JPH05303332A - Position information display device - Google Patents

Abstract

PURPOSE:To provide the position information display device capable of easily recognizing the present position or the like. CONSTITUTION:The image of a paper map which is divided into plural areas of the same square and has information of each area is displayed on a display device 25, and a present position T and a running locus R are displayed to overlap this image with a fractionalized area SSER as the unit. In this case, the display of the inside of a subarea SER including the present position T is inverted in distinction from other subareas. The display picture and the paper map correspond to each other to improve the visual recognizability, and the display position and a map book are easily allowed to visually correspond to each other, and the paper map is referred in accordance with the display picture to easily recognize the position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position information display device for displaying position information such as a current position or a destination in a vehicle traveling guide device or the like.

[0002]

2. Description of the Related Art In recent years, development of a vehicle travel guide device has been actively conducted. In this vehicle travel guide device,
In addition to displaying and guiding a travel route from the current position to the destination, it is also known that the entire travel route can be grasped by displaying the travel locus.

The applicant of the present invention has proposed a position information display device for use in such a vehicle traveling guide device (Japanese Patent Application No. Hei 3).
-111828). This position information display device is a position information display device that displays position information on a display corresponding to a paper map having area information for each of a plurality of areas divided into the same shape. Map book information storage means for storing map book information such as name, page number and area information, information input means for inputting position information of display target from a higher-level device, and position information storage for storing position information of display target And means for displaying the map book information corresponding to the position information of the display target on the display device by the image of the double-page spread of the paper map, and stored in the position information storage means. Position display means for displaying the display target position on the display unit based on the position information.

According to the position information display device described above, for example, as shown in FIG. 2, when the device is activated, the liquid crystal dot matrix display 1 has ruled lines for partitioning areas and vertical and horizontal lines around the ruled lines. A, B, C ..., which represent the coordinates
Coordinate characters such as 1, 2, 3 ... Are displayed, and the image of the spread page of the atlas is displayed. Further, in the display areas D1 to D3 next to this image, the map book name, the main city name in the display area, and the page number of the spread page in the map book are displayed. In addition, the small area defined by the ruled lines is divided into a plurality of subdivided areas, and these subdivided areas are associated with the dots of the display unit, and the current location DT or the destination is displayed corresponding to the dots. To be done.

As described above, the display screen and the map book correspond to each other, and the visibility is good, and the position can be easily recognized by looking at the map book corresponding to this display screen.

[0006]

However, in the above-mentioned conventional position information display device, since the present location or the destination is displayed by the display of the subdivided area, that is, the dot display, the visual information with the map book is displayed. There was a problem that it was difficult to handle.

In view of the above problems, it is an object of the present invention to provide a position information display device capable of easily recognizing the current position and the like.

[0008]

To achieve the above object, the present invention provides a display device corresponding to a paper map having area information for each of a plurality of areas divided into the same shape. A position information display device for displaying position information,
Map book information storage means for storing map book information such as the name, page number and area information of the paper map, information input means for inputting position information of a display target from a higher-level device, and input from the information input means Information conversion means for converting the generated position information into the position of the area, position information storage means for storing the position information of the display target as the position of the area converted by the information conversion means, and the position information of the display target The map book information corresponding to the map book information display means for displaying the map book information on the display by the image of the double-page spread of the paper map, the position of the area stored in the position information storage means, and the map book information. On the basis of the above, each of the area corresponding to the display target position and the area group consisting of a plurality of areas surrounding the area is different from the areas adjacent to these areas. Suggest positional information display device that includes a position display means for displaying on said display device in 示色.

According to a second aspect of the present invention, in the position information display device according to the first aspect, a display device for monochrome display is used, and the map information information display means and the position display means perform a monochrome display processing. To propose.

[0010]

According to the first aspect of the present invention, the position information of the display object is input from the host device by the information input means, and the position information is converted into the position of the area of the paper sheet map by the information conversion means. The map book information storage unit stores map book information such as the name, page number, area information of the paper sheet map, and the map book information display unit stores the map book information corresponding to the position information. The image is displayed on the display unit in the image of the spread page of the map. Further, the position information of the display target is stored in the position information storage means as the position of the area converted by the information conversion means. Further, based on the position of the area stored in the position information storage means and the map book information, the position display means selects an area corresponding to the display target position and a plurality of areas within a predetermined range surrounding the area. Each of the area groups is displayed on the display in a display color different from that of the area adjacent to the image area.

