navigation device, the display screen can be divided and two-screen display can be performed.
By displaying a detailed map on the left and a wide-area map on the right as shown in, you can check the current location on the detailed map and check the route to the destination on the wide-area map. it can.

[0008]

However, in the above-described conventional traveling position display device, when performing two-screen display,
The user must select the scale of the map data to be displayed. For example, if the user wants to simultaneously display the current location and the destination on the right screen, the user must operate the map many times until an appropriate scale map is obtained. There was a problem.

The present invention solves the above-mentioned conventional problem. When the present location and the destination are desired to be displayed at the same time,
It is an object of the present invention to provide a travel position display device capable of automatically selecting and displaying an optimal scale map.

[0010]

In order to achieve the above object, the present invention provides a scale determining means for determining a scale at which a current position and a destination can be simultaneously displayed, and a display scale based on the determined scale. It is provided with a scale automatic changing means for automatically changing, so that the user can operate the divided screen of the optimum scale for simultaneous display of the current position and the destination without one operation of the user once. Can be displayed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention comprises a current position calculating means for calculating a current position of a vehicle, a route searching means for searching for a route to a set destination, and
Map data storage means for storing map data; display means for displaying the determined current position and the route to the destination on the map read from the map data storage means; and a display screen on the display means. Screen dividing means for dividing, scale determining means for determining a scale at which the current position and the destination can be simultaneously displayed on one of the divided screens, and automatically reducing the scale of one of the screens based on the determined scale. A travel position display device provided with an automatic scale changing means for changing the scale, which has an effect that a split screen of a scale optimal for simultaneously displaying a current position and a destination can be displayed by a single operation.

According to a second aspect of the present invention, there is provided the travel position display device according to the first aspect, further comprising means for arbitrarily selecting a scale at which the current position and the destination can be simultaneously displayed. Has an effect that a split screen of a reduced scale other than the split screen of the optimum scale for simultaneous display of the current position and the destination can be selected.

The invention according to claim 3 of the present invention is provided with means for selecting a mode for automatically changing the scale at which the current position and the destination can be displayed simultaneously and a mode for arbitrarily selecting the scale. The traveling position display device has an effect that a user can arbitrarily set whether to automatically change or arbitrarily select a display scale.

[0014] In the invention according to claim 4 of the present invention, the scale determining means calculates a linear distance from the current position to the destination, and can simultaneously display the current position and the destination based on the calculated distance. The travel position display device according to any one of claims 1 to 3, which determines a scale, and has an effect that calculation up to the determination can be performed at high speed.

According to a fifth aspect of the present invention, the travel position display device according to the fourth aspect selects a scale capable of always displaying the most detailed map among scales capable of simultaneously displaying the current position and the destination. By displaying the most detailed map that displays the current location and the destination at the same time, it is possible to provide a lot of information to the user.

In the invention according to claim 6 of the present invention, the position of the vehicle is displayed at the bottom of the center of the screen regardless of the direction of the vehicle,
The travel position display device according to claim 5, wherein the destination is displayed at an uppermost portion in the center of the screen, and has an effect that an easy-to-view map can be displayed.

According to a seventh aspect of the present invention, the position of the vehicle is displayed at the bottom left or right of the screen irrespective of the direction of the vehicle, and the destination is displayed at the top right or left of the screen. The travel position display device according to claim 5, wherein
This has the effect that the most detailed map can be displayed in an easily viewable manner.

According to an eighth aspect of the present invention, a map including the position of the vehicle is displayed on one screen displayed on the display means, and the position of the vehicle and the destination are simultaneously displayed on the other screen. The traveling position display device according to any one of claims 1 to 7, wherein the traveling position display device according to any one of claims 1 to 7, wherein a current traveling location can be confirmed on a detailed map, and the route to the destination and the position of the own vehicle are located in the route. Can be confirmed on a wide area map.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment) FIG. 1 is a schematic block diagram of a traveling position display device according to an embodiment of the present invention. In FIG.
101 is a current position calculating means for calculating the current position of the vehicle,
102 is a route search means for searching for a route to a set destination, 103 is a map data storage means for storing map data, and 104 is a readout of the determined current position and a route to the destination from the map data storage means 103. Display means 105 for superimposing and displaying on the map, operation input means 105 for instructing various commands, 106 a screen dividing means for dividing the display screen of the display means 104 into two, and 107 simultaneously displaying the current position and the destination. Scale determining means for determining a possible scale; automatic scale changing means for automatically changing to a display scale determined by the scale determining means 107; scale selecting means 109 for a user to arbitrarily select a display scale;
Reference numeral 0 denotes control means for controlling the entire apparatus.

