JPH11304504A - Car navigation device and map display method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a car navigation device and the map display method for easily understanding a map by displaying only required information on the screen of a display device. SOLUTION: This car navigation device capable of the processing operations of both normal navigation and handy navigation is provided with a selection means for selecting the handy navigation, and a handy navigation execution means for storing map data read from the memory of a CD 6 or the like in a display memory 7, displaying them at the display device 8, then clearing the screen of the display device, and then performing limited prescribed display such as the widened width of a road, mark display and present vehicle position display, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car navigation device capable of performing both normal navigation and simple navigation processing operations, and a map display method therefor.

[0002]

2. Description of the Related Art FIG. 1 is a device block diagram showing a general car navigation device, and FIG. 2 is a panel diagram showing an input device constituting the car navigation device of FIG. 1 and 2, 1 is a CPU, 2 is an input device,
3 is a GPS (Global Positioning System), 3a is an antenna,
4 is ROM, 5 is RAM, 6 is CD, 7 is display memory,
8 is a display device, 9 is a movement switch, 9a is an up key, 9b
Is an upper left key, 9c is a left key, 9d is a lower left key, 9e is a lower key, 9f is a lower right key, 9g is a right key, 9h is an upper right key, and K1 is an OK key.

[0003] Regarding a conventional car navigation device,
The map display operation will be described with reference to FIG. FIG. 6 is a map display diagram for explaining a map display method in a conventional car navigation device. In FIG. 6, reference numeral 10 denotes a screen of the display device 8.

[0004] The map data is read from, for example, a CD 6, and the read map data is displayed as it is as shown in FIG. In this figure, railway stations, place names, road names, and the like are displayed in a cluttered manner, making the display very difficult to understand, placing a burden on the driver who must pay considerable attention to driving. .

[0005]

As described above, in the conventional car navigation system, the map data read from the CD 6 is displayed on the screen 10 of the display device 8 as it is. Understanding the map is a burden for the driver who drives based on it.

In the car navigation apparatus and the map display method of the car navigation apparatus, it is required that the map is easily understood by displaying only necessary information on a screen of the display apparatus.

The present invention makes it easier to understand a map by displaying only necessary information on a screen of a display device, and displays only necessary information on a screen of a display device to facilitate understanding of a map. It is an object of the present invention to provide a map display method for a car navigation device.

[0008]

SUMMARY OF THE INVENTION In order to solve this problem, a car navigation device according to the present invention is a car navigation device capable of performing both normal navigation and simple navigation processing operations. Selecting means and map data read from a memory such as a CD are stored in a display memory and displayed on a display device, and then the screen of the display device is cleared.
There is provided a configuration having simple navigation executing means for performing limited predetermined displays such as road widening, landmark display, and vehicle position display.

Thus, a car navigation device is provided in which only the necessary information is displayed on the screen of the display device so that the map can be easily understood.

A map display method for a car navigation device according to the present invention is a map display method for a car navigation device capable of performing both normal navigation and simple navigation processing operations, comprising a selection step for selecting simple navigation. After the map data read from the memory such as a CD is stored in the display memory and displayed on the display device, the screen of the display device is cleared, and then the widening of the road, the mark display, the vehicle position display, and the like are limited. A simple navigation execution step for performing a predetermined display.

As a result, a map display method for a car navigation device is provided in which only necessary information is displayed on the screen of the display device to facilitate understanding of the map.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention is a car navigation device capable of performing both normal navigation and simple navigation processing operations, and a selection means for selecting simple navigation, After the map data read from the memory such as a CD is stored in the display memory and displayed on the display device, the screen of the display device is cleared, and then the predetermined predetermined information such as road widening, landmark display, own vehicle position display, etc. And a simple navigation executing means for performing the display on the display device, which has an effect that only a limited display is displayed on the screen of the display device.

According to a second aspect of the present invention, in the first aspect of the present invention, the simple navigation executing means is a GP.
A map reading and displaying means for reading map data of roads around the own vehicle from a memory such as a CD based on the S output data, storing the read data in a display memory and displaying the map data on a screen of the display device, and a screen of the display device; Screen erasing means for clearing, road widening display means for widening and displaying the road around the vehicle read from the memory, and necessary map data extracted from the map data read from the memory and displayed on the screen of the display device. And means for extracting and displaying map data to be displayed, and has an effect that the road is displayed with its width widened and a limited one is displayed.

According to a third aspect of the present invention, there is provided a map display method of a car navigation device capable of performing both normal navigation and simple navigation processing operations, wherein a selection step for selecting simple navigation and a CD or the like are provided. After the map data read from the memory is stored in the display memory and displayed on the display device, the screen of the display device is cleared, and then a predetermined predetermined display such as road widening, landmark display, and vehicle position display is performed. A simple navigation execution step to be performed, and has an effect that only a limited display is displayed on the screen of the display device.