According to a second aspect, the map book information corresponding to the position information is displayed in monochrome on the display by the map book information display means, and the display target position is displayed by the position display means. And an area group consisting of a plurality of areas within a predetermined range surrounding the area are displayed in monochrome on the display in a display color different from the areas adjacent to the area. In this case, for example, an area corresponding to the display target position and a plurality of areas surrounding the area group are normally displayed, and the area group is highlighted.

[0012]

1 is a block diagram of a vehicle travel guide device to which the present invention is applied. In the figure, 10 is a vehicle travel guide device main body (hereinafter referred to as the main body), 21 is a GPS receiver,
22 is a vehicle speed sensor, 23 is a direction sensor, 24 is a remote control device, 25 is a liquid crystal display (hereinafter referred to as a display), 2
6 is a memory card.

Although not shown, the main body 10 has a box shape and is arranged in a console or the like near the driver's seat of the vehicle. Inside thereof, a CPU 11, a ROM 12, a RAM 13, a memory card interface unit 14, a graphic controller 15, a graphic memory 16, and an interface unit 17 connected to a GPS receiver 21, a vehicle speed sensor 22 and a direction sensor 23, Graphic memory 16
Other components except for are connected to the CPU 11 via a bus BS such as an address bus and a data bus.

The RAM 13 is backed up by a battery, and the position information of the present location or the starting location and a plurality of destinations is stored or read by a signal from the CPU 11. The memory card interface unit 14 has a connector that fits into the memory card 26, and connects the memory card 26 and the bus BS so that they can be separated.

Further, a graphic memory 16 and a display 25 are connected to the graphic controller 15, and display is performed on the display 25 based on drawing data stored in the graphic memory 16 as is well known.

The GPS receiver 21 is formed in a portable small size, has a built-in battery and a liquid crystal display, and can be used as a single unit by connecting a portable antenna. This GPS receiver 21 is normally placed in the trunk of the vehicle except for an external antenna (not shown), receives radio waves from a plurality of satellites as is well known, and indicates the vehicle position to the CPU 11 in terms of longitude and latitude. The data is output.

The vehicle speed sensor 22 outputs the number of pulses corresponding to the number of rotations of the wheels to the CPU 11 as data.

The direction sensor 23 is composed of first and second geomagnetic sensors, an angular velocity sensor and the like. The detection values of these sensors are read by the CPU 11.

The remote control device 24 includes, for example, an interface circuit 240, a navigation selection switch 241, which is an alternate switch, a display changeover switch 242, which is a momentary switch, a destination selection switch 243, a RIGHT key 244, and a LEFT key. -245, UP key 246, DOWN key 247, clear key 248, and input / confirm switch 249 are provided. The on / off state of these switches is detected by the CPU 11 via the interface circuit 240 and the bus BS. In addition, the navigation selection lamp 24
1a is built in and turned on or off by the CPU 11 via the interface circuit 240 and the bus BS.

The display unit 25 is composed of a liquid crystal dot matrix display unit for monochrome display having a resolution of 160 × 80 dots or more, for example, and in the position display described later, it is at a predetermined position on the display surface and has the same rectangular shape in the map book described later. A ruled line representing the small area SER of is also displayed. Also,
8 × 8 dots are included in one small area SER,
The subdivision area SSER described later can be displayed by dots.

The memory card 26 is a non-volatile memory,
For example, it is composed of a ROM, and the data of a predetermined map book is previously stored in the memory card 26 as map book information. That is, for example, a map book is provided corresponding to each prefecture, and a memory card 26 in which map book information is stored is provided for each map book. As shown in FIGS. 3 to 5, the map displayed in the map book is subdivided into a grid shape in longitude and latitude, and is divided into large areas ER having the same rectangular shape that do not overlap each other. Each large area ER is printed on the spread of a map book, and further, within the large area ER, a unit length a in the longitudinal direction and the latitudinal direction, for example, in the case of a scale of 1 / 50,000, along the latitudinal line every 2.5 km. , A, B, C ... And the coordinates 1, 2, 3 ... Are assigned along the longitude line. In addition, in the display control processing of the present embodiment described later, the small area SE corresponding to the dot of the display device 25.
The inside of R is divided into eight in the longitude and latitude directions. As a result, the inside of the large area ER becomes the small area SER on the same square represented by the coordinates (A-1), (B-1), etc., and the inside of the small area SER becomes (A.1-1.2). , (B.2-1.
2) Same subdivision area SS represented by coordinates such as
It is divided into ER.

