JP3008753B2 - Travel position display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a travel position display device for displaying the current position of a car or the like on a display device together with a map.

[0002]

2. Description of the Related Art FIG. 6 shows an outline of a conventional vehicle-mounted traveling position display device. In FIG. 6, reference numeral 61 denotes a direction sensor. The direction sensor 61 uses a geomagnetic sensor for detecting the absolute running direction of the vehicle and an optical gyro for detecting the relative running direction of the vehicle. Reference numeral 62 denotes a distance sensor that generates a pulse corresponding to the number of rotations of the wheels, and 63 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 64 denotes a sensor signal processing unit for processing sensor signals of the azimuth sensor 61 and the distance sensor 62, and 65 denotes a GPS (Global Posit
The GPS receiver 65 is capable of obtaining the position (latitude and longitude) of a receiving point by receiving and calculating radio waves transmitted from a plurality of satellites. Reference numeral 66 denotes a CD-ROM drive. The CD-ROM drive 66 reads map data from a CD-ROM 67 on which map data is recorded. Reference numeral 68 denotes a display / operation unit installed in the vehicle interior. The display / operation unit 68 includes a liquid crystal display 68A that displays a map, a current traveling position, a direction, and the like of the automobile.
The touch panel 68B includes a touch panel 68B provided on the front of the liquid crystal display 68A. The touch panel 68B has a switch for instructing enlargement or reduction of the display map, a switch for instructing a route search, and a place name displayed on the liquid crystal display 68A. A switch for selecting a destination from the inside is provided. Reference numeral 69 denotes an apparatus main body, which is installed in a trunk room or the like.

Next, the structure of the apparatus main body 69 will be described. 70 is a CPU (Central Processing Unit) for performing various calculations, 71 is a ROM (program ROM) storing programs for various calculations performed by the CPU 70, 72 is an azimuth sensor 61, a distance sensor 62, a GPS receiver 65,
Data from the CD-ROM drive 66 and the like and the CPU 70
(D-RAM) for storing the calculation results and the like in, 73
Is a backup memory (S-memory) for holding necessary data even when power supply to the apparatus main body 69 is stopped.
RAM), 74 is a memory (Kanji, font ROM) storing patterns of characters and symbols to be displayed on the liquid crystal display 68A, and 75 is for forming a display image based on map data, current position data of the own vehicle, and the like. An image processor 76 includes map data, current position data, kanji, and font ROM 7 output from the image processor 75.
A memory (V-RAM) for storing images to be displayed on the liquid crystal display 68A by synthesizing kanji characters and fonts such as street names and road names output from 4 and 77 is for converting output data of the V-RAM 76 into color signals. And the converted color signal is output from the RGB conversion circuit 77 to the liquid crystal display 68A. 78 is a communication interface. As shown in FIG. 7, on the liquid crystal display 68A, a surrounding map of the current position of the own vehicle is displayed together with a town name, an intersection name, a road name, and the like. The vehicle mark 79 is displayed. 80 is a scale bar.

FIG. 8 shows a format of map data stored in the CD-ROM 67. 81 is a disk label, 82 is a drawing parameter, 83 is map management information, 8
Reference numerals 4 and 85 denote maps, which store background data, character data, road data, and the like, and store data for each unit map obtained by dividing a terrain map of Japan by latitude and longitude. I have. The leaves are set from leaves 84 (level 2), which roughly describes a wide area, to leaves 85 (level 0), which describe a narrow area in detail. Each leaf is a map describing the same region. It is composed of display levels A, B and C. Map display levels A, B, and C are B, B
C is described in more detail. Each of the map display levels A, B, and C is composed of map display level management information and a plurality of units. A unit describes a divided region obtained by dividing a region at each map display level into a plurality of regions. Each unit includes a unit header, a character layer,
It is composed of a background layer, a road layer, an option layer, and the like. Place names, road names, facility names, and the like displayed on the map are recorded in the character layer, data for drawing roads, facilities, and the like are recorded in the background layer, and as shown in FIG. Stores 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. In FIG. 9, circles (印) indicate nodes, and lines between nodes indicate links. A black circle (丸) of the node number: 4 indicates an intersection node. The data recorded in the road layer is not directly involved in the data map display, but is used as road network information for map matching.