According to a fourth aspect of the present invention, in the third aspect of the invention, the simple navigation execution step comprises:
A map reading and displaying step for reading the map data of roads and the like around the own vehicle from a memory such as a CD based on the GPS output data, storing the read data in the display memory and displaying the map data on the screen of the display device; A screen erasing step for clearing, a road widening display step for widening and displaying the road around the vehicle read from the memory, and a necessary map data extracted from the map data read from the memory and displayed on a screen of the display device. And a step of extracting and displaying map data to be displayed, which has an effect that a road is displayed with its width widened and a limited one is displayed.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) The configuration of a car navigation system according to Embodiment 1 of the present invention is the same as in FIGS.

Hereinafter, the processing operation of the car navigation system according to the present embodiment will be described with reference to FIGS. FIG. 3 is a flowchart showing the operation (selection step) of the selecting means in the car navigation device according to the first embodiment of the present invention, and FIG. 4 is the operation (simple navigation) of the simple navigation executing means in the car navigation device according to the first embodiment of the present invention. Flowchart showing navigation processing, a simple navigation execution step),
FIG. 5 is a map display diagram showing a map display in the simple navigation process (simple navigation execution step).

In FIG. 5, reference numeral 10 denotes a screen of the display device 8,
11, 12, 13 are pachinko parlors, department stores, fast food stores as landmarks (marks), 14 is a direction mark, 15 is a road, 16 is an intersection, 17 is a road name, 18 is a direction line to a destination, 19 is the position of the host vehicle.

In FIG. 3, first, the CPU 1 displays a navigation menu indicating the type of car navigation (S1). Here, two types of normal navigation and simple navigation are displayed, and when performing simple navigation, the item of simple navigation is selected. Next, the CPU 1 determines which of the normal navigation and the simple navigation has been selected (S2).
When it is determined that the normal navigation is selected, the normal navigation processing is performed (S3), and when it is determined that the simple navigation is selected, the simple navigation processing is performed (S4).

Next, a simple navigation process will be described with reference to FIG. In FIG. 4, first, the own vehicle area map reading and displaying means (not shown) of the CPU 1 stores the data from the CD 6 into the RAM.
5, the map data is read out, stored in the display memory 7 and displayed on the screen of the display device 8 (S11,
Step of reading and displaying the map around the own vehicle). Next, the screen erasing means (not shown) of the CPU 1 temporarily turns the screen of the display device 8 gray (S12, screen erasing step).

Next, the road widening display means (not shown) of the CPU 1 widens and displays the road around the vehicle read from the CD 6 (S13 to S21, road widening display step). The road widening display unit first determines whether or not the data is road data (S13). If it is determined that the data is road data, then the thickness (road width) of the road is determined (S14),
When the road width is a one-dot road, the road is displayed in blue if it is an expressway or a motorway, otherwise it is displayed in white (S15), and the road width is displayed in five dots (S16). ). When the road width is a 2-dot road,
Expressways and motorways are displayed in blue,
Otherwise, it is displayed in white (S17) and the road width is set to 8
It is displayed as a dot (S18). If the road width is 3 dots or more, the road is displayed in blue if it is an expressway or a motorway, otherwise it is displayed in white (S
19) The road width is displayed with 11 dots (S20). If all the road displays have been completed, the process proceeds to step 22 (S21).

Next, the map data extraction and display means (not shown) of the CPU 1 extracts necessary map data from the map data read from the CD 6 and displays it on the screen of the display device 8 (S22, S23, Map data extraction and display step). Here, the map data extraction and display means displays landmarks (marks) 11, 12, and 13, directional marks 14, roads 15, intersections 16, road names 17, and direction lines 18 to the destination (S22). The own vehicle position 19 is displayed (S23).

Next, it is determined whether or not to end the navigation (S24). If the navigation is not to be ended, steps 11 to 23 are repeated.

In the present embodiment, the screen of the display device 8 is temporarily changed to gray in step 12, but the present invention is not limited to this, and it may be changed to green or blue once.
Anyway, the screen of the display device 8 may be cleared.

As described above, according to the present embodiment, the simple navigation is selected, the map data read from the CD 6 is stored in the display memory 7 and displayed on the display device 8, and then the screen of the display device 8 is cleared. Then, by performing limited predetermined displays such as road widening, landmark display, and vehicle position display, only the limited display on the screen 10 of the display device 8 is displayed. Therefore, it is possible to easily understand the map while driving a car.

[0026]

As described above, the car navigation device according to the first aspect of the present invention is a car navigation device capable of performing both normal navigation and simple navigation processing operations. Selection means for storing the map data read from a memory such as a CD in the display memory and displaying the map data on the display device, and then clearing the screen of the display device. By having the simple navigation executing means for performing a limited predetermined display such as a position display, it is possible to display only the limited display on the screen of the display device, so that the user can understand the map while driving a car. Has an advantageous effect that it can be easily performed.