In the memory card 26 of each prefecture, as shown in FIG. 6 as map book information, for example, when the whole country is divided by the large area ER, the area reference point Q at the upper left corner of each large area ER is displayed. The map book name including the coordinates and the large area ERs are stored in the order of the large area numbers, and the map book name corresponding to the large area ERs included in the map book name, the unit length a, and the prefecture. The double-page spread page number P is stored. Here, a large area number is assigned in order from a large area ER having a large latitude in the coordinates of the area reference point Q, and large areas ER having an equal latitude in the area reference point are large areas in order from a large area ER having a large longitude in the reference point. A number is assigned. Further, FIG. 6 shows the map book information stored in the memory card 26 corresponding to the map book of Gunma prefecture as an example.

Next, the operation of the vehicle travel guide device using the position information display device of the present invention having the above-described structure will be described with reference to the display examples shown in FIGS. 7 to 12 and the control flow shown in FIGS. The explanation will be based on the chart. For example, when traveling or driving by car, the above-mentioned vehicle travel guide device and a map book including the corresponding area are carried, and the coordinates corresponding to the coordinates displayed on the image of the map book displayed on the display unit 25 are displayed. Then, you can easily recognize your position by looking at the map book.

In the case of using the vehicle travel guide device, the position information of the present location or the departure place and the destination is input in advance by operating the switch of the remote controller 24. These pieces of position information are input by the map book name, the spread page number P, the horizontal axis coordinates, and the vertical axis coordinates described above. In this case, if you press the input / confirmation switch 249 of the remote controller 24 once,
First, the position information input screen of the present location shown in FIG.
Displayed in. At this time, the input target item is highlighted.

That is, the characters "Genzaichi" are displayed, and the items to be input on the position information input screen of the current location are the destination number k1, the map book name k2, the second digit k3 of the double-page spread, and the double-page spread. The first digit of the number k4, horizontal axis coordinate k5,
An auxiliary coordinate k6 having a horizontal axis coordinate, a vertical axis coordinate k7, and an auxiliary coordinate k8 having a vertical axis coordinate are provided. At this time, the destination number k1 is "0
It is number 0.

To select an input target item, RIGHT key-24
4 Press LEFT key 245. Use UP key 246 or DOWN key 247 to change the content or number of the input item.
When is pressed, the content or number of the next candidate is displayed. The display content of each item is preset in the program of the CPU 11.

When the item of the destination number k1 is reversed and the UP or DOWN key 246 or 247 is pressed, the destination number is 0 to 20.
It changes to endless between and the position information input screen of the current location or destination corresponding to this number is displayed. Here, the destination numbers 1 to 20 are assigned to the positions of the destinations, and when the destination numbers 1 to 20 are selected, the destination position information input screen shown in FIG. 8 is displayed on the display device 25. The input method of each item at this time is the same as that described above. When all position information has been input, enter / confirm switch 249 again.
push. If you want to change or delete the position information, press the input / confirm switch 249 to display the position information that has been input, so you can correct only the changed part or press the clear key 248 to enter the current position of the input target. Alternatively, the input / confirmation switch 249 may be pressed after deleting the position information of the destination.

When the vehicle is traveling, dead reckoning is performed without using the GPS receiver 21, or the GPS receiver 2 is used.
When 1 is used and dead reckoning is also used, the navigation selection switch 241 is turned on at the input current position. Then, press the display changeover switch 242 to
The position information display screen shown in is displayed. On this position information display screen, ruled lines that partition the small area SER of the map book described above are displayed, and coordinate characters such as A, B, C ..., 1, 2, 3, ... Is displayed,
The image of the atlas is displayed.

Further, as shown in detail in FIG. 10, the current position T of the vehicle, the traveling locus R, and the destination are displayed in an overlapping manner on the image of the map book. At this time, in the small area SER including the current position T of the vehicle or the destination, the display is reversed from the other small areas SER. That is, within the small area SER that does not include the current position T of the vehicle or the destination, for example, the subdivision area S corresponding to the traveling locus R
When the SER is displayed in the bright state and the other parts are displayed in the dark state, the running locus R, the current position T, and the destination are displayed in the current position T of the vehicle or in the small area SER including the destination. The corresponding subdivision area SSER is displayed in the dark state, and the other parts are displayed in the bright state. As a result, when confirming the current position T and the destination, the display 2
5 can be easily associated with the vertical and horizontal coordinates of the map book, and the position can be easily recognized.