In FIG. 6, the output of the direction sensor 61 and the output of the distance sensor 62 are transmitted to the C
It is sent to PU70. The CPU 70 calculates the current position of the own vehicle, and obtains the latitude and longitude of the current position. The current position is corrected based on the data from the GPS receiver 65. Based on the current position obtained in this manner, the map data of the unit corresponding to the current position is stored in the CD-ROM drive 66 by the CD-ROM drive 66.
The map data is read from the memory 67 and stored in the memory (D-RAM) 72 via the communication interface 78. Part of the map data stored in the D-RAM 72 is read by the CPU 70 and
Is converted into image data and written into the V-RAM 76. The image data stored in the V-RAM 76 is RGB
The color signal is converted by the conversion circuit 77 into a color signal,
A, and a map of a predetermined range centering on the current position is displayed. If the map data read from the D-RAM 72 includes character codes and symbol codes, patterns corresponding to these character codes and symbol codes are kanji,
Since the characters are read from the font ROM 74, characters such as place names and symbols such as schools are displayed on the liquid crystal display 68A together with the map. Further, the current position displayed on the liquid crystal display 68A is sequentially changed based on the traveling speed and the traveling azimuth sequentially obtained as the vehicle travels.

Next, a map display operation of the above-mentioned conventional example will be described with reference to FIG. As shown in FIG. 10, in step 101, an input of a scale of a map to be displayed on the liquid crystal display 68A is received. In step 102, it is determined whether the input is an enlargement request or a reduction request. Depending on each case, the scale is added by one step in step 103, or the scale is reduced by one step in step 104. Then step 10
In step 5, a scale bar is displayed, and in step 106, the elapse of time from the last input from the scale key is determined.
If it is determined that the predetermined time has elapsed, the scale is determined in step 107. The map display data of the scale determined in this way is stored in the CD-ROM in step 108.
Read from 67. Based on the data read from the CD-ROM 67, the liquid crystal display 6
Draw a map on 8A. Next, at step 110, the CD-R
The road network data recorded in the road layer is read from the OM 67, the position and orientation of the own vehicle are determined from the road network data and the current position data calculated by the CPU 70 in step 111, and the liquid crystal is determined in step 112. The own vehicle mark is displayed on the map displayed on the display 68A.

[0007]

However, in the above conventional example, there is a scale switching step in accordance with the number of map scales incorporated in the apparatus, and as shown in FIG. 7, a scale bar 80 is provided on the liquid crystal display 68A. When the scale is provided in multiple steps, the scale switch operation for each step by the wide area switch touch switch 68B causes the touch switch to be switched until the map of the scale required in the case of greatly changing the scale is selected. I had to keep pushing. For this reason, it is necessary to confirm the scale, such as visual recognition.

As described above, in the conventional example, since it is impossible to select an arbitrary scale immediately, it takes time and effort to check the scale of the displayed map.
There was a problem in operability during driving.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problem, in which a scale of a map displayed on a display is not switched every step, but a map of a desired scale is displayed by a single operation. It is an object of the present invention to provide a traveling position display device capable of performing the following.

[0010]

In order to achieve the above object, the present invention provides a vehicle position detecting means for detecting a vehicle position and a map data reading means for reading map data from a storage medium storing a place name index. If, when displaying the read the map data and said detected vehicle position in correspondence
Both display a dedicated scale registration screen that does not include map data.
And Shimesuru display unit, an operation input unit for inputting an instruction destination or scale, and route search means for dynamically searching for a route to the destination, prepared in advance in accordance with the scale registration screen
A scale registering means for registering a user-selected scale from the scale, and the scale key display means for displaying the scale switching touch key based on the the registered scale, selected by the displayed touch key scale those having a scale execution unit for switching the scale of the map, and control means for controlling said each means depending on.

[0011]

According to the present invention, a desired scale group selected from all the scales is first registered by the scale registering means, and each of the registered scales has a scale change touch key. Are displayed on the display means, and by operating this touch key, the scale of the display map is switched, and the desired scale can be immediately selected.

[0012]

An embodiment of the present invention will be described below.
FIG. 1 is a schematic block diagram of a traveling position display device according to one embodiment of the present invention. In FIG. 1, reference numeral 11 denotes an own-vehicle position detecting means for detecting the own-vehicle position, and includes an azimuth sensor, a distance sensor, a GPS receiver, and the like. Reference numeral 12 denotes map data reading means for reading map data from a storage medium storing a place name index, and is realized as a CD-ROM drive for reading map data stored in a CD-ROM. 1
Reference numeral 3 denotes display means for displaying the read map data in correspondence with the detected position of the vehicle. Reference numeral 14 denotes operation input means for inputting an instruction of a destination and a scale. This is realized by a touch panel arranged on the front. Reference numeral 15 denotes route search means for dynamically searching for a route to the destination, which is executed by the CPU calculating based on a program stored in the ROM. 16 scale registration means for registering a user-selected scale from the scale previously prepared, condensation is which is the registered 17
Scale key display means for displaying the scale switching touch key based on the scale, 18 scale execution means for switching the scale of the map in accordance with the scale selected by the touch key displayed, 19 processes each signal in the apparatus Control means for displaying the traveling position of the own vehicle on the display means 13.