According to the invention described in claim 2, according to claim 1
In the invention described in (1), the simple navigation executing means reads the map data of the road and the like around the own vehicle from the memory such as a CD based on the GPS output data, stores the map data in the display memory, and displays the map data on the screen of the display device. Neighboring map reading and displaying means, screen erasing means for clearing the screen of the display device, road widening displaying means for widening and displaying the roads around the vehicle read from the memory, and necessary map data from the map data read from the memory Map data extracting and displaying means for extracting and displaying on the screen of the display device a simple map data so that the road can be displayed in a widened state, and only the screen limited to the screen of the display device is displayed. Therefore, in addition to the effect of the invention described in claim 1, the road around the own vehicle is widened in correspondence with the actual road width and the road condition is increased. Advantageous effect can be made understand that more easily is obtained.

According to a map display method for a car navigation device according to a third aspect of the present invention, a map display method for a car navigation device capable of performing both normal navigation and simple navigation processing operations. A selection step for selecting, storing the map data read from the memory such as a CD in the display memory and displaying the map data on the display device, and then clearing the screen of the display device. A simple navigation execution step of performing a limited predetermined display such as a vehicle position display, so that only the limited one can be displayed on the screen of the display device. An advantageous effect that understanding can be facilitated is obtained.

According to the invention described in claim 4, according to claim 3,
In the invention described in (1), the simple navigation execution step reads the map data of the road and the like around the own vehicle from the memory such as a CD based on the GPS output data, stores the map data in the display memory, and displays the map data on the screen of the display device. Neighboring map reading and displaying step, screen erasing step to clear the screen of the display device, road widening displaying step to widen and display the road around the vehicle read from the memory, and necessary from map data read from the memory A map data extracting and displaying step of extracting and displaying on the screen of the display device a simple map data so that the road can be displayed in a widened state, and only the screen limited to the screen of the display device is displayed. Therefore, in addition to the effects of the invention described in claim 3, the roads around the own vehicle correspond to the actual road width. Advantageous effect of the grasping widening to road conditions can be made more easily Te is obtained.

[Brief description of the drawings]

FIG. 1 is a device block diagram showing a general car navigation device.

FIG. 2 is a panel diagram of an input device included in the car navigation device.

FIG. 3 is a flowchart showing selection steps in the car navigation device according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a simple navigation process in the car navigation device according to the first embodiment of the present invention.

FIG. 5 is a map display diagram showing a map display in a simple navigation process (simple navigation execution step).

FIG. 6 is a map display diagram for explaining a map display method in a conventional car navigation device.

[Explanation of symbols]

 Reference Signs List 1 CPU 2 Input device 3 GPS (Global Positioning System) 3a Antenna 4 ROM 5 RAM 6 CD 7 Display memory 8 Display device 9 Movement switch 9a Up key 9b Upper left key 9c Left key 9d Lower left key 9e Lower key 9f Lower right key 9g Right key 9h Upper right key 10 Screen 11 Pachinko parlor 12 Department store 13 Fast food restaurant 14 Direction mark 15 Road 16 Intersection 17 Road name 18 Direction to destination 19 Own vehicle position K1 OK key

Claims (4)

[Claims] 1. A car navigation device capable of performing both normal navigation and simple navigation processing operations, wherein a selection means for selecting the simple navigation and map data read from a memory such as a CD are stored in a display memory. Having a simple navigation executing means for clearing the screen of the display device after storing and displaying on the display device, and then performing limited predetermined display such as road widening, landmark display, own vehicle position display, etc. A car navigation device characterized by the above-mentioned. 2. The simple navigation executing means includes a GP
A map reading and displaying means for reading map data of roads around the own vehicle from a memory such as a CD based on the S output data, storing the read data in a display memory and displaying the map data on a screen of the display device, and a screen of the display device; Screen erasing means for clearing, road widening display means for widening and displaying the road around the vehicle read out from the memory, and necessary map data extracted from the map data read out from the memory for display. 2. The car navigation device according to claim 1, further comprising a map data extracting and displaying means for displaying on a screen. 3. A map display method for a car navigation device capable of performing both normal navigation and simple navigation processing operations, comprising: a selection step for selecting the simple navigation; and map data read from a memory such as a CD. A simple navigation execution step of clearing the screen of the display device after storing it in the display memory and displaying it on the display device, and then performing limited predetermined display such as road widening, landmark display, own vehicle position display, etc. And a map display method for a car navigation device. 4. The simple navigation execution step includes:
A map reading and displaying step for reading the map data of roads and the like around the own vehicle from a memory such as a CD based on the GPS output data, storing the read data in the display memory and displaying the map data on the screen of the display device; A screen erasing step for clearing, a road widening display step for widening and displaying a road around the own vehicle read from the memory, and a necessary map data extracted from the map data read from the memory. 4. A step of extracting and displaying map data to be displayed on a screen.
3. A map display method for a car navigation device according to claim 1.