JPH08234656A - Display method of navigation system - Google Patents

Abstract

(57) [Abstract] [Problem] It is necessary to change the visibility of a map in a vehicle navigation display depending on the traveling state. [Structure] When a current position of the vehicle is drawn from the locator 2 and a map is drawn from the map memory 3 to the image memory 12 and displayed on the color display 4 by the image data / color signal conversion unit 13, the running state of the vehicle from the vehicle speed sensor 5 The table selection unit 15 detects the image data / color signal table 14
Select to display a detailed map at a speed less than the preset speed, and display a rough map at a speed faster than the preset speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display method of an on-vehicle type navigation system for displaying a current position of a vehicle and a map around the vehicle. Stop, traveling, or traveling at low speed,
The present invention relates to a display method capable of being changed according to a traveling state of a vehicle such as high-speed traveling.

[0002]

2. Description of the Related Art In a conventional display method of a vehicle-mounted navigation system, a current position of a vehicle detected by a locator and a map around the current position stored in a map memory are drawn in an image memory. Referring to one type of color combination table for converting each pixel data (current position mark, road, background, etc.) of a drawn figure into a color signal, the current position, road, surrounding buildings, etc. are colored. The color signal is converted into a signal, and the color signal is displayed on a color display.

[0003]

By the way, at the beginning of the development of the navigation system, a detailed map was displayed as much as possible from the viewpoint of wanting the vehicle to travel without getting lost on the road. However, in order for a driver to read a detailed map,
It is necessary to pay attention to the map displayed on the screen, and a detailed map while driving (especially when driving at high speed) is rather difficult to see. Therefore, a detailed map is displayed when the vehicle is stopped or traveling at low speed, and information necessary for traveling is displayed during traveling, for example, information about which one is currently driving and which major road is being displayed. Therefore, it is necessary to improve the visibility during traveling.

[0004] However, conventionally, the display of the map is switched by a driver by operating a selection device disposed at an appropriate position (Japanese Patent Laid-Open No. 62-38686), and the switching of the display is troublesome. There has been a problem that a display suitable for a traveling state is not always displayed. Also,
Map data is large, and information necessary for driving,
Since it takes time to rewrite each pixel data by distinguishing it from other information, there is the inconvenience that the detailed map will not be switched to the rough map immediately even when the vehicle is stopped or running at low speed, and then switched to high speed. there were.

The present invention has been made in view of the above problems, and displays information necessary for traveling when the vehicle starts traveling from a stop or when the vehicle is stopped or when the vehicle travels from low speed to high speed. It is an object of the present invention to provide a display method with excellent visibility, which allows the user to instantly switch to a display map.

[0006]

According to the present invention for achieving the above object, a current position of a vehicle detected by a locator and a map around the current position are drawn in an image memory, and the map is drawn in the image memory. It is a display method of converting each pixel data into a color signal and displaying it on a display, and has the following features.

The traveling state detecting means detects whether the vehicle is currently stopped or less than a predetermined traveling speed (low speed traveling) or at least a predetermined traveling speed (high speed traveling). When it is detected that the detected running state is stopped or in a low speed state less than a predetermined speed, a detailed map is displayed, and it is detected that the running state of the vehicle is a high speed state that is equal to or higher than a predetermined speed. Sometimes there is a way to display a rougher map than the detailed map.

When it is detected that the vehicle is in a high speed state above a predetermined speed, a background color other than the information necessary for traveling is displayed on the detailed map, so that the vehicle is driven in a color other than the background color. There is a method of displaying necessary information as the rough map.

Further, the detailed map and the rough map have a method of being displayed by selecting one table from a plurality of pixel data / color signal conversion tables corresponding to the running state.

[0010]

With the above configuration, the detailed map display and the rough map display can be automatically switched depending on the running state of the vehicle. That is, the pixel data / color signal conversion table relating to a predetermined color combination is selected from the two pixel data / color signal conversion tables by the table selection means depending on whether the vehicle is stopped, running at low speed, or running at high speed. Next, each pixel data is converted into a color signal selected by the table selecting means by the pixel data / color signal converting means. Then, the converted color signal, that is, the video signal is supplied to the display. Thereby, an image according to the running state of the vehicle can be provided on the display.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A display method of a navigation system according to the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1 is a functional block diagram showing one embodiment of the display device according to the present invention. In the figure, 1 is a display control device,
A locator device 2, a map memory 3, a color display 4, and a vehicle speed sensor 5 are connected to the display control device 1.

The locator 2 detects the current position of the vehicle based on the traveling distance data and the traveling direction data of the vehicle. As the position detection method of the locator 2, there are a method using so-called map matching navigation and a method using dead reckoning navigation, and any of them can be adopted. The map memory 3 stores a road map within a predetermined range (for example, in Japan) by dividing it into a plurality of scales, and stores the contents of roads, intersections, famous buildings, railways, rivers, etc. It is.