Next, the operation of the above embodiment will be described. Since the overall traveling position display processing of the apparatus is the same as the conventional example, here, the scale switching processing will be described. First, the scale registration processing by the scale registration means 16 will be described with reference to FIG. It should be noted that three steps of detailed scale frequently used, for example, 1 / 12.8 million, 1/640, 1 / 16,000, etc., are set in advance as touch keys, and the user sets other scales. . First, a menu screen for scale registration as shown in FIG. 3 is displayed (step 21). From this menu screen, the user inputs the desired scale using the enlargement key 32, the determination key 33, and the reduction key 34 of the scale setting key 31 (step 22). Next, the input scale setting key 31 is the enlargement key 32 or the confirmation key 3
3 or the reduction key 34 (step 23). In the case of the enlargement key 32, the display magnification is enlarged by one step (step 24), the display of the scale bar display 35 is changed (step 25), and the process returns to step 22. If the input key is the reduction key 34 (step 26), the display magnification is reduced by one step (step 27), and the reduced bar display 3
5 is changed (step 25), and the process returns to step 22. If the input key is the confirmation key 33, the scale registration confirmation processing is performed (step 28), and the one scale registration processing ends.

Next, the scale change processing will be described with reference to FIG. First, it is determined whether or not the scale change mode is based on the touch key preset by the scale registration process described above (step 41). If the scale is not registered, the input of the scale change key is accepted as in the conventional example (step 42), and the desired scale is selected and displayed on the map in the same manner as described above, and the scale change key is deleted (step 42). Steps 43-50). If the input touch key is registered at a reduced scale, the reduced scale key display unit 17 switches the conventional scale change display screen shown in FIG.
Is displayed, and the scale switching touch key 55 registered in the scale is displayed (step 51). When the user selects and inputs a desired scale from the scale switching touch key 55 (step 52), the scale execution means 18 changes the display magnification of the map to the input scale and displays the map (step 53). The scale bar is displayed above (step 54).

As described above, according to the above-described embodiment, instead of changing the map scale for each step, a scale frequently used is registered in advance and selected from the registered scales. Can be performed.

[0016]

According to the present invention, as is clear from the above examples, the scale registration means for registering a user-selected scale from the scale previously prepared, scale switching touch based on this registered scale A scale key display means for displaying keys and a scale execution means for switching the scale of the map in accordance with the scale selected by the displayed touch key, so that the desired scale can be operated by one touch key operation. By improving the operability, the driver's safety during traveling can be improved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a scale registration process in one embodiment of the present invention.

FIG. 3 is a screen diagram of a scale registration process according to an embodiment of the present invention.

FIG. 4 is a flowchart of a scale change process according to an embodiment of the present invention.

FIG. 5 is a screen diagram of a scale change process according to an embodiment of the present invention.

FIG. 6 is a block diagram of a traveling position display device in a conventional example.

FIG. 7 is a screen diagram of a scale change process in a conventional example.

FIG. 8 is a format diagram of a CD-ROM storing map data.

FIG. 9 is a road data map stored in a CD-ROM storing map data.

FIG. 10 is a flowchart showing a scale change process in a conventional example.

[Explanation of symbols]

 11 own vehicle position detecting means 12 map data reading means 13 display means 14 operation input means 15 route search means 16 scale registration means 17 scale key display means 18 scale execution means

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G08G 1/0969 G01C 21/00 G06T 1/00 G09B 29/10

Claims (1)

(57) [Claims] 1. A and the vehicle position detecting means for detecting a vehicle position, a map data reading means for reading map data from a storage medium storing the gazetteer, read the map data and said detected vehicle When displaying the position in correspondence
Both display a dedicated scale registration screen that does not include map data.
And Shimesuru display unit, an operation input unit for inputting an instruction destination or scale, and route search means for dynamically searching for a route to the destination, prepared in advance in accordance with the scale registration screen
A scale registering means for registering a user-selected scale from the scale, and the scale key display means for displaying the scale switching touch key based on the the registered scale, selected by the displayed touch key scale A travel position display device comprising: a scale execution unit that switches a scale of a map in accordance with the control unit; and a control unit that controls each of the units.