Next, the operation of the traveling position display device configured as described above will be described with reference to the flowcharts of FIGS. The latitude, longitude and azimuth of the current position are obtained by the current position calculation means 101, and the route search means 1
When the route from the current position to the destination is calculated in step 02, the control unit 110 reads out the corresponding map data from the data from the map data storage unit 103,
It is displayed on the display means 104. In this state, if there is a request for two-screen display from the operation input unit 105 (step S1)
01), the control unit 110 transmits the request to the screen division unit 10
6 and prompt the user to select a display scale of the left screen via the display means 104. When the user selects the display scale on the left screen by the scale selection means 109 (step S102), the control means 110 causes the map data storage means 1
The corresponding scaled map data of the left screen is read from the CD-ROM 03 (step S103), and the map data is displayed on the left screen of the display means 104 (step S10).
4). Next, the control means 110 checks whether or not the automatic display mode of the own vehicle position and the destination is set (step S105). If the automatic display mode is not set, the control unit 110 displays the own vehicle position and the destination in the normal selection display mode. It is checked whether or not the simultaneous display is selected (step S106). If the simultaneous display is selected, the scale determining means 107 is activated as in the case of the automatic display mode. The scale determining means 107 calculates a straight-line distance between the own vehicle position calculated by the current position calculating means 101 and the set destination (step S107), and sets the own vehicle position at the bottom center of the screen and the destination. The most detailed scale that can be displayed in the state of being arranged at the top center of the screen is determined (step S108). Next, the scale automatic change means 109
The determined scale is selected as the display scale of the right screen (step S109), the selected scale map data of the right screen is read from the CD-ROM of the map data storage means 103 (step S110), and the map data is displayed. 10
4 is displayed on the right screen (step S111). Next, C
The road network data is fetched from the map data read from the D-ROM (step S112). Based on the road network data and the current position information of the own vehicle calculated by the current position calculating means 101, the own vehicle on the road network is determined. The position and orientation are determined (step S113),
The own vehicle mark and its direction are displayed on the map displayed on the right screen of the display means 104 as shown in FIG. 3 (step S1).
14). In the case where the simultaneous display of the own vehicle position and the destination is not selected in the normal selection display mode in step S106, the operation is an arbitrary operation by the user, and step S109 is performed.
After the user selects the display scale in step S110, steps after step S110 are performed.

On the other hand, when the two-screen display is not performed in step S101, when the user selects another display scale by the scale selection means 109 (step S115), the scale map data of the selected screen is stored in the map data storage means 103. (Step S116), and the map data is displayed as one screen on the display device 104 (step S117).

As described above, according to the present embodiment, when the user selects the two-screen display mode and selects the own vehicle position / destination automatic display mode, the screen dividing means 10
6 divides the display screen of the display means 104 into two,
The scale determining means 107 determines the scale at which the own vehicle position and the destination can be displayed simultaneously in the most detailed manner on the divided screen, and the automatic scale changing means 108 reads out the determined scale map from the map data storage means 103. It is displayed on the display unit 104, and when the user selects the own vehicle position / destination selection display mode, the display is performed at the scale designated by the user by the scale selection unit 109. It is possible to simultaneously display the own vehicle position and the destination.

In the above embodiment, the position of the host vehicle is displayed at the bottom of the center of the screen regardless of the direction of the host vehicle, and the destination is displayed at the top of the center of the screen. Is displayed at the bottom of the screen left or right regardless of the direction of the vehicle, and the destination is displayed on the diagonal line at the top of the screen right or left, so that the most detailed vehicle position and destination can be displayed simultaneously It can be performed.

[0024]

According to the present invention, as is apparent from the above embodiment, the scale determining means for determining the scale at which the current position and the destination can be displayed simultaneously, and the display scale is automatically changed based on the determined scale. It is equipped with a scale automatic change unit that displays the current scale and the destination at the same time without having to operate the user many times. can do.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a traveling position display device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a two-screen display operation in the embodiment of the present invention.

FIG. 3 is a screen diagram showing a two-screen display example according to the embodiment of the present invention;

FIG. 4 is a block diagram showing a configuration of a vehicle-mounted navigation device in a conventional example.

FIG. 5 is a format diagram of map data stored in a CD-ROM.

FIG. 6 is a schematic diagram showing road network data in map data.

FIG. 7 is a flowchart showing a two-screen display operation in a conventional example.

FIG. 8 is a screen diagram showing a two-screen display example in a conventional example.

[Explanation of symbols]

 Reference Signs List 101 Current position calculating means 102 Route searching means 103 Map data storing means 104 Display means 105 Control means 106 Screen dividing means 107 Scale determining means 108 Automatic scale changing means 109 Operation input means

Claims (8)

[Claims] 1. A current position calculating means for calculating a current position of a vehicle; a route searching means for searching for a route to a set destination; a map data storing means for storing map data; Display means for superimposing and displaying a route to a destination on the map read from the map data storage means, screen dividing means for dividing a display screen of the display means into two parts, and a current position on one of the divided screens A travel position display device comprising: scale determining means for determining a scale at which the image and the destination can be displayed simultaneously; and automatic scale changing means for automatically changing the scale of one of the divided screens based on the determined scale. 2. The travel position display device according to claim 1, further comprising means for arbitrarily selecting a scale at which the current position and the destination can be simultaneously displayed. 3. The travel position display device according to claim 2, further comprising means for selecting a mode for automatically changing the scale at which the current position and the destination can be simultaneously displayed and a mode for arbitrarily selecting the scale. 4. The scale determining means calculates a linear distance from a current position to a destination, and determines a scale at which the current position and the destination can be displayed simultaneously based on the calculated distance. The traveling position display device according to any one of the above. 5. The travel position display device according to claim 4, wherein a scale capable of always displaying the most detailed map is selected from scales capable of simultaneously displaying the current position and the destination. 6. The travel position display device according to claim 5, wherein the position of the vehicle is displayed at the bottom of the center of the screen regardless of the direction of the vehicle, and the destination is displayed at the top of the center of the screen. . 7. The vehicle according to claim 5, wherein the position of the vehicle is displayed at the bottom of the left or right of the screen regardless of the direction of the vehicle, and the destination is displayed at the top of the right or left of the screen. Travel position display device. 8. The display according to claim 1, wherein a map including the position of the vehicle is displayed on one screen displayed on the display means, and the position of the vehicle and the destination are simultaneously displayed on the other screen. 3. The travel position display device according to claim 1.