The display control device 1 includes a drawing unit 11, an image memory
12, a pixel data / color signal conversion unit 13, a pixel data / color signal conversion table 14, and a table selection unit 15. Drawing unit 11
Writes in the image memory 12 the current position detected by the locator 2 and all figures stored in the map memory 3 such as roads and buildings around the current position. This written figure is represented as shown in FIG. A, B, C, D
Is a road, E is a current position mark, and F is a back. At this time, pixel data (number) defined in Table 1 below is given to each figure.

[0014]

[Table 1]

The image memory 12 stores each figure written by the drawing unit 11 as image data. Pixel data /
The color signal conversion table 14 indicates that the vehicle is stopped or running at low speed (for example, 0 km / h to less than 5 km / h) and running at high speed (5 km / h).
There are two types of tables in which the color combinations of the pixel data are different depending on the time. Table 2 below shows specific examples of these two types of tables. That is, when the vehicle is stopped or running at low speed, the road A is displayed in red and the other roads are displayed in green according to the table 1. During high-speed running, the roads B, C, and D other than the running road are colored in the same black as the back.

[0016]

[Table 2]

The table selection section 15 receives a signal from the vehicle speed sensor 5 to stop the vehicle or to drive the vehicle at a low speed or at a high speed.
A desired color combination table is selected from the types of color combination tables. Examples of the vehicle speed sensor 5 include a wheel speed sensor that detects rotation of driving wheels. The pixel data / color signal converter 13 converts each pixel data into a table selector 15.
To a color signal corresponding to the table selected by
This is output to the display. Color display 4
Displays a current position, a road, a building, a back, and the like based on a color signal, that is, a video signal.

According to the display method of the navigation system of the embodiment, when the vehicle speed sensor 5 detects that the vehicle is running at high speed, the table selecting section 15 selects the table 2. Then, the pixel data / color signal conversion unit 13 refers to Table 2 and converts the pixel data of Table 1 into color signals for high-speed traveling. As a result, the roads other than the traveling road can be made the same color as the back, and the graphic design shown in FIG. 2 can be displayed in a color design with good visibility as shown in FIG. Can be.

On the contrary, when the vehicle speed sensor 5 detects the stop or low speed running of the vehicle, the table 1 is selected and the color signal is converted from the color design for high speed running to the color design for stopping or low speed running. . Thus, a detailed road map can be examined, and a detour can be selected.

In the above-described embodiment, the pixel data / color signal conversion table has two types of tables, that is, when the vehicle is stopped or running at low speed and when the vehicle is running at high speed. Thus, various design changes can be made within a range that does not change the gist of the present invention, for example, it is possible to provide two or more types of tables with improved visibility stepwise.

[0021]

According to the present invention described above, a desired color combination is selected from a plurality of color combinations by the table selecting means depending on the speed of the vehicle, that is, whether the vehicle is stopped or running at a low speed or running at a high speed. By selecting and converting each pixel data to the color signal selected by the table selecting means by the pixel data / color signal converting means, it is not necessary to rewrite each pixel data of the image memory as in the prior art. When the speed of the vehicle is detected, an effect is obtained in that a map or the like can be immediately displayed in a color design during traveling.

An image representing unnecessary information at the time of traveling is provided with a pixel data / color signal conversion table which makes the same color scheme as the background color (back). State) is provided to detect all the detailed map information on the display by using the low-speed pixel data / color signal conversion table when the vehicle is stopped or running at low speed, and the vehicle is running at high speed. When it is detected that the vehicle has entered the vehicle, the image is displayed on the display via the high-speed pixel data / color signal conversion table, so that information other than the information necessary for high-speed driving is hidden by the background color and apparently erased. Screen.

With this, detailed map information is displayed immediately when the vehicle is stopped or running at a low speed according to the speed of the vehicle without the need for a person to change the display during driving, and an accurate road to the destination can be displayed. Guidance is provided, and at high speed traveling, only the map information required at the time of high speed traveling is displayed to improve the visibility, thereby achieving a unique effect.

[0024]

[Brief description of drawings]

FIG. 1 is a functional block diagram showing one embodiment of a display device according to the present invention.

FIG. 2 is a diagram written in an image memory.

FIG. 3 is a display screen during traveling.

[Explanation of symbols]

 1 ... Display control device 5 ... Vehicle speed sensor 11 ... Drawing unit 12 ... Image memory 13 ... Pixel data / color signal conversion unit 14 ... Pixel data / color signal conversion table 15 ... Table selection unit

Claims (3)

[Claims] 1. A navigation system in which a current position of a vehicle detected by a locator and a map around the current position are drawn in an image memory, and each pixel data drawn in the image memory is converted into a color signal and displayed on a display. In the display method of the system, a running state of the vehicle is detected by the running state detecting means, and when it is detected that the running state of the vehicle is stopped or a low-speed state lower than a predetermined speed, a detailed map is displayed. Displaying a map coarser than the detailed map when it is detected that the traveling state of the vehicle has exceeded a predetermined speed. 2. The display method according to claim 1, wherein the coarse map is displayed by making a part of the detailed map the same as a background color. 3. The detailed map and the coarse map are displayed by selecting a pixel data / color signal conversion table for converting pixel data into a color signal. How to display the navigation system.