On the other hand, next to the image of the map book on the display screen is divided into a plurality of display areas D1 to D4. In each of the display areas D1 to D3, the map book name and the display corresponding to the memory card 26 are displayed. The main city name in the area and the page number of the large area ER in the map book are displayed, and the destination number is displayed in the display area D4.

The number of the next destination is displayed in the display area D4 at the start of the traveling or during the traveling. To change the number displayed in the display area D4, press the destination selection switch 243. Thus, every time the destination selection switch 243 is pressed, the number displayed in the display area D4 changes endlessly between 1 and 20.

Further, by pressing the display changeover switch 242 on the display unit 25, the display unit 25 can also be displayed as shown in FIGS.
The azimuth direction display screen and the required time display screen shown in can be selected and displayed. That is, on the azimuth direction display screen, the north direction is displayed by the star-shaped direction display symbol SA and the direction of the destination is displayed by the arrow-shaped direction display symbol TA with the upper part of the screen as the traveling direction of the vehicle. Further, the required time display screen displays the destination number, the distance to the destination, and the required time to reach the destination.

Therefore, when traveling toward a plurality of destinations in sequence, after reaching one destination, the destination selection switch 243 is operated to display the number of the next destination in the display area D4. .. As a result, the north direction and the direction of the destination are displayed on the azimuth direction display screen as described above.

The driver may drive toward the destination according to the display on the azimuth display screen. In addition, when the travel route to the destination is lost, the azimuth display symbol SA
By recognizing the north direction and looking at the map book based on the coordinates of the map displayed on the position information display screen, it is possible to recognize the current position of the vehicle and the traveling route to the destination. Further, when leaving the vehicle, by removing the GPS receiver 21 and carrying it alone, it is possible to recognize its own position in latitude and longitude.

Next, details of the control of the CPU 11 will be described based on the control flow charts shown in FIGS. As the initial setting, the CPU 11 sets the variable DS representing the display screen of the display 25 and the variable A representing the number of the next destination to 1 (S1), and then determines whether the input / confirm switch 249 is turned on. It is determined (S2), and when the input / confirmation switch 249 is not turned on, the process proceeds to S29 described later. When the input / confirm switch 249 is turned on, the process proceeds to the position information input process, and the RAM 1
The position information data stored in No. 3 is read (S
3). After that, the variable J representing the current position or the destination of the input target is set to 0, and the variable K representing the input target item is set to 1 (S4, S5) respectively, and the position information input screen of the J-th current position or the destination is set. Is displayed (S6). At this time, in the present embodiment, the display characters, ruled lines, etc. are normally displayed in a bright state.

Next, it is determined whether or not the value of the variable J is 0 (S7). If it is not 0, the process proceeds to S12, which will be described later, and if it is 0, the GPS receiver 21 can receive. It is determined whether or not, that is, whether or not the reception state of the radio wave in the GPS receiver 21 is good (S8). If the result of this determination is that reception is not possible, then the processing proceeds to S12, which will be described later, and if reception is possible, latitude and longitude data is input from the GPS receiver 21 (S9).

After that, the CPU 11 controls the GPS receiver 21.
The coordinates of the area on the map book including the current location are obtained based on the latitude and longitude data input from (S10), and the variable J
1 is added to the value of (S11), and the process proceeds to S6.

If the result of the determination in S7 is that the value of the variable J is not 0, or if the result of S8 is that reception is not possible, the CPU 11 reversely displays the Kth term (S1).
2), it is determined whether the RIGHT key 244 is turned on (S13). As a result of this determination, when the RIGHT key 244 is turned on, 1 is added to the value of the variable K (S14), and it is determined whether the variable K is 9 (S15). As a result of this determination, when the variable K is not 9, the process proceeds to S7, and when the variable K is 9, the value of the variable K is set to 1 (S16) and then the process proceeds to S7.

As a result of the determination in S13, the RIGHT key 244
If is not turned on, the CPU 11 determines whether or not the LEFT key 245 is turned on (S17). As a result of this determination, when the LEFT key 245 is turned on, 1 is subtracted from the value of the variable K (S18), and it is determined whether the variable K is 0 (S19). As a result of this determination, when the variable K is not 0, the process proceeds to S7, and when the variable K is 0, the value of the variable K is set to 8 (S20) and then the process proceeds to S7. By the processing of S12 to S20 described above,
Input target items k1 to k8 are selected.

As a result of the determination in S17, if the LEFT key 245 is not turned on, the CPU 11 moves the UP or DOWN key 24
It is determined whether the 6,247 is turned on (S21). As a result of this determination, when the UP or DOWN key 246, 247 is turned on, it is determined whether the variable K is 1 (S22).
As a result of this judgment, when the variable K is 1, it is assumed that the destination number k1 has been changed, and the position information input screen of the current location or destination of (J + 1) or (J-1) is displayed (S23). ), And shifts to the processing of S7. When the variable K is not 1 as a result of the determination in S22, the contents of the Kth term are updated to the previous candidate or the next candidate (S24), and then the process of S6 is performed. Items k1 to k8 by the processing of S21 to S24 described above.
The contents are updated and the input screen is selected.

When the UP or DOWN key 246 or 247 is not turned on as a result of the determination in S21, the CPU 11 determines whether the clear key 248 is turned on (S2).
5). If the result of this determination is that the clear key 248 has been turned on, the position information of the Jth current location or destination is deleted (S26), and then the flow shifts to the processing of S6. When the clear key 248 is not turned on, it is determined whether or not the input / confirmation switch 249 is turned on (S27), and when it is not turned on, the process proceeds to S6. Also, enter /
When the confirmation switch 249 is turned on, all the input positional information of the current position and the destination is stored in the RAM 13 (S28), and then the process proceeds to S2.

If the result of determination in S2 is that the input / confirm switch 249 is not turned on, the CPU 11 displays the destination number A in the display area D4 on the position information display screen (S29), and the destination selection switch 243 is activated. It is determined whether it is turned on (S30). As a result of this determination, when the destination selection switch 243 is not turned on, the process proceeds to the process of S34 described later, and when it is turned on, 1 is added to the variable A (S31), and whether the variable A is 21 or not. It is determined (S32). When the variable A is not 21 as a result of this determination, the process proceeds to S34 described later, and when the variable A is 21, the variable A is set to 1 (S33). After that, the position information of the No. A destination is displayed on the display device 25 for a predetermined time, for example, 3 seconds (S34). At this time, as described above,
The subdivision area SSER corresponding to the destination is displayed in a dark state, and the small area SER including this subdivision area SSER
The other subdivided areas SSER are displayed in a bright state.

Next, the CPU 11 causes the navigation selection switch 24
It is determined whether 1 is on (S35), and when it is off, the process proceeds to S42 described later. When the navigation selection switch 241 is turned on, after the navigation selection lamp 241a is turned on (S36), the rotation speed F of the wheels is counted (S37) based on the data from the vehicle speed sensor 22 (S37). Then, the traveling distance L is calculated (S38). Next, based on the data from the direction sensor 23, the north direction and the traveling direction of the vehicle are detected (S39, S40).

After that, vector calculation is performed using the distance L and the heading to calculate the latitude / longitude (E1, N1) of the vehicle position (S41). The above-described processing of S37 to S41 is repeatedly performed every predetermined time, for example, every 500 ms.

Next, the CPU 11 causes the GPS receiver 21
Determines whether it is receivable, that is, whether the reception state of the radio wave in the GPS receiver 21 is good (S4).
2) If reception is impossible, after setting the latitude (E1, N1) calculated in the process of S41 as the latitude (E, N) of the current position of the vehicle (S43), S4 to be described later.
The processing shifts to 6. Also, when reception is possible, GPS
Enter the latitude and longitude (E2, N2) from the receiver 21 (S4
4) Then, this latitude and longitude (E2, N2) is set as the longitude and latitude (E, N) of the current position of the vehicle (S45).

Next, the CPU 11 determines whether or not the memory card 26 is inserted (S46). If the memory card 26 is not inserted, the process proceeds to S66, which will be described later. After setting to 1 (S47), the latitude ni of the area reference point Q of the i-th large area ER is read from the memory card 26 (S48). Thereafter, it is determined whether or not the latitude N of the vehicle's current position is smaller than the latitude ni (S49). When the latitude N is equal to or greater than the latitude ni, the variable i is set to 1
Is added (S50), and the process proceeds to S48.

If the result of the determination in S49 is that the latitude N is smaller than the latitude ni, the CPU 11 reads the longitude ei of the area reference point Q of the i-th large area ER from the memory card 26 (S51). .. Then, it is determined whether or not the longitude E of the current position of the vehicle is smaller than the longitude ei (S5
2) If the longitude E is greater than or equal to the longitude ei, 1 is added to the variable i (S53), and the process proceeds to S51. Also,
When the longitude E is smaller than the longitude ei, 1 is subtracted from the variable i (S54), and the map book name MN0 is read from the memory card 26 (S55).

Next, the CPU 11 causes the i-th large area ER
After reading the respective data such as the latitude and longitude of the area reference point Q, the spread page number P, and the atlas name MN (S5)
6) It is determined whether the map book name MN0 is the same as the map book name MN (S57). As a result of this determination, when the map book name MN0 and the map book name MN are different, the process proceeds to S66 described later, and when the map book name MN0 and the map book name MN are the same, the area reference point Q The coordinates of the vertical axis and the horizontal axis in the map book are calculated based on the difference between the latitude and longitude ei, ni of the current position T and the longitude and latitude E, N of the current position T. That is, the CPU 11 subtracts the latitude N of the current position T from the latitude ni of the area reference point Q to obtain the latitude difference Δn (S5).
8). Next, the latitude difference Δn is converted into the ground surface distance Rn (S59).

For example, the latitude ni of the area reference point Q is 36.
Degree 4 minutes 00 seconds and the latitude N of the current position T is 36 degrees 41
When the time is 20 seconds, the latitude difference Δn is 40 seconds as shown in the equation (1), which is about 0.0111 degrees in degrees. Δn = 36 ° 42′00 ″ −36 ° 41′20 ″ = 40 ″ → 0.0111 ° (1) Further, when the radius r of the earth is 6378 km, the distance Rn of the ground surface corresponding to the latitude difference Δn is ( It is represented by the formula: Rn = 0.0111 ° / 360 ° × 2πr = 1.24km (2) After that, the CPU 11 calculates the coordinate of the vertical axis in the map book from the distance Rn (S60), that is, ( 3) As shown in the formula, the distance Rn is divided by the unit length a, and the fractional part is rounded up to find the coordinate on the vertical axis. Furthermore, the unit length a is divided into eight equal parts by the subdivision length b. , The subdivision coordinate is obtained by multiplying the value after the decimal point of the result of the expression (3) by 8 and rounding up the decimal point, and the coordinate of the vertical axis becomes 1.4. 1.24 / 2.5 = 0.496 → 1… ( 3) 0.496 × 8 = 3.968 → 4 (4) Next, the CPU 11 subtracts the longitude ei of the area reference point Q from the longitude E of the current position T to obtain a longitude difference Δ. The seek (S6
1). Next, the longitude difference Δe is converted into the ground surface distance Re (S62). For example, the longitude ei of the area reference point Q is 13
If the longitude E of the current position T is 139 degrees 02 minutes 10 seconds at 9 degrees 00 minutes 00 seconds, the longitude difference Δ as shown in equation (5).
e is 2 minutes and 10 seconds, which is approximately 0.036 when expressed in degrees.
It will be once. Δe = 139 ° 02′10 ″ −139 ° 00′00 ″ = 02′10 ″ → 0.0361 ° (5) Further, the distance Re on the ground surface corresponding to the longitude difference Δe is
It is expressed by equation (6). Re = 0.0361 ° / 360 ° × 2πr × cos (36 ° 41′20 ″) = 3.22km (6) After that, the CPU 11 calculates the coordinates of the horizontal axis in the map book from the distance Re as described above ( S63) That is, the distance Re is divided by the unit length a, and the fractional part is rounded up to find the coordinates on the horizontal axis. The coordinates of the divided area SSER are obtained, and the coordinates of the horizontal axis are 2.3.

Next, the CPU 11 determines whether or not the subdivision area SSER including the current position has been updated based on the calculated coordinates of the vertical axis and the horizontal axis (S64). As a result of this determination, if the subdivision area SSER including the current position is not updated, the process proceeds to S66, which will be described later, and if it is updated, the trail page of the map book corresponding to the current position is stored in the locus information storage area of the RAM 13. The number and the coordinates of the horizontal axis and the vertical axis are stored as trajectory information (S65). On this occasion,
Since the locus information is stored in the RAM 13 in units of subdivision areas, the amount of information can be reduced.
The capacity can be reduced.

Next, the CPU 11 uses the display changeover switch.
It is determined whether or not 242 is turned on (S66). If not turned on, the process proceeds to S70 described later, and if turned on, 1 is added to the variable DS (S67). As a result, the display screen of the display 25 is changed by the processing described later.

Next, the CPU 11 determines whether or not the variable DS is 4 (S68), and when it is 4, sets the value of the variable DS to 1 (S69) and then determines whether or not the variable DS is 1. Is determined (S70). As a result of this determination, the variable DS is 1
If not, the process proceeds to S78, which will be described later, and the variable DS
When is 1, it is determined whether the memory card 26 is inserted (S71). The CPU 11 can detect whether or not the memory card 26 is inserted by detecting the voltage of a predetermined pin of the connector in the memory card interface unit 14.

As a result of the determination in S71, the memory card 2
When 6 is not inserted, the character string "memory card message" is displayed on the display unit 25 for a predetermined time (S72), and then the process shifts to S2. When the memory card 26 is inserted, it is determined whether the map book name MN0 and the map book name MN are equal (S73). As a result of this determination, the map book name MN0
If the map book name MN is not equal to
Then, the characters "Genzaichi" and the map book name are displayed for a predetermined time (S74), and the process proceeds to S2. Also,
When the map book name MN0 and the map book name MN are equal,
Display the location information display screen. That is, the map book image is displayed (S75), and the map book name including the current position, the main city name, the page number of the large area, and the destination number are displayed (S76). Further, the locus of the traveling route is displayed based on the locus information stored in the RAM 13 (S
77). At this time, as described above, in the small area SER including the current position T of the vehicle, the subdivision area SSER corresponding to the traveling locus and the current position T is displayed in the dark state, and the other parts are displayed in the bright state. In addition, in the small area SER that does not include the current position T of the vehicle, the subdivided area SSER corresponding to the traveling locus is displayed in a bright state and the other portions are displayed in a dark state. After this, S2
Process shifts to.

When the variable DS is not 1 as a result of the determination in S70, the CPU 11 determines whether the variable DS is 2 (S78). When the result of this determination is that the variable DS is 2, the north direction is displayed by displaying the azimuth direction display screen shown in FIG. 11 on the display 25 (S79).
In addition, based on the latitude and longitude (E, N) of the current position of the vehicle, the traveling direction and the latitude and longitude (EA, NA) of the No. A destination,
The direction of the destination is displayed (S80). At this time, since the position information of the destination is input in the coordinates of the subdivision area SSER described above, the longitude and latitude of the center point of the subdivision area SSER is used as the latitude and longitude (EA, NA) of the destination. .. Since the subdivided area SSER has a square shape of about 300 m in length and width, sufficient accuracy can be obtained in use. After that, the processing shifts to the processing of S2.

If the result of the determination in S78 is that the variable DS is not 2, the CPU 11 reads out the position information of the No. A destination (S81) and calculates the distance to the current position of the vehicle (S82). At the same time, the time required to reach the destination is calculated (S83). This required time is, for example, 50 km / h on average.
The time it takes to drive in. Then CP
U11 displays the distance to the No. A destination and the required time on the display 25 (S84), and then shifts to the process of S2.

The accuracy of the GPS receiver described above is usually within the range of ± 100 m, which is called a c / A code that can be used in the private sector. Therefore, the position of the vehicle can be recognized with sufficiently high accuracy.

In this embodiment, the small area SER on the map book is used.
Is a square with a side of 2.5km, and the subdivision area SSER is a square with a side of about 300m. In the suburbs, if you look at the area of a side of 2.5km on the map, the vehicle position and driving route are sufficient. Can be recognized. In addition, in urban areas, the range of about 300 m on a side corresponds to the map, and if you look at the size of the road and surrounding conditions such as road signs, you can easily recognize the position of the vehicle and the driving route. it can.

Therefore, as described above, by expressing the position using the area, it is possible to obtain sufficient information for recognizing the position of the vehicle and the traveling path. Also expensive CD
-Since a storage medium such as a ROM and a CRT display are not used, and a monochrome display having a minimum necessary resolution is used, the cost is much lower than that of a conventional vehicle travel guide device, and it can be popularized. it can.

Further, in the process of displaying the locus of the traveling route, the coordinates of the same subdivided area are not continuously stored unless the subdivided area of the traveling route is updated. Therefore, the capacity of the RAM 13 for storing the locus information. Can be reduced.

The area range and the like in this embodiment are merely examples, and the present invention is not limited to this.

Further, in the present embodiment, one dot of the display device 25 corresponds to the subdivided area SSER, but the present invention is not limited to this, and the same applies when a display device having a higher resolution is used. It goes without saying that the effect of is produced.

In the present embodiment, the monochrome display 25 is used, but the present invention is not limited to this.
For example, even when a color display is used, an area group including subdivision areas SSER corresponding to the current position and destination and other subdivision areas SSER in the small area SER including the subdivision area SSER. The same effect can be obtained by displaying each of these on the display device 25 in a display color different from that of the area adjacent thereto. Further, in this case, instead of changing the color of the entire area, only the color of the frame of the target area may be changed and displayed.

On the other hand, in this embodiment, the map book and the memory card 26 are provided for each prefecture, but the map information over the whole country may be stored in one memory card 26. However, in this case, a large-capacity memory card 26 is required, resulting in a high cost and little merit.

Further, it is easy to input the data of the road-to-vehicle communication system such as the sign post and the beacon to indicate the position on the map.

Furthermore, in this embodiment, the position information display device of the present invention is applied to the vehicle travel guide device, but the present invention is not limited to this.

[0066]

As described above, according to claim 1 of the present invention, each of the area corresponding to the display target position and the area group consisting of a plurality of areas surrounding the area are With a display color different from the area adjacent to
Since it is displayed on the display overlaid on the image of the paper sheet map,
Correspondence between the display screen and the paper map and good visibility,
It is easy to establish a visual correspondence between the display position and the paper map, and the position can be easily recognized by looking at the paper map corresponding to this display screen. Further, since a map of roads and the like is not displayed, these enormous amounts of data are stored in memory C
Since a large storage medium such as a D-ROM is not required, the device can be downsized, can be supplied at a low price, and can be widely popularized, which is a very excellent effect. It is a thing.

According to the second aspect, in addition to the above effect, since the monochrome display is used, an excellent effect that the cost can be further reduced is exhibited.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of a vehicle travel guide device to which the present invention is applied.

FIG. 2 is a diagram showing a display example in a conventional example.

FIG. 3 is a diagram showing a configuration of a map book according to an embodiment.

FIG. 4 is a diagram showing a configuration of a map book according to an embodiment.

FIG. 5 is a diagram showing a configuration of a map book in one embodiment.

FIG. 6 is a diagram showing an example of map book information stored in a memory card according to an embodiment.

FIG. 7 is a diagram showing a display example in one embodiment.

FIG. 8 is a diagram showing a display example in one embodiment.

FIG. 9 is a diagram showing a display example in one embodiment.

FIG. 10 is a diagram showing a display example in one embodiment.

FIG. 11 is a diagram showing a display example in one embodiment.

FIG. 12 is a diagram showing a display example in one embodiment.

FIG. 13 is a control flowchart in one embodiment.

FIG. 14 is a control flowchart in one embodiment.

FIG. 15 is a control flowchart in one embodiment.

FIG. 16 is a control flowchart in one embodiment.

FIG. 17 is a control flowchart in one embodiment.

FIG. 18 is a control flowchart in one embodiment.

[Explanation of symbols]

10 ... Vehicle traveling guide device main body, 11 ... CPU, 12 ... R
OM, 13 ... RAM, 14 ... Memory card interface section, 15 ... Graphic controller, 16 ... Graphic memory, 17 ... Interface section, 21 ... GPS
Receiver, 22 ... Vehicle speed sensor, 23 ... Direction sensor, 24 ...
Remote control device, 25 ... indicator, 26 ... memory card.

Claims (2)

[Claims] 1. A position information display device for displaying position information on a display device corresponding to a paper map having area information for each of a plurality of areas divided into the same shape, the name of the paper map, Atlas information storage means for storing atlas information such as page number and area information, information input means for inputting positional information of a display target from a higher-level device, and positional information input by the information input means for the area information Information conversion means for converting the position information of the display target as the position of the area converted by the information conversion means, and the map book information corresponding to the position information of the display target Based on the map book information and the map book information display means for displaying on the display by the image of the double-page spread of the paper map. And a position display for displaying each of an area corresponding to the display target position and an area group consisting of a plurality of areas within a predetermined range surrounding the area in a display color different from that of an area adjacent to these areas. And a position information display device. 2. The position information display device according to claim 1, wherein a display device for monochrome display is used, and the map book information display means and the position display means perform a monochrome